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RG74DXH
OPERATOR · SERVICE · MAINTENANCE MANUAL
RAYCO MANUFACTURING © 2017 - ALL RIGHTS RESERVED
PRINTED IN USA
INDEX: OSMRG74DXH-17
RG74DXH Operator · Service · Maintenance Manual
Introduction
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.
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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.
TABLE OF CONTENTS
Foreword
Safety
Operation
Warranty
RG74DXH Operator · Service · Maintenance Manual
Table of Contents
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37
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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.
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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.
• Cummins QSF3.8 diesel engine meets Tier 4 Final/
Stage IV emissions
• Does not require Diesel Exhaust Fluid (DEF)
• Does not utilize Diesel Particulate Filter (DPF)
• Large displacement engine produces 74hp / 295ftlbs torque
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General
Weight: 5920 Lbs Maximum
Length: 190” Maximum
Height: 97” Maximum
Width: 83” Maximum
Chip Collection Capacity: 86cu. ft. (2435 liters) Minimum
Chassis Design: Electrically welded 4”x6”x3/8” (102x152x9.5 mm) wall rectangular steel tubing
Axle Capacity: 7000 lbs (3175 kg)
Telescoping Tongue (coupling) Extension: 60” 152.5 cm)
Minimum
Hitch: Adjustable height 2-5/16” (58.7 mm) Ball
Jack Stand: Hydraulic
Tires: (2) 235-75R-17.5H 6000LB
Engine
Model: Cummins 3.8L, Tier 4/Stage IV, Vertical 4-cycle, Turbocharged, Intercooler, Liquid Cooled, diesel
Number of cylinders: 4
Displacement: 229 cu. in
Maximum no load RPM: 2500
Gross HP at maximum no load RPM: 74 HP
Maximum rated torque: 295ft lbs @1300 RPM
Cooling medium: liquid cooled
Air Cleaner: Dry type with Pre-Cleaner
Oil Filter: Spin-on type
Fuel Tank Capacity: 24 gallons
Electrical System: 12 volts/135 AMP Alternator
Safety: Elastometric engine mounts required
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
RG74DXH Operator · Service · Maintenance Manual
Specs
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
Oil Type: Tellus T46
Hydraulic Tank Capacity: 24 Gallons
Cutting Wheel
Wheel Diameter: 28” Maximum
Wheel Thickness: 1” Minimum
Cutting Wheel Bearings: 2-3/16” diameter double row spherical roller
Cutter Wheel RPM: 1000 RPM @ 2200 RPM Engine Speed
Drive Belt: MBL GigaTorque®
Cutting Teeth: RAYCO Super tooth™ forged, one piece, with tungsten carbide tips.
Cutter Teeth Quantity: 40 Maximum
Belt Guard: Steel, one piece
Chip Retaining Curtains: Fabric impregnated rubber
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 Number
Machine
Engine
Implement
Implement
Dealer Information
Name
Address
Sales
Parts
Service
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Dealer Contact
Serial Number
Phone Number Hours
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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.
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, will result in death or serious injury.
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
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General Hazard Information
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
• 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.
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.
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.
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 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
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
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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
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
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
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.
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RG74DXH Operator · Service · Maintenance Manual
Safety
Lines, Tubes and Hoses
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
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.
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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 PROCEDURES IN THE SAFETY AND OPERATION
SECTIONS OF THIS MANUAL MUST BE READ AND
UNDERSTOOD BEFORE STARTING THIS 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 DEBRIS!
NEVER stand 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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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.
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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.
• 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
PREVENT WHIPPING 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 WHIPPING, 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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RG74DXH Operator · Service · Maintenance Manual
COMBINATION DISTURBANCE OCCURS, DO NOT steer or brake. Steering or braking during a disturbance can cause a loss of control or crash.
If a WHEEL GOES OFF THE 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.
BEFORE 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 substance that might impair your vision, judgment, or ability to control the vehicle.
NEVER tow without properly installed 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
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.
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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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 COULD RESULT
IN SERIOUS INJURY OR DEATH. ALWAYS
ENSURE THE PHOTO-EYE IS WORKING BEFORE
OPERATING THE MACHINE. IF THE PHOTO-EYE
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 WHIPPING 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.
RG74DXH Operator · Service · Maintenance Manual
Safety
DO NOT RELEASE OR JERK THE FORWARD/
REVERSE LEVER UNTIL THE MACHINE IS
COMPLETELY UNLOADED, OR THE STUMP CUTTER
MAY TIP OVER IN RESULT.
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RG74DXH Operator · Service · Maintenance Manual
Operation
5
2
4
3
7
1
8
24
6
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
RG74DXH Operator · Service · Maintenance Manual
Operation
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.
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.
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 MANUAL.
IN IT’S ENTIRETY, BEFORE OPERATING STUMP
CUTTER MACHINE.
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 FAILURE.
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
8
7
4 5 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
11
12
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
5. To insure safe brake performance and synchronization, read the brake controller manufacturer’s instructions completely before attempting any synchronization procedure.
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.
BEFORE ROAD TESTING, MAKE SURE THE AREA
IS CLEAR OF VEHICULAR AND PEDESTRIAN
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.
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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 TERMINAL.
UNCONTROLLED STARTING OF THE ENGINE
WOULD OCCUR, WHICH 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 starting 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.
3
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 AREA 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.
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.
30
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:
• 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.
Repeat STEP 4 consecutively
5: Cut Remaining 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:
• 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:
• 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.
• 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 LOW-FRICTION 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 ON/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 506 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
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RG74DXH Operator · Service · Maintenance Manual
Operation
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RG74DXH Operator · Service · Maintenance Manual
Lubrication & Fluid Specifications
R
AYCO
L
UBRICATION
& F
LUID
S
PECIFICATIONS
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 ULTRA LOW SULFUR DIESEL FUEL ONLY .
DO NOT USE FUELS WITH SULFUR CONTENT HIGHER THAN ULSD (Ultra Low Sulfer Diesel) 0.015% ( 15ppm
Hydraulic Oil (Petroleum-Mineral Base)
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. DON’T MIX different types of hydraulic fluids!
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 ……….…..Viscosity 7.7 cSt @ 100°C / 46 cSt @ 40°C / Pour Point -45°C (-49°F)
Shell Tellus T 46 (new name: Tellus S2 V46 )…....Viscosity 7.95 cSt @ 100°C / 45.9 cSt @ 40°C / Pour Point -42°C (-43°F)
Mobil DTE 15M …………………………………………Viscosity 7.8 cSt @ 100°C / 46 cSt @ 40°C / Pour Point -42°C (-43°F)
Exxon Univis N 46 …………………………………….Viscosity 8.2 cSt @ 100°C / 46 cSt @ 40°C / Pour Point -48°C (-54°F)
Pennzoil Pennzbell AWX MV 46 ………………….…Viscosity 8.8 cSt @ 100°C / 46.3 cSt @ 40°C / Pour Point -48°C ( -54°F)
If choosing an oil other than those recommended above, the following specifications should be used:
• Kinematic Viscosity: 7 cSt ( min ) @ 100°C / 42-50 cSt @ 40°C
• 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.
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 .………………….Viscosity 8.1 cSt @ 100°C / 47 cSt @ 40°C / Pour Point -57°C (-70°F)
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Track Drive Oil
The track drives should be filled with a Synthetic 75W-90 heavy duty gear oil. This oil should have an API service classification of GL-5 which has an extreme pressure additive. A synthetic 75W-140 or 80W-140 heavy duty GL-5 gear oil could also be used in warm climates to extend gear life.
RG74DXH Operator · Service · Maintenance Manual
MWF Hydrostat Drive
The Differential Gearbox is shipped with 80-90W performance gear oil. Use this fluid or comparable type when refilling.
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 and suitable to operate continuously at 212°F / 100°C or higher.
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 ………….…173 cSt @ 40°C / 15.6 cSt @ 100°C / Temperature range -34°C to 121°C (-30°F to 250°F)
Citgo Premium Lithium EP2 …..173 cSt @ 40°C / 14.9 cSt @ 100°C / Temperature range -15°C to 121°C ( 5°F to 250°F)
Shell Alvania EP2 …….………….189 cSt @ 40°C / 15.6 cSt @ 100°C / Temperature range -20°C to 100°C ( -4°F to 212°F)
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
Operator Manual for details.
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 in low temperatures. These oils have lubricant viscosity grade of SAE 0W or SAE 5W.
• When you start an engine or when you operate an engine in ambient temperatures that are below
-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.
Fluids Refill Capacities (Approximate)
Compartment or System U.S. Gallons Imperial Gallons
Fuel Tank
Engine Crankcase w/Filter
Total Engine Coolant including Cooler
Hydraulic Reservoir
Liters
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RG74DXH Operator · Service · Maintenance Manual
Specifications
COOLANT SPECIFICATIONS
Coolant / Antifreeze Recommendations for GM Powered Machines
ACDelco DEX-COOL® ANTIFREEZE/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)
Boiling Protection to -129.4°C (265°F)
Freeze Protection to -24.4°C (-12°F)
Freeze Protection to -36.7°C (-34°F)
Freeze Protection to -52.2°C (-62°F)
Concentration
50% antifreeze and 50% water
40% antifreeze and 60% water
50% antifreeze and 50% water
60% antifreeze and 40% water
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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 PERSONNEL SHOULD PERFORM MAINTENANCE OR REPAIR OF THIS EQUIPMENT.
CONSULT RAYCO MANUFACTURING TO PERFORM ANY MAINTENANCE THAT IS NOT COVERED IN THIS MANUAL.
IMPROPER MAINTENANCE OR REPAIR 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
PROBLEM CAUSE
No hydraulic fluid.
SOLUTION
No hydraulic power.
Damaged or worn hydraulic pump.
Fill with fluid.
See your Rayco dealer.
Relief valve damaged.
Low hydraulic fluid level.
Plugged hydraulic filter.
Add hydraulic fluid.
Replace filter.
Slow hydraulic power.
Oil foams.
Lack of engine power.
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.
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
PROBLEM
Engine Stalls When Grinding
Polybelt Is Noisy While Grinding
CAUSE
Swing rate is too fast
Too deep of a cut
Command-Cut not working
Belt is loose or worn
SOLUTION
Use Command-Cut Feature
Reduce cutting depth for material
(See your RAYCO Dealer)
Adjust or replace belts.
38
Power System Troubleshooting
PROBLEM
Engine hard to start or will not start.
CAUSE
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.
Lack of engine power.
Low battery output.
Low battery charge.
RG74DXH Operator · Service · Maintenance Manual
Troubleshoot
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.
SOLUTION
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 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 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.
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.
40
Daily or Every 10 Hrs Maintenance Interval
Walk Around Inspection See list
Engine Oil Level
Engine Coolant Level
Air Cleaner Filter & Indicator
Hydraulic Oil
Check & Replace if needed
Check
Check
Check
Fuel Tank
Fan Belt
Grease & Oil Buildup
Emergency Saftey Stop
Hitch
Wheel, Tire & Lug Nuts
Brake System
Fuel Pre-Filter
Engine Leaks
Radiator Screen
Cutter Wheel Bearings
Cutting Wheel
Check & Fill if needed
Check
Remove
Check
Check
Check
Check
Check
Check
Clean
Lubricate
Check Teeth
After First 50 Hrs Maintenance Interval
Engine Oil & Filter Change
Fuel Filter
Cutter Wheel Synchrounous Belt
Hydraulic Oil Filter
Cutter Wheel Charge Filter
Change
Check & Adjust
Change
Change
Pump/Gearbox Bolt Tightness
Fuel Pre-Filter/ Water Seperator
Engine Mountings
Engine Belt Drives
Brake System
Check
Check
Check
Check
Check
Every 50 Hrs Maintenance Interval
Lubrication Points Grease
Swing Pivot
Fuel System Water Seperator
Engine Belt Drives
Brake System
Cutting Wheel PolyBelt
Pump Mounting Bolts
Inspect
Drain
Check
Check & Adjust
Check & Adjust
Check
RG74DXH Operator · Service · Maintenance Manual
Maintenance
Every 250 Hrs Maintenance Interval
Engine Oil & Filter Change
Hydraulic Oil Filter
Cutter Wheel Charge Filter
Engine Cooling System
Battery
Change
Change
Inspect
Check & Clean Terminals
Every 500 Hrs or 1 Year Maintenance Interval
Fuel Filters
Engine Belt Drives
Brake Lining, Magnet, Drums
Brake Wiring
Hydraulic Oil Filter
Fuel Tank
Axle Wheel Bearings
Change
Replace
Inspect
Inspect
Change
Drain the Fuel
Clean & Repack
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RG74DXH Operator · Service · Maintenance Manual
Maintenance
Maintenance Log
Date of Service Machine Hours Description of Service/ Maintenance Notes
42
RG74DXH Operator · Service · Maintenance Manual
Maintenance
Maintenance Log
Date of Service Machine Hours Description of Service/ Maintenance Notes
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RG74DXH Operator · Service · Maintenance Manual
Maintenance
Maintenance Intervals Engine Oil Level
NOTICE
Check only when the machine is in a level position.
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.
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
1
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).
RG74DXH Operator · Service · Maintenance Manual
Maintenance
Fuel Tank - Check Level, Fill & Drain
4
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
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
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.
9
Change the fuel filter (9) as described in the “Service and
Maintenance” section of the Cummins Engine Maintenance
Manual.
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RG74DXH Operator · Service · Maintenance Manual
Maintenance
Fuel Tank - Drain
NOTICE
Dispose of any drained fuel according to local environment protection regulations.
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
1
1. Clean the fittings and tank.
2. Place the machine on level ground.
3. Expand the tracks out.
4. Place a container 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.
KEEP INSIDES OF ALL HYDRAULIC COMPONENTS
CLEAN AS THEY ARE INSTALLED.
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 WILL
LIKELY OCCUR.
6
4
5
2
3
7
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.
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.
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RG74DXH Operator · Service · Maintenance Manual
Always keep the hydraulic oil clean.
Hydrostat Charge Pump Oil Filter -
Change
Maintenance
Hydraulic Oil - Drain
1. Clean the fittings and tank.
2. Place the machine on level ground.
8
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.
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
3
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
• 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 ENGINE
HAS BEEN OPERATED OR ENGINE IS HOT.
2
5
• Remove the radiator cap (2)
• Place a container under the radiator drain and loosen the drain plug (3).
48
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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
800.392.2686
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. Non-
Rayco cutting tools may retain more debris.
Changing Teeth
4
5
6
BLOCK OR OTHERWISE SECURELY SUPPORT THE
CUTTING BOOM WHEN CHANGING 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.
7
8
9
1
2
3
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:
9
7
6
6
6
6
6
6
6
6
6 6
6
6
6
6
7
6
6
9
8
5
4
4
4
4
4
4
4
4 4
4
4
4
4
4
4
5
4
8
Angle-Out Tooth -
Part# 2933C (countersunk)
Qty of 16
Straight Tooth -
Part# 3144C (countersunk)
Qty of 2.
Angle-Out Tooth -
Part# 2933T (threaded)
Qty of 16
Straight Tooth -
Part# 3144T (threaded)
Qty of 2
Angle-In Tooth -
Part# 20432C (countersunk)
Qty of 2
Angle-In Tooth -
Part# 20432T (threaded)
Qty of 2
50
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.
RG74DXH Operator · Service · Maintenance Manual
1
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 BEFORE
GREASING CUTTER WHEEL BEARING.
SERIOUS INURY OR DEATH COULD RESULT.
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
A MOVING BELT IS VERY POWERFUL AND
DANGEROUS. KEEP AWAY FROM A MOVING BELT
AT ALL TIMES! EXTREME CAUTION MUST BE USED
TO PREVENT DEATH OR SERIOUS INJURY. 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: SHUT-DOWN THE MACHINE,
INSURE THAT ALL MOVING PARTS HAVE COME TO
A HALT, REMOVE THE KEY FROM THE IGNITION,
AND PLACE THE KEY IN 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
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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.
7
4
6
3
2
5
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.
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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” 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
ACCUMULATED GREASE AND OIL ON A MACHINE
IS A FIRE HAZZARD. REMOVE SUCH DEBRIS WITH
STEAM CLEANING OR HIGH 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.
11
12 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 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.
9
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RG74DXH Operator · Service · Maintenance Manual
Main Electrical Wiring Harness 37581 Rev B.
PLUG '24'
TYPE 'F'
PLUG '23'
HYD TEMP
TYPE 'F'
14"
5"
29"
14"
STARTER SOL
TYPE 'P'
17
STARTER PWR TYPE 'Q' & 'R'
25
11"
26
11"
27
11"
28
11"
29
11"
30
11"
6"
PLUG '31'
RUN PWR
RELAY
TYPE 'T'
NO
LOOM
18"
8"
26"
12"
11
12"
12
GRD
TYPE 'L'
ENGINE
GRD
TYPE 'L'
COM GRD BATTERY TYPE 'M' COM GRD BATTERY TYPE 'M'
32
4"
33
4"
34
4"
35
4"
36
2"
37
2"
8"
14"
23"
16"
PLUG '38'
CHARGE
FILTER
TYPE 'F'
PLUG '39'
HYD OIL LVL
TYPE 'V'
12"
46"
22"
8"
20"
10"
PLUG '10'
WATER IN
SOA
LCOKOUT
TYPE 'S'
46
1"
30"
6"
5"
6"
SOA
LOCKOUT
TYPE 'S'
47
30"
1"
70"
PLUG '08'
ECM CAN
TYPE 'G', 'H', 'J'
PLUG '40'
ECM CAN
TYPE 'G' AND 'H'
6"
6"
PLUG '07'
TYPE 'G', 'H', 'J'
8"
3"
6"
4"
3"
02
4"
1"
1"
41
42
CUTTER
WHEEL
ON/OFF
TYPE 'X'
CUTTER
WHEEL
6"
6"
6"
PLUG '43'
IGNITION
TYPE 'Y'
PLUG '44'
E-STOP
TYPE 'Z'
PLUG '45'
DISPLAY
INTERCONNECT
TYPE 'V' & 'W'
PLUG '01'
DISPLAY
TYPE 'A' #02
RESISTOR
TYPE "B"
PLUG '03'
DISPLAY FUSE 20A
TYPE 'C'
PLUG '04'
DIAGNOSTIC
TYPE 'D'
PLUG '05'
THROTTLE
24"
PLUG '06'
COMMAND CUT
SWING CONTROL
VALVE
TYPE 'F'
PLUG '09'
ECM
TYPE 'K'
50"
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'
F - DEUTSCH DT06-2S, W/W2S WEDGELOCK
G - DEUTSCH DT06-3S, W/W3S-1939-P012 WEDGELOCK, & GOLD PLATED TERMINALS
J- DEUTSCH DT06-3S-P006
K - DELPHI 13964572 96 WAY, W/COVER LEVER 15494614 OR COVER LEVER W/ORANGE TAB 13964580,
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
R - VTE SERIES 212 (212N1V02) OR EQ. (RED)
S - RING TERMINAL FOR #10 STUD - INSULATED - W/ADH. HEAT SHRINK
U - RING TERMINAL FOR #8-32 STUD - INSULATED - W/ADH. HEAT SHRINK
V - DEUTSCH DT06-3S, W/W3S WEDGELOCK
X - 1/4" FEMALE BLADE FULLEY INSULATED W/ADH HEAT SHRINK
Z - DEUTSCH DTM04-4P, W/WM-4P WEDGELOCK
PLUG '15'
TYPE 'N'
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.
56
RG74DXH Operator · Service · Maintenance Manual
Main Electrical Wiring Harness 37581 Rev B.
PLUG '24'
TYPE 'F'
PLUG '23'
HYD TEMP
TYPE 'F'
14"
5"
29"
STARTER SOL
TYPE 'P'
14"
17
STARTER PWR TYPE 'Q' & 'R'
25
11"
26
11"
27
11"
28
11"
29
11"
30
11"
6"
PLUG '31'
RUN PWR
RELAY
TYPE 'T'
NO
LOOM
18"
8"
26"
12"
11
12"
12
GRD
TYPE 'L'
ENGINE
GRD
TYPE 'L'
COM GRD BATTERY TYPE 'M' COM GRD BATTERY TYPE 'M'
32
4"
33
4"
34
4"
35
4"
36
2"
37
2"
8"
14"
23"
16"
PLUG '38'
CHARGE
FILTER
TYPE 'F'
PLUG '39'
HYD OIL LVL
TYPE 'V'
12"
46"
22"
8"
20"
10"
PLUG '10'
WATER IN
SOA
LCOKOUT
TYPE 'S'
46
1"
30"
6"
5"
6"
SOA
LOCKOUT
TYPE 'S'
47
30"
1"
70"
PLUG '08'
ECM CAN
TYPE 'G', 'H', 'J'
PLUG '40'
ECM CAN
TYPE 'G' AND 'H'
6"
6"
PLUG '07'
TYPE 'G', 'H', 'J'
8"
3"
4"
3"
02
4"
6"
1"
1"
41
42
CUTTER
WHEEL
ON/OFF
TYPE 'X'
CUTTER
WHEEL
6"
6"
6"
PLUG '43'
IGNITION
TYPE 'Y'
PLUG '44'
E-STOP
TYPE 'Z'
PLUG '45'
DISPLAY
INTERCONNECT
TYPE 'V' & 'W'
PLUG '01'
DISPLAY
TYPE 'A' #02
RESISTOR
TYPE "B"
PLUG '03'
DISPLAY FUSE 20A
TYPE 'C'
PLUG '04'
DIAGNOSTIC
TYPE 'D'
PLUG '05'
THROTTLE
24"
PLUG '06'
COMMAND CUT
SWING CONTROL
VALVE
TