CRT 48 Operation - Wacker Neuson

OPERATOR’S MANUAL 

0 1 6 3 2 0 4 E N 

0163204en 002 

1108 

Ride-On Trowels 

CRT 48-31V 



CRT 48-35L

Foreword 

WARNING 

CALIFORNIA 

Proposition 65 Warning: 

Engine exhaust, some of its constituents, and certain vehicle 

components, contain or emit chemicals known to the State of 

California to cause cancer and birth defects or other reproductive 

harm. 

This manual provides information and procedures to safely operate 

and maintain this Wacker Neuson model. For your own safety and 

protection from injury, carefully read, understand and observe the 

safety instructions described in this manual. 

Keep this manual or a copy of it with the machine. If you lose this 

manual or need an additional copy, please contact Wacker Neuson 

Corporation. This machine is built with user safety in mind; however, 

it can present hazards if improperly operated and serviced. Follow 

operating instructions carefully! If you have questions about operating 

or servicing this equipment, please contact Wacker Neuson 

Corporation. 

The information contained in this manual was based on machines in 

production at the time of publication. Wacker Neuson Corporation 

reserves the right to change any portion of this information without 

notice. 

All rights, especially copying and distribution rights, are reserved. 

Copyright 2008 by Wacker Neuson Corporation. 

No part of this publication may be reproduced in any form or by any 

means, electronic or mechanical, including photocopying, without 

express written permission from Wacker Neuson Corporation. 

Any type of reproduction or distribution not authorized by Wacker 

Neuson Corporation represents an infringement of valid copyrights 

and will be prosecuted. We expressly reserve the right to make 

technical modifications, even without due notice, which aim at 

improving our machines or their safety standards. 

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CRT 48 Table of Contents 

Foreword 3 

1. Safety Information 7 

1.1 Laws Pertaining to Spark Arresters ...................................................... 7 

1.2 Operating Safety .................................................................................. 8 

1.3 Operator Safety while using Internal Combustion Engines .................. 9 

1.4 Service Safety .................................................................................... 10 

1.5 Transport Safety ................................................................................. 10 

1.6 Label Locations .................................................................................. 11 

1.7 Safety and Operating Labels .............................................................. 13 

2. Operation 19 

2.1 Description ......................................................................................... 19 

2.2 Features and Controls ........................................................................ 20 

2.3 New Machines .................................................................................... 22 

2.4 Before Starting ................................................................................... 23 

2.5 Starting-Vanguard .............................................................................. 23 

2.6 Starting-Lombardini ............................................................................ 23 

2.7 Stopping ............................................................................................. 24 

2.8 Operation ............................................................................................ 24 

2.9 Steering .............................................................................................. 25 

2.10 Pitch Adjustment ................................................................................ 26 

3. Maintenance 27 

3.1 Periodic Maintenance Schedule ......................................................... 27 

3.2 Trowel Gearboxes .............................................................................. 28 

3.3 Control Linkage Lubrication ................................................................ 30 

3.4 Control Arm Adjustment (Forward or Backward) ................................ 30 

3.5 Steering Assist System ...................................................................... 30 

3.6 Right-hand Control Arm Adjustment (Right or Left) ............................ 31 

3.7 Blade Arm Adjustment ........................................................................ 32 

3.8 Mounting Float Pans .......................................................................... 32 

3.9 Transporting Trowels .......................................................................... 33 

3.10 Drive Belt ............................................................................................ 34 

3.11 Battery Jump Start Procedure ............................................................ 35 

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Table of Contents CRT 48 

3.12 Spark Plug-Vanguard ..........................................................................36 

3.13 Air Cleaner ..........................................................................................37 

3.14 Engine Oil and Filter–Vanguard Engines ............................................38 

3.15 Engine Oil and Filter–Lombardini Diesel .............................................40 

3.16 Troubleshooting ...................................................................................41 

4. Technical Data 43 

4.1 Engine .................................................................................................43 

4.2 Trowel ..................................................................................................44 

4.3 Sound and Vibration Specifications .....................................................45 

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CRT 48 Safety Information 

1. Safety Information 

DANGER 

WARNING 

CAUTION 

This manual contains DANGER, WARNING, CAUTION, NOTICE and 

NOTE callouts which must be followed to reduce the possibility of 

personal injury, damage to the equipment, or improper service. 

This is the safety alert symbol. It is used to alert you to potential 

personal injury hazards. Obey all safety messages that follow this 

symbol to avoid possible injury or death. 

DANGER indicates a hazardous situation which, if not avoided, will 

result in death or serious injury. 

WARNING indicates a hazardous situation which, if not avoided, could 

result in death or serious injury. 

CAUTION indicates a hazardous situation which, if not avoided, could 

result in minor or moderate injury. 

NOTICE: Used without the safety alert symbol, NOTICE indicates a 

situation which, if not avoided, could result in property damage. 

Note: Contains additional information important to a procedure. 

1.1 Laws Pertaining to Spark Arresters 

Notice: State Health Safety Codes and Public Resources Codes 

specify that in certain locations spark arresters be used on internal 

combustion engines that use hydrocarbon fuels. A spark arrester is a 

device designed to prevent accidental discharge of sparks or flames 

from the engine exhaust. Spark arresters are qualified and rated by 

the United States Forest Service for this purpose. 

In order to comply with local laws regarding spark arresters, consult 

the engine distributor or the local Health and Safety Administrator. 

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Safety Information CRT 48 

1.2 Operating Safety 

Familiarity and proper training are required for the safe operation of the 

machine. Machines operated improperly or by untrained personnel can 

be dangerous. Read the operating instructions contained in both this 

manual and the engine manual and familiarize yourself with the location 

and proper use of all controls. Inexperienced operators should receive 

instruction from someone familiar with the machine before being allowed 

to operate it. 

1.2.1 NEVER operate this machine in applications for which it is not intended. 

1.2.2 Do not allow anyone to operate this equipment without proper training. 

People operating this equipment must be familiar with the risks and 

hazards associated with it. 

1.2.3 Do not touch the engine or muffler while the engine is on or immediately 

after it has been turned off. These areas get hot and may cause burns. 

1.2.4 Do not use accessories or attachments that are not recommended by 

Wacker Neuson. Damage to equipment and injury to the user may 

result. 

1.2.5 NEVER operate the machine with the beltguard missing. Exposed drive 

belt and pulleys create potentially dangerous hazards that can cause 

serious injuries. 

1.2.6 NEVER leave the machine running unattended. 

1.2.7 Do not run the machine indoors or in an enclosed area such as a deep 

trench unless adequate ventilation, through such items as exhaust fans 

or hoses, is provided. Engine exhaust contains carbon monoxide. This is 

a poison you cannot see or smell. Exposure to carbon monoxide can 

cause loss of consciousness and CAN KILL YOU IN MINUTES. 

1.2.8 ALWAYS remain aware of moving parts and keep hands, feet, and loose 

clothing away from the moving parts of the machine. 

1.2.9 ALWAYS wear protective clothing appropriate to the job site when 

operating the machine. 

1.2.10 Read, understand, and follow procedures in the Operator’s Manual 

before attempting to operate the machine. 

1.2.11 Be sure operator is familiar with proper safety precautions and operation 

techniques before using machine. 

1.2.12 Close fuel valve on engines equipped with one when machine is not 

being operated. 

1.2.13 Store the machine properly when it is not being used. The machine 

should be stored in a clean, dry location out of the reach of children. 

1.2.14 ALWAYS operate the machine with all safety devices and guards in 

place and in working order. 

WARNING 

8


1.3 Operator Safety while using Internal Combustion Engines 

DANGER 

Internal combustion engines present special hazards during operation 

and fueling. Read and follow the warning instructions in the engine 

owner’s manual and the safety guidelines below. Failure to follow the 

warnings and safety standards could result in severe injury or death. 

1.3.1 Do not run the machine indoors or in an enclosed area such as a deep 

trench unless adequate ventilation, through such items as exhaust fans 

or hoses, is provided. Engine exhaust contains carbon monoxide. This is 

a poison you cannot see or smell. Exposure to carbon monoxide can 

cause loss of consciousness and CAN KILL YOU IN MINUTES. 

