This manual is published by Rayco Manufacturing, Inc. for the
benefit of the users of Rayco products. Rayco Manufacturing,
Inc. has made every effort to ensure that this manual is
correct and up to date at the time of publication. However,
due to continuous improvements, Rayco Manufacturing, Inc.
reserves the right to make changes in the contents, at any
time, without notice or obligation.
Each machine shipped contains operation, maintenance
& parts manuals to familiarize the operator with the proper
operating, lubricating and maintenance instructions. This
helps to ensure the best possible performance and service
from the machine. Read and understand all instructions before
attempting to operate this machine. This manual should be
readily available for reference at all times. Additional copies
of this manual may be purchased from Rayco.
This Rayco machine was designed and manufactured by
Rayco Manufacturing, Inc., Wooster, Ohio. Due to continuous
improvements, Rayco reserves the right to make changes
in engineering, design and specifications, or discontinue
manufacture, at any time, without notice or obligation.
Always have a record of the model numbers and serial
numbers for your machine to specify when ordering parts.
Record your machine model and serial numbers on page 4
for your personal records.
NOTICE:
Maintenance and Repairs should ONLY be performed by a trained
specialists or qualified personel.
Please contact Rayco Mfg for a listing of approved maintenance
facilities in your area.
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RG74DXH Operator · Service · Maintenance Manual
Table of Contents
TABLE OF CONTENTS
Foreword4
Safety 8
Operation24
Warranty37
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RG74DXH Operator · Service · Maintenance Manual
Foreword
Literature Information
The operators manual should be stored in the operator’s
compartment in the literature holder storage area. Rayco
provides a binder to hold the Operator Service Manual, Parts
Manual, Engine Manual along with other component manuals.
These manuals contain safety information, operation
instruction, transportation information, lubrication information
and maintenance information.
Some photographs or illustrations in the publication show
details of attachments that can be different from your machine.
Guards and covers might have been removed for illustrative
purposes. Continuing improvement may have caused changes
to your machine which may not be included in this publication.
Continuing improvement and advancement of product
design might have caused changes to your machine which
are not included in this publication. Read, study and keep
this manual with the machine.
Whenever a question arises regarding your machine, of this
publication, please consult your Rayco dealer for the latest
available information.
Safety
The safety section lists basic safety precautions. In addition,
this section may include text and locations of warning signs
and labels used on the machine.
Read and understand the basic precautions listed in the
safety section before operating or performing lubrication,
maintenance and repair on this machine.
Parts
Parts are readily found through illustrations with accompanying
Rayco part numbers. The machine assembly is listed by basic
groups to enable ease of finding parts.
Please consult your local Rayco Dealer or local Engine
Manufacturer Dealer for obtaining engine parts and service
Operation
The operation section is a reference for the new operator
and a refresher for the experienced operator. This section
includes a discussion of gauges, switches, machine controls,
attachment controls, transportation and towing information.
Photographs and illustrations guide the operator through
correct procedures of checking, starting, operating and
stopping the machine.
Operating techniques outlined in this publication are basic.
Skill and techniques develop as the operator gains knowledge
of the machine and its capabilities.
4
Maintenance
The maintenance section is a guide to equipment care.
The Maintenance Interval Schedule lists the items to be
maintained at a specific service interval. The Maintenance
Interval Schedule lists the page number for the step-bystep instructions required to accomplish the scheduled
maintenance procedure.
Maintenance Intervals
Use the service hour meter to determine servicing intervals.
Calendar intervals shown (daily, weekly, monthly, etc.) can be
used instead of service hour meter intervals if they provide
more convenient servicing schedules and approximate the
indicated service hour meter reading. Recommended service
should always be performed at the interval that occurs first.
Under extremely severe, dusty or wet operating conditions,
more frequent lubrication than is specified in the maintenance
intervals chart might be necessary.
Perform service on items at multiples of the original
requirement. For example, at every 100 service hours, also
service those items listed under every 50 service hours and
every 10 service hours or daily.
Certified Engine Maintenance
Proper maintenance and repair is essential to keep the engine
and machine systems operating correctly. As the heavy duty
off-road engine owner, you are responsible for the required
maintenance listed in the Engine Owner Manual & Machine
Operator, Maintenance & Service Manual.
Attach a “Do Not Operate” warning tag or a similar warning
tag to the start switch or to the controls before you service
the equipment or before you repair the equipment.
Know the width of your equipment in order to maintain proper
clearance with you operate the equipment near fences or
near boundary obstacles.
Be aware of high voltage power lines and power cables
that are buried. If the machine comes in contact with these
hazards, serious injury or death may occur from electrocution.
Wear a hard hat, protective glasses, and other protective
equipment, as required.
Do not wear loose clothing or jewelry that can snag on
controls or on other parts of the equipment.
Make sure that all protective guards and all covers are secured
in place on the equipment.
Keep the equipment free from foreign material. Remove
debris, oil, tools, and other items from the deck, from walkways,
and from steps.
Secure all loose items such as lunch boxes, tools, and other
items that are not a part of the equipment.
Know the appropriate work site hand signals and the personnel
that are authorized to give the hand signals. Accept hand
signals from one person only.
Do not smoke when you service an air conditioner. Also, do
not smoke if refrigerant gas may be present. Inhaling the fumes
that are released from a flame that contact air conditioner
refrigerant can cause bodily harm or death. Inhaling gas
RG74DXH Operator · Service · Maintenance Manual
Foreword
from air conditioner refrigerant through a lighted cigarette
can cause bodily harm or death.
Never put maintenance fluids into glass containers. Drain
all liquids into a suitable container.
Obey all local regulations for the disposal of liquids.
Use all cleaning solutions with care. Report all necessary
repairs.
Do not allow unauthorized personnel on the equipment.
Unless you are instructed otherwise, perform maintenance
with the equipment in the servicing position. Refer to
Operation and Maintenance Manual for the procedure for
placing the equipment in the servicing position. When you
perform maintenance above ground level, use appropriate
devices such as ladders or man lift machines. If equipped,
use the machine anchorage points and use approved fall
arrest harnesses and lanyards.
CALIFORNIA
Proposition 65 Warning
Diesel engine exhaust and some of its constituents are known
to the State of California to cause cancer, birth defects, and
other reproductive harm.
Battery posts, terminals and related accessories contain lead
and lead compounds. Wash hands after handling.
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RG74DXH Operator · Service · Maintenance Manual
Foreword
Machine Description
The Rayco RG74DXH is a high-production stump cutter
powered by a massive 3.8L Cummins 74hp diesel engine that
generates peak torque of 295ft-lbs. The large displacement
diesel engine delivers more cutting power than most 100hpclass stump cutters and meets Tier 4 Final emissions
without complex after-treatment systems. Compared to the
competition, the difference is clear.
Engine: to be operable on (up to) a 30° slope with the cutter
wheel in the full up or down position
Engine: must remain level with machine frame and not tilt
upward or downward while in operation. Also, engine must not
move left or right while in operation.
Hydraulic System - Cutter
Cutter Pump: Variable displacement axial piston
Cutter Motor: Fixed displacement axial piston
Cutter Pump Displacement: Electronic controlled with neutral
start
Command Cut: Swing speed control and horsepower optimizer
Filter: Easy access suction filter and pressure filter
Aux System Pressure Relief: 2250 psi (155 bar)
Lift & swing cylinders: 2 ½” bore x 7-3/8” stroke, 1-1/8” rod
Cutter Wheel: Must come to a stop in less than three seconds
without shutting off engine
Cutter Wheel Engagement: Hydrostatic pump. No clutch
necessary
Cutting Range (without repositioning)
Below Ground Level: 26”
Above Ground Level: 31”
Forward – Backward: 60” (152.4 cm) Minimum
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RG74DXH Operator · Service · Maintenance Manual
Serial Number Location & Information
VIN Numbers Location
Whenever communicating with Rayco or your Rayco dealer,
have your machine serial number handy, as it can help
pinpoint most exactly what information is needed in caring
for your machine.
It is attached to the machine at the location shown. For
ready reference, record it in the boxes provided on the
inside front cover of this manual.
For reference on communication regarding the engine,
record its model and serial numbers also in the boxes
provided on the inside front cover of this manual. See the
Engine Operator Manual for assistance in locating the
numbers on the engine.
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RG74DXH Operator · Service · Maintenance Manual
Serial Number Location & Information
Serial number is located as shown.
Use the below table to record identification numbers and dealer information.
Identification Numbers
Model NumberSerial Number
Machine
Engine
Implement
Implement
Dealer Information
Name
Address
Dealer ContactPhone NumberHours
Sales
Parts
Service
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RG74DXH Operator · Service · Maintenance Manual
Safety
Important Safety Information
Most accidents that involve product operation, maintenance
and repair are caused by failure to observe basic safety rules or
precautions. An accident can often be avoided by recognizing
potentially hazardous situations before an accident occurs.
A person must be alert to potential hazards. This person
should also have the necessary training, skills and tools to
perform these functions properly.
Improper operation, lubrication, maintenance or repair of this
product can be dangerous and could result in injury or death.
Do not operate or perform any lubrication, maintenance or
repair on this product, until you have read and understood
the operation, lubrication, maintenance and repair information.
Safety precautions and warnings are provided in this manual
and on the product. If these hazard warnings are not heeded,
bodily injury or death could occur to you or to other persons.
The hazards are identified by the “Safety Alert Symbol”
and followed by a “Signal Word” such as “DANGER”,
“WARNING” or “CAUTION”. The Safety Alert “WARNING”
label is shown below.
Safety Warnings
To highlight specific safety information the following
designations are provided to assist the reader.
This is the “Safety Alert” symbol. It is used
to ALERT you to the potential personal
injury hazards. Obey all safety messages
that follow this symbol to avoid possible
injury or death.
Indicates an imminently hazardous situation which, if not
avoided, could result in death or serious injury.
Indicates a potentially hazardous situation which, if not
avoided, will result in death or serious injury.
unsafe by the operation, lubrication, maintenance, or repair
procedures that you choose.
The procedures described in this “Safety” section may not
be fully explained here, but a more complete explanation is
given in the “Operation”, or in the “Maintenance” section.
The information, specifications, and illustrations in this
publication are on the basis of information that was available at
the time that the publication was written. The specifications,
torques, pressures, measurements, adjustments, illustrations,
and other items can change at any time. These changes can
affect the service that is given to the product. Obtain the
complete and most current information before you start any
job. Rayco dealers have the most current information available.
Rayco Manufacturing, Inc. is greatly concerned with the
safety of the operator, as well as all in the vicinity of his work.
Rayco has provided shields, guards, safety decals and other
important safety features to aid in using the machine properly.
In order to further ensure your safety we ask that you properly
operate and service your machine.
This machine is capable of amputating hands and feet and
throwing objects.
Failure to observe safety instructions, improper operation,
lubrication, maintenance, or repair of this product could
result in severe injury or death.
Do not operate or perform any lubrication, maintenance, or
repair on this product, until you have read, you understand,
and you decide to do so in compliance with all of the
operation, lubrication, maintenance, and troubleshooting
information contained in these Operator and Parts Manuals
and that contained in the Engine Operator Manual, which are
included with this machine. Additional manuals are available
from Rayco or your Rayco dealer.
When replacement parts are required for this product Rayco
recommends using Rayco replacement parts or parts with
equivalent specifications including, but not limited to, physical
dimensions, type, strength and material.
Failure to heed this warning can lead to premature
failures, product damage, personal injury of death.
Indicates a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury.
A message, either written or pictorial, follows to explain the
hazard. Rayco cannot anticipate every possible circumstance
that might involve a potential hazard. The warnings in this
publication and on the product are therefore not all inclusive.
If you desire to make use of a tool, procedure, work method,
or operating technique not specifically recommended by
Rayco, you must use it only if you have accurately evaluated
it and found that it threatens no one’s safety. You should
also ensure that the product will not be damaged or made
10
General Hazard Information
• Read, understand and follow all instructions on the
machine and in the manuals before attempting to operate.
Keep all manuals in a safe place for future reference and
for ordering replacement parts.
• Familiarize yourself with all controls in a safe environment
before operation. Know how to stop the machine and
disengage the controls quickly.
• Never allow minors to operate this machine.
• Never allow anyone who has not had proper instruction
to operate this machine.
• Keep bystanders, children and pets away from the
machine and work area.
• Never allow anyone to ride on this machine.
• Never transport cargo, tools or wood on this machine.
• Keep the operator zone and adjacent area clear for
safe, secure footing.
• Use the machine in daylight or under good artificial
lighting.
• Use this machine for its intended purpose only, deviation
from the machines capabilities could damage the
equipment and cause injury or death.
RG74DXH Operator · Service · Maintenance Manual
Safety
Engine exhaust contains products of combustion which can
be harmful to your health. Always start and operate the engine
in a well ventilated area. If you are in an enclosed area, vent
the exhaust to the outside.
Personal Protective Equipment
Head protection - must conform to ANSI Z89.1 and DO
NOT wear under chin strapping while operating or within the
operation area of the Horizontal Grinder.
Eye protection - must conform to ANSI Z87.1 and be the wrap
around style. Always wear the eye protection when operating
or working within the operational area of the machine.
Hearing Protection - Plug type ear protection or full ear
coverage devices (muff type) shall be worn at all times when
operating or within the operational area of the machine.
Gloves - When operating or handling brush within the
operational area of the Horizontal Grinder, loose fitting
gloves are the only gloves that should be worn. DO NOT
wear gauntlet or strapped gloves.
Clothing Protection - Clothes must be close fitting, but
not restrictive of movement. DO NOT wear loose fitting
clothes, jewelry or long dangling clothing; i.e. neckties, long
belts or chains.
Hooded sweat shirts may be worn only if the hood is tightly
drawn around the face with drawstrings tucked into the
outer garment when not in use. If working near traffic, wear
reflective clothing.
Shoes - (Foot Protection)- Always over the ankle work boots
with skid resistant soles.
Breathing Protection - When breathing protection is required
the use of paper masks that can tear away if caught or
entangled in material or machine must be worn.
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Flying Debris
Do not allow anyone to stand in front or directly behind the
machine. Flying debris could be thrown past guards and
injure bystanders if they are in these areas.
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RG74DXH Operator · Service · Maintenance Manual
Safety
Pressurized Air and Water
Pressurized air and/or water can cause debris and/or hot
water to be blown out. This could result in personal injury.
When pressurized air and/or pressurized water is used for
cleaning, wear protective clothing, protective shoes, and eye
protection. Eye protection includes goggles or a protective
face shield.
The maximum air pressure for cleaning purposes must be
reduced to 205 kPa (30 psi) when the nozzle is deadheaded
and the nozzle is used with an effective chip deflector and
personal protective equipment. The maximum water pressure
for cleaning purposes must be below 275kPa (40 psi).
Never use compressed air for cleaning.
Trapped Pressure
Pressure can be trapped in a hydraulic system. Releasing
trapped pressure can cause sudden machine movement
or attachment movement. Use caution if you disconnect
hydraulic lines of fittings. High pressure oil that is released
can cause a hose to whip. High pressure oil that is released
can cause oil to spray. Fluid penetration can cause serious
injury and possible death.
Fluid Penetration
Pressure can be trapped in the hydraulic circuit long after
the engine has been stopped. The pressure can cause hydraulic fluid or items such as pipe plugs to escape rapidly if
the pressure is not relieved correctly.
Do not remove any hydraulic components or parts until
pressure has been relieved or personal injury may occur.
Do not disassemble any hydraulic components or parts
until pressure has been relieved or personal injury may
occur. Refer to the Service Manual for any procedures that
are required to relieve the hydraulic pressure
Always use a board or cardboard when you check for a leak.
Leaking fluid that is under pressure can penetrate body
tissue. Fluid penetration can cause serious injury and
possible death. A pin hole leak can cause sever injury.
If fluid is injected into your skin you must get treatment
immediately. Seek treatment from a doctor that is familiar
with this type of injury.
