Wacker Neuson BS50-4HO EU Manuel utilisateur

0170872en 001 0610

Operator’s Manual

Rammer

BS 50-4s

0170872EN

Copyright

notice

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

This publication may be photocopied by the original purchaser of the machine. Any

other type of reproduction is prohibited 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. Violators will be prosecuted.

Trademarks

All trademarks referenced in this manual are the property of their respective owners.

Manufacturer

Wacker Neuson Corporation

N92W15000 Anthony Avenue

Menomonee Falls, WI 53051 U.S.A.

Tel: (262) 255-0500 · Fax: (262) 255-0550 · Tel: (800) 770-0957

www.wackerneuson.com

Original

instructions

This Operator’s Manual presents the original instructions. The original language of this

Operator’s Manual is American English.

Foreword

wc_tx001537gb.fm 3

Foreword

Machines

covered by

this manual

Machine

documentation

 Keep a copy of the Operator’s Manual with the machine at all times.

 Use the separate Parts Book supplied with the machine to order replacement

parts.

 Refer to the separate Repair Manual for detailed instructions on servicing and

repairing the machine.

 If you are missing any of these documents, please contact Wacker Neuson

Corporation to order a replacement or visit www.wackerneuson.com.

 When ordering parts or requesting service information, be prepared to provide

the machine model number, item number, revision number, and serial number.

Expectations

for

information in

this manual

 This manual provides information and procedures to safely operate and main-

tain the above Wacker Neuson model(s). For your own safety and to reduce the

risk of injury, carefully read, understand, and observe all instructions described

in this manual.

 Wacker Neuson Corporation expressly reserves the right to make technical

modifications, even without notice, which improve the performance or safety

standards of its machines.

 The information contained in this manual is based on machines manufactured

up until the time of publication. Wacker Neuson Corporation reserves the right

to change any portion of this information without notice.

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.

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 dis-

charge 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.

Manufacturer’s

approval

This manual contains references to approved parts, attachments, and modifica-

tions. The following definitions apply:

 Approved parts or attachments are those either manufactured or provided by

Wacker Neuson.

Machine Item Number Rev

BS 50-4s 0620071 209 and above

0620811 208 and above

Foreword

4 wc_tx001537gb.fm

 Approved modifications are those performed by an authorized Wacker Neu-

son service center according to written instructions published by Wacker Neu-

son.

 Unapproved parts, attachments, and modifications are those that do not

meet the approved criteria.

Unapproved parts, attachments, or modifications may have the following conse-

quences:

 Serious injury hazards to the operator and persons in the work area

 Permanent damage to the machine which will not be covered under warranty

Contact your Wacker Neuson dealer immediately if you have questions about

approved or unapproved parts, attachments, or modifications.