1.3.2 Do not smoke while operating the machine. 

1.3.3 Do not smoke when refueling the engine. 

1.3.4 Do not refuel a hot or running engine. 

1.3.5 Do not refuel the engine near an open flame. 

1.3.6 Do not spill fuel when refueling the engine. 

1.3.7 Do not run the engine near open flames. 

1.3.8 Refill the fuel tank in a well-ventilated area. 

1.3.9 Replace the fuel tank cap after refueling. 

1.3.10 Keep the area around the muffler free of debris such as leaves, paper, 

cartons, etc. A hot muffler could ignite the debris and start a fire. 

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1.4 Service Safety 

WARNING 

A poorly maintained machine can become a safety hazard! In order 

for the machine to operate safely and properly over a long period of 

time, periodic maintenance and occasional repairs are necessary. 

1.4.1 Do not attempt to clean or service the machine while it is running. 

Rotating parts can cause severe injury. 

1.4.2 Do not crank a flooded engine with the spark plug removed on 

gasoline-powered engines. Fuel trapped in the cylinder will squirt out 

the spark plug opening. 

1.4.3 Do not test for spark on gasoline-powered engines if the engine is 

flooded or the smell of gasoline is present. A stray spark could ignite 

the fumes. 

1.4.4 Do not use gasoline or other types of fuels or flammable solvents to 

clean parts, especially in enclosed areas. Fumes from fuels and 

solvents can become explosive. 

1.4.5 ALWAYS turn engine off and remove key from machine before 

performing maintenance or making repairs. 

1.4.6 ALWAYS handle blades carefully. The blades can develop sharp 

edges which can cause serious cuts. 

1.4.7 Keep the area around the muffler free of debris such as leaves, paper, 

cartons, etc. A hot muffler could ignite the debris and start a fire. 

1.4.8 Replace worn or damaged components with spare parts designed and 

recommended by Wacker Neuson Corporation. 

1.4.9 Disconnect the spark plug on machines equipped with gasoline 

engines, before servicing, to avoid accidental start-up. 

1.4.10 ALWAYS switch off the power supply at the battery disconnect before 

adjusting or maintaining the electrical equipment. 

1.4.11 Keep the machine clean and labels legible. Replace all missing and 

hard-to-read labels. Labels provide important operating instructions 

and warn of dangers and hazards. 

1.5 Transport Safety 

1.5.1 Always engage the steering handle lock before lifting the machine. 

WARNING 

DO NOT lift the trowel by the guard rings or any part of the trowel other 

than the lifting fixture, as the component may fail, causing the trowel to 

fall, possibly injuring bystanders. 

10


T 

S 

R 

F 

1.6 Label Locations 

D 

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M 

Z 

I 

Q 

BB 

N 

Z 

L CC 

BB 

M 

E 

U 

I 

L 

Q 

wc_gr003770 

C


W 

H 

V 

M 

J 

O 

BB 

12 

BB M 

W 

G 

H 

AA 

K 

wc_gr003771 

A/B


1.7 Safety and Operating Labels 

Wacker Neuson machines use international pictorial labels where 

needed. These labels are described below: 

Ref. Label Meaning 

A DANGER! 

No sparks, flames, or burning objects near the 

machine. Shut off the engine before refueling. 

Use only clean, filtered unleaded gasoline. 

Engines emit carbon monoxide; operate only 

in well-ventilated area. 

B DANGER! 

No sparks, flames, or burning objects near the 

machine. Shut off the engine before refueling. 

Use only clean, filtered diesel fuel. Engines 

emit carbon monoxide; operate only in wellventilated 

area. 

C Water tank fill. Use only clean water or waterbased 

retardants. 

D WARNING! 

Always wear hearing and eye protection when 

operating this machine. 

E Steering control. Refer to section Steering. 

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F WARNING! 

Read and understand the supplied Operator’s 

Manual before operating the machine. Failure 

to do so increases the risk of injury to yourself 

or others. 

G WARNING! 

Hot surface! 

H WARNING! 

Cutting hazard. Always replace blade guard! 

J WARNING! 

Pressurized contents. Do not open when hot! 

K WARNING! 

Hand injury if caught in moving belt. 

Always replace beltguard. 

L CAUTION! 

Lifting point. 

M Tie-down point. 

14



N Key switch, engine start: 

Off 

On 

Start 

O Operator’s Manual must be stored on 

machine. Replacement Operator’s Manual can 

be ordered through your local Wacker Neuson 

distributor. 

P WARNING! 

4 A � � L A F = � B H � � J H � M A � > A B � H A � E B J E � C � = ? D E � A 

� L A H D A = @ � 

2 = � I ? = � B = � � = � @ ? = K I A @ A = J D � H I A H E � K I E � � K H O E B 

= F A H I � � E I D E J � 

/ � A E J I ? D A E > A L � � * A J � � C � � J J A H A � J B A H � A � > A L � H 

@ = I / A H � J K > A H � � F B D � D A C A D � > A � M E H @ � 

/ � A E J I ? D A E > A � = � � B = � � A � K � @ I ? D M A H A 8 A H � A J � K � C 

� @ A H 6 � @ L A H K H I = ? D A � M A � � 2 A H I � � = � C A J H � B B A � M E H @ � 

3 K E J A A � @ E I ? � @ A B � � J = ? E � � = � J A I @ A � A L = � J = H � = 

� � G K E � = = � E I = @ � H = @ A D � H � E C � � � 

� � I @ E I ? � I F � @ H � = � ? = A H O � = J = H � � = I J E � = H 

I A H E = � A � J A = K � = F A H I � � = G K A I A A � ? K A � J H A ? A H ? = � 

) L = � J @ A � A L A H � \ = F F = H A E � = K � @ A I I K I @ A L � J H A J � J A � 

� J A H � A @ E I G K A @ A J = � � ? D = C A @ A � = J H K A � � A � 

� A @ E I G K A @ A J = � � ? D = C A F A K J J � � > A H A J A � J H = � � A H 

@ A C H = L A I > � A I I K H A I � K � � � A � = � � H J � 

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& $ & & 

Remove pan from trowel before lifting machine 

overhead. Pans can fall and cause death or 

serious injury if a person is hit. (Located on top 

side of float pan.) 

Q Blade pitch control. Turn both controls inward 

to increase blade pitch. Refer to section Pitch 

Adjustment. 

R CAUTION! 

Engine oil pressure is low! Stop the engine 

and check the oil level. 

S CAUTION! 

Low voltage! Stop the engine and check the 

charging system.



T CAUTION! 

Coolant temperature is too high. Stop the 

engine and check the coolant level. 

U CAUTION! 

Glow plugs activated. Do not start engine until 

light turns off. 

V WARNING! 

Pinching hazard. Rotating machinery. 

W Use only Glygoyle 460 gear oil in gearbox. 

WACKER NEUSON 

X A nameplate listing the model number, item 

number, revision number, and serial number is 

attached to each unit. Please record the 

information found on this plate so it will be 

available should the nameplate become lost or 

damaged. When ordering parts or requesting 

service information, you will always be asked 

to specify the model number, item number, 

revision number, and serial number of the unit. 

Y This machine may be covered by one or more 

patents. 

16



Z Steering system components are under load. 

See Steering section or a trained service 

technician for adjustments. 

AA Engage manual steering handle lock before 

lifting. 

BB Fork lift pockets. 

CC Low sulfur fuel or ultra low sulfur fuel only. 

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Notes 

18

CRT 48 Operation 

2. Operation 

2.1 Description 

The Ride-On Trowel is a modern, high production machine. Finishing 

rate will vary depending on operator skill and job conditions. The 

heavy-duty gearboxes are designed to provide exceptional 

performance, low maintenance, and trouble-free use in most 

conditions. The variable speed drive is designed to provide higher 

torque, to optimize performance with the use of pans. The machine 

can be used with either two pans or ten finishing blades. 

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Operation CRT 48 

2.2 Features and Controls 

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Control locations and functions: 

Ref. Description Ref. Description 

a Right pitch control l Engine choke control (if equipped) 

b Fuel tank m Work light switch 

c Control arms n Glow plug indicator light (if 

equipped) 

d Operator’s seat with “operator 

presence” switch 

o Engine keyswitch 

e Left pitch control p Hour meter 

f Rear work light (one each side) q Water spray control 

g Water tank r Oil pressure indicator light 

h Work light (one each side) s Alternator charging indicator light 

k Foot pedal (throttle control) t Coolant temperature indicator light 

The Ride-On Trowel features a seat with an integrated “operator 

presence” system, which works in conjunction with a throttle mounted 

switch. This system allows the engine to remain running (idling) with 

no operator seated in the seat, as long as the throttle is not depressed. 

