Wacker Neuson BS 50-4s User manual

0170872en 001 0610
Operator’s Manual
Rammer
BS 50-4s
0170872EN

Copyright
notice
© Copyright 2010 by Wacker Neuson Corporation.
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: [phone] · Fax: [phone] · Tel: [phone]
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
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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
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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.
fObey all safety messages that follow this symbol.
DANGER
DANGER indicates a hazardous situation which, if not avoided, will result in death
or serious injury.
fTo 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.
fTo 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.
fTo 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.
fRead 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.
fNEVER 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.