BS 50-4s Table of Contents

wc_bo0170872en_001TOC.fm 5

Foreword 3

1 Emission Control System Information 7

2 Safety Information 14

2.1 Signal Words Used in this Manual ..................................................... 14

2.2 Machine Description and Intended Use ............................................. 15

2.3 Safety Guidelines for Operating the Machine ..................................... 16

2.4 Operator Safety while Using Internal Combustion Engines ............... 18

2.5 Service Safety .................................................................................... 19

3 Labels 22

3.1 Label Locations .................................................................................. 22

3.2 Label Meanings .................................................................................. 23

4 Lifting and Transporting 27

4.1 Lifting and Transporting ...................................................................... 27

5 Operation 28

5.1 Preparing the Machine for First Use ................................................... 28

5.2 Recommended Fuel ........................................................................... 28

5.3 Position of the Operator ..................................................................... 29

5.4 Before Starting ................................................................................... 30

5.5 Starting ............................................................................................... 30

5.6 Stopping ............................................................................................. 31

5.7 Emergency Shutdown Procedure ....................................................... 31

5.8 Low Oil Shutoff Switch ....................................................................... 32

Table of Contents BS 50-4s

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6 Maintenance 33

6.1 Periodic Maintenance Schedule ..........................................................33

6.2 Servicing the Air Cleaner .....................................................................34

6.3 Engine Oil ............................................................................................35

6.4 Checking and Changing the Ramming System Oil .............................36

6.5 Shoe Hardware ...................................................................................38

6.6 Long-Term Storage .............................................................................39

7 Basic Troubleshooting 41

8 Technical Data 43

8.1 Rammer ...............................................................................................43

8.2 Sound Measurements .........................................................................44

8.3 Vibration Measurements .....................................................................44

8.4 Dimensions ..........................................................................................44

Emission Control System Information

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1 Emission Control System Information

Source of Emissions

The combustion process produces carbon monoxide, oxides of

nitrogen, and hydrocarbons. Control of hydrocarbons and oxides of

nitrogen is very important because, under certain conditions, they

react to form photochemical smog when subjected to sunlight. Carbon

monoxide does not react in the same way, but it is toxic.

Wacker Neuson utilizes lean carburetor settings and other systems to

reduce the emissions of carbon monoxide, oxides of nitrogen, and

hydrocarbons.

The U.S. and California Clean Air Acts

EPA and California regulations require all manufacturers to furnish

written instructions describing the operation and maintenance of

emission control systems.

The following instructions and procedures must be followed in order to

keep the emissions from your Wacker Neuson engine within the

emissions standards.

Tampering and Altering

Tampering with or altering the emission control system may increase

emissions beyond the legal limit. Among those acts that constitute

tampering are:

•Removal or alteration of any part of the intake, fuel, or exhaust

systems.

•Altering or defeating the speed-adjusting mechanism to cause the

engine to operate outside its design parameters.

Problems That May Affect Emissions

If you are aware of any of the following symptoms, have your engine

inspected and repaired by your servicing dealer.

•Hard starting or stalling after starting.

•Rough idle.

•Misfiring or backfiring under load.

•Afterburning (backfiring).

•Black exhaust smoke or high fuel consumption.

Emission Control System Information

8 wc_tx000369gb.fm

Replacement Parts

The emission control systems on your Wacker Neuson engine were

designed, built, and certified to conform with EPA and California

emissions regulations. We recommend the use of genuine Wacker

Neuson parts whenever you have maintenance done. These original-

design replacement parts are manufactured to the same standards as

the original parts, so you can be confident of their performance. The

use of replacement parts that are not of the original design and quality

may impair the effectiveness of your emission control system.

A manufacturer of an aftermarket part assumes the responsibility that

the part will not adversely affect emission performance. The

manufacturer or rebuilder of the part must certify that use of the part

will not result in a failure of the engine to comply with emission

regulations.

Maintenance

Follow the maintenance schedule. Remember that this schedule is

based on the assumption that your machine will be used for its

designed purpose. Sustained high-load or high-temperature operation,

or use in unusually wet or dusty conditions, will require more frequent

service.

OXYGENATED FUELS

Some conventional gasolines are being blended with alcohol or an

ether compound. These gasolines are collectively referred to as

oxygenated fuels. To meet clean air standards, some areas of the

United States and Canada use oxygenated fuels to help reduce

emissions.

If you use an oxygenated fuel, be sure it is unleaded and meets the

minimum octane rating requirement.

Before using an oxygenated fuel, try to confirm the fuel’s contents.

Some States / Provinces require this information to be posted on the

pump.

The following are EPA-approved percentages of oxygenates:

ETHANOL - (ethyl or grain alcohol) 10% by volume. You may use

gasoline containing up to 10% ethanol by volume. Gasoline containing

ethanol may be marketed under the name “Gasohol”. E85 fuel should

never be used, as it is an alternative fuel containing 85% ethanol, 15%

gasoline.

MTBE - (methyl tertiary butyl ether) 15% by volume. You may use

gasoline containing up to 15% MTBE by volume.

Emission Control System Information

wc_tx000369gb.fm 9

METHANOL - (methyl or wood alcohol) 5% by volume. You may use

gasoline containing up to 5% methanol by volume, as long as it

contains cosolvents and corrosion inhibitors to protect the fuel system.

Gasoline containing more than 5% methanol by volume may cause

starting and/or performance problems. It may also damage metal,

rubber, and plastic parts of your fuel system.

If you notice any undesirable operating symptoms, try another service

station, or switch to another brand of gasoline.

Fuel system damage or performance problems resulting from the use

of an oxygenated fuel containing more than the percentages of

oxygenates mentioned above are not covered under warranty.

Emission Control System Information

10 wc_tx000369gb.fm

EMISSIONS COMPONENT DEFECT WARRANTY COVERAGE

This emission warranty is applicable in all States.

Wacker Neuson Corporation, N92 W15000 Anthony Avenue,

Menomonee Falls, WI 53051-1504, (herein "Wacker Neuson")

warrant(“s”) to the initial retail purchaser and each subsequent owner,

that this non-road engine (herein "engine") has been designed, built,

and equipped to conform at the time of initial sale to all applicable

regulations of the U.S. Environmental Protection Agency (EPA), and

that the engine is free of defects in materials and workmanship which

would cause this engine to fail to conform with EPA regulations during

its warranty period.

For the components listed under PARTS COVERED, the service

dealer authorized by Wacker Neuson will, at no cost to you, make the

necessary diagnosis, repair, or replacement necessary to ensure that

the engine complies with applicable U.S. EPA regulations.

EMISSISON COMPONENT DEFECT WARRANTY PERIOD

The warranty period for this engine begins on the date of sale to the

initial purchaser and continues for a period of 2 years.

Emission Control System Information

wc_tx000369gb.fm 11

PARTS COVERED

Listed below are the parts covered by the Emission Components

Defect Warranty. Some of the parts listed below may require

scheduled maintenance and are warranted up to the first scheduled

replacement point for that part.

(1) Fuel Metering System

(i) Carburetor and internal parts (and/or pressure regulator or fuel

injection system).

(ii) Air/fuel ratio feedback and control system, if applicable.

(iii) Cold start enrichment system, if applicable.

(iv) Regulator assembly (gaseous fuel, if applicable) .

(2) Air Induction System

(i) Intake manifold, if applicable.

(ii) Air filter.

(3) Ignition System

(i) Spark plugs.

(ii) Magneto or electronic ignition system.

(iii) Spark advance/retard system, if applicable.

(4) Exhaust manifold, if applicable

(5) Miscellaneous Items Used in Above Systems

(i) Electronic controls, if applicable.

(ii) Hoses, belts, connectors, and assemblies.

(iii) Filter lock assembly (gaseous fuel, if applicable).

Emission Control System Information

12 wc_tx000369gb.fm

OBTAINING WARRANTY SERVICE

To obtain warranty service, take your engine to the nearest authorized

Wacker Neuson service dealer. Bring your sales receipts indicating

date of purchase for this engine. The service dealer authorized by

Wacker Neuson will perform the necessary repairs or adjustments

within a reasonable amount of time and furnish you with a copy of the

repair order. All parts and accessories replaced under this warranty

become the property of Wacker Neuson.

WHAT IS NOT COVERED

• Conditions resulting from tampering, misuse, improper adjust-

ment (unless they were made by the service dealer authorized by

Wacker Neuson during a warranty repair), alteration, accident,

failure to use the recommended fuel and oil, or not performing

required maintenance services.

• The replacement parts used for required maintenance services.

• Consequential damages such as loss of time, inconvenience,

loss of use of the engine or equipment, etc.

• Diagnosis and inspection charges that do not result in warranty-

eligible service being performed.

• Any non-authorized replacement part, or malfunction of autho-

rized parts due to use of non-authorized parts.