This system meets all safety requirements and eliminates the need for 

a foot-operated “kill switch”. 

To familiarize a new operator with the Ride-On Trowel the following 

steps should be taken: 

2.2.1 With the operator in the seat, show him or her the functions of the 

control arms (c) and how to start the machine. 

2.2.2 Have the operator practice steering the trowel. A hard concrete slab 

slightly wetted with water is an ideal place for an operator to practice 

with the machine. For this practice, pitch the blades up approximately 

6,35 mm (¼") on the leading edge. Start by making the machine hover 

in one spot, and then practice driving the machine in a straight line and 

making 180° turns. The best control is achieved at full rpm. 

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2.3 New Machines 

See Graphic: wc_gr001252 

2.3.1 To break in the gearboxes, run the engine at 50% of full throttle for the 

first 2–4 hours. This will prevent premature wear and extend gear life. 

NOTICE: Running the engine at full throttle during the break-in period 

could result in premature gear failure. 

2.3.2 Verify that the horizontal blade pitch links are properly assembled. 

When seated on the machine, the right rotor should have an “R” 

designation located towards the upper portion of the pitch link and the 

left rotor should have an “L”. 

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2.4 Before Starting 

2.5 Starting-Vanguard 

Before starting the trowel, check the following: 

• fuel level 

• oil level in the engine 

• condition of the air filter 

• condition of trowel arms and blades 

Grease the trowel arms daily. 

Before starting the operator must know the location and function of all 

controls. 

2.5.1 Turn and hold engine keyswitch until the engine starts. 

Note: If the engine is cold, pull out the choke control knob fully. 

NOTICE: Cranking the engine for more than 5 seconds can cause 

starter damage. If the engine fails to start, release the keyswitch and 

wait 10 seconds before operating the starter again. 

2.5.2 Allow the engine to warm up before operating the trowel. 

2.6 Starting-Lombardini 

Before starting the operator must know the location and function of all 

controls. 

2.6.1 Turn the engine keyswitch to the run position. 

2.6.2 When the glow plug indicator light turns off, turn keyswitch to start 

position and hold until the engine starts. 




2.6.3 Allow the engine to warm up before operating the trowel. 

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2.7 Stopping 

2.8 Operation 

To stop trowel movement, return control levers to their neutral position 

and release pressure on the throttle foot pedal. 

To stop the engine, turn the keyswitch to “O” (off). 

To utilize your Wacker Neuson Ride-On Trowel to its fullest capacity, 

the machine should be driven in the direction that the operator is 

facing. This will finish the widest possible area, while giving the 

operator an excellent view of the slab surface about to be troweled. 

When the machine reaches the end of the slab, make a 180° U-turn, 

and repeat the straight line of direction to the other end of the slab. 

Note: During the break-in period, run the engine at 50% of full throttle. 

Refer to Section New Machines. 

NOTICE: DO NOT use excessive pressure on the control levers. 

Excessive pressure does not increase the reaction time of the machine 

and can damage the steering controls. 

NOTICE: Attempting to use the trowel too early in the curing stage of 

the concrete may result in an undesirable finish. Only experienced 

concrete finishers should operate the trowel. 

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2.9 Steering 


Refer to the illustration for the necessary hand motions to move the 

trowel in the desired direction, described below. 

1 - forward 

2 - reverse 

3 - rotate clockwise 

4 - rotate counter-clockwise 

5 - left sideways 

6 - right sideways 

! " 

# $ 

wc_tx000641gb.fm 25 

M ? � C H $ & '


b 

2.10 Pitch Adjustment 

a 

wc_gr000147 


When changing or setting the pitch (angle) of the trowel blades, slow 

the machine, set the desired pitch on the left side of the machine, then 

adjust the right side to match. 

To increase the pitch, turn the pitch control inward (a). Use the pitch 

indicator (b) to adjust pitch equally on both right and left trowel blades. 

25° 4 

3 

2 

0° 1 

5-10º 


15º 

20-25º 

Working Conditions of 

Concrete 

Suggested Working 

Pitch 

1. Wet surface working stage Flat (No Pitch) 

2. Wet to plastic working 

stage 

Slight Pitch 

3. Semi-hard working stage Additional Pitch 

4. Hard finishing stage 

(burnishing) 

Maximum Pitch

CRT 48 Maintenance 

3. Maintenance 

3.1 Periodic Maintenance Schedule 

The chart below lists basic trowel and engine maintenance. Refer to engine manufacturer’s 

operator’s manual for additional information on engine maintenance. A copy of the engine 

operator’s manual was supplied with the machine when it was shipped. To service the engine, tilt 

the seat forward. 

Grease trowel arms. � 

Check fuel level. � 

Check engine oil level. � 


Daily Every 

20 

hrs. 

Every 

50 

hrs. 

Every 

100 

hrs. 

Every 

200 

hrs. 

Inspect air filter. Replace as needed. � � � 

Check external hardware. � 

Pressure wash all surfaces until free of 

concrete. 

Check coolant level. � 

Check oil level in gearboxes. � 

Grease gearbox input shaft fitting � 

Grease control linkage. 1 � 

Check drive belt for wear. � 

Change engine oil. 2, 3 � � 

Check fuel filter. � 

Clean and check spark plug. � 

Replace oil filter. 2 � � 

Check fan belt. � 

Replace spark plug. � 

Replace fuel filter. � 

Replace oil in gearboxes. � 

Change coolant. � 

1 Manual steering models only. 2 Perform initially after first 50 hours of operation. 

3 250 hours for diesel. 

� 

Every 

300 

hrs.

Maintenance CRT 48 

3.2 Trowel Gearboxes 


Check the gearboxes for the correct oil level after every 20 hours of 

operation. Change the gearbox oil every 300 hours. 

To check the oil level: 

Each CRT gearbox is equipped with two oil fill plugs. Remove one 

gearbox oil fill plug (b). If the level is below the threads of the oil fill plug 

hole, add synthetic gear oil through the opening. DO NOT overfill. 

Wipe the threads dry on both the gearbox and the oil fill plug, apply 

Loctite 545 or equivalent to the oil fill plug threads, replace the oil fill 

plug and torque to 16–20 Nm (12–15 ft.lbs.). 

NOTICE: DO NOT mix types of gear oil. DO NOT overfill the gearbox 

with oil. Damage to the gearbox may occur if oils are mixed, or if the 

gearbox is overfilled. See Technical Data for oil quantity and type. 

To change gearbox oil: 

3.2.1 Place a container of sufficient capacity (approximately 3.8 l [1 gallon]) 

under each gearbox. 

3.2.2 Remove the gearbox oil drain plug (c) and allow the oil to drain out. It 

may be necessary to remove the gearbox oil fill plug(s) to facilitate 

draining. After most of the oil has drained out, tip the back of the trowel 

upwards to allow the remaining oil to drain out. 

3.2.3 After all the oil has drained out, wipe the threads dry on both the 

gearbox and the oil drain plug, apply Loctite 545 or equivalent to the oil 

drain plug threads, and replace the gearbox oil drain plug. 

Note: Dispose of used gear oil in accordance with environmental 

protection legislation. 

3.2.4 With the trowel level, fill the gearbox with approximately 1.83 l (62 oz.) 

synthetic gear oil through the oil fill plug as described above. 

3.2.5 Wipe the threads dry on both the gearbox and the oil fill plug, apply 

Loctite 545 or equivalent to the oil fill plug threads, replace the oil fill 

plug(s), and torque all plugs to 16-20 Nm (12–15 ft.lbs.). 

Each gearbox has a pressure relief valve (a) which can become 

clogged over time. Check or replace as needed. Failure to replace the 

valve can result in oil leakage from the gearbox shaft seals. 

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3.3 Control Linkage Lubrication 

The drive system, gearbox and pitch posts are equipped with several 

grease fittings. Grease these fittings once a week, or every 20 hours, 

to prevent wear. 

Use a general purpose grease and add one to two shots of grease at 

each fitting. 

3.4 Control Arm Adjustment (Forward or Backward) 


The control arms should line up evenly. If arms appear out of 

adjustment, they can be re-adjusted forward or backward as follows: 

3.4.1 Loosen jam nuts (b). 

3.4.2 Turn the vertical linkage (a) as follows: 

• Extend the linkage to adjust control levers forward. See section 

4.5 before extending linkage. 

• Shorten the linkage to adjust control levers backward. 

3.4.3 After the arms have been adjusted to the desired position, tighten jam 

nuts (b). 

NOTICE: Control arms are adjusted as part of the steering assist system. 

Changing orientation of the control arms may affect steering effort. 

3.5 Steering Assist System 

The steering assist system is comprised of the torsion lever (f), the 

torsion lever assembly (g), and the assist link (h). The system preload 

must be removed before any other steering components can be 

removed or separated. Remove the 1/2-20 x 3.5-inch bolts (i) to unload 

the system. To re-apply system preload, re-attach and tighten bolts (i) 

to the factory setting. 

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f 

i 

3.6 Right-hand Control Arm Adjustment (Right or Left) 


The arms should be set to be perfectly vertical. Should the arms come 

out of adjustment, adjust as follows: 

3.6.1 Loosen the jam nuts (d). 

3.6.2 Drop the horizontal linkage (e) down to clear the bracket. 

3.6.3 Shorten the linkage to move the control arms to the left. 

3.6.4 Extend the linkage to move the control arms to the right. 

3.6.5 After the control lever has been adjusted to the desired position, 

reassemble the nut and the bolt (c) and tighten the jam nuts (d). 


h 

d 

g g 

h 

f 

i


3.7 Blade Arm Adjustment 

To eliminate wobble: 

3.7.1 Pitch the blades flat. 

3.7.2 Tighten lock nut located at the bottom of each pitch cable. Maximum 

cable play should be no more than 3.18 mm (.125”) or the width of the 

cable. 

3.7.3 Set gap on all adjustable links to 4.58 mm (.180 in.). 

3.8 Mounting Float Pans 


Certain applications may require the use of float pans. Optional float 

pans (a) are available, and are used with the machines in the nonoverlapping 

configuration only. 

To mount float pans: 

Lift trowel off the ground with the engine off and position the pan 

against the blades. Turn pan either to the right or left to engage clip 

angles (b) as shown. Remember, the right-hand trowel blades turn 

counterclockwise; the left-hand blades turn clockwise. 

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3.9 Transporting Trowels 


CAUTION 

WARNING 

Engage the steering lock as shown before lifting the machine. If left 

unlocked, steering handles can swing forward rapidly as the machine 

is lifted. 

To lift the trowel with a fork lift: 

Fork lift pockets (a) are provided on both the front and back of the 

machine. Carefully insert the lifting forks into each fork lift pocket. 

To hoist the trowel: 

Attach a sling or chains through the lifting bars (b) on each side of the 

seat pedestal. 

NOTICE: Make sure the lifting device has enough weight-bearing 

capacity to lift machine safely. Refer to Section Technical Data. 

DO NOT lift the trowel by the guard rings or any part of the trowel other 

than the lifting fixture, as the component may fail, causing the trowel to 

fall, possibly injuring bystanders. 


wc_gr003774


3.10 Drive Belt 


To replace the drive belt: 

3.10.1 Place the trowel on a flat, level surface with the blades pitched flat. 

3.10.2 Disconnect battery. 

3.10.3 Remove the beltguard. 

3.10.4 Remove the 3 bolts (a) holding the universal joint to the drive pulley. 

3.10.5 Remove the old belt and install a new one. 

3.10.6 Reverse the procedure for assembly. Align the bearings and shaft as 

straight as possible. Adjust pulley offset and center distance to values 

as shown. 

3.10.7 Torque the universal joint bolts (a) to 14 ±1,4 Nm (10±1 ft.lbs.). 

wc_tx000642gb.fm 34


3.11 Battery Jump Start Procedure 

DANGER 

WARNING 

Occasionally, it may be necessary to jump start a weak battery. If jump 

starting is necessary, the following procedure is recommended to 

prevent starter damage, battery damage, and personal injuries. 

Jump starting a battery incorrectly can cause battery to explode, 

resulting in severe personal injury or death. Do not smoke or allow 

ignition sources near the battery, and do not jump start a frozen 

battery. 

Electrical arcing can cause severe personal injury. Do not allow 

positive and negative cable ends to touch. 

3.11.1 Disconnect engine load. 

3.11.2 Use a battery of the same voltage (12V) as is used with your engine. 

3.11.3 Attach one end of the positive booster cable (red) to the positive (+) 

terminal of the booster battery. Attach the other end to the positive 

terminal of your engine battery. 

3.11.4 Attach one end of the negative booster cable (black) to the negative 

(–) terminal of the booster battery. Attach other end of negative cable 

to a solid chassis ground on your engine. 

NOTICE: Jump starting in any other manner may result in damage to 

the battery or the electrical system. 

3.11.5 Push down on the throttle foot pedal, turn the engine keyswitch and 

hold it until the engine starts. 




NOTICE: When using lights or high amperage draw accessories, idle 

the engine for a period of 20 minutes to bring the battery to charge 

state. 

wc_tx000642gb.fm 35


3.12 Spark Plug-Vanguard 

WARNING 

Clean or replace spark plug as needed to ensure proper operation. 

Refer to the engine owner’s manual. 

Note: Refer to the Technical Data for the recommended spark plug 

type and the electrode gap setting. 

The muffler and engine cylinder become very hot during operation and 

remain hot for a while after stopping the engine. Allow engine to cool 

before removing spark plug. 

3.12.1 Remove spark plug and inspect it. 

3.12.2 Replace plug if the insulator is cracked or chipped. Clean spark plug 

electrodes with a wire brush. 

3.12.3 Set the electrode gap. 

3.12.4 Tighten spark plug securely. 

NOTICE: A loose spark plug can become very hot and may cause 

engine damage. 

wc_tx000642gb.fm 36


3.13 Air Cleaner 


3.13.1 Unlock clamps (a) and remove cover (b). 

3.13.2 Remove cartridge (c) from air cleaner body. 

The filter can be cleaned by blowing compressed air breadthways 

outside and inside the cartridge, at a pressure not greater than 4.9 bar 

(70 psi), or by knocking the front of the filter several times against a flat 

surface. Replace filter if it appears heavily soiled or damaged. 

3.13.3 Carefully clean out air cleaner cover. 

WARNING 

NEVER use gasoline or other types of low flash point solvents for 

cleaning the air cleaner. A fire or explosion could result. 

3.13.4 Install filter in body. 

3.13.5 Install cover and lock clamps. 

NOTICE: NEVER run engine without air cleaner. Severe engine 

damage will occur. 

wc_tx000642gb.fm 37


3.14 Engine Oil and Filter–Vanguard Engines 

See Graphic: wc_gr000217, wc_gr003803 

Change oil and oil filter (d) every 100 hours. On new machines, 

change oil after first 50 hours of operation. Drain oil while engine is still 

warm. 

Note: In the interests of environmental protection, place a plastic sheet 

and a container under the machine to collect any liquid which drains 

off. Dispose of this liquid in accordance with environmental protection 

legislation. 

Drain oil while engine is still warm. 

3.14.1 Remove oil fill cap (a) and drain plug (b) to drain oil. 

3.14.2 Install drain plug and torque to 34.6 Nm (25.5 ft.lbs.). 

3.14.3 Fill engine crankcase with recommended oil until the level is between 

“L” and “F” on the dipstick (c). See Technical Data for oil quantity and 

type. 

3.14.4 Install oil fill cap. 

3.14.5 To replace the oil filter (d), remove the installed oil filter after oil has 

been drained. Apply a thin coat of oil to the rubber gasket of the 

replacement oil filter. Screw the filter on until it just contacts the filter 

adapter, then turn it an additional ½ turn. Refill with oil as described 

above. 

wc_tx000642gb.fm 38



b 

d 



a 

c 

wc_gr003803


3.15 Engine Oil and Filter–Lombardini Diesel 


Change oil every 125 hours and oil filter (b) every 250 hours. On new 

machines, change oil after first 50 hours of operation. Drain oil while 

engine is still warm. 

Note: In the interests of environmental protection, place plastic 

sheeting and a container under the machine to collect the liquid which 

drains off. Dispose of this liquid properly. 