Asbestos Information
Rayco recommends the use of only genuine Rayco
replacement parts. Use the following guidelines when you
handle any replacement parts that contain asbestos or when
you handle asbestos debris.
Use caution. Avoid inhaling dust that might be generated
when you handle components that contain asbestos fibers.
Inhaling this dust can be hazardous to your health.
The components that may contain asbestos fibers are brake
pads, brake bands, lining material, clutch plates, and some
gaskets. The asbestos that is used in these components
is usually bound in a resin or sealed in some way. Normal
handling is not hazardous unless airborne dust that contains
asbestos is generated.
If dust that may contain asbestos is present, there are several
guidelines that should be followed:
• Avoid brushing materials that contain asbestos.
• Avoid grinding materials that contain asbestos.
• Use a wet method in order to clean up asbestos material.
• A vacuum cleaner that is equipped with a high efficiency
particulate air filter (HEPA) can also be used.
• Use exhaust ventilation on permanent machining jobs.
• Wear an approved respirator if there is no other way
to control the dust.
• Comply with applicable rules and regulations for the
work place, In the United States, refer to Occupational
Safety and Health Administration (OSHA) requirements.
• Obey environmental regulations for the disposal of
asbestos.
• Stay away from areas that might have asbestos particles
in the air
Respiratory Protection
Rayco recommends the use of dust masks or respirators
to be worn over the nose and mouth that protect the lungs
from air-borne dust and irritants. When working in activities
12
such as chipping brush, stump grinding, working near old
wood or chip piles, non-toxic nuisance dusts can be harmful.
NOTICE
Dust masks and/or particulate respirators only
protect against particles (e.g., dust). They do not
protect against chemicals, gases or vapors, and are
intended only for low hazard levels.
Dispose of Waste Properly
Improperly disposing of waste can threaten the environment.
Potentially harmful fluids should be disposed of according
to local regulations.
Always use leak proof containers when you drain fluids. Do
not pour waste onto the ground, down a drain, or into any
source of water.
• Tools that are suitable for collecting fluids and equipment
that is suitable for collecting fluids
• Tools that are suitable for containing fluids and equipment
that is suitable for containing fluids
Containing Fluid Spillage
Care must be taken in order to ensure the fluids are contained
during performance of inspection, maintenance, testing,
adjusting and repair of the equipment. Prepare to collect the
fluid with suitable containers before opening any compartment
or disassembling any component that contains fluids.
Obey all local regulations for the disposal of liquids.
Crushing & Cutting Prevention
RG74DXH Operator · Service · Maintenance Manual
Safety
Do not work beneath the cab of the machine unless the cab
is properly supported.
Unless you are instructed otherwise, never attempt
adjustments while the machine is moving or while the engine
is running.
Never jump across the starter solenoid terminals in order to
start the engine. Unexpected machine movement could result.
Whenever there are equipment control linkages, the clearance
in the linkage area will change with the movement of the
equipment or the machine. Stay clear of areas that may have
a sudden change in clearance with machine movement or
equipment movement.
Avoid contact with the rotating feed wheel, cutter wheel
and rotor.
Always shut-off the engine and wait for all moving parts,
belts, fans, rotors, drums, cutting wheels (etc.) to come to a
complete stop before opening access covers and/or guards.
Stay clear of all rotating and moving parts. A moving belt,
pulley, sprocket and chain can suddenly pull a limb into them
causing loss or severe injury.
If it is necessary to remove guards in order to perform
maintenance, always install the guards after the maintenance
is performed.
Keep objects away from moving fan blades. The fan blade
will throw or cut objects.
Do not use a kinked wire cable or a frayed wire cable. Wear
gloves when you handle wire cable.
When you strike a retainer pin with force, the retainer pin
can fly out. The loose retainer pin can injure personnel.
Make sure that the area is clear of people when you strike
a retainer pin. To avoid injury to your eyes, wear protective
glasses when you strike a retainer pin.
If equipment is unhitched from the tow vehicle for operation,
always block the wheels and support the tongue weight
with blocking to prevent unintended movement. Do not use
only the jack stand to support the tongue while in operation.
Support the equipment properly before you perform any work
or maintenance beneath that equipment. Do not depend on
the hydraulic cylinders to hold up the equipment. Equipment
can fall if a control is moved, or if a hydraulic line breaks.
Do not perform any work until you have read and followed
the proper “Lock-Out / Tag-Out” procedures.
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RG74DXH Operator · Service · Maintenance Manual
Safety
Burn Prevention
Do not touch any part of an operating engine. Allow the
engine, radiator, exhaust and hydraulic reservoir to cool before
any maintenance is performed. Relieve all pressure in the
air system, oil system, lubrication system, fuel system, and/
or in the cooling system before any lines, fittings or related
items are disconnected.
In addition, avoid contact with other related hot engine parts
such as exhaust manifolds, turbochargers and mufflers.
External exhaust parts become very hot during operation.
Paper, cloth, and wooden materials could ignite if they come
in contact with these parts.
Coolant
When the engine is at operating temperature, the engine
coolant is hot. The coolant is also under pressure. The
radiator and all lines to the heaters or to the engine contain
hot coolant.
Any contact with hot coolant or with steam can cause severe
burns. Allow cooling system components to cool before the
cooling system is drained.
Check the coolant level only after the engine has been stopped.
Ensure that the filler cap is cool before removing the filler
cap. The filler cap must be cool enough to touch with a bare
hand. Remove the filler cap slowly in order to relieve pressure.
Cooling system conditioner contains alkali. Alkali can cause
personal injury. Do not allow alkali to contact the skin, the
eyes or the mouth.
Oils
Hot oil and hot components can cause personal injury. Do
not allow hot oil to contact the skin. Also, do not allow hot
components to contact the skin.
Remove the hydraulic tank filler cap only after the engine
has been stopped. The filler cap must be cool enough to
touch with a bare hand. Follow the standard procedure in
this manual in order to remove the hydraulic tank filler cap.
Batteries
Electrolyte is an acid. Electrolyte can cause personal injury.
Do not allow electrolyte to contact the skin or the eyes.
Always wear protective glasses for servicing batteries. Wash
hands after touching the batteries and connectors. Use of
gloves is recommended.
Fire & Explosion Prevention
All fuels, most lubricants, and some coolant mixtures are
flammable.
Flammable fluids that are leaking or spilled onto hot surfaces
or onto electrical components can cause a fire. Fire may
cause personal injury and property damage.
Remove all flammable materials such as fuel, oil, and debris
from the machine. Do not allow any flammable materials
to accumulate on the machine. Serious personal injury can
occur when fuel or oil is spilled on yourself or your clothes,
which can ignite.
Store fuels and lubricants in properly marked containers away
from unauthorized persons. Store oily rags and any flammable
materials in protective containers. Do not smoke in areas
that are used for storing flammable materials.
Do not operate the machine near any flame.
Extinguish all cigarettes, cigars, pipes and other sources
of ignition.
Exhaust shields (if equipped) protect hot exhaust components
from oil spray or fuel spray in case of a break in a line, in a
hose, or in a seal. Exhaust shields must be installed correctly.
Do not weld on lines or on tanks that contain flammable fluids.
Do not flame cut lines or tanks that contain flammable fluid.
Clean any such lines or tanks thoroughly with a nonflammable
solvent prior to welding or flame cutting.
Check all electrical wires daily. Repair any wires that are
loose or frayed before you operate the machine. Clean all
electrical connections and tighten all electrical connections.
Dust that is generated from repairing nonmetallic hoods or
non metallic fenders can be flammable and/or explosive.
Repair such components in a well ventilated area away from
open flames or sparks.
14
Inspect all lines and hoses for wear or for deterioration. The
hoses must be properly routed. The lines and the hoses
must have adequate support and secure clamps. Tighten
all connections to the recommended torque. Leaks can
cause fires.
Use caution when you are refueling a machine. Do not smoke
while you are refueling a machine. Do not refuel a machine
near open flames or sparks. Always stop the engine before
refueling. Fill the fuel tank outdoors.
Gases from a battery can explode. Keep any open flames
or sparks away from the top of a battery. Do not smoke in
battery charging areas.
Never check the battery charge by placing a metal object
across the terminal posts. Use a voltmeter or a hydrometer.
Improper jumper cable connections can cause an explosion
that can result in injury. Refer to the Operation Section of
this manual for specific instructions.
Do not charge a frozen battery. This may cause an explosion.
Fire Extinguisher
Make sure that a fire extinguisher is available. Be familiar
with the operation of the fire extinguisher. Inspect the fire
extinguisher and service the fire extinguisher regularly. Obey
the recommendations on the instruction plate.
Fire Extinguisher Location
Make sure that a fire extinguisher is on the machine. Make sure
that you are familiar with the operation of the fire extinguisher.
Inspect the fire extinguisher and service the fire extinguisher.
Obey the recommendations on the instruction plate.
Mount the fire extinguisher in an easily accessible place on
the machine, for crawlers mount on the left side of the cab
behind the seat. Consult your Rayco dealer for the proper
procedure of mounting the fire extinguisher.
Ether Starting Fluid
Ether is flammable and poisonous.
Use ether in well ventilated areas. Do not smoke while you
are replacing an ether cylinder or while you are using an
ether spray.
Do not store ether cylinders in living areas or in the operator
compartment of a machine. Do not store ether cylinders in
direct sunlight or in temperatures above 49 °C (120 °F). Keep
ether cylinders away from open flames or sparks.
Dispose of used ether cylinders properly. Do not puncture an
ether cylinder. Keep ether cylinders away from unauthorized
personnel.
Do not spray ether into an engine if the machine is equipped
with a thermal starting aid for cold weather starting
RG74DXH Operator · Service · Maintenance Manual
Safety
Lines, Tubes and Hoses
Do not bend high pressure lines. Do not strike high pressure
lines. Do not install any lines that are bent or damaged.
Repair any lines that are loose or damaged. Leaks can
cause fires. Consult your Rayco dealer for repair or for
replacement parts.
Check lines, tubes and hoses carefully. Do not use your bare
hand to check for leaks. Use a board or cardboard to check
for leaks. Tighten all connections to the recommended torque.
Replace the parts if any of the following conditions are present:
• End fittings are damaged or leaking
• Outer coverings are chafed or cut.
• Wires are exposed.
• Outer coverings are ballooning.
• Flexible part of the hoses are kinked.
• Outer covers have embedded armoring.
• End fittings are displaced. Make sure that all clamps,
guards, and heat shields are installed correctly. During
machine operation, this will help to prevent vibration,
rubbing against other parts, and excessive hear.
Electrical Storm Injury Prevention
When lightning is striking in the vicinity of the machine, the
operator should never attempt to operate the machine. If you
are on the ground during an electrical storm, stay away from
the vicinity of the machine!
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RG74DXH Operator · Service · Maintenance Manual
Safety
Before Operation
Safety information is available in English for this machine.
A list of some of the material is available in the Operation
and Maintenance Manual, “Reference Material”. Consult
your Rayco dealer in order to obtain copies of the material.
The information should be reviewed by every person that
operates the machine.
Clear all personnel from the machine and from the area.
Clear all obstacles from the path of the machine. Beware
of hazards such as wires, ditches, etc.
Make sure that all windows are clean. Secure all doors in the
closed position. Secure the windows in the open position
or in the shut position.
Call 811 Before You Dig. One free, easy call gets your utility
lines marked and helps protect you from injury and expense.
Know whats below, before you dig. Go to www.call811.com
for more details.
Guards (Operator Protection)
There are different types of guards that are used to protect
the operator. The machine and the machine application
determines the type of guard that should be used.
A daily inspection of the guards is required in order to check
for structures that are bent, cracked or loose. Never operate
a machine with a damaged structure.
The operator becomes exposed to a hazardous situation if the
machine is used improperly or if poor operating techniques
are used. This situation can occur even though a machine is
equipment with an appropriate protective guard.
Other Guards (If Equipped)
Protection from flying object and/or falling objects is required
for special applications. Logging applications and demolition
applications are two examples that require special protection.
A front guard needs to be installed when a work tool that
creates flying objects is used. Mesh front guards that are
approved by Rayco or polycarbonate front guards that are
approved by Rayco are available for machines with a cab or
an open canopy. On machines that are equipped with cabs,
the windshield should also be closed. Safety glasses are
recommended when flying hazards exist for machines with
cabs and machines with open canopies.
If the work material extends above the cab, top guards and
front guards should be used.
Additional guards may be required for specific applications
or work tools. The Operation and Maintenance Manual
for your machine or your work tool will provide specific
requirements for the guards. Consult your Rayco dealer for
additional information.
Precautions for Welding on FRAME with
ENGINE/MACHINE Electronic Control
Unit (ECU)
Important: ALWAYS disconnect Electronic Control Unit (ECU)
connectors, battery and engine control system-to-machine
ground before welding on engine or machine.
High currents or electrostatic discharge in electronic
components from welding may cause permanent damage
Safety Decals
The safety decals located on this machine contain useful
and important information which will help you to operate
your machine safely. The complete decal kit and location of
each decal is given in the “Parts” manual. For your protection,
familiarize yourself with each label until you completely
understand the warning intended. Do not violate any such
warnings!
Keep all decals in place and in good condition:
• Use soap and water to keep decals clean. DO NOT
use mineral spirits, abrasive cleaners or other similar
cleaners which will damage the decals.
• Replace any damaged or missing decals. Before
attaching decals, the surface temperature of the metal
must be at least 40 degrees. The metal should also be
clean and dry before attaching the decal.
• If a machine component to which a decal is attached is
replaced, be sure to replace the decal as well.
• Replacement decals may be purchased from Rayco Mfg
or your Rayco dealer.
Visibility Information
Before you start the machine, perform a walk-around
inspection in order to ensure that there are no hazards
around the machine.
While the machine is in operation, constantly survey the area
around the machine in order to identify potential hazards as
hazards become visible around the machine.
It may not be possible to provide direct visibility on large
machines to all areas around the machine. Appropriate job
site organization is required in order to minimize hazards that
are caused by restricted visibility. Job site organization is a
collection of rules and procedures that coordinates machines
and people that work together in the same area. Examples
of job site organization include the following:
• Safety instructions
• Controlled patterns of machine movement and vehicle
movement
• Workers that direct traffic to move when it is safe
• Restricted areas
• Operator training
• Warning symbols or warning signs on machines or
on vehicles
• A system of communication
• Communication between workers and operators prior
to approaching the machine
Modifications of the machine configuration by the user that
result in a restriction of visibility shall be evaluated.
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Before Starting Engine
Start the engine only from the operator compartment. Never
short across the starter terminate or across the batteries.
Shorting could damage the electrical system by bypassing
the engine neutral start system.
Before you start the engine and before you move the machine,
make sure that no one is underneath the machine, around
the machine, or on the machine. Make sure that the area is
free of personnel.
Engine Starting
If a warning tag is attached to the start switch or to the controls,
do not start the engine. Also, do not move any controls.
Move all hydraulic controls to the NEUTRAL position before
you start the engine.
Diesel engine exhaust contains products of combustion
which can be harmful to your health. Always start the engine
in a well ventilated area. Always operate the engine in a
well ventilated area. If you are in an enclosed area, vent the
exhaust to the outside.
Operation
NOTICE
The intended use(s) of this machine e.g. Outdoor
use only, Trained Operators only.
Only operate the machine controls when the engine is running.
Do not leave the operators station while machine is running
unless equipped with a remote.
Before you move the machine, you must be certain that no
one will be endangered.
While you operate the machine and the work tool slowly in
an open area, check for proper operation of all controls and
all protective devices.
Do not allow riders on the machine.
Note any needed repairs during machine operation. Report
any needed repairs to certified service technician.
Use only Rayco Approved Work Tools on this machine. Obey
all the lift restrictions. Refer to Operation and Maintenance
Manual, “Rayco Approved Work Tools” for the approved work
tools and the lift restriction information.
Do not go close to the edge of a cliff, an excavation, or an
overhang.
If the machine begins to sideslip downward on a grade,
immediately turn the machine downhill.
Avoid any conditions that can lead to tipping the machine.