OWNER'S WARRANTY RESPONSIBILITIES

As the engine owner, you are responsible for the performance of the

required maintenance listed in your owner's manual. Wacker Neuson

recommends that you retain all receipts covering maintenance on your

engine, but Wacker Neuson cannot deny warranty solely for the lack

of receipts or for your failure to ensure the performance of all

scheduled maintenance. As the engine owner, you should however be

aware that Wacker Neuson may deny warranty coverage if your

engine or a part has failed due to abuse, neglect, improper

maintenance or unapproved modifications.

You are responsible for presenting your engine to the nearest service

dealer authorized by Wacker Neuson when a problem exists.

If you have any questions regarding your warranty rights and

responsibilities, you should contact the WACKER NEUSON

CORPORATION Product Support Department (U.S.A. 1-800-770-

0957, Canada 1-877-977-0775) for the information.

Emission Control System Information

wc_tx000369gb.fm 13

THINGS YOU SHOULD KNOW ABOUT THE EMISSION CONTROL

SYSTEM WARRANTY:

MAINTENANCE AND REPAIRS

You are responsible for the proper maintenance of the engine. You

should keep all receipts and maintenance records covering the

performance of regular maintenance in the event questions arise.

These receipts and maintenance records should be transferred to

each subsequent owner of the engine. Wacker Neuson reserves the

right to deny warranty coverage if the engine has not been properly

maintained. Warranty claims will not be denied, however, solely

because of the lack of required maintenance or failure to keep

maintenance records.

MAINTENANCE, REPLACEMENT OR REPAIR OF EMISSION

CONTROL DEVICES AND SYSTEMS MAY BE PERFORMED BY

ANY REPAIR ESTABLISHMENT OR INDIVIDUAL; HOWEVER,

WARRANTY REPAIRS MUST BE PERFORMED BY A SERVICE

DEALER AUTHORIZED BY WACKER NEUSON. THE USE OF

PARTS THAT ARE NOT EQUIVALENT IN PERFORMANCE AND

DURABILITY TO AUTHORIZED PARTS MAY IMPAIR THE

EFFECTIVENESS OF THE EMISSION CONTROL SYSTEM AND

MAY HAVE A BEARING ON THE OUTCOME OF A WARRANTY

CLAIM.

If other than the parts authorized by Wacker Neuson are used for

maintenance replacements or for the repair of components affecting

emission control, you should assure yourself that such parts are

warranted by their manufacturer to be equivalent to the parts

authorized by Wacker Neuson in their performance and durability.

HOW TO MAKE A CLAIM

All repair qualifying under this limited warranty must be performed by

a service dealer authorized by Wacker Neuson. In the event that any

emission-related part is found to be defective during the warranty

period, you shall notify WACKER NEUSON CORPORATION Product

Support Department (U.S.A. 1-800-770-0957, Canada 1-877-977-

0775) and you will be advised of the appropriate warranty service

dealer or service providers where the warranty repair can be

performed.

Safety Information BS 50-4s

14 wc_si000403gb.fm

2 Safety Information

2.1 Signal Words Used in this Manual

This manual contains DANGER, WARNING, CAUTION, NOTICE, and

NOTE signal words which must be followed to reduce the possibility

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

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

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

Note: A Note contains additional information important to a procedure.

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

f Obey all safety messages that follow this symbol.

DANGER

DANGER indicates a hazardous situation which, if not avoided, will result in death

or serious injury.

f

To avoid death or serious injury from this type of hazard, obey all safety messages that

follow this signal word.

WARNING

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

death or serious injury.

f

To avoid possible death or serious injury from this type of hazard, obey all safety mes-

sages that follow this signal word.

CAUTION!

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

minor or moderate injury.

f

To avoid possible minor or moderate injury from this type of hazard, obey all safety mes-

sages that follow this signal word.

BS 50-4s Safety Information

wc_si000403gb.fm 15

2.2 Machine Description and Intended Use

This machine is a vibratory rammer. The Wacker Neuson Rammer

consists of a gasoline or diesel engine, a clutch, a fuel tank, a spring-

loaded ramming system, a ramming shoe, and a handle. The engine

transmits power through the ramming system and ramming shoe,

generating percussive impact force to compact soil. The operator

guides and controls the machine from behind using the handle.