3.15.1 

To change oil: 

Remove oil filler cap (a) and oil drain plug (c). Drain oil into a suitable 

container. 

3.15.2 Reinstall the drain plug and tighten. 

3.15.3 Remove and replace oil filter (b). 

3.15.4 Remove oil filler cap (a) and fill engine crankcase with recommended 

oil. See Technical Data for oil quantity and type. 

3.15.5 Install oil filler cap. 

wc_tx000642gb.fm 40


3.16 Troubleshooting 

Problem Reason Remedy 

Machine out of balance; 

wobbling excessively. 

Poor handling; excessive 

range in control lever movement. 


Operator is over-steering. The movement of each 

gearbox is controlled by 

“stops” to provide the 

correct relationship of the 

control arm movement to 

machine movement. 

Excessive pressure on 

control arms in any 

direction will not increase 

reaction time and can 

damage steering controls 

causing machine to wobble. 

Trowel arm(s) bent. Replace trowel arm(s). 

Trowel blade(s) bent. Replace trowel blade(s). 

Main shaft(s) bent due to 

machine being dropped. 

Worn bushings due to lack 

of lubrication. 

Control arm lever adjustment 

has moved or control 

arm has been bent. 

Lower control arm(s) bent. 

This can be caused by 

dropping machine. 

Replace main shafts(s). 

Replace bushings and 

lubricate at least every 20 

hours. 

Reset control arm lever. 

Replace lower control 

arm(s). Use lifting brackets 

and/or forklift pockets provided 

on machine for lifting. 

Machine does not move. Drive belt broken. Replace drive belt. 

Vacuum between bottom of 

blades and surface of 

concrete. 

Key sheared in the main 

shaft. 

Change pitch on blades to 

break suction. 

Replace damaged key.


Problem Reason Remedy 

Machine does not respond 

correctly to control lever 

movement. 


Sheared key. Check all keys in drive 

system. 

Trowel noisy. Trowel blades have 

become misaligned and are 

contacting each other 

during rotation. 

Replace damaged blades. 

Align blades so that one set 

represents a (+) and the 

other an (x) when viewed 

from above. 

Sheared key. Check all keys in drive 

system. 

Loose clutch. Tighten clutch. 

Engine does not start. Engine problem. Consult engine manufacturer’s 

service manual.

CRT 48 Technical Data 

4. Technical Data 

4.1 Engine 

Engine power rating 

CRT 48-35V: Gross power rating per SAE J1995. 

CRT 48-31V / 34V: Net power rating per SAE J1349. 

CRT 48-35L: Net power rating per ISO 1585. 

Actual power output may vary due to conditions of specific use. 

Part No. CRT 48- 

35V 

0620112 

Engine 

wc_td000188gb.fm 43 

CRT 48- 

34V 

0620075 


31V 

0620476 


35L 

0620113 

Engine make Vanguard Lombardini 

Engine model A/C V-Twin DM950GH LDW1404 

Max. rated power @ 

rated speed 

Displacement 

kW 

(Hp) 

cm³ 

(in³) 

24.6 (35) 

@ 3600 rpm 

25.4 (34) 

@ 3600 rpm 

23 (31) 

@ 3600 rpm 

26 (34.9) 

@ 3600 rpm 

993 (61) 950 (58) 1372 (84) 

Spark plug type Champion RC12YC -- 

Electrode gap 

mm 

(in.) 

Operating speed rpm 3800 

Engine speed - idle rpm 1450 

0.76 (0.030) -- 

Battery V / size 12 / BCI G24 

Fuel type Regular unleaded gasoline Diesel 

Fuel tank capacity l (gal.) 24.6 (6.5) 

Fuel consumption 

l (gal.)/ 

hr. 

10 (2.6) 6.2 (1.7) 

Running time hrs. 2.5 4 

Clutch type Variable speed 

Engine oil capacity l (qt.) 2.3 (2.4) 3.3 (3.5) 5.2 (5.4) 

Engine lubrication 

oil 

grade 

SAE 30 SAE 10W30 SH, SJ 10W40

Technical Data CRT 48 

4.2 Trowel 

Part No. CRT 48- 

35V 

0620112 

Trowel 

wc_td000188gb.fm 44 


34V 

0620075 


31V 

0620476 


35L 

0620113 

Operating weight kg (lbs.) 508 (1130) 558 (1240) 603 (1340) 

Dimensions (L x W x H) 

mm 

(in.) 

2566 x 1295 x 1473 

(101 x 51 x 58) 

Rotor speed (range) rpm 25–165 

Blade pitch (range) degrees 0–25 

Gearbox type Heavy duty, fan cooled 

Gearbox lubrication type Mobil Glygoyle 460 

l (oz.) 1.83 (62) each 

Driveshaft type Splined universal joint 

Troweling width 

with pans 

(non-overlapping) 

without pans 


Troweling area 

with pans 


without pans 


mm 

(in.) 

Operation 

2465 (97) 

2413 (95) 

m 2 (ft 2 ) 3 (32) 

2.8 (30)

CRT 48 Technical Data 

4.3 Sound and Vibration Specifications 

The required sound specifications, per Annex VIII, Directive 2000/14/ 

EC of the EC-Machine Regulations, are: 

-the sound pressure level at operator’s location (LpA ): 

91.1 dB(A) (CRT 48-35L) 

93.5 dB(A) (CRT 48-35V) 

96.3 dB(A) (CRT 48-34V and CRT 48-31V) 

-the guaranteed sound power level (LWA ): 

110.2 dB(A) (CRT 48-35L and CRT 48-35V) 

112.8 dB(A) (CRT 48-34V and CRT 48-31V) 

These sound values were determined according to ISO 3744 for the 

sound power level (LWA ) and ISO 11204 for the sound pressure level 

(LpA ) at the operator’s location. 

The weighted effective acceleration value, determined according to 

EN 1033 and ISO 2631, is: 

-for whole body: 

0.274 m/s2 (CRT 48-35L) 

0.381 m/s2 (CRT 48-35V) 

0.208 m/s2 (CRT 48-34V and CRT 48-31V) 

-for hand/arm: 

1.37 m/s2 (CRT 48-35L) 

1.54 m/s2 (CRT 48-35V) 

1.31 m/s2 (CRT 48-34V and CRT 48-31V) 

The sound and vibration specifications were obtained with the unit 

operating on fully cured, water wetted concrete at nominal engine 

speed. 

wc_td000188gb.fm 45

Trowel.qxd 11/24/04 10:18 AM Page 1 

SAFETY ALERT SYMBOL 

! 

This Safety Alert Symbol means 

ATTENTION is required! 

The Safety Alert Symbol identifies important safety 

messages on machines, safety signs, in manuals 

or elsewhere. When you see this symbol, be alert 

to the possibility of personal injury or death. Follow 

the instructions in the safety message. 

AEM Safety Manuals are protected as a copyrighted work with 

ownership duly registered with the Copyright Office, 

Washington, D.C. Any reproduction, translation, decompiling or 

other use of an AEM Safety Manual, or portion thereof, or the 


2 

WORD OF EXPLANATION 

U.S. Department of Labor publishes Safety and 

Health Regulations and Standards under the 

authority of the Occupational Safety and Health Act 

for the General Construction and Mining Industries. 

Its address is: U.S. Department of Labor, 

Washington, DC 20210 (www.OSHA.gov and 

www.MSHA.gov). 

ANSI – American National Standards Institute, c/o 

The American Society of Mechanical Engineers, 

United Engineering Center, 345 East 47th Street, 

New York, NY 10017 (www.ANSI.org). 

Why is SAFETY important to YOU? 

3 BIG REASONS 

• Accidents KILL or DISABLE 

• Accidents COST 

• Accidents CAN BE AVOIDED 

NOTICE OF COPYRIGHT PROTECTION 

The following is a partial list of reference material on safe operating practices: 

creation of derivative works based on an AEM Safety Manual, 

without the prior written approval of AEM is expressly prohibited. 

Copyright infringement can result in civil and criminal sanctions, 

damages and other penalties being imposed. 

Copyright © 2003 – Association of Equipment Manufacturers 

ISO – International Standards Organization, 

1, rue de Varembe Case postale 56, CH-1211 

Geneva 20, Switzerland (www.ISO.ch). 

SAE – Society of Automotive Engineers, Inc., 

400 Commonwealth Drive, Warrendale, PA 15096, 

publishes a list, “Operator Precautions” SAE J153 

MAY 87 (www.SAE.org). 