The machine can tip when you work on hills, on banks and on
slopes. Also, the machine can tip when you cross ditches,
ridges or other unexpected obstacles.
Avoid operating the machine across the slope. When possible,
operate the machine up the slopes and down the slopes.
Maintain control of the machine. Do not overload the machine
beyond the machine capacity.
Never straddle a wire cable. Never allow personnel to
straddle a wire cable.
RG74DXH Operator · Service · Maintenance Manual
Safety
Know the maximum dimensions of your machine.
Observe all applicable local government regulations when
you use this machine.
All personnel using this Machine must be trained in the
operation, safety and maintenance repair procedures.
Careless use of this Equipment could result in serious injury
or even death.
ALL PROCED URES I N THE SAFETY AND OPE RATION
SECTIONS OF THIS MANUAL MUST BE READ AND
UND ERSTOOD BEFORE STARTING TH IS MACHINE.
• All operators must be wearing the proper Personal
Protective Equipment before attempting to start and
operate this machine.
• Do not allow children or other spectators to standby
and watch the machine in operation.
• Familiarize yourself with all of the controls in a safe
environment before starting to work with this machine.
• Always have more than one person at the job site. If an
accident occurs, someone is there to assist or obtain help.
• Never operate or allow someone to operate the machine
while under the influence of alcohol, drugs, or any
medication that could affect the operator’s performance
and concentration. Maintain a drug-free work place.
• Always operate this machine with all safety equipment in
place and working. Make sure all controls are properly
adjusted for safe operation.
• Do not change the engine governor settings or over
speed the engine. The governor controls the maximum
safe operating speed of the engine
• Never leave this machine unattended with the engine
running.
• Use only your hand to operate the controls. Never use
a foot, knee, rope or any extension device.
• Never hand-feed this machine for any reason.
• Contact with moving parts, belts or rotating cutter wheels
can kill, injure or dismember.
• Turn off engine and wait for all movement to stop before
working on this machine. Lock-out/Tag Out all controls.
• If equipped, the Emergency Stop buttons must be
operating properly. These should each be checked and
verified to shut down the engine by the operator prior
to performing any work.
• CAUTION! FLYING D EBR IS! NEVER st and or allow
anyone else to be directly in front of machine.
• Material being discharged from machine can cause
severe injury, blindness or death.
• Always operate this machine from the operator area.
Never stand directly in front of machine as flying objects
could be thrown during operation.
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RG74DXH Operator · Service · Maintenance Manual
Safety
• Never move this machine, or make adjustments or repairs,
while the engine is running.
Slope Operation
NOTICE
This machine is to be utilized in an up/down
gradient (not across an angle).
Machines that are operating safely in various applications
depend on these criteria: the machine model, configuration,
machine maintenance, operating speed of the machine,
conditions of the terrain, fluid levels, and tire inflation
pressures. The most important criteria are the skill and
judgment of the operator.
A well trained operator that follows the instructions in the
Operation and Maintenance Manual has the greatest impact
on stability. Operator training provides a person with the
following abilities: observation of working and environmental
conditions, feel for the machine, identification
of potential hazards, and operating the machine safely by
making appropriate decisions.
When you work on side hills and when you work on slopes,
consider the following important points:
• Speed of travel – At higher speeds, forces of inertia
tend to make the machine less stable.
• Roughness of terrain or surface – The machine may be
less stable with uneven terrain.
• Direction of travel – Avoid operation the machine across
the slope. When possible, operate the machine up
the slopes and operate the machine down the slopes.
• Place the heaviest end of the machine uphill when you
are working on an incline.
• Mounted equipment – Balance of the machine may be
impeded by the following components: equipment that
is mounted on the machine, machine configuration,
weights, and counterweights.
• Nature of surface – Ground that has been newly filled
with earth may collapse from the weight of the machine.
• Surface material – Rocks and moisture of the surface
material may drastically affect the machine’s traction and
machine’s stability. Rocky surfaces may promote side
slipping of the machine.
• Slippage due to excessive loads – This may cause
downhill tracks or downhill tires to dig into the ground,
which will increase the angle of the machine.
• Width of tracks or tires – Narrower tracks or narrower
tires further increase the digging into the ground which
causes the machine to be less stable.
• Implements attached to the machine hitch or drawbar
– This may decrease the weight on the uphill tracks.
This may also decrease the weight on the uphill tires.
The decreased weight will cause the machine to be
less stable.
• Height of machine working load. When the working loads
are in higher positions, machine stability is reduced.
• Operated equipment – Be aware of performance
features of the equipment in operation and the effects
on machine stability.
• Operating techniques – Keep all attachments or pulled
loads low to the ground for optimum stability.
• Machine systems have limitations on slopes – Slopes can
affect the proper function and operation of the various
machine systems. These machine systems are needed
for machine control on slopes.
• Note: Safe operation on steep slopes may require special
machine maintenance. Excellent skill of the operator
and proper equipment for specific applications are
also required. Consult the Operation and Maintenance
Manual sections for the proper fluid level requirements
and intended machine use.
Work Tool options - Attachments
Only use work tools that are approved by Rayco for use on
Rayco machines. Refer to the Operation and Maintenance
Manual, Rayco options.
If you are in doubt about the compatibility of a particular work
tool with your machine, consult your Rayco dealer.
Make sure that all necessary guarding is in place on the host
machine and on the work tool.
Always wear protective glasses. Always wear the protective
equipment that is recommended in the work tool’s operation
manual. Wear any other protective equipment that is required
for the operating environment.
To prevent personnel from being struck by flying objects,
ensure that all personnel are out of the work area.
While you are performing any maintenance, any testing, or
any adjustments to the machine, stay clear of the following areas: cutting edges, pinching surfaces, and crushing
surfaces.
Equipment Lowering with Engine
Stopped
Before lowering any equipment with the engine stopped,
clear the area around the equipment of all personnel. The
procedure to use will vary with the type of equipment to be
lowered. Keep in mind this system use a high pressure fluid
to raise or lower equipment. The procedure will cause high
pressure hydraulic oil to be released in order to lower the
equipment. Wear appropriate personal protective equipment
and follow the established procedure in the Operation and
Maintenance Manual.
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LOCK-Out / Tag-Out Guidelines
Always practice lock out tag out procedures when working
on this machine.
Locking and tagging out equipment safeguards those working
on the equipment from being injured by its unexpected
energized or releasing stored energy. This section summarizes
the applicable requirements for lockout/ tag out procedures,
and its intent to comply with OSHA regulations.
Lock Out Procedure
• All affected persons are to be notified that the equipment
will be off and locked out.
• All energy sources for the equipment should be identified.
• The equipment shall be shut off or otherwise deenergized,
being careful to de-energize all energy sources. This
includes all valves, switches, breakers, or other controls
that supplies energy to the equipment. In case of
mechanical energy, a block may be used to stop the
release of stored energy.
• A lock is to be placed on each energy source disconnect
or energy release block.
1. The lock is to be placed directly on the equipment if
provided with an integral locking device.
2. If there is no integral lockout device on the equipment,
securely attach an independently manufactured lockout
device on the equipment and then place the lock on the
lockout device.
3. If none of the above are possible, use the tag out
procedure.
• A tag to be secured to the lock indicating that the
equipment is not to be energized and who owns the lock.
• It should be safely tested and verified that the lockout
does prevent the release of energy.
Tag Out Procedure
• This procedure is to be used only if it is not reasonable
to use the lockout procedure.
• All affected persons are to be notified that the equipment
will be shut off and tagged out.
• All energy sources for the equipment should be identified.
• The equipment shall be shut off or otherwise deenergized, being careful to de-energize all energy
sources. This includes all valves, switches, breakers, or
other controls that supplies energy to the equipment.
in case of mechanical energy, a block may be used to
stop the release of stored energy.
• Securely place a tag on each energy source disconnect
or energy release block.
Before the removal of a lockout/tag out
the following must be completed:
1. Removal of all non essential items.
RG74DXH Operator · Service · Maintenance Manual
Safety
2. Check to see that all workers and bystanders are
located in a safe position.
3. Inform all affected personnel.
• If a worker who applied the lockout/tag out is not present,
and his supervisor deems it necessary to energize the
equipment, the following must be done by the supervisor.
1. Make all reasonable effort to contact the worker who
placed the tag.
2. Determine the purpose of the lockout/tag out, and
whether it is safe to operate the equipment in its current
condition.
3. Remove all non essential items.
4. Inform all affected personnel.
5. Check to see that all affected persons are located in
a safe position.
6. Inform the worker of the lockout/tag out removal before
the worker starts to work for his/her next shift.
7. When more than one person works on the same
equipment, multiple lock/tag outs must be used. Only
when all locks are removed can the equipment be
energized.
Removal Procedure
• Lockout/tag out equipment must be removed by the
worker who placed it.
Parking
Park on a level surface. If you must park on a grade, chock
the machine.
1. Move the joystick control slowly to the NEUTRAL position
in order to stop the machine.
2. Move the throttle control lever to the LOW IDLE position.
3. Lower all implements (if equipped) so that the work tool
implement rests firmly on the ground.
4. Move the hydraulic controls to the NEUTRAL position.
5. Turn the engine start switch key to OFF position and
remove the key.
6. Disconnect the operator restraint devices (if
equipped) and exit the machine.
While Servicing and Performing
Maintenance on the Machine
• ALWAYS Block the wheels to prevent unintended
movement.
• Adhere to your LOCK-OUT/TAG-OUT procedure when
performing maintenance or repairs to this machine.
Locking and tagging out equipment safeguards
those working on equipment from being injured by its
unexpected energized or releasing stored energy.
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RG74DXH Operator · Service · Maintenance Manual
Safety
• To prevent fires, clean debris and chaff from the engine
and muffler areas.
• Periodically check that all nuts and bolts, hose clamps,
and hydraulic fittings are tight.
• When removing the fuel cap, unscrew it slowly, and
hold it firmly. The cap may otherwise be thrown due to
pressure buildup caused by an increase in temperature.
• For your safety, repair or replace all damaged or worn
parts immediately. Replacement parts which are
authorized by Rayco are the only parts which should be
used for repair or replacement on this machine.
• Altering this equipment, or using this equipment in
such a way as to circumvent its design capabilities and
capacities, could result in serious injury or fatality and
WILL VOID THE WARRANTY.
• Do not alter this machine in any manner. Alterations
such as attaching a rope to the control bar may result
in personal injury or death.
• NEVER remove the cap from the hydraulic tank or
reservoir while the machine is running. Hot oil under
pressure will cause injury.
• Relieve hydraulic system pressure before repairing
or adjusting fittings, hoses, tubing, or other system
components.
Pre-Transportation Checks
• Never allow inexperienced drivers to tow the machine.
• When towing, always make sure the tow vehicle ball
hitch and trailer/machine hitch coupler are the correct
matching size and style.
• Always make sure the tow vehicle and the trailer/machine
are on level ground and the wheels are chocked before
connecting or disconnecting.
• Make sure the tow vehicle is of adequate size and has
the towing capacity to safely tow the combined weight
of trailer/machine.
• Never tow a machine while it is running.
• Towing will affect handling, allow for extra stopping
distances. Refer to U-Haul’s “Safe Trailering” Driver
Education Program that is available at this website: http://
www.uhaul.com/guide/index.aspx?equipment=towingautotransport
• Make sure the towing eye is at the proper height so the
machine tows level when traveling. A proper amount of
tongue weight is required to allow the machine to tow
properly. Too little tongue weight will result in wandering,
fish-tailing, and/or axle damage.
NOTE: Use caution when backing up. The rear of the
RG74DXH may not be visible from the towing vehicle. It is
recommended to use a spotter outside the vehicle.
• Be aware of the length of the EQUIPMENT while
turning, parking, crossing intersections, and in all driving
situations. When arriving at the work site, do not set
up the EQUIPMENT under a tree that is being pruned,
cut, or worked on.
Important Towing Information
PREVE NT WHIPP ING by properly loading the auto transport
trailer. Load the heaviest end (engine end) of the vehicle-in-tow
to the FRONT of the trailer. Loading heavier in the rear can
cause the tow vehicle and transport trailer “combination” to
begin WHIP PING, which is violent and uncontrollable sway.
SIDE to SIDE MOTION (SWAY) THAT BEGINS as you
reach a certain speed, will likely become WHIPPING at
higher speeds. If you notice sway beginning SLOW DOWN
IMMEDIATELY by letting off the gas pedal. Then stop to
reload the vehicle-in-tow heaviest end forward as soon as
possible, and remove any cargo from the vehicle-in-tow
(vehicle carried on trailer).
IF WHIPPING or SWAY OCCURS, DO NOT steer. DO
NOT apply your brakes and NEVER speed up. Let off the gas
pedal and hold the steering wheel in a straight-ahead position.
A “combination disturbance” is improper handling, whipping,
sway, over-steering or other deviation of the tow vehicle or
trailer from their intended path, due to one or more causes
(improper loading, steering inputs, excessive speed,
cross winds, passing vehicles, rough roads, etc). IF A
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COMB INATION DISTUR BANCE OCCU RS, DO NOT steer
or brake. Steering or braking during a disturbance can cause
a loss of control or crash.
If a WHEE L GOES OFF TH E PAVED ROADWAY, DO NOT
steer sharply and DO NOT brake. Let off the gas pedal and
slow down below 25 mph. Then steer gradually back onto
the roadway. Proceed with caution entering traffic.
Loading Your Combination
NEVER load cargo inside the vehicle-in-tow or on the
trailer. Cargo inside the vehicle-in tow can cause sway or
WHIPPING.
NEVER overload your tow vehicle. Do not exceed the Gross
Vehicle Weight Rating (GVWR) and the Gross Axle Weight
Ratings (GAWR), which are posted on a label inside the
driver’s door opening.
Make sure the trailer is securely attached to the tow vehicle
hitch before loading and unloading.
Keep children and others at least 25 feet away during loading
and unloading.
Slow Down When Towing
AVOID CRASHES by slowing down. Reduce your speed
from what you would normally drive without a trailer under
similar road conditions. The maximum speed is 45 mph
when towing a trailer. Do not exceed any posted speed limit.
DRIVE DEFENSIVELY – anticipate stops, brake early, and
never follow closely.
BEFO RE going downhill, slow down and shift the transmission
into a lower gear. DO NOT RIDE BRAKES on downgrades.
Slow down for curves, adverse weather, hazardous road
conditions, road construction and expressway exits.
Before Towing and on the Road
Use the checklist at the end of these instructions before
towing and while on the road.
Make sure your tow vehicle is properly equipped and
maintained. Be sure all tires are inflated properly.
ALWAYS wear your seat belt.
DO NOT drive when you are fatigued, sleepy or distracted.
Avoid driving at night.
NEVER use a cell phone when driving. If you need to use a
cell phone find a safe place to exit the roadway.
NEVER drive under the influence of alcohol or any subst ance
that might impair your vision, judgment, or ability to control
the vehicle.
NEVER tow without properly inst alled tire straps and vehiclein-tow security chains.
DO NOT tow the trailer unless the tongue jack is fully raised
off the ground.
NEVER allow passengers to ride on the trailer.
No open or soft-top sport utility vehicle is allowed to tow a
trailer, because in the event of a crash, these vehicles offer
less collision and ejection protection.
Your Tow Vehicle
RG74DXH Operator · Service · Maintenance Manual
Safety
Refer to the owner’s manual, decal instructions or an
authorized automotive dealer for any specific handling
characteristics of your tow vehicle.
Changes to your tow vehicle from how it was manufactured
can affect its ability to tow. These changes can include different
tires, suspension changes, etc. Check your owner’s manual
or with an authorized automotive dealer to make sure any
changes to your tow vehicle are approved. DO NOT tow the
trailer if your tow vehicle has changes that are not approved.
Avoid driving on a compact spare tire any longer than
necessary. Follow the vehicle manufacturer instructions.
Maintenance and condition of your tow vehicle’s engine,
transmission, steering, suspension, front-end alignment, and
tires, may affect the vehicle’s ability to tow the auto transport
trailer. Have an authorized repair facility inspect and repair
your vehicle BEFORE towing.