This machine is intended to be used for compacting cohesive, mixed,

and granular soils in confined areas.

This machine has been designed and built strictly for the intended use

described above. Using the machine for any other purpose could

permanently damage the machine or seriously injure the operator or

other persons in the area. Machine damage caused by misuse is not

covered under warranty.

The following are some examples of misuse:

• Using the machine as a ladder, support, or work surface

• Using the machine to carry or transport passengers or equipment

• Using the machine as a hammer or for other demolition work

• Attaching the machine to any other machine

• Operating the machine outside of factory specifications

• Operating machine in a manner inconsistent with all warnings

found on the machine and in the Operator’s Manual

This machine has been designed and built in accordance with the

latest global safety standards. It has been carefully engineered to

eliminate hazards as far as practicable and to increase operator

safety through protective guards and labeling. However, some risks

may remain even after protective measures have been taken. They

are called residual risks. On this machine, they may include exposure

to:

• Heat, noise, exhaust, and carbon monoxide from the engine

• Fire hazards from improper refueling techniques

• Fuel and its fumes

• Personal injury from improper lifting techniques or operating

techniques

To protect yourself and others, make sure you thoroughly read and

understand the safety information presented in this manual before

operating the machine.

Safety Information BS 50-4s

16 wc_si000403gb.fm

2.3 Safety Guidelines for Operating the Machine

Operator qualifications

Only trained personnel are permitted to start, operate, and shut down

the machine. They also must meet the following qualifications:

• have received instruction on how to properly use the machine

• are familiar with required safety devices

The machine must not be accessed or operated by:

• children

• people impaired by alcohol or drugs

Operator training

Before operating the machine:

• Read and understand the operating instructions contained in all

manuals delivered with the machine.

• Familiarize yourself with the location and proper use of all

controls and safety devices.

• Contact Wacker Neuson Corporation for additional training if

necessary.

When operating this machine:

• Do not allow improperly trained people to operate the machine.

People operating the machine must be familiar with the potential

risks and hazards associated with it.

Personal Protective Equipment (PPE)

Wear the following Personal Protective Equipment (PPE) while

operating this machine:

• Close-fitting work clothes that do not hinder movement

• Safety glasses with side shields

• Hearing protection

• Safety-toed footwear

2.3.1 Never operate this machine in applications for which it is not intended.

2.3.2 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.

2.3.3 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.

2.3.4 Do not operate the machine with unapproved accessories or

attachments.

2.3.5 Never leave the machine running unattended.

BS 50-4s Safety Information

wc_si000403gb.fm 17

2.3.6 Never tamper with or disable the function of operating controls.

2.3.7 Never use the choke to stop the engine.

2.3.8 Never operate the machine in areas where explosions may occur.

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

before attempting to operate the machine.

2.3.10 Make sure that all other persons are at a safe distance from the

machine. Stop the machine if people step into the working area of the

machine.

2.3.11 Be sure operator is familiar with proper safety precautions and

operation techniques before using machine.

2.3.12 Always keep hands, feet, and loose clothing away from moving parts

of the machine.

2.3.13 Always use common sense and caution when operating the machine.

2.3.14 Always be sure the rammer will not tip over, roll, slide, or fall when not

being operated.

2.3.15 Always turn the engine OFF when the rammer is not being operated.

2.3.16 Always guide the rammer in such a way that the operator is not

squeezed between the rammer and solid objects. Special care is

required when working on uneven ground or when compacting coarse

material. Make sure to stand firmly when operating the machine under

such conditions.

2.3.17 When working near the edges of breaks, pits, slopes, trenches and

platforms, always operate the rammer in such a way that there is no

danger of it tipping over or falling in.

2.3.18 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.

2.3.19 Always operate machine with all safety devices and guards in place

and in working order. Do not modify or defeat safety devices. Do not

operate machine if any safety devices or guards are missing or

inoperative.

2.3.20 Do not transport the machine while it is running.

2.3.21 Do not tip the machine for cleaning or for any other reason.

Safety Information BS 50-4s

18 wc_si000403gb.fm

2.4 Operator Safety while Using Internal Combustion Engines

Operating safety

When running the engine:

• Keep the area around exhaust pipe free of flammable materials.

• Check the fuel lines and the fuel tank for leaks and cracks before

starting the engine. Do not run the machine if fuel leaks are present

or the fuel lines are loose.

When running the engine:

• Do not smoke while operating the machine.

• Do not run the engine near sparks or open flames.

• Do not touch the engine or muffler while the engine is running or

immediately after it has been turned off.

• Do not operate a machine when its fuel cap is loose or missing.

• Do not start the engine if fuel has spilled or a fuel odor is present.

Move the machine away from the spill and wipe the machine dry

before starting.

Refueling safety

When refueling the engine:

• Clean up any spilled fuel immediately.

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

• Replace the fuel tank cap after refueling.

• Do not smoke.

• Do not refuel a hot or running engine.

• Do not refuel the engine near sparks or open flames.

WARNING

Internal combustion engines present special hazards during operation and fueling. Failure to

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

f Read and follow the warning instructions in the engine owner’s manual and the

safety guidelines below.

DANGER

Exhaust gas from the engine contains carbon monoxide, a deadly poison. Expo-

sure to carbon monoxide can kill you in minutes.

f NEVER operate the machine inside an enclosed area, such as a tunnel, unless

adequate ventilation is provided through such items as exhaust fans or hoses.

BS 50-4s Safety Information

wc_si000403gb.fm 19

• Do not refuel if the machine is positioned in a truck fitted with a

plastic bed liner. Static electricity can ignite the fuel or fuel vapors.

2.5 Service Safety

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.

Personal Protective Equipment (PPE)

Wear the following Personal Protective Equipment (PPE) while

servicing or maintaining this machine:

• Close-fitting work clothes that do not hinder movement

• Safety glasses with side shields

• Hearing protection

• Safety-toed footwear

In addition, before servicing or maintaining the machine:

• Tie back long hair.

• Remove all jewelry (including rings).

Service training

Before servicing or maintaining the machine:

• Read and understand the instructions contained in all manuals

delivered with the machine.

• Familiarize yourself with the location and proper use of all

controls and safety devices.

• Only trained personnel shall troubleshoot or repair problems

occurring with the machine.

• Contact Wacker Neuson Corporation for additional training if

necessary.

When servicing or maintaining this machine:

• Do not allow improperly trained people to service or maintain the

machine. Personnel servicing or maintaining the machine must

be familiar with the associated potential risks and hazards.

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

Rotating parts can cause severe injury.

2.5.2 DO NOT operate the machine without an air cleaner.

2.5.3 DO NOT remove air cleaner cover, paper element, or precleaner while

engine is running.

2.5.4 DO NOT alter engine speeds. Run the engine only at speeds specified

in the Technical Data Section.

WARNING

Safety Information BS 50-4s

20 wc_si000403gb.fm

2.5.5 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.

2.5.6 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.

2.5.7 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.

2.5.8 ALWAYS replace the safety devices and guards after repairs and

maintenance.

2.5.9 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.

2.5.10 ALWAYS do periodic maintenance as recommended in the Operator’s

Manual.

2.5.11 ALWAYS clean debris from engine cooling fins.

2.5.12 When replacement parts are required for this machine, use only

Wacker Neuson replacement parts or those parts equivalent to the

original in all types of specifications, such as physical dimensions,

type, strength, and material.

2.5.13 Disconnect the spark plug on machines equipped with gasoline

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

2.5.14 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.

2.5.15 Do not operate the machine with unapproved accessories or

attachments.

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