AEM – Association of Equipment Manufacturers, 

111 East Wisconsin Avenue, Milwaukee, WI 53202 

(www.AEM.org). 

1



4 

FOREWORD 

TABLE OF CONTENTS 

Page 

WORD OF EXPLANATION ................................................................2 

FOREWORD........................................................................................4 

A WORD TO THE USER ....................................................................5 

FOLLOW A SAFETY PROGRAM ......................................................6 

PREPARE FOR SAFE OPERATION ..................................................7 

START SAFELY ................................................................................11 

WORK SAFELY ................................................................................13 

SHUT DOWN SAFELY ......................................................................15 

LOAD AND UNLOAD SAFELY ........................................................16 

PERFORM MAINTENANCE SAFELY ..............................................17 

TEST YOUR KNOWLEDGE ..............................................................22 

A FINAL WORD TO THE USER........................................................23 

This safety manual is intended to point out some of 

the basic situations which may be encountered 

during the normal operation and maintenance of 

your walk-behind or ride-on concrete power trowel 

and to suggest possible ways of dealing with these 

conditions. 

Additional precautions may be necessary, 

depending on application and attachments used 

and conditions at the work site or in the 

maintenance area. 

The trowel manufacturer has no direct control over 

machine application, operation, inspection, 

lubrication, or maintenance. Therefore, it is your 

responsibility to use good safety practices in these 

areas. 

Do not use the trowel for any purpose other than its 

intended purposes or applications. 

The information provided in this manual 

supplements the specific information about your 

machine and its application that is contained in the 

manufacturer’s manual(s). 

Other information which may affect the safe 

operation of your machine may be displayed on 

safety signs, or in insurance requirements, 

employer’s safety programs, safety codes, local, 

state/provincial, and federal laws, rules, and 

regulations. 

If you do not understand any of this information, or 

if errors or contradictions seem to exist, consult 

with your supervisor before operating your trowel! 

IMPORTANT: If you do not have the 

manufacturer’s manual(s) for your particular 

machine, get a replacement manual from your 

employer, equipment dealer, or manufacturer of 

your machine. Keep this safety manual and the 

manufacturer’s manual(s) accessible to the 

operator and maintenance personnel. 

3


Remember that YOU are the key to safety. Good 

safety practices not only protect you but also 

protect the people around you. It is your 

responsibility to study this manual and the 

manufacturer’s manual(s) for your specific machine 

before operating your machine. Make them a 

working part of your safety program. Keep in mind 

that this safety manual is written for concrete power 

trowels only. Practice all other usual and customary 

safe working precautions, and above all – 

REMEMBER – SAFETY IS UP TO YOU 

YOU CAN PREVENT SERIOUS 

INJURY OR DEATH 


6 

FOLLOW A SAFETY PROGRAM 

EQUIPMENT/CLOTHING 

Consult your supervisor for specific instructions on 

a job, and the personal safety equipment required. 

For instance, you may need: 

• Hard Hat 

• Heavy Gloves 

• Eye Protection 

• Ear Protectors 

• Safety Shoes 

• Dust Mask or Respirator 

A WORD TO THE USER 

Do not wear loose clothing or any accessory – 

flopping cuffs, dangling neckties and scarves, or 

jewelry – that can catch in moving parts. 

DUST PRECAUTION 

Some dust created by construction activities may 

cause silicosis or respiratory harm. 

Your risk of exposure varies depending on how 

often you do this type of work. To reduce your risk, 

work in a well ventilated area, use a dust control 

system, and wear approved personal safety 

equipment such as a dust/particle respirator 

designed to filter out microscopic particles. 

5


LEARN TO BE SAFE 

• Read the operator’s 

manual. If one has not 

been provided, get one and 

study it before operating 

the equipment. 

• Learn the location and 

understand the functions of 

all controls before 

attempting to operate the 

equipment. 

• Know the meaning of all identification symbols on 

the controls and gauges. 

• Check to determine that the manufacturer’s 

furnished safety warning labels are securely 

attached to the trowel and all warnings can 

clearly read. Replace labels and decals if they 

are missing or become worn or unreadable. 

• Know the location and type of emergency shutdown 

control the trowel is equipped with. 

• Never start or operate the trowel without 

protective guards and panels in place. 

• Know the capabilities and limitations of the 

trowel. 


8 

PREPARE FOR SAFE OPERATION 

PRE-OPERATIONAL CHECKS 

Walk around the trowel. Carefully inspect for 

evidence of physical damage, such as cracks, 

bends, or deformation of plates and welds. Check 

for loose, broken or missing parts on the trowel, 

including brackets, vibration isolators, nuts and 

bolts. Hardware should be replaced with original 

equipment manufacturer’s (OEM) parts, and should 

be properly tightened to the manufacturer’s 

recommendations. 

Remove all trash and debris from the trowel. Make 

sure oily rags, leaves, or other flammable material 

are removed and not stored on the trowel. Avoid 

potential fire hazards! 

Clean all oil or grease 

from operator areas such 

as control handles, foot 

pedals, or platforms to 

prevent slipping. 

Check for fuel, oil, and 

hydraulic fluid leaks. All 

leaks must be corrected 

before the trowel is 

operated. 


SAFETY DEVICES 

Know what safety devices your trowel is equipped 

with … and see that each item is securely in place 

and in operating condition. 

For example: 

• Emergency stop switch or other “Shut-Down” 

devices 

• Guards, Shields & Panels 

• Alarms or Warning Lamps 

• Drain Covers, Plugs, and Caps 

• Pressure Relief Devices 

• Lights 

Inspect all hydraulic hoses for cracks or signs of 

wear and replace if necessary. Secure all caps and 

filler plugs for all systems. 

Always use a a flashlight or shielded trouble light 

when checking for leaks – never use an open 

flame. Never check for hydraulic leaks with your 

hand. Hydraulic systems are under high pressure 

and leaks in these systems can penetrate the skin 

which can result in serious injury or even death. 

Always use a piece of cardboard or wood when 

looking for hydraulic leaks. 

Be sure the trowel is 

properly lubricated. See 

that the fuel, lubricating oil, 

coolant and hydraulic 

reservoirs are filled to the 

proper levels with the 

correct fluids according to 

the manufacturer’s 

instructions and 

recommendations. 

7


FIRE PREVENTION 

Always stop the engine and allow it to cool before 

refueling. 

Never refuel – 

• When engine is running 

• Near open flame or sparks 

• While smoking 

• In poorly ventilated areas 

Never overfill fuel tanks or fluid reservoirs. In the 

event of a fuel spill, do not attempt to start the 

engine until the fuel residue has been completely 

wiped up, and the area surrounding the engine is 

dry. Replace fuel cap securely after refueling. 


10 


CHECK THE AREA 

Thoroughly check the area for unusual or 

dangerous conditions, such as tools, or items that 

may damage the trowel or be propelled by the 

trowels rotating blades. Note where pipes and 

forms are located. Locate and mark protrusions 

(rebar, anchor bolts, floor drains, etc.) in the 

concrete. 

GETTING ON AND OFF A RIDE-ON TROWEL 

If operating a ride-on trowel, mount and dismount 

carefully. Use the steps and hand holds provided. 

Do not use control levers as hand holds and never 

use guard rings as steps. Watch for surfaces that 

may be slippery. Never jump off a ride-on trowel. 


Inspect electrical wiring for damage or wear. 

Batteries produce explosive gas. Keep open flame 

or sparks away. 

In case of accident or fire, be ready to act quickly, 

yet calmly. Do not panic. Knowing ahead of time 

where to locate a first aid kit, fire extinguisher, or to 

get assistance will help should an emergency 

situation come up. 

CHECK THE WORK AREA 

Learn – beforehand – 

as much about your 

working area as 

possible. 

Be observant of other 

workers, bystanders 

and other machinery 

in the area. Keep all 

unauthorized, 

untrained people and 

children out of the 

area while the trowel 

is in operation. 

OPERATING ON AN ELEVATED DECK 

(MULTI-STORY OPERATION) 

Consult local/state regulations before you operate 

equipment on an elevated deck. If operating on an 

elevated deck, ensure perimeter safety cabling of 

proper size and strength is in place. Do not operate 

the trowel close to the edge of the deck. 

TRANSPORTING THE TROWEL 

Never transport the trowel with float pans attached 

unless safety catches are used and are specifically 

cleared for such transport by the manufacturer. 

Under no circumstances hoist the trowel more than 

three feet off the ground with float pans attached. 

Always consult the manufacturer’s operation 

manual for specific information on transporting the 

trowel. 

9


START CORRECTLY – START SAFELY 

Before starting, check for proper functioning of all 

operation and shutdown controls. Check all 

controls to be sure they are in the correct startup 

position. Know the proper starting procedure for 

your trowel. Follow the manufacturer’s operational 

instructions. 

WALK-BEHIND TROWELS 

• Ensure that the operator is familiar with the 

trowel and is trained on its operation. 

• Ensure the operator is well rested, not fatigued, 

is alert, and not impaired in any way 

(medications, drugs, alcohol, etc.). 

• Do not start or operate the trowel if the drive train 

will not disengage. Centrifugal force between the 

trowel and surface when starting can cause 

uncontrolled handle movement that can cause 

serious injury. The handle must not move while 

pulling the engine recoil starter. 

• Visually check to be sure that the blades are free 

of obstructions and the area is clear for 

operation. 


12 

START SAFELY 

RIDE-ON TROWELS 

• Ensure that the operator is familiar with the 

trowel and is trained on its operation. 

• Ensure the operator is well rested and not 

fatigued, is alert, and not impaired in any way 

(medications, drugs, alcohol, etc.). 

• Adjust the seating if necessary and get into a 

comfortable position where all controls are 

accessible. 

• Visually check to be sure that the blades are free 

of obstructions and the area is clear for 

operation. 

• Start the trowel following the instructions in the 

engine manufacturer’s operation manual. For 

diesel powered trowels, follow the instructions for 

glow plug and cold start operation. 

START SAFELY 

• For trowels that use this feature, ensure that the 

emergency stop switch is in the ON position. 

• Move the throttle to the idle position. 

• Switch the engine ON/OFF switch to the ON 

position. 

• Never place your foot on the ring guard when 

starting the engine or severe injury can occur if 

your foot slips through the ring guard as the 

blades start to spin. 

• While firmly holding the handle with one hand, 

start the engine following the guidelines in the 

engine manufacturer’s instruction manual. 

• Hold the handle bar firmly with both hands while 

the trowel is “throttled-up”. 

• If control of the trowel is lost, stay clear and do 

not attempt to regain control until the trowel has 

stopped moving. Depending on the engine 

speed, the trowel handle can swing around 

before it stops completely. 

• You are ready to operate the trowel! 

• Observe any gauges and warning lights to 

ensure they are functioning and their readings 

are within the manufacturer’s normal operating 

range. 

• Check operation of controls. Make certain they 

operate properly. 

• You are ready to operate the trowel! 

11


SAFE WORKING PROCEDURES 

DANGER – CARBON MONOXIDE 

Exhaust from the engine contains 

poisonous carbon monoxide gas 

that is not easily detected as it is 

colorless and odorless. Exposure 

to carbon monoxide can cause 

loss of consciousness and may 

lead to death! Do not operate 

your trowel indoors or in an enclosed area unless 

adequate ventilation is provided. Ensure that 

permissible carbon monoxide levels are monitored 

and not exceeded. 

OTHER PRECAUTIONS 

• Never leave the trowel unattended while it is 

running. 

• Always keep clear of rotating or moving parts. 

• Never use additional weights other than the 

weights recommended by the manufacturer. The 

use of unauthorized weights could lead to 

personal injury or damage to the trowel. 


14 

WORK SAFELY 

ELECTRICAL EQUIPMENT 

Some walk-behind trowels are powered by electric 

motors. Electric motors and components present 

special hazards during operation. Read the 

operator’s manual. 

• Never operate a trowel with a damaged or worn 

electrical cord. When using an extension cord, be 

sure to use one heavy enough to carry the 

current load. When trowel is used outdoors, use 

only extension cords that are marked for outdoor 

use. 

• Use only appropriate 

extension cords that have 

grounding-type plugs and 

receptacles that accept the 

machine’s plug. 

WORK SAFELY 

• Never fill the fuel tank while the engine is 

running. Turn the engine off and allow it to cool 

before refueling. 

• The muffler, exhaust pipes and 

other engine parts will become 

hot during operation and will 

remain hot for a while after 

shutdown. Do not touch until 

allowed to sufficiently cool. Do 

not allow debris, rags, paper, or 

leaves to accumulate around 

these areas. 

• Do not keep tools, buckets, loose materials on 

the trowel while it is running and never allow 

anyone other than the operator on or near the 

trowel while it is in operation. 

• Do not use the trowel for any purpose other than 

its intended purposes or applications. 

• Keep all electrical cords away from rotating 

elements, heat, oil, and sharp edges to avoid 

damaging them. 

• Avoid body contact with grounded surfaces such 

as pipes, metal railings, radiators and metal 

ductwork. 

• Always check the power supply before running 

the trowel. Using the wrong voltage supply will 

damage the motor. 

• Always make sure the motor switch is OFF or in 

the stop position before plugging the trowel into 

the power supply. 

• Do not operate an electric powered trowel in the 

rain or snow. Keep the motor, switch, and 

electrical cords dry. 

• Never operate the trowel in areas exposed to 

flammable or explosive liquids or gases. Sparks 

could ignite fumes. 

13


SHUT DOWN PROCEDURES 

Never disable or disconnect the safety devices! 

Always close fuel valves when the machine is not 

being used. 

Refer to the manufacturer’s manuals for specific 

shut down procedures. 


16 

LOAD AND UNLOAD SAFELY 

PRECAUTIONS 

• Power trowels are heavy and awkward to move 

around. 

• Do not attempt to lift the ride-on trowel by the 

guard rings. 

• Use proper heavy lifting procedures. 

• Keep all non-essential personnel clear of the 

area. 

• Never hoist the trowel over areas where people 

are standing or working. 

• Remove tools and loose items before lifting. 

• Make sure the crossbars on the safety catches 

are in good condition if so equipped. 

• Always consult your operator’s manual for the 

best and proper lifting, loading, and unloading 

methods. 

WALK-BEHIND TROWELS 

Some walk-behind trowels can be lifted or moved 

by two people utilizing lifting tubes or other special 

attachments. Generally however, they must be 

SHUT DOWN SAFELY 

lifted using lifting bales (special lifting brackets), or 

other specific lifting points provided by the 

manufacturer, and cranes, hoists, or forklifts. Be 

certain any lifting devices used have adequate 

capacity. 

RIDE-ON TROWELS 

Ride-on trowels are very heavy. They require 

heavy-duty lifting devices such as cranes or heavyduty 

hoists to lift them on and off the concrete slab. 

Be certain any lifting devices used have adequate 

capacity. Some ride-on trowels are equipped with 

lifting bosses that are used with specialized 

apparatus to assist in moving the trowels around. 

Use extreme care when lifting or moving a ride-on 

trowel. 

STORAGE 

Always store equipment properly when it is not 

being used. Equipment should be stored in a clean, 

dry location out of reach of children. 

15


SERVICE AND MAINTENANCE SAFETY 

Poorly maintained equipment 

can become a safety hazard! In 

order for your trowel to operate 

safely and properly over a long 

period of time, periodic 

maintenance and occasional 

repairs are necessary. 

Do not attempt to clean, 

service, or perform adjustments 

on the trowel while it is running. 


18 

GOOD 

HOUSEKEEPING 

Keep area clean 

and dry if possible. 

Oily and wet 

surfaces are 

slippery; greasy 

rags are a fire 

hazard; wet spots 

are dangerous 

around electrical 

equipment. 

PERFORM MAINTENANCE SAFELY 

FORM GOOD DRESS HABITS 

Loose clothing and jewelry can catch in moving 

parts and cause serious injury. 

Keep hands – and clothing – away from moving 

parts. 

GUARDS AND SAFETY DEVICES 

After performing maintenance make certain all 

guards and panels have been reinstalled and all 

safety devices are functional. 

BATTERY MAINTENANCE 

Always wear eye and face 

protection. 

Batteries produce explosive gases. 

Keep open flame or sparks away. 

See the manufacturer’s instructions 

when servicing the batteries, when 

using jumper cables, or when using 

a battery charger. 


GENERAL PROCEDURES 

Do not perform any work on the trowel unless you 

are authorized to do so. 

Standard maintenance procedures should always 

be observed. Read the manufacturer’s manual or 

find assistance if you do not understand what you 

are doing. 

Maintenance can be dangerous unless performed 

properly. Be certain that you have the necessary 

skill and information, correct tools and equipment 

to do the job correctly. 

Attach a Do Not Operate tag or 

similar warning tag to the 

control panel (or handle on 

walk-behind trowels), and 

disconnect the battery 

(disconnect the spark plug wire 

on walk-behind trowels), before 

performing maintenance on the 

machine. 

Disconnect the electric cord on 

electrical machines. 

Use a flashlight to check battery 

electrolyte level. Always check 

with engine stopped. 

Battery electrolyte is poisonous. 

It is strong enough to burn your 

skin, eat holes in clothing, and 

can cause blindness if splashed 

into eyes. Always wear eye and 

face protection. 

Flush any contacted area with water immediately. 

17


FIRE PREVENTION 

Avoid fire hazards. 

Always stop the engine and allow it to cool before 

you refuel the trowel. Do not refuel while smoking 

or near open flame or sparks. Never overfill fuel 

tanks or fluid reservoirs. 

Remove all trash or debris. Make sure oily rags or 

other flammable materials are not stored on or in 

the trowel. 

Check for fuel, oil, or hydraulic fluid leaks. Repair 

the leaks and clean the machine before you 

operate it. 

Inspect electrical wiring or worn or frayed 

insulation. Install new wiring if wires are damaged. 

Do not weld or flame cut on pipes, tubes, or tanks 

that contain flammable fluids or gases. 

Ether and starting fluid is flammable. Do not smoke 

when using. Always follow the instructions on the 

can and in the manufacturer’s manual for your 

trowel. 

Always use a safe, nonflammable solvent when 

you clean parts. Do not use flammable fluids or 

fluids that give off harmful vapors. 


20 


EXHAUST FUMES 

Engine exhaust fumes can 

cause sickness or death. 

When performing 

maintenance, if it is 

necessary to run an engine 

in an enclosed area, remove 

the exhaust fumes from the 

area when an exhaust pipe extension. If you do not 

have an exhaust pipe extension, make sure you 

open the doors and get outside air into the area. 

Ensure that permissible carbon monoxide levels 

are monitored and not exceeded. 

FLUID SIPHONING 

Never siphon gasoline or hydraulic fluid using a 

hose and suction by mouth. Ingestion of these 

fluids even in small amounts will require immediate 

medical attention and can cause death. 


Store all flammable fluids and materials away from 

your work area. 

Whenever the sparkplug is removed, do not test for 

spark on gasoline powered engines if engine is 

flooded or the smell of gasoline is present. A stray 

spark could ignite fumes. 

Know where fire extinguishers are kept – how they 

operate – and for what type of fire they are 

intended! 

Check readiness of fire suppression systems and 

fire detectors (is so equipped). 

COOLING SYSTEM 

Maintain the cooling system 

according to the 

manufacturer’s instructions. 

Hot coolant can spray out 

and you can be burned if you 

improperly maintain or 

service the cooling system. 

Remove filler cap only when 

cool. 

19


TROWEL BLADES AND PANS 

• Do not attempt to clean, service or perform 

adjustments on the trowel while it is running. 

• Do not remove while the trowel is hanging 

overhead. Always support the trowel securely on 

a flat, level surface before changing blades or 

pans. 

• Always handle blades and pans carefully. Worn 

blades or pans may develop sharp edges that 

can cause serious cuts. 

• Always replace worn or damaged parts with 

service parts designated by the manufacturer. 

• Replace blades and pans as a complete set – 

even if only one blade or pan is showing wear or 

damage. They can wear differently depending on 

different jobs, and a difference in blade size will 

damage the finish of the slab surface. 


22 

TEST YOUR KNOWLEDGE 

Do you understand this AEM manual and items 

such as – 

• Your safety program? 

• Your trowel manufacturer’s manual(s)? 

• Proper clothing and personal safety equipment? 

• Your trowel’s controls, warning signs and 

devices, and safety equipment? 

• Proper trowel lifting and moving procedures? 

• How to inspect and start your trowel? 


HYDRAULIC SYSTEMS 

Hydraulic fluid systems operate under high 

pressure. Even a small leak can have enough force 

to penetrate the eyes or skin. If injury occurs, seek 

immediate medical treatment by a physician 

familiar with injuries that are caused by hydraulic oil 

escaping under pressure. 

Use a piece of wood or cardboard to find hydraulic 

oil leaks. Do not use your bare hands. 

Wear safety glasses to prevent injuries to the eyes. 

• How to check your trowel for proper operation? 

• Proper working procedures? 

• Proper shut down procedures? 

• Your work area and any special hazards that 

may exist? 

• Under what conditions you should not operate 

your trowel? 

If you do not understand any of these items, 

consult with your supervisor before operating your 

trowel. 

21


Remember that YOU are the key to safety. Good 

safety practices not only protect you but protect the 

people around you. 

You have read this safety manual and the 

manufacturer’s manual(s) for your specific trowel. 

Make them a working part of your safety program. 

Keep in mind that this safety manual is written for 

only this type of machine. 

Practice all other usual and customary safe 

working precautions, and above all – 

REMEMBER – SAFETY IS UP TO YOU 

YOU CAN PREVENT SERIOUS 

INJURY OR DEATH 


A FINAL WORD TO THE USER 

23

AEM_ConcretePowerTrowel.qxd 7/23/03 6:31 AM Page 1

2008-CE-CRT36_CRT48-Q.fm 

Date / Datum / Fecha / Date 

EC DECLARATION OF CONFORMITY 

CE-KONFORMITÄTSERKLÄRUNG 

DECLARACIÓN DE CONFORMIDAD DE LA CE 

DÉCLARATION DE CONFORMITÉ C.E. 

WACKER NEUSON CORPORATION, N92 W15000 ANTHONY AVENUE, MENOMONEE FALLS, WISCONSIN USA 

AUTHORIZED REPRESENTATIVE IN THE EUROPEAN UNION 

BEVOLLMÄCHTIGTER VERTRETER FÜR DIE EUROPÄISCHE GEMEINSCHAFT 

REPRESENTANTE AUTORIZADO EN LA UNIÓN EUROPEA 

REPRÉSENTANT AGRÉÉ AUPRÈS DE L’UNION EUROPÉENNE 

hereby certifies that the construction equipment specified hereunder / bescheinigt, daß das Baugerät / certifica que la máquina de 

construcción / atteste que le matériel : 

1. Category / Art / Categoría / Catégorie 

2. Type - Typ - Tipo - Type 

Ride-On Trowels 

Besitzbare Flügelglätter 

Alisadoras Dobles 

Truelles auto portées 

CRT 36, CRT 48 

3. Item number of equipment / Artikelnummer / Número de referencia de la máquina / Numéro de référence du matériel : 

0620080, 0620299, 0620115, 0620295, 0620112, 0620075, 0620113, 0620476 

has been produced in accordance with the following standards: 

in Übereinstimmung mit folgenden Richtlinien hergestellt worden ist: 

ha sido fabricado en conformidad con las siguientes normas: 

a été produit conforme aux dispositions des directives européennes ci-après : 

98/37/EC 

89/336/EC 

pr EN 12649 

21.07.08 

WACKER CONSTRUCTION EQUIPMENT AG 

Preußenstraße 41 

80809 München 

William Lahner Robert Motl 

Vice President of Engineering Manager, Product Engineering 

WACKER NEUSON CORPORATION

Wacker Construction Equipment AG · Preußenstraße 41 · D-80809 München · Tel.: +49-(0)89-3 54 02 - 0 · Fax: +49 - (0)89-3 54 02-3 90 

Wacker Neuson Corporation · P.O. Box 9007 · Menomonee Falls, WI 53052-9007 · Tel. : (262) 255-0500 · Fax: (262) 255-0550 · Tel. : (800) 770-0957 

Wacker Asia Pacific Operations · Skyline Tower, Suite 2303, 23/F · 39 Wang Kwong Road, Kowloon Bay, Hong Kong · Tel. +852 2406 60 32 · Fax: +852 2406 60 21

CRT 48 Operation - Wacker Neuson

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