To find the capabilities of the engine, transmission and axles
of your vehicle for towing, refer to the owner’s manual, or
check with an authorized dealer.
TOWING EQUIPMENT
REQUIREMENTS
Hitches must be able to tow the weight of your trailer and
your vehicle-in-tow .
When towing a trailer, all lights must be operational. Also,
your tow vehicle may require external mirrors on both sides.
Tire Pressure
Set all tires to the proper pressure. Find the recommended
COLD pressures on the tire sidewall, owner’s manual,
your vehicle’s door decal or in the trailer manual. DO NOT
put more pressure in the tire than is indicated on the tire
sidewall. Tire pressures go up during driving. DO NOT let
off this extra pressure.
Air pressure in the rear tires of some tow vehicles may be
increased to accommodate the additional weight of the trailer.
Inflate rear tires approximately 6 psi above normal, but do
not exceed the pressure limit stamped on tire.
Connecting Your Trailer
Lower the coupler onto the hitch-ball and follow the
instructions below to properly fasten the coupler to the hitchball. Do not allow your self to become distracted. Ensure
that the coupler is properly fastened to the hitch-ball before
moving to the next step.
COUPLER- Push down on the latch and fully open the
coupling. Lower the coupler onto the hitch-ball.
Check that the ball clamp is positioned below the coupler. The
coupler should completely cover and enclose the hitch-ball.
Tighten the coupler latch down.
Move the tow vehicle forward slightly, or push rearward on
the trailer to ensure that the hitch-ball is properly seated
inside the coupler. Recheck that it is tight.
Check all connections at each stop. Make sure the hitch and
hitch-ball are securely attached to your tow vehicle and the
trailer coupler is properly connected to the hitch-ball. Use the
checklist at the end of these instructions. If you suspect or
detect something is wrong, contact the nearest Rayco Dealer.
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RG74DXH Operator · Service · Maintenance Manual
Safety
Safety Chains
The purpose of the safety chains is to keep the trailer
connected to your tow vehicle in the unlikely event the coupler
comes off the ball or the ball comes off the hitch. Safety chains
are attached to the trailer tongue and are equipped with hooks.
DO NOT tow the trailer without the safety chains securely
attached to the towing vehicle. DO NOT attempt to pull the
trailer by the safety chains alone, unless this is necessary to
get the combination off the roadway to a safe place.
The left chain crosses underneath the trailer tongue and hooks
to the right side of the tow vehicle permanent hitch, frame
or structure, or to the tow vehicle bumper brackets. Do not
attach chains to the ball or to a ball mount that is removable.
The right chain hooks to the left side in the same manner.
Crossing the chains under the tongue allows the minimum
amount of slack for turning. Control slack by hooking the
chain back to itself or by twisting the links to shorten chain.
Be sure the hooks are secured.
The chains need slack to allow your vehicle to make turns.
Make sure these chains attach securely to your tow vehicle
and do not drag on the roadway.
Emergency Brake Cable/Chain
Trailers with brakes have a third chain, called the emergency
brake chain. This chain applies the brakes automatically in
the unlikely event of a separation of the trailer from the tow
vehicle. Attach this chain as close to the vehicle center
as possible; to the tow vehicle permanent hitch, frame or
structure, or to the bumper brackets. Twist chain to take
up most of the slack and secure. Some slack is necessary
to prevent the emergency brake from activating on turns or
inclined driveways.
Lighting Conditions
Make sure all tow vehicle and trailer lights function properly.
The connecting wires need slack to allow your tow vehicle
to make turns. Do not allow wires to drag on the roadway.
Photo-eye (if equipped)
DO NOT ATTEMPT TO DISABLE THE PHOTO
EYE. ANY ATTEMPT TO DO SO COU LD RES ULT
IN SERIOUS INJU RY OR DEATH. ALWAYS
ENSURE THE PHOTOEYE IS WORKING BEFORE
OPERATING THE MACHINE. IF THE PHOTOEYE
IS NOT OPERATIONAL, DO NOT OPERATE THE
MACHINE!
• Operator must be in proximity of the photo-eye (5) in
order to engage the cutter wheel. The cutter wheel will
shut down if operator steps away from the photo-eye.
Loading
Load the heaviest end (engine end) of the vehicle in-tow to
the FRONT of the trailer. Failure to load facing forward may
result in sway or WHIP PING and lead to total loss of control.
DO NOT load cargo in your vehicle-in-tow or on your trailer.
Loading cargo in your vehicle-in-tow or on trailer may result
in sway or WHIPPING.
Before loading your vehicle-in-tow, make sure the trailer is
securely attached to your tow vehicle hitch. Make sure the
safety chains are properly connected. During the loading
process, keep bystanders at least 25 feet away.
Make sure that the entire width of the tires will be on the
ramps before driving on the ramps.
Approach ramps slowly, check angle of machine to insure
proper alignment with trailer, then proceed to drive up
ramps into trailer.
1. Drive the machine forward and align it with the trailer.
2. Unlock and lower the trailer ramps.
3. Drive the machine forward so that the front wheels enter
the trailer channels, and continue driving the machine up
the ramps until the rear drive wheels are on the trailer.
4. Remove the machine tie-down pin from the storage
sleeve on the trailer and insert it through the matching
holes in the machine and the trailer.
5. Raise the trailer ramps and lock them in the travel position
with the lock bars and associated retaining pins.
Secure the Load
Secure the vehichle-in -tow to the trailer with necessary
straps and chains to prevent movement or load shifting
during transport.
Unloading the Machine From the Rayco
Trailer (optional equipment)
1. Remove the ramp lock bar retaining pins, and lower the
loading ramps.
2. Remove the tie-down pin from the bumper of the machine
and store it in the sleeve on the trailer.
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3. Start the engine. (See “Starting the Engine” and “Preoperation Warm up”.)
4. Position the engine throttle on low idle
5. Slowly back the machine off of the trailer, until the machine
is on the ground.
6. To drive the machine, set the engine at the desired speed,
and use the machine controls to steer the machine in
the desired direction.
DO NOT RELEASE OR JERK THE FORWARD/
REVERSE LEVER UNTIL THE MACHINE IS
COMPLETELY UNLOADED, OR THE STUMP CUTTER
MAY TIP OVER IN RESULT.
RG74DXH Operator · Service · Maintenance Manual
Safety
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Operation
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RG74DXH Operator · Service · Maintenance Manual
Operation
Get To Know Your RG74DXH
1. Operator Station
Display Panel LCM
Emergency Stop
Cutter Wheel Engangement
Cutter Wheel Swing
Cutter Wheel Lift
Tongue Expansion, Retract
2. Fuel Tank
3. Telescopic Tongue
4. Hydraulic Tank
5. Radiator / Screen
6. Cutter Wheel
7. Engine
8. Battery
BEFORE OPERATING THIS POWERFUL MACHINE,
PLEASE CONSULT THE SAFETY SECTION FOR
VITAL INFORMATION RELATED TO OPERATING.
NOTICE
To ensure the long life and economical operation of
your stump cutter, we highly recommend that the
operator be well instructed in both the operation
and maintenance of this machine.
Before Operating the Machine
1. Review all of the safety decals that are placed on the
machine for your safety and convenience. See the Parts
manual for locating all decals on the machine.
2. Make sure that all shields and guards are in place, and
in good condition, prior to operating the machine.
3. Only responsible, properly instructed individuals should
operate this machine. Inexperienced operators must
always be carefully supervised.
4. Check the cutting wheel for damaged, worn or missing
teeth, and replace as necessary.
5. Make sure that no one is working on, underneath or close
to the machine before starting the engine or beginning
to move the machine. Make sure that the area is free of
personnel.
6. Check the stumps to be removed for embedded nails,
wire, metal fence posts, and for rocks or other buried
impediments which may become dangerously thrown
or cause unexpected machine movements when
encountered by the cutting wheel.
7. Ensure that everyone in the vicinity is aware of the
DANGER ZONE associated with this machine. (See
diagram above.) Everyone must avoid the DANGER
ZONE at all times when the machine is in operation!
8. Make no alterations or modifications to your Rayco
stump cutter unless requested or recommended by
Rayco Manufacturing Inc.
9. When starting the engine, the machine controls which
cause machine movements must be in the NEUTRAL
or OFF positions, so that machine motion, which may
result in death or severe injury, does not occur.
10. Do not start the engine or move any of the controls if
there is a “DO NOT OPERATE” or similar warning tag
attached to the machine.
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RG74DXH Operator · Service · Maintenance Manual
Operation
Pre-Starting Inspection
NOTICE
To ensure the long life and economical operation of
your stump cutter, we highly recommend that the
operator be well instructed in both the operation
and maintenance of this machine.
Inspect the hydraulic system for leaks. Check the hydraulic
oil level. Inspect the machine and perform each of the “Daily
Inspections” listed in the The Maintenance Manual as needed
before operating this machine.
Starting the Engine
4. Cycle all the controls to allow warm oil to circulate
through all the cylinders and lines.
Operator’s Station
3
2
UNDERSTAND AND HEED TO THE INSTRUCTIONS
LISTED IN THE SAFETY SECTION OF THE MAN UAL.
IN IT’S ENTIRETY, BEFORE OPE RATING STUMP
CUTTER MACHI NE.
NOTICE
DO NOT operate the starter for more than 10
seconds at a time. If the engine does not start, allow
a 60 second cool-down period before re-attempting
to start. FAILURE TO FOLLOW THESE GUIDELINES
MAY CAUSE STARTER MOTOR FAI LURE.
If the key switch (1) is released before the engine starts,
wait until the starter and the engine stops turning before
trying again. This will prevent pos si ble dam age to the starter
and/or flywheel.
If the temperature is extremely cold, it may be necessary to
use cold weather start ing aids. Follow the man u fac tur er’s
recommended procedure when using starting aids.Always
change the hydraulic oil filter at the prop er times. Do not
allow the engine to run with out the filter installed. Failure to
heed either direc tive will result in poor machine performance
and se vere damage.
Pre-Operation Warm-Up
1. Allow the engine to warm up at low idle for two minutes.
2. To warm up the hy drau lic oil, move the engine throttle
to me di um engine speed. Run the engine for about two
minutes while intermit tent ly holding the cutting wheel
raise lever in the RAISE position.
3. Move the engine throttle to the max i mum engine speed. Run
the engine for an addition al two minutes while in ter mit tent ly
hold ing the cutting wheel raise lever in the RAISE position.
This will allow the oil to reach relief pres sure, which
causes it to warm up more rapidly.
1
The operator’s station is mounted on a swing-out arm for
optimum viewing of work while remaining protected. It must
be swung IN during machine transportation. The arm locks
in place, either IN or OUT. For example, to pull the arm (2)
out for machine operation lift the spring loaded locking pin
(3), out of the IN position hole, and swing out the operator’s
station away from the cutting wheel, until the locking pin
springs into the OUT locked position.
The protective curtain is rolled up and held by the flexible
straps for when transporting machine. Unhook straps and roll
out curtain when operating machine. This provides protection
to the lower body.
Machine Controls
4
5
7
8
6
26
(4). Cutting Wheel UP/DOWN Lever Pull to raise cutting
wheel. Push to lower cutting wheel.
(5). Tongue IN/OUT Lever Pull to retract cutting wheel in
(away from stump). Push to extend cutting wheel out
(toward stump).
(6). Cutting Wheel SWING Lever Pull to move cutting
wheel to the left. Push to move cutting wheel to the right.
(7). Cutting Wheel Engagement Switch: To engage the
cutter wheel, flip up the red safety and turn toggle switch
in the “ON” position.
(8).Engine Throttle: To increase or decrease engine rpm’s
press up to increase the engine rpm, or down to decrease
the engine’s rpm’s on the switch.
Other Machine Components
12
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RG74DXH Operator · Service · Maintenance Manual
Operation
settling during transportation and when the machine is not in
use. The pin is installed by the following procedure:
1. With the pin (13) removed, raise the cutting wheel to its
full height, so that the lock pin holes are aligned.
2. Align the pin into the keyhole in the cutting boom and
insert. Rotate the pin to make sure it is securely installed.
To remove the pin, rotate until pin is aligned with the keyhole
and pull out. Store the pin on the engine mount in space
provided (14).
Trailer Hitch
The trailer hitch provides a means of securing the machine
to a towing vehicle (most commonly, a pickup truck) in such
a way as to allow for a wide range of pivoting due to turning,
uneven ground, and hills. See the “Transporting the Machine”
section for instructions on how to use it.
Safety Chains
The safety chains provide a backup to the hitch. See the
“Transporting the Machine” section for instructions on how
to use them.
Electric Cable Receptacle
The electric cable receptacle (12) is a quick-connect station
to enable operating brakes and tail lights in conjunction with
those of the towing vehicle.
10
Telescoping Tongue Lock-Pin
Lock-pin (10) must be removed prior to operation to allow
the tongue to extend and retract. It may be stored in the
hole shown (11) when not in use. The lock-pin must then
be reinserted as shown prior to transporting the unit. Always
insert retaining pin into hole in end of lock-pin.
Cutting Boom Lock Pin
14
13
The cutting boom lock pin prevents the cutting boom from
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RG74DXH Operator · Service · Maintenance Manual
Operation
Electric Brake System
This machine requires periodical adjustments to the electric
brakes on all wheels.
Brake Operation:
1. When electrical current is supplied to the system
controller, it flows through the electromagnets in the
brakes.
2. The electromagnets are energized and are attracted to the
rotating armature surface of the drums which moves the
actuating levers in the direction that the drums are turning.
3. This resulting force causes the actuating cam block at the
shoe end of the lever to push the primary shoe out against
the inside surface of the drum. The force generated by
the primary shoe acting against the adjuster moves the
secondary shoe out into contact with the brake drum.
4. Increasing the current flow to the electromagnet causes
the magnet to grip the armature surface of the brake
drum more firmly. This results in increasing the pressure
against the shoes and brake drums until the desired
stop is accomplished.
Use of Electric Braking System:
1. The brakes are designed to work in synchronization with
your tow vehicle brakes.
NEVER Use your tow vehicle alone to stop the combined load!
2. Your brake controller must be set according to the
manufacturer’s recommendations to ensure proper
synchronization between the tow vehicle and the trailer.
Additionally, you may have to make small adjustments
occassionally to accommodate changing loads and
driving conditions.
3. Proper synchronization of tow vehicle to trailer braking
can only be accomplished by road testing. Brake lockup,
grabbiness, or harshness is quite often due to the lack
of synchronization, too high of threshold voltage (over
2v), or under adjusted brakes.
4. Before any synchronization adjustments are made, the new
brakes should be burnished-in by applying the brakes
20-30 times with approximately a 20 mph decrease in
speed (e.g. 40mph down to 20mph). This allows the
brake shoes and components to wear-in.
5. To insure safe brake performance and synchronization,
read the brake controller manufacturer’s instructions
completely before attempting any synchronization
procedure.
BEFOR E ROAD TESTING, MAKE SU RE THE AREA
IS CLEAR OF VEHICU LAR AND PEDE STRIAN
TRAFFIC. FAILURE TO BRAKE SAFELY COULD
RESULT IN ACCIDENT AND PERSONAL INJURY, OR
INJURY CAUSED TO OTHERS.
6. Make several hard stops from 20mph on a dry paved
road free of sand and gravel. If the trailer brakes lock
and/or slide, decrease the gain setting on the controller.
If they do not lock and/or slide, then slighty increase
the gain setting. Adjust the controller just to the point
of impeding brake lockup and wheel skid.
7. If the controller is applying the trailer brakes before the tow
vehicle brakes, then the controller adjustments should be
made so the trailer brakes come on in synchronization with
the tow vehicle brakes.For proper braking performance,
it is recommended that the controller be adjusted to
allow the trailer brakes to come on slightly ahead of
the tow vehicle brakes. When proper synchronization
is achieved there will be no sensation of trailer “jerking”
or “pushing” the tow vehicle during braking.
28
Starting With Jumper Cables
NOTICE
Before attempting to start an engine that has been
in storage, check that all fluids are topped off and
clean.
DO NOT ALLOW JUMPER CABLE CLAMPS TO
TOUCH THE OTHER SOLENOID TE RMI NAL.
UNCONTROLLED STARTING OF THE ENG INE
WOULD OCCUR, WH ICH COULD CAUSE SEVERY
INJURY OR DEATH!
1. On the stalled machine, turn the start switch to OFF.
2. Move the boost machine near enough to the stalled
machine for cables to reach, but DO NOT ALLOW THE
MACHINES TO TOUCH.
3. Stop the engine on the boost machine.
4. Open the battery covers of both machines to purge
flammable fumes.
5. Remove all of the battery caps from the batteries (if not
maintenance-free type) on both machines, allowing
explosive vapors to disperse.
6. Connect jumper cables:
a. Connect the red positive (+) jumper cable to the
positive (+) terminal of battery of the stalled machine,
where the battery red positive (+) cable is already
connected. (Pull back rubber boot to gain access.)
b. Connect the other end of the red positive (+) jumper
RG74DXH Operator · Service · Maintenance Manual
Operation
cable to the positive (+) terminal of the battery of the
boost machine.
c. Connect the black negative (-) jumper cable to the
negative (-) terminal of the boost machine battery.
d. Connect the other end of the black negative (-) jumper
cable to the negative post of the stalled machine, where
the battery black negative (-) cable is already connected.
7. Start the engine on the boost machine and allow it to
run at high idling speed for about ten minutes. This will
partially charge the stalled engine’s battery.
8. Start the stalled engine.
9. Immediately after st arting the stalled engine, disconnect
the jumper cables, in reverse order.
10. Reinstall the battery caps and battery covers.
11. After completion of the above procedure, perform failure
analysis on the starting/charging system of the stalled
machine as required.
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2
4
1
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RG74DXH Operator · Service · Maintenance Manual
Operation
Removing Stumps
Call 8-1-1 Before You Dig (USA Only)
BEFORE ENGAGING THE CUTTER WHEEL, THE
OPERATOR MUST ENSURE THE AR EA IS CLEAR
OF ANYONE OR ANYTHING THAT MAY BE HARMED
BY THE CUTTER WHEEL, OR FLYING DEBRIS.
THE STUMP CUTTER’S CUTTING WHEEL IS
EXTREMELY POWERFUL. CONTACT WITH THE
CUTTING WHEEL WILL RESULT IN SERIOUS
INJURY OR DEATH.
NOTICE
The speed at which the blade moves is dependant
on the position of the throttle. To increase the rate
of blade movement, increase the engine RPM’s by
adjusting th throttle higher. Decrease the engine
RPM’s to decrease the rate of blade movement.
Cutting Wheel Precautions
• NEVER go near the cutting wheel when the machine is
turned on. Turn off the machine first.
• Always cut with the machine downhill, below the stump.
• Use extreme caution on slopes. Slopes, combined with
less than ideal traction (ice, snow, gravel, leaves, wet
grass) can allow the machine to move unexpectedly.
NOTICE
Only the portion of cutting wheel within the 80°
area shown above should engage stump. Never
undercut the stump or use the bottom of the
cutting wheel for cutting purposes.
NEVER LEAVE THE CONTROLS WHEN THE
CUTTING WHEEL IS ROTATING.
NOTICE
Remove all loose pieces of wood, stones, wire and
other debris from the work area before beginning
stump removal.
NOTICE
Wind direction should be considered, as it
influences the direction that dust and wood chips
will be directed.
NOTICE
Always allow a cold engine time to warm-up before
cutting a stump.
NOTICE
When swinging the cutting wheel, DO NOT use
the cutting wheel or boom to stop the swinging
motion. Inspect the machine for damage if the
boom as been swung too hard into the stump or
side of a hole.
30
Swing Speed Manual Adjustment
a
The needle valve (a) is used to further adjust the flow of the
Command Cut®valve. To adjust, turn the knob clockwise to
increase the swing speed. To reduce swing speed, turn the
adjustment knob counter clockwise.
Stump Removal Procedure
1: Prepare the machine at the stump:
RG74DXH Operator · Service · Maintenance Manual
Operation
• Continue repeating this procedure until all of the amount
of stump in the path of the downward swing of the
cutting wheel is gone.
4: Cut another level of the stump:
• Drive the machine into position with the cutting wheel
near the top edge of the stump.
• Move the engine throttle to IDLE.
• Start cutting wheel rotation
• Increase the engine to increase the cutter wheel.
2: Remove the roots:
• Swing the cutting wheel to one side, then lower it into
the nearside roots that may be buried at the foot of the
stump, and swing the cutting wheel across them until
they are sufficiently removed
3: Cutting the stump properly:
• Raise the cutting wheel to the top of the stump and
advance the machine to a combined position where
the center of the shaft remains just above the top of
the stump, such that upon swinging the cutting wheel,
a bite approximately 4” deep may be taken.
• Sweep the cutting wheel across the stump, taking an
approximately 2.75” deep bite.
• After the first bite is taken, lower the cutting wheel about
2” while is off to the side and swing the cutting wheel
across for another bite.
• Raise the cutting wheel above the stump once again,
and starting with the cutting wheel swung to one side,
advance the machine slightly (about 2”) and repeat
STEP 3.
• Cut the remaining roots as described in STEP 1 until
the entire stump is satisfactorily removed.
• After the stump has been fully removed, stop the cutting
wheel rotation. Raise and center the cutting wheel.
• Machine is ready for travel to the next destination
6: Once the Stump is completely cut:
• Reduce the throttle to IDLE and shut off the cutting
wheel rotation.
• Stop the cutting wheel rotation quickly by gently lowering
the cutting wheel into the soil.
• Fully raise and center the cutting wheel. The machine may
then be self-propelled to the next destination
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RG74DXH Operator · Service · Maintenance Manual
Operation
Stopping The Machine
DUE TO HIGH SPEED LOWFRICTION ROTATION,
THE CUTTING WHEEL MAY CONTINUE TO ROTATE
UNNOTICED, EVEN AFTER THE ON/OFF SWITCH
HAS BEEN FLIPPED OFF, AND EVEN AFTER THE
ENGINE HAS STOPPED. BE SURE THE CUTTING
WHEEL COMES TO A COMPLETE STOP BEFORE
MOVING THE MACHINE OR LEAVING THE
CONTROLS!
1. When stopping the machine after normal operation,
lower the engine speed to SLOW, and cycle each of
the hydraulic controls slowly for about 30 seconds each
to help the hydraulic com po nents to cool slowly.
2. Flip the cutting wheel O N/OFF Switch down to the OFF
position, stopping the cutting wheel rotation.
3. Stop the cutting wheel rotation quickly by gently lowering
the cutting wheel into the soil.
4. Reduce the engine speed.
Engine Stopping
NOTICE
Before stopping an engine that has been operating
at working load, allow the engine to continue to run
with the throttle midway between slow and fast, for
at least 15 seconds.
1. Reduce the engine speed to IDLE.
2. Turn the engine start switch to the OFF position to stop
the engine. Remove the engine start key.
Parking The Machine
Park on a level surface if possible. If it is necessary to
park on a grade, block the tracks securely. Do not park
sideways on a hill, side-sliding could occur.
• Lower the engine speed control slightly to reduce
engine rpm.
• Center the cutter boom, using the joystick.
• Turn off the cutter wheel by using the cutter wheel
switch on the remote until the cutter wheel comes to
a complete stop.
• Lower the attachment slowly with the boom down switch
on the remote until the cutting wheel rests on the ground.
Machine Storage
Preparing for Storage
Store the machine in a dry protected place. If the machine
must be stored outside, cover it with a waterproof canvas
or other material.
Clean all grease, dirt, mud and other foreign matter from the
machine. Wash the machine. Start and operate machine to
help rid it of puddled or excess water. To inhibit rusting, paint
all exposed surfaces.
All exposed hydraulic cylinder rods should be coated with
Valvoline Tectyl 50 6 oil or equivalent. Rusty or pitted cylinder
rods will dam age O-Rings and cause leakage.
Lubricate all parts that have grease fittings, as outlined in the
“Maintenance Intervals” section of the Maintenance manual,
to prevent rust.
Store the battery inside where temperatures do not drop
below 32° F. Place the battery on wood, not on a concrete
floor or steel table. Always keep the battery fully charged.
DO NOT store where an open flame or sparks might occur.
Check your machine for any worn or broken parts at this
time. By ordering replacement parts now, you can avoid
unnecessary delays when you remove the machine from
storage.
1. Store the machine in a flat place and remove the key
from the engine.
2. Do not store the machine in a place that has flammable
material such as dry grass or straw.
3. When covering the engine for storage, allow the engine
and muffler to cool off completely.
4. Operate the engine after checking and repairing damaged
wirings or pipes, and clearing flammable materials that
may have accumulated while in storage (such as debris
brought in by mice).
Removal from Storage
• Remove all coverings. Wipe excess oil from hy drau lic
cylinder rods.
• Lubricate machine entirely, as instructed in the
“Maintenance Intervals” section of this manual.
• Check the hydraulic hoses and fuel lines for deterioration,
and replace as necessary.
• Tighten all nuts, bolts and hydraulic fittings.
• Replace the hydraulic filter and fuel filter. After prolonged
storage, change the hydraulic oil, engine oil, and fuel (if
a storage aid was not used).
• Mount the battery and connect the cables to the machine.
• Review the machine according to the “Before Start ing the
Engine” as found in the “Safety” section of this manual,
and perform all maintenance services necessary as described in the Maintenance section’s “10 Service Hours
or Daily” section before starting the engine.
• Start the machine according to the “Starting the Engine”
and “Pre-Operation Warm-up” sections of this manual
32
RG74DXH Operator · Service · Maintenance Manual
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RG74DXH Operator · Service · Maintenance Manual
Lubrication & Fluid Specifications
RAYCO LUBRICATION & FLUID SPECIFICATIONS
Engine Oil
During the initial break-in period, the engine will consume more oil than usual. Check the engine oil level daily.
ONLY USE CH-4 (or better) CLASSIFICATION OILS WITH A 10 TBA OR HIGHER.
See the Engine Operator Manual for engine lubricating oil specifications.
Fuel - Diesel Engine
See the Engine Operator Manual for engine fuel specifications. ALWAYS USE
DO NOT USE FUELS WITH SULFUR CONTENT HIGHER THAN ULSD (Ultra Low Sulfer Diesel)
ULTRA LOW SULFUR DIESEL FUEL ONLY
0.015% (15ppm
.
Hydraulic Oil
Your machine is filled at the factory with Conoco Megaflow AW HVI 46 Hydraulic Fluid. This oil is formulated to provide the proper operating
characteristics in a wide range of climates. When refilling, always use Conoco Megaflow AW HVI 46 or one of the recommended brands below.
Failure to use the proper hydraulic oil can lower performance and shorten the life of critical components.
Oil specifications address the following concerns
• High-temperature viscosity
• Low-temperature flow properties
• Viscosity lifespan
• High-pressure wear characteristics
• Filterability
• Multi-metal compatibility in the presence of water
We recommend the following hydraulic oils for your machine:
Conoco-Phillips MegaFlow AW HVI 46
Shell Tellus T 46
Mobil DTE 15M
Exxon Univis N 46
Pennzoil Pennzbell AWX MV 46
If choosing an oil other than those recommended above, the following specifications should be used:
• Kinematic Viscosity: 7 cSt (
• Pour point: -35° F (-37° C) or colder
• Viscosity stabilizers, excellent resistance to viscosity breakdown (shear).
• Anti-wear, Anti-foam formulation, for use in all pump types at all pressures.
• Low-zinc additives; zinc levels should not exceed .08% of total weight
Clean hydraulic oil is critical to achieve high performance and get long life from your hydraulic system. The oil and filter should be changed in
accordance with the instructions contained in the “Maintenance Intervals” section of your manual. The hydraulic oil should be changed immediately if it
appears dirty or smells burnt.
(Petroleum-Mineral Base)
different types of hydraulic fluids!
DON’T MIX
:
……….…..Viscosity 7.7 cSt @ 100°C / 46 cSt @ 40°C / Pour Point -45°C (-49°F)
(new name:
…………………………………………Viscosity 7.8 cSt @ 100°C / 46 cSt @ 40°C / Pour Point -42°C (-43°F)
…………………………………….Viscosity 8.2 cSt @ 100°C / 46 cSt @ 40°C / Pour Point -48°C (-54°F)
Tellus S2 V46
………………….…Viscosity 8.8 cSt @ 100°C / 46.3 cSt @ 40°C / Pour Point -48°C ( -54°F)
) @ 100°C / 42-50 cSt @ 40°C
min
)…....Viscosity 7.95 cSt @ 100°C / 45.9 cSt @ 40°C / Pour Point -42°C (-43°F)
Biodegradable Hydraulic Oil
Panolin HLP Synthetic Ester Base VG46 is the only approved Bio-Degradable Hydraulic oil for this machine. All mineral base oils must be
completely drained out of system and components before refilling with Panolin HLP Synthetic VG46 Bio-degradable oil.
Panolin HLP Synthetic Ester VG46
34
.………………….Viscosity 8.1 cSt @ 100°C / 47 cSt @ 40°C / Pour Point -57°C (-70°F)
RG74DXH Operator · Service · Maintenance Manual
Track Drive Oil
The track drives should be filled with a Synthetic 75W-90 heavyduty gear oil. This oil should have anAPI service classification of GL-5 which has an extreme pressure additive. A synthetic 75W-140 or 80W-140 heavyduty GL-5 gear oil could also be usedinwarm climates to extend gear life.
MWF Hydrostat Drive
The Hydrostat drive is shipped withMobil 1 synthetic engine oil, SAE 15W-50.Do not mix hydrostat and different lubricants!
The DifferentialGearbox is shipped with 80-90W performance gear oil.Use this fluid or comparable typewhen refilling.
Lubrication & Fluid Specifications
Lubricating Grease
All machines are completely serviced at the factory before shipping. The operator should check all grease fittings to familiarize with the
location and correct service schedule plan.
Use the normal shutdown procedure (See “Operating Instructions”), before lubricating the machine.
Apply grease using a standard low pressure/low volume grease gun. Do not use a pneumatic grease gun.
Lubricate with a high quality NLGI No.2 multipurpose bearing grease having rust inhibitors, good water resistance, antioxidant additives, and a
minimum viscosity of 150 cSt at 40°C
We recommend the following bearing grease that meets this spec:
Chevron Delo EP2
……………....189 cSt @ 40°C / 17.5 cSt @ 100°C / Temperature range -40°C to 177°C (-40°F to 350°F)
Texaco Multifak EP2
Citgo Premium Lithium EP2
Shell Alvania EP2
Note: for extreme cold temperature areas a No. 0 grade grease may be used.
Before lubricating make sure all grease fittings and the nozzle of the grease gun is clean.
Cold Weather Lubricants
Before attempting to start the engine, make sure that the oil in the engine, the transmission and the hydraulic system are fluid enough to
flow. Check the oil by removing the dipsticks. If the oil will drip from the dipstick, then the oil is fluid enough to start the engine. Do not use
oil that has been diluted with kerosene. Kerosene will evaporate in the engine. Hydraulic and track drive oil should meet all previous
specifications and have a pour point at least 7.8°C (14°F) lower than the coldest expected ambient temperature.
If the viscosity of the oil is changed for colder weather, also change the filter element. If the filter is not changed, the filter element and the filter housing
can become a solid mass. Drain all hydraulic cylinders and lines. After you change the oil, operate the equipment in order to circulate the thinner oil.
ENGINE-
If continuous ambient operating temperatures are below -10°C (+14°F), oil change intervals should be increased. Consult the Engine
•
When you start an engine or when you operate an engine in ambient temperatures that are below -20°C (-4°F), use base oils that can flow
•
When you start an engine or when you operate an engine in ambient temperatures that are below
•
…….………….189 cSt @ 40°C / 15.6 cSt @ 100°C / Temperature range -20°C to 100°C ( -4°F to 212°F)
Operator Manual for details.
in low temperatures. These oils have lubricant viscosity grade of SAE 0W or SAE 5W.
-30°C (-22°F), use a Synthetic base stock multigrade oil. The oil should have lubricant viscosity grade of 0W or 5W. Use an oil with a pour
point that is 5-10 degrees lower than the coldest ambient temperature.
and suitable to operate continuously at 212°F / 100°C or higher.
………….…173 cSt @ 40°C / 15.6 cSt @ 100°C / Temperature range -34°C to 121°C (-30°F to 250°F)
…..173 cSt @ 40°C / 14.9 cSt @ 100°C / Temperature range -15°C to 121°C ( 5°F to 250°F)
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RG74DXH Operator · Service · Maintenance Manual
Specifications
COOLANT SPECIFICATIONS
Coolant / Antifreeze Recommendations for GM Powered Machines
ACDelco DEX-COOL® ANTIF REEZE /COOLANT is a universal engine coolant, which incorporates a patented carboxylate
inhibitor technology. This coolant meets both ASTM D 3306 for automotive service and ASTM D 4985 for heavy-duty diesel
service. It is a nitrite-, nitrate-, phosphate-, silicate-, borate and amine-free formulation which uses a patented carboxylate
technology to provide maximum protection of the six basic metal alloys found in
most heat transfer systems. Since the coolant contains no phosphates or silicates, hard water deposits in the cooling system
are almost eliminated. The low level of abrasive dissolved solids in ACDelco DEX-COOL® ANTIFREEZE/COOLANT
results in improved water pump seal life.1
Your GM powered machine is filled at the factory with GM approved coolant under the GM6277M specification. Rayco
does not warrant use [or mixing] of any other glycol-based coolant in your GM engine. DEX-COOL® is orange in color to
distinguish it from other coolants. Due to inconsistencies in the mixing of the dyes used with DEX-COOL®, some batches
may appear pink after time. The color shift from orange to pink does not affect the integrity of coolant and still maintains the
recommended use-life of the coolant2.
The coolant specification addresses the following concerns:2
• Provides effective, long term corrosion protection for aluminum, brass, cast iron, steel, solder and copper.
• Protects against winter freeze up and minimizes the chance of summer boil over
• Compatible with water pump seal materials and minimizes the formation of abrasive dissolved solids.
• Storage stable for at least eight years.
• 100% biodegradable in its pure unused form.
• Excellent heat transfer properties.
• Nitrite, borate, phosphate, nitrate, and amine free.
• Outstanding hot surface aluminum protection
• Superior protection in high operating temperatures
We recommend the following coolant type for your machine:
• Pre-mixed Extended Life Coolant which meets the GM6277M specification....34°F @ 50% mix / -62°F @ 60% mix
• Diluted [distilled water] Extended Life Coolant which meets the GM6277M specification....-34°F @ 50% mix / -62°F
@ 60% mix
Coolant Maintenance:
• Maintain freeze point between -15°F and -62°F. A 50% mixture has a freeze point of -34°F (refer to freeze point above).
• Use commercially available test strip to test coolant performance at least twice a year .
• Top up low coolant systems with a 50% mixture as required.
• Follow the engine OEM procedures when doing a complete change-out.
Make Proper Antifreeze Additions
Adding pure antifreeze as a makeup solution for cooling system top-up is an unacceptable practice. It increases the
concentration of antifreeze in the cooling system which increases the concentration of dissolved solids and undissolved
chemical inhibitors in the cooling system. Add antifreeze mixed with water to the same freeze protection as your cooling system.
Use the chart below to assist in determining the concentration of antifreeze to use.
NOTICE: The use of additives or Replenishing Supplement Coolant Additives (SCA’S) is not recommended in
conjunction with DEX-COOL® Coolant.
DEX-COOL®Coolant (equiv) Protection Temperature (w/ 15 psi cap)Concentration
Boiling Protection to -129.4°C (265°F)50% antifreeze and 50% water
Freeze Protection to -24.4°C (-12°F)40% antifreeze and 60% water
Freeze Protection to -36.7°C (-34°F)50% antifreeze and 50% water
Freeze Protection to -52.2°C (-62°F)60% antifreeze and 40% water
36
RG74DXH Operator · Service · Maintenance Manual
Specifications
Torque Specifications
General Torque Information
Mismatched or incorrect fasteners can result in damage or malfunction, or possible injury.
Take care to avoid mixing metric dimensioned fasteners and inch dimensioned fasteners.
Exceptions to these torques are given in the Maintenance Section, if necessary.
Prior to installation of any hardware, ensure that components are in near new condition. Bolts and threads
must not be worn or damaged. Threads must not have burrs or nicks. Hardware must be free of rust and
corrosion. Clean the hardware with a noncorrosive cleaner.
Do not lubricate the fastener threads except for the rust preventative. The rust preventative should be
applied by the supplier of that component for purposes of shipping and storage.
Other applications for lubricating components may also be specified in the Maintenance Section.
SAE & Metric Bolt Torque Requirements
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RG74DXH Operator · Service · Maintenance Manual
Troubleshoot
ONLY PROPERLY TRAINED PE RSONNEL SHOULD PERFOR M MAINTENANCE OR REPAIR OF THIS EQUIPM ENT.
CONSU LT RAYCO MANUFACTURIN G TO PERFORM ANY MAI NTENANCE THAT IS NOT COVERE D IN THIS MAN UAL.
IMPROPER MAINTENANCE OR R EPAIR MAY VOID ANY WARRANTIES ON THIS EQUIPMENT.
• Improper maintenance or repair COULD result in equipment damage or personal injury.
• Always remove ignition keys from the ignition and perform “LOCK-OUT-TAG-OUT procedures before performing any
maintenance on this machine.
Hydraulic System Troubleshooting
PROBLEMCAUSESOLUTION
No hydraulic fluid.
No hydraulic power.
Slow hydraulic power.
Oil foams.
Lack of engine power.
Damaged or worn hydraulic
pump.
Relief valve damaged.
Low hydraulic fluid level.
Plugged hydraulic filter.
Worn pump.
Improper pressure relief setting.
Hydraulic fluid cold.
Low hydraulic fluid level.
Water in hydraulic fluid.
Air leak between tank and pump.
Wrong fuel.
Dirt or water in fuel system.
Air in fuel system.
Fill with fluid.
See your Rayco dealer.
Add hydraulic fluid.
Replace filter.
See your Rayco dealer.
See your Rayco dealer.
Let machine warm up and operate
hydraulic system.
Add hydraulic fluid.
Change fluid.
Repair leak.
Use correct fuel.
Remove fuel, clean tank, and replace.
Remove air from fuel system.
Drive System Troubleshooting
PROBLEMCAUSESOLUTION
Swing rate is too fast
Engine Stalls When Grinding
Polybelt Is Noisy While GrindingBelt is loose or wornAdjust or replace belts.
Too deep of a cut
Command-Cut not working
Use Command-Cut Feature
Reduce cutting depth for material
(See your RAYCO Dealer)
38
Power System Troubleshooting
PROBLEMCAUSESOLUTION
Engine hard to start or will
not start.
Lack of engine power.
Low battery output.
Low battery charge.
RG74DXH Operator · Service · Maintenance Manual
No fuel.
Wrong fuel.
Leak in fuel line.
Dirt or water in fuel system.
Air in fuel system.
Fuel filter is dirty.
Wrong weight engine oil.
Restricted air filter.
Injectors dirty.
Operating at high elevation
Wrong fuel.
Dirt or water in fuel system.
Air in fuel system.
Fuel filter is dirty.
Wrong weight engine oil.
Restricted air filter.
Injectors dirty.
Low engine compression.
Engine is too hot.
Overcharged battery.
Defective battery cell.
Cracked battery case or broken
terminal.
Dirty or wet battery top, causing
discharge.
Loose or glazed alternator belt.
Alternator not charging.
Loose or corroded battery cables.
Defective battery cell.
Troubleshoot
Add fuel.
Use correct fuel.
Check fuel line and connection.
Remove fuel, clean tank, and replace
fuel filter.
Remove air from fuel system.
Replace fuel filter.
Use correct oil.
Clean or replace air filter.
See your Rayco dealer.
Ensure map sensor (manifold absolute
pressure sensor) is in good working
order
Use correct fuel.
Remove fuel, clean tank, and replace.
Remove air from fuel system.
Replace fuel filter.
Use correct oil.
Clean or replace air filter.
See your Rayco dealer.
See your Rayco dealer.
See your Rayco dealer.
Clean and tighten battery cables.
Replace battery.
Clean battery top.
Tighten or replace belt.
See your Rayco dealer.
Clean and tighten battery cables.
Replace battery.
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RG74DXH Operator · Service · Maintenance Manual
Maintenance
Certified Engine Maintenance
Proper maintenance and repair is essential to keep the
engine and machine systems operating correctly. As the
heavy duty off-road engine owner, you are responsible
for the required maintenance listed in the Engine Owner
Manual & Machine Operator, Maintenance & Service Manual.
Attach a “Do Not Operate” warning tag or a similar warning
tag to the start switch or to the controls before you service
the equipment or before you repair the equipment.
Know the width of your equipment in order to maintain
proper clearance with you operate the equipment near
fences or near boundary obstacles.
Be aware of high voltage power lines and power cables
that are buried. If the machine comes in contact with these
hazards, serious injury or death may occur from electrocution.
Wear a hard hat, protective glasses, and other protective
equipment, as required.
Do not wear loose clothing or jewelry that can snag on controls or on other parts of the equipment.
Make sure that all protective guards and all covers are secured in place on the equipment.
Keep the equipment free from foreign material. Remove
debris, oil, tools, and other items from the deck, from walk-
ways, and from steps.
Secure all loose items such as lunch boxes, tools, and other
items that are not a part of the equipment.
Know the appropriate work site hand signals and the personnel that are authorized to give the hand signals. Accept
hand signals from one person only.
Do not smoke when you service an air conditioner. Also,
do not smoke if refrigerant gas may be present. Inhaling
the fumes that are released from a flame that contact air
conditioner refrigerant can cause bodily harm or death. Inhaling gas from air conditioner refrigerant through a lighted
cigarette can cause bodily harm or death.
Never put maintenance fluids into glass containers. Drain
all liquids into a suitable container.
Obey all local regulations for the disposal of liquids.
Use all cleaning solutions with care. Report all necessary
repairs.
Do not allow unauthorized personnel on the equipment.
Unless you are instructed otherwise, perform maintenance
with the equipment in the servicing position. Refer to Operation and Maintenance Manual for the procedure for placing the equipment in the servicing position.
When you perform maintenance above ground level, use
appropriate devices such as ladders or man lift machines.
If equipped, use the machine anchorage points and use approved fall arrest harnesses and lanyards.
40
CALIFORNIA
Proposition 65 Warning
Diesel engine exhaust and some of its constituents are
known to the state of California to cause cancer, birth
defects, and other reproductive harm.
NOTICE:
Maintenance and Repairs should
ONLY be performed by a trained
specialists or qualified person.
Please contact Rayco Mfg for a
listing of approved maintenance
facilities in your area.
RG74DXH Operator · Service · Maintenance Manual
Maintenance
Daily or Every 10 Hrs Maintenance Interval
Walk Around InspectionSee list
Engine Oil LevelCheck & Replace if needed
Engine Coolant LevelCheck
Air Cleaner Filter & IndicatorCheck
Hydraulic OilCheck
Fuel TankCheck & Fill if needed
Fan BeltCheck
Grease & Oil BuildupRemove
Emergency Saftey StopCheck
HitchCheck
Wheel, Tire & Lug NutsCheck
Brake SystemCheck
Fuel Pre-FilterCheck
Engine LeaksCheck
Radiator ScreenClean
Cutter Wheel BearingsLubricate
Cutting WheelCheck Teeth
Swing PivotInspect
Fuel System Water SeperatorDrain
Engine Belt DrivesCheck
Brake SystemCheck & Adjust
Cutting Wheel PolyBeltCheck & Adjust
Pump Mounting BoltsCheck
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RG74DXH Operator · Service · Maintenance Manual
Maintenance
Maintenance Log
Date of Service Machine HoursDescription of Service/ MaintenanceNotes
42
RG74DXH Operator · Service · Maintenance Manual
Maintenance
Maintenance Log
Date of Service Machine HoursDescription of Service/ MaintenanceNotes
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RG74DXH Operator · Service · Maintenance Manual
Maintenance
Maintenance Intervals
BEFORE PERFORMING ANY MAINTENANCE,
PLEASE CONSULT THE “SAFETY” SECTION FOR
VITAL INFORMATION RELATED TO OPERATING
THIS POWERFUL MACHINE!
The maintenance section is a guide to equipment care. The
Maintenance Interval Schedule on the previous pages lists
the items to be maintained at a specific service interval. These
items are listed with step-by-step instructions required to
accomplish the scheduled maintenance are detailed on the
following pages.
Use the Maintenance Interval Schedule as an index for all
maintenance procedures.
Determining Maintenance Intervals
Use the service hour meter to determine servicing intervals.
Calendar intervals shown (daily, weekly, monthly, etc.) can be
used instead of service hour meter intervals if they provide
more convenient servicing schedules and approximate the
indicated service hour meter reading. Recommended service
should always be performed at the interval that occurs first.
Under extremely severe, dusty or wet operating conditions,
more frequent lubrication and filter replacement than
is specified in the maintenance intervals chart might be
necessary.
Perform service on items at multiples of the original
requirement. For example, at every 500 service hours or
3 months, also service those items listed under every 250
service hours or monthly and every 10 service hours or daily.
Walk-Around Inspection
For maximum service life of the machine, make a thorough
walk-around inspection. Inspect the machine for the following:
• Loose Bolts
• Trash Buildup
• Oil Leaks
• Broken Parts
• Worn Parts
Inspect the overall condition of the machine and its hydraulic
components.
Check the engine oil level, the hydraulic oil level, and
the fuel level, before operating the machine each use.
Engine Oil Level
NOTICE
Check only when the machine is in a level position.
1
The engine oil dipstick (1), is located on the right side of the
engine as shown above. The engine oil cap (2) is located on
the top of engine as shown. During the initial break-in period,
the engine will consume more oil than usual. Check the oil
level daily. Low oil level can cause severe engine damage.
Changing the Engine Oil
2
3
44
1. Place an oil catch pan under the oil drain plug (3) under
the engine. Remove the drain plug and drain the oil. Use
an approved container to store used oil. Remove the oil
fill cap (2) (to aid in draining).
4
2. Using a filter wrench, remove the oil filter (4) and replace
with a new oil filter (See service parts list). Apply a light
coat of oil to the seal of the filter.
3. Replace and tighten the oil drain plug (3) underneath
the engine.
5
RG74DXH Operator · Service · Maintenance Manual
Maintenance
Fuel Tank - Check Level, Fill & Drain
DIESEL FUEL IS HIGHLY COMBUSTIBLE. DO
NOT SPILL IT ON THE ENGINE. LET THE ENGINE
COOL BEFORE REFUELING. DO NOT SMOKE
OR ALLOW ANY HOT OBJECTS NEARBY WHEN
REFUELING.
8
7
The Fuel tank (7) is located near the rear of the machine as
shown above. The fill cap (8) is located just above the tank.
To fill the fuel tank, loosen and remove the fuel cap and
carefully fill the tank with “DIESEL FUEL” only. Once tank
is full, replace fuel cap and tighten securely.
Note: ALWAYS use Ultra Low Sulfer Premium Diesel Fuel.
Fuel Filter - Change To Purge
4. Add 2.8 gallons of oil to the engine by using a funnel so
it does not spill oil on the engine. For ease of access,
there is hole (5) located directly above the engine oil
fill. Place drain end of funnel down through the hole and
into the fill port as shown.
5. Check the dipstick (1), and top off the engine oil to the
uppermost line (6) on the dipstick.
6
6. Once engine oil level shows full, replace engine oil fill
cap (2), and tighten securely.
NOTICE
Always check the engine maintenance manual for
any additional steps that may be required.
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9
Change the fuel filter (9) as described in the “Service and
Maintenance” section of the Cummins Engine Maintenance
Manual.
45
RG74DXH Operator · Service · Maintenance Manual
Maintenance
Fuel Tank - Drain
NOTICE
Dispose of any drained fuel according to local
environment protection regulations.
1
1. Clean the fittings and tank.
2. Place the machine on level ground.
3. Expand the tracks out.
4. Place a cont ainer on the ground under the fuel tank drain
plug (1). The drain plug is located below the fuel tank.
5. Remove the plug and fuel cap and allow the fuel to drain
into the container.
6. Replace and tighten the drain plug.
Fuel System Water Separator Drain
Fuel System Water Separator Element
Element replacement frequency is determined by the
contamination level in fuels. Fuel flow to the engine becomes
restricted as the element gradually plugs with contaminants,
resulting in noticeable power loss and/or hard starting.
When any one of these occurs, change the element as soon
as possible. Always carry an extra replacement element (See
service parts), as one tankful of contaminated fuel can plug a
fuel filter. For instructions regarding the element replacement
see your Cummins Engine Manual.
Hydraulic Oil - Check & Fill
KEEP INSI DES OF ALL HYDRAULIC COMPON ENTS
CLEAN AS THEY ARE IN STALLED.
ALWAYS KEEP THE HYDRAULIC OIL CLEAN.
SEVERE MACHINE DAMAGE WILL LIKELY OCCUR
IF OIL BECOMES DIRTY.
THE MACHINE MUST NOT BE OPERATED WITHOUT
THE FILTER IN PLACE, OR SEVERE DAMAGE TO
THE MAJOR HYDRAULIC COMPONENTS WI LL
LIKELY OCCUR.
6
4
2
Water is heavier than diesel fuel and will settle to the bottom
of the bowl. WITH THE ENGINE OFF, drain the water by
opening the self-venting drain valve (2) and allowing all water
to escape. Drain the fuel/water with appropriate container and
dispose of according to local regulations, and enviromental
protection laws. Close the drain and reprime the element as
described in the Cummins Manual.
46
5
3
7
The hydraulic oil tank(3) and fill neck (4) are located at the
rear of the machine as shown above. Check your hydraulic
oil level daily before use. Check the oil level only when the
machine on level ground. The oil level sight gauge (5) is
located on the tank’s rear face.
Hydraulic Oil - Drain
1. Clean the fittings and tank.
2. Place the machine on level ground.
6
3. Place a container on the ground below the hydraulic
drain plug (6)
4. Remove the breather cap to allow airflow to assist in
draining. Place in a container and allow the oil to drain
into the container.
5. Loosen the hose fittings on the cylinders, and drain as
much fluid as feasible.
6. Replace and tighten the fittings.
Re-fill the hydraulic oil tank
1. Clean all surrounding debris and dirt off of the tank fill
opening area. (Hydraulic fluid must be kept completely
clean!)
2. Remove the breather/fill cap.
3. Fill the tank until oil the level reaches the appropriate
level as shown on the oil level gauge.
4. Replace the breather/fill cap.
Hydraulic Oil Filter - Change
A 10 micron filter (7) is used on this machine (See Service
Parts List). It is located on the external filter head to filter
the oil before entering the hydraulic operating components.
1. Place a pan below the filter to catch dripping oil.
2. Using a filter wrench, unscrew the filter from the filter
head.
3. Apply a light coat of hydraulic oil to the gasket of the
new filter.
4. Screw the new filter onto the filter head until hand tight.
5. Tighten further with the filter wrench.
6. Dispose of the used filter and lost oil, in accordance
with local safety and environmental protection laws.
If the filter head ever needs to be replaced, be sure that the
direction of flow, indicated by the arrow on the filter head, is
pointing away from the oil reservoir.
RG74DXH Operator · Service · Maintenance Manual
Maintenance
Always keep the hydraulic oil clean.
Hydrostat Charge Pump Oil Filter Change
8
This filter (8) is located on frame by the engine fuel filter side
of the machine. (See Service Parts List).
1. Place a pan below the filter to catch dripping oil.
2. Using a filter wrench, unscrew the filter from the filter
head.
3. Apply a light coat of hydraulic oil to the gasket of the
new filter (See Service Parts List). If the filter head ever
needs to be replaced, be sure that the direction of flow,
indicated by the arrow on the filter head, is sending fluid
to the cutter wheel pump.
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RG74DXH Operator · Service · Maintenance Manual
Cooling System - Check
NOTICE
The coolant level should be checked daily.
1
Check the cooling level in the radiator.
1. When it is below the sight glass (1) shown above
2. When the coolant level drops due to evaporation, add
50% water-antifreeze mix only up to the full line.
3. Periodically inspect the coolant system for obstructions
and debris. Clean out the cooling system and the engine
compartment as described in the Cummins Engine
Manual.
Radiator
Flush & Refill
3
• When the radiator is empty, re-tighten the radiator
drain plug (3).
• When refilling the radiator, see your Cummins Engine
Manual for coolant specifications.
• With the radiator cap removed, start the engine.
• Check the amount of fluid in the radiator (1), adding
coolant as necessary.
• When the coolant level in the radiator remains constant,
replace the cap on the radiator and re-secure the cover
to the top of the engine enclosure.
Air Cleaner
Clean & Change Cartridges
4
DO NOT REMOVE RADIATOR CAP AFTER ENG INE
HAS BEEN OPERATED OR ENGINE IS HOT.
2
• Remove the radiator cap (2)
• Place a container under the radiator drain and loosen
the drain plug (3).
48
5
6
RG74DXH Operator · Service · Maintenance Manual
• Clean or replace the filter cartridges if the indicator (4)
is illuminated. Clean the air filter cartridge (See Service
Parts List) every 100 hours and replace it every 400 hours.
• Unfasten the clips (5) holding the end cap of the air
cleaner and remove. After replacing the cartridges,
replace the end cap of the air cleaner and lock the clamps
adjust the dust ejector valve (6) positioned as shown.
• Discharge the dust ejector valve.
Detailed directions can be found in the Cummins Engine
Manual.
Perform this procedure more frequently under extremely
dusty or dirty conditions.
Battery - Check
Adjust Electrolyte Level
1. Remove each cap carefully by prying with a screwdriver.
2. Electrolyte level should be 1/4” to 1/2” above metal
plates (just touching bottom of plastic fill neck). Add
distilled water as needed.
3. Replace both caps.
Clean Terminals
1. Remove the black negative (-) cable.
2. Clean the terminal and clamp of any oxidation buildup
with a stiff wire brush. (Stroke the brush away from your
body to avoid hazardous particles.)
3. Apply a light coat of petroleum jelly around the base of
the terminal.
4. Replace the cable.
5. Repeat the same procedure for the red positive (+)
cable.
Cutting Wheel & Teeth
Among the most critical elements of the stump cutter are the
cutting teeth. They are also the most subject to damage and
wear, as in the course of cutting stumps they may encounter
a numerous assortment of abra sives and objects in the
stump’s environment, such as dirt, stones, and occasionally a
large rock or buried scrap. The loss of and wear of teeth can
sig nifi cant ly impair the efficiency of a stump cutter and also
result in overexposure of other teeth, resulting in premature
failure or wear. There fore it is important to make frequent
observation of the con di tion of all of the cutting teeth, and
replace any missing and sig nifi cant ly worn teeth, as soon
as feasible. Read all of the instructions which follow before
changing cutting teeth.
Rayco Teeth
Rayco Manufacturing Inc. recommends only genuine Rayco
Cutting Tools for use on Rayco Stump Cutters and Forestry
Mowers. The use of non-Rayco cutting tools or cutting
wheels will void the machine warranty. Rayco’s cutting tools,
cutting wheels, and mower rotors are specifically designed
to provide optimum performance in many ways. The use of
non-Rayco parts will compromise this optimum performance.
• Safety: Rayco’s cutting tools are always attached with at
least two fasteners. This redundant fastening system is
far safer than those systems employing only one fastener.
Rayco’s cutting tools are also more visible than some of
the other cutting tools that are available. Some of the
cutting wheels available today are “transparent” which
can lead to an operator or bystander becoming confused
as to the actual limits of the cutter tool.
• Proper Balance: Rayco’s cutting wheels and mower
rotors are designed to achieve a dynamic balance that
avoids vibration. Using other cutting tools can set
up vibrations that will harm the machine’s structure &
reduce bearing life.
• Number of Teeth for Depth of Cut: Rayco’s cutter wheels
are designed to provide an economical cutting wheel
assembly solution. The teeth are spaced to provide a
maximum depth of cut for the number of teeth on the
wheel. Some of the wheels available today use a large
quantity of teeth to get the same depth of cut that a
Rayco wheel will achieve with half the teeth. While the
individual tooth cost may be less, the overall costs are
more. Additionally, having too many teeth in the stump
at any one time can lead to aggressive “grabbing” of the
stump, causing the stump cutter to violently hop. This
can cause injury to both man & machine.
• Tooth Projection: Rayco’s stump cutter teeth are
specifically designed to ensure that the carbide tip can
remove a clear “kerf” from the stump without the body
of the tooth ever contacting the stump. This concept
reduces drag, which maximizes the use of the machine’s
horsepower. This also reduces wear on the tooth body
and on the attachment hardware. Many of the other
cutting tool systems available today do not address this
important aspect of cutting.
• Cutting Tool Dimensions: Rayco’s stump cutting teeth
are carefully designed to have the proper size of carbide
tip. Carbide tips ultimately become dull, and using
large, oversized carbide tips will induce extreme impact
energies into the machine’s structure.
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RG74DXH Operator · Service · Maintenance Manual
• Debris Retention: Rayco’s cutting tool patterns are
designed to minimize the retention of debris in between
the cutting tools. This debris can cause imbalance. This
debris can also become a dangerous projectile. NonRayco cutting tools may retain more debris.
Changing Teeth
BLOCK OR OTHERWISE SECURELY SUPPORT THE
CUTTING BOOM WH EN CHANGI NG TEETH.
NOTICE
Read all of the following instructions before
beginning to change the cutting teeth.
NOTICE
The following illustrations represents the exact
location required for positioning each tooth. Please
follow the diagrams very closely for good cutting
wheel performance.
1
1. Remove the socket head bolts (3) from the teeth (2).
(Use the 1/2” hex key provided with the machine.)
2. Clean all dirt from the cutting wheel (1) and teeth (2).
3. Check the cutting wheel for cracks. Replace the wheel
if it is cracked.
4. After reinstalling or replacing the teeth, according to the
diagrams which follow, tighten the socket head bolts to
135 - 145 lbs/ft.
Replacement teeth are available from your Rayco dealer or
direct from Rayco. Refer to the Parts manual for part numbers
The Cutter Wheel on the RG74DXH uses 4 different types
of SuperTeeth as shown below:
2
3
4
Angle-Out Tooth -
Part# 2933C (countersunk)
Qty of 16
5
Straight Tooth -
Part# 3144C (countersunk)
Qty of 2.
6
Angle-Out Tooth -
Part# 2933T (threaded)
Qty of 16
7
Straight Tooth -
Part# 3144T (threaded)
Qty of 2
8
Angle-In Tooth -
Part# 20432C (countersunk)
Qty of 2
9
Angle-In Tooth -
Part# 20432T (threaded)
Qty of 2
6
6
6
7
6
6
6
6
6
9
6
6
4
4
4
4
8
5
4
4
4
4
4
9
6
6
6
6
6
7
6
4
4
4
4
5
8
4
4
4
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RG74DXH Operator · Service · Maintenance Manual
Sharpening Teeth
NOTICE
Sharpening cemented carbide cutting teeth requires
a special process. Have your teeth sharpened only
by a qualified machinist for obtaining a proper edge
and to avoid injury.
DO NOT allow any tooth to wear too much before sharpening.
Discard any tooth that has lost more than 1/8” of original bite.
Remove the tooth from the cutting wheel to be sharpened.
Tooth Sharpening Guidelines:
1. Obtain an unused tooth for comparison.
2. Discard any tooth that has lost more than 1/8” of original
bite, whether lost through usage or grinding.
3. Grind off a minimal amount from the end, just enough
to restore the original taper and radius on the end. The
end of the cemented carbide tip and the end of the steel
shank should be flush after grinding.
Cutter Wheel Bearings
Lubricate
DO NOT ATTEMPT TO GREASE CUTTER WHEEL
BEARINGS WHILE CUTTER WHEEL IS SPINNING.
BE SURE CUTTER WHEEL HAS COME TO A
COMPLETE STOP, MACHINE IS OFF BE FORE
GREASING CUTTER WHEEL BEARING.
SERIOUS INURY OR DEATH COULD RESULT.
1
1
see the old grease purge itself out all the way around the seal
diameter and new grease beginning to purge out.
This will ensure that the dirt and debris that gets collected
inside the seal area is flushed away from the internal bearings
thus providing longevity to the bearing and races.
Engine Leaks - Check
Check for leaks as described in the “After First 50 Hours”
interval of the Cummins Engine Operation Manual.Engine
Mounts - Check
Check and tighten if necessary all engine mounts.
INSERT GREASE SLOWLY AND CAREFULLY TO
PREVENT DAMAGE TO THE BEARING SEALS. USE
EXTRA CAUTION WHEN USING A HIGH PRESSURE
OR HIGH VOLUME GREASE GUN.
Lubricate the cutter wheel bearings zerk(1) fitting DAILY. Fill
with high-temperature (NLGI 2) grease until you can visually
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RG74DXH Operator · Service · Maintenance Manual
Cutting Wheel Belt - Check &
Adjust Tension
A MOVING BELT IS VERY POWERFUL AND
DANGEROUS. KEEP AWAY FROM A MOVING BELT
AT ALL TIME S! EXTREM E CAUTION MUST BE USED
TO PREVENT DEATH OR SERIOUS I NJURY. FOR
THE SAKE OF SAFETY, THE BELT GUARD COVER
MUST ALWAYS BE IN PLACE WHEN THE ENGINE
IS RUNNING. BEFORE BEGINNING TO CHECK OR
ADJUST THE BELT: SHUTDOWN THE MACHINE,
INS URE THAT ALL MOVING PARTS HAVE COME TO
A HALT, REMOVE THE KEY FROM THE IGNITION,
AND PLACE THE KEY I N SAFEKEEPING.
1
in and drop down into the 12-15 lbs. range at 1/2”
deflection.
Smart Tension App
Attention iPhone users. Mitsuboshi as
designed an app for Apple iPhone users
to use for checking tension for timing belts,
V-Ribbed Belts, Flat Belts, etc.
Open your Smart Tension App
• Select the “Other” option
• Select the “Timing Belt” option
• Tap on Belt Type, then choose the “GigaTorque GX” belt.
• Tap on Belt Profile, then choose “G14M”.
• Tap on Belt Width, then choose “68”.
• Tap in the Span Length box. The span length on your
RG74DXH will be 33.25in (844mm).
• The start screen will appear, to start the measurement:
Tap “Start” and hold the iPhone at the measuring position,
before the belt is made to vibrate. “Start” button changes
to measuring..... and the microphone starts to pick up
a sound wave.
Note: Hold the microphone of the (bottom of the phone)
iPhone roughly 1/4 - 3/8” (10mm) from the center of the
span length.
• Simply flick the belt with your finger or softly tap it with
a wrench to make your belt vibrate.
When the microphone picks up a sound wave, the sound
pressure level meter flashes and the detected frequency
and the calculated belt tension will display. When the
measurement is completed, “Done” will appear.
There are more instructions available on the app itself.
Ref: Belt Tension Frequency is 36-38Hz
Using a belt gauge, check the Belt tension by depressing
the Belt at the center of the span.
1. Remove the Belt guard cover (1). The cutting wheel
must be free to rotate (eg. not resting on ground).
• The belt should deflect 3/8”-1/2” when 20 lbs. force
is applied.
• Use 20 lbs. at 3/8” deflection when installing a new
belt. After approximately 5-10 hours it will begin to seat
52
RG74DXH Operator · Service · Maintenance Manual
Cutting Wheel PolyBelt - Check
Tension
The cutting wheel is driven by a low maintenance positive drive
belt. To prolong belt life, proper tension must be maintained.
A loose belt will cause excessive cutting wheel slippage
and belt failure. A belt that is too tight can cause hydraulic
motor bearing failure.
When the belt is too loose
1. Loosen the hydraulic motor bracket slide bolt (2) and
both motor pivot shaft clamp bolts (7) enough to allow
the hydraulic motor (6) to pivot freely.
2. Loosen the lock nut (3) on the adjusting screw (4).
3. Pivoting the hydraulic motor (6) away from the cutting
wheel will tighten the belt. Turn the adjusting nut (5)
clockwise (viewed from ground), pivoting the hydraulic
motor away from the cutting wheel.
NOTICE
When checking belt tension, the cutting wheel must
be free to turn. Therefore, check the tension when
the cutting boom is locked in the raised position,
rather than when the cutting wheel is resting on
the ground.
4. Check the tension once again, and continue tightening
the belt and re-checking as necessary, until properly
tensioned.
5. Retighten the lock nut (3), the hydraulic motor bracket
slide bolt (2) and both motor pivot shaft clamp bolts (7).
6. Remount belt guard cover and bolts. Tighten all bolts.
4
3
6
2
7
When the belt is too tight
1. Loosen the hydraulic motor bracket slide bolt 2) and
both motor pivot shaft clamp bolts (7) enough to allow
the hydraulic motor (6) to pivot freely.
2. Loosen the lock nut (3) on the adjusting screw (4).
3. Pivoting the hydraulic motor (6) towards the cutting
wheel will allow the belt to loosen. Turn the adjusting
nut (5) counterclockwise (viewed from ground), allowing
the hydraulic motor to pivot towards the cutting wheel.
4. Check the tension once again, and continue loosening
the belt and re-checking as necessary, until properly
tensioned.
5. Retighten the lock nut (3), the hydraulic motor bracket
slide bolt (2) and both motor pivot shaft clamp bolts (7).
6. Remount belt guard cover and bolts. Tighten all bolts.
5
800.392.2686
53
RG74DXH Operator · Service · Maintenance Manual
Emergency Stop Function - Check
Verify the brake emergency stop is working by raising one
wheel off the ground, rotating the wheel and activate the
emergency cable to insure that the brake will automatically
apply and stop the wheel.
Engine Mountings- Check
Ensure that the torque values remain as shown in the “Bolt
Torque Specification Data” at the front of this section.
Engine Belt Drives - Check
Follow the directions found in the Engine Operation Manual.
Engine Valve Clearance - Check
Check and adjust the intake and exhaust valve clearance as
needed. Spec: 0.23mm - 0.27mm (0.009” - 0.011”)
Grease & Oil Buildup - Remove
Wipe all fittings, caps, and plugs before servicing.
Keep a close watch for leaks. Refer to the “Fluid Penetration”
ACCUMULATED GREASE AND OIL ON A MACHINE
IS A FIRE HAZZARD. REMOVE SUCH DEBRIS WITH
STEAM CLEANING OR HIG H PRESSURE WATER.
NOTICE
For cleaning with a hot water device, use a spray
steam with a pressure not exceeding 426 psi
(2982kPa) to prevent damage to painted areas of
the components. The use of solvents or strong
cleaners should be avoided for the first 90 days.
Strong cleaners will destroy paint until the paint
is fully cured.
in the safety section of this manual before checking for leaks.
If leaking is observed, find the source, and correct the leak.
Check the fluid levels more frequently than the recom mend ed
periods if leaking is suspected or ob served, until the problem
may be corrected.
Swing Pivot Bearings
Lubricate the two fittings (9) on the cutting boom swing
pivot housing facing towards the operator side. Apply 2-3
pumps of grease.
Lift Pivot
Lubricate the lift pivot fittings (10), there is one on each side
10
of pivot. Apply 2-3 pumps of grease.
Lift Cylinder Pivots
Lubricate the cylinder fittings (11) on each end of the lift
11
12
cylinder pivot as shown. Apply 2-3 pumps of grease.
Telescoping Tongue (Inside Tube)
Fully extend the telescoping tongue, evenly apply grease
liberaly to all four sides of the tube.
54
9
RG74DXH Operator · Service · Maintenance Manual
800.392.2686
55
RG74DXH Operator · Service · Maintenance Manual
Z - DEUTSCH DTM04-4P, W/WM-4P WEDGELOCK
ECU FUSE 30A
TYPE 'U'
3332
PLUG '10'WATER IN
TYPE 'F'
KEY FUSE 20A
TYPE 'U'
35
34
14"
23"
4"
36
COM GRD
BATTERY
TYPE 'M'
COM GRD
BATTERY
TYPE 'M'
37
8"
2"2"
START SOL FUSE
30A TYPE 'U'
RUN PWR FUSE
30A TYPE 'U'
4"4"4"
Main Electrical Wiring Harness 37581 Rev B.
PLUG '24'
CW PUMP
TYPE 'F'
PLUG '23'
HYD TEMP
TYPE 'F'
5"
14"
29"
14"
TYPE 'S'
TYPE 'S'
START SOL SIG
START SOL GRD
2625
11" 11" 11"
TYPE 'Q' & 'R'
STARTER PWR
TYPE 'Q' & 'R'
START SOL PWR
2827
11"11"11"
8"
26"
TYPE 'S'
PREHEAT SOL SIG
6"
TYPE 'S'
PREHEAT SOL GRD
3029
PLUG '31'
RUN PWR
RELAY
TYPE 'T'
LOOM
NO
56
STARTER SOL
TYPE 'P'
Terminal Legend
A - DEUTSCH HDP26-24-31SE (24-31 PLUG W/SOCKETS)
B- RESISTOR- 1K OHM, 2W (NEWARK 78R4771 OR EQ.)
C - BUSSMANN HHG OR EQ.
D - DEUTSCH HD10-9-1939P W/NICKEL PLATED TERMINALS IN'A' & 'B' AND GOLD PLATED TERMINALSIN 'C' & 'D'
E - TYCO/AMP 927770-3, 828904-1; CARLING WCH CONNECTOR 190-31214-001
F - DEUTSCH DT06-2S, W/W2S WEDGELOCK
G - DEUTSCH DT06-3S, W/W3S-1939-P012 WEDGELOCK, & GOLD PLATED TERMINALS
H - DEUTSCH DT04-3P-P007
J- DEUTSCH DT06-3S-P006
K - DELPHI 13964572 96 WAY, W/COVER LEVER 15494614 OR COVER LEVER W/ORANGE TAB 13964580,
RUBBER BOOT 13957208 & STRAIN RELIEF 13856709
L - RING TERMINAL FOR 1/2" STUD - INSULATED - W/ADH. HEAT SHRINK
M - RING TERMINAL FOR #3/8 STUD - INSULATED - W/ADH. HEAT SHRINK
N - DELPHI 150 SERIES 3 PIN (12110293), DELPHI TERMINAL (12048074), DELPHI LOCK (12052845)
P - RING TERMINAL FOR #1/4 STUD - INSULATED - W/ADH. HEAT SHRINK
Q - RING TERMINAL FOR 5/16" STUD - INSULATED - W/ADH. HEAT SHRINK
R - VTE SERIES 212 (212N1V02) OR EQ. (RED)
S - RING TERMINAL FOR #10 STUD - INSULATED - W/ADH. HEAT SHRINK
T - HELLA RELAY CONNECTOR KIT H84-709-011 OR EQ.
U - RING TERMINAL FOR #8-32 STUD - INSULATED - W/ADH. HEAT SHRINK
V - DEUTSCH DT06-3S, W/W3S WEDGELOCK
W - DEUTSCH DT04-3P, WITH (3) 114017 PLUG
X - 1/4" FEMALE BLADE FULLEY INSULATED W/ADH HEAT SHRINK
Y - DEUTSCH DT06-6S, W/W6S WEDGELOCK
18"
17
50"
PLUG '15'
COOLANT LEVEL
TYPE 'N'
ENGINE
12"
GRD
11
TYPE 'L'
ENGINE
12"
12
GRD
TYPE 'L'
TYPE 'U'
ECU FUSE 30A
14"
30A TYPE 'U'
30A TYPE 'U'
RUN PWR FUSE
START SOL FUSE
34
3332
4"4"4"
TYPE 'U'
KEY FUSE 20A
35
4"
23"
COM GRD
36
8"
TYPE 'M'
BATTERY
TYPE 'M'
COM GRD
BATTERY
37
2"2"
WATER IN
PLUG '10'
FUEL
TYPE 'F'
46"
PLUG '38'
CHARGE
FILTER
TYPE 'F'
RG74DXH Operator · Service · Maintenance Manual
Main Electrical Wiring Harness 37581 Rev B.
1"
8"
1"
6"
6"
6"
4"
3"
3"
4"
6"
6"
6"
24"
22"
PLUG '39'
HYD OIL LVL
TYPE 'V'
20"
8"16"10"12"
SOA
LCOKOUT
TYPE 'S'
5"
30"
6"
6"
46 47
1" 1"
SOA
LOCKOUT
TYPE 'S'
30"
TYPE 'G', 'H', 'J'
70"
PLUG '08'
ECM CAN
PLUG '40'
ECM CAN
TYPE 'G' AND 'H'
PLUG '07'
RECEIVER CAN
TYPE 'G', 'H', 'J'
CUTTER
WHEEL
41
ON/OFF
TYPE 'X'
CUTTER
WHEEL
42
ON/OFF
TYPE 'X'
INTERCONNECT
TYPE 'V' & 'W'
02
DISPLAY FUSE 20A
PLUG '43'
IGNITION
TYPE 'Y'
PLUG '44'
E-STOP
TYPE 'Z'
PLUG '45'
DISPLAY
PLUG '01'
DISPLAY
TYPE 'A'
PLUG '03'
TYPE 'C'
PLUG '04'
DIAGNOSTIC
TYPE 'D'
PLUG '05'
THROTTLE
SWITCH
TYPE 'E'
PLUG '06'
COMMAND CUT
SWING CONTROL
VALVE
TYPE 'F'
#02
RESISTOR
TYPE "B"
800.392.2686
PLUG '09'
ECM
TYPE 'K'
WIRE LENGTH
LESS THAN 6"
6" TO 40"
40" TO 100"
100" TO 200"
GREATER THAN 200"
TOLERANCE
+1/4" -0"
+1/2" -0"
+3/4" -0"
+1" -0"
+1-1/2" -0"
NOTE: CONNECTOR '01' PIN # 01-3, 01-4 FOR
CAN-BUS TO BE GOLD PLATING OVER NICKEL.
ALL OTHERS TO BE NICKEL PLATED.
Rayco Manufacturing, Inc. warrants to the first user that the
products it supplies will be free from defects in material and
workmanship under normal and proper usage for a period of
365 days from the date of delivery to the first user. In addition,
with respect to “Mini Work-Force” models, the mainframe
and control bar will be free from defects in material and
workmanship under normal and proper usage for a period
of two (2) years from said date of delivery.
This warranty does not cover and Rayco makes no warranties
with respect to (i) any product that has been subject to abuse,
misuse, misapplication, neglect, alteration or accident; to
improper or incorrect repair or maintenance; or to abnormal
conditions of use, temperature, moisture, dirt or corrosive
matter; and (ii) any material, parts or other components that
are manufactured by someone other than Rayco, which items
carry only the manufacturer’s warranty, if any. Furthermore,
this warranty does not cover expendable parts.
Individual components such as engines, engine drive systems,
batteries, and hydraulic components, etc. shall be covered
by standard warranties of their respective manufacturers.
Any claims must be submitted within 30 days of the repair.
B. Individual Components
1.Engines
a. All engines have specific warranties issued by OEM
and honored thru their respective dealer.
2. Hydraulic Components
a.Hydraulic components have variable warranties. Rayco
must preauthorize all hydraulic component product
warranties prior to removal from the machine, and all
warranty considerations are the sole responsibility of
the manufacturer.
3. Batteries
a. Batteries have a warranty that is honored thru
manufacturer. For warranty service, the purchaser is to
contact manufacturer directly.
4. Various Components
a. Belts will be covered under warranty only if Rayco
receives warranty from their supplier.
b. Sprockets have a six month limited warranty.
c. Electric clutches have a six month limited warranty.
d. Hydraulic Cylinders will be covered under warranty
only if Rayco receives warranty from their supplier.
5. Pockets and Teeth
a. Pockets and Teeth will be covered under warranty
only if they are defective before they are mounted on a
stump grinder. Once they are used, all warranty stops.
C. Items not Covered
Rayco is not responsible for the following:
1. Premiums charged for overtime labor requested by the
purchaser.
2. Transporting the product to and from the place at which
warranty work is performed.
3. Any product that has been altered or
modified in ways not approved by Rayco.
4. Depreciation or damage caused by normal wear, lack
of reasonable and proper maintenance, failure to follow
operating instructions, misuse, lack of proper protection
during storage, or accident.
D. Unapproved Service Modification
Rayco is relieved of its obligation under this warranty if:
1. Service (other than normal maintenance and replacement
of service items) is performed by someone other than
an authorized Rayco dealer; or
2. The product is modified or altered in ways not approved
by Rayco.
E. Obtaining Warranty Service
To obtain performance of this warranty, the original retail
purchaser must request warranty service from a Rayco dealer
authorized to sell the product to be serviced. When making
such a request, the purchaser must present evidence of the
product’s delivery date, make the product available at the
dealer’s place of business, and inform the dealer in what
way the purchaser believes the product to be defective.
Warranty repairs can be made in the field if the purchaser and
servicing dealer so desire. However, travel time expense to
and from the job site will be purchaser or dealer responsibility.
F. No Implied Warranty or Other Representation
Where permitted by law, neither Rayco nor any company
affiliated with it makes any warranties, representations
or promises, expressed or implied, as to the quality or
performance, or freedom from defect of its products other
than those set forth above, and NO IMPLIED WARRANTY
OF MERCHANTABILITY OR FITNESS IS MADE.
G. Limitation of Purchaser’s Remedies
Where permitted by law, the purchaser’s only remedies in
connection with the branch of performance on any warranty
on any Rayco product are those set forth on this page. In
no event will the dealer and or Rayco be liable for incidental
or consequential damages, including but not limited to:
loss of profits, rental of substitute equipment, or other
commercial loss.
H. No Dealer Warranty
The selling dealer makes no warranty of his own on any
item warranted by Rayco, and makes no warranty on other
items unless he delivers to the purchaser a separate written
warranty certificate specially warranting the item. A dealer
has no authority to make any representation to promise on
behalf of Rayco, or to modify the terms or limitations of this
warranty in any way.
If you have a situation where you are not sure if a component
is covered under warranty, please do not hesitate to contact
us. Rayco wants you and your customer to be 100% satisfied
with our products and service.
67
Read and understand all instructions before attempting to operate this machine. This manual
should be readily available for reference at all times.
Additional copies of this manual may be purchased. Contact your Authorized Rayco Dealer or
Rayco Manufacturing Inc.
RAYCO Manufacturing, Inc.
4255 E Lincoln Way
Wooster, OHIO 44606 U.S.A.
800.392.2686
raycomfg.com
Think Smart, Think Safe………
We care about your safety. When operating your RAYCO® machinery always wear an approved helmet complete with ear muffs, face shield and the proper eye wear. Never operate
under the influence of alcohol or drugs. Know your RAYCO, read and understand your owner’s
manual cover to cover.
RAYCO Manufacturing Inc. retains the right to make changes in design and specifications;
engineering; add or remove features; add improvements; or discontinue manufacturing at any
time without notice or obligation.
Thank you for buying and using RAYCO Equipment.
“The Stump Cutter People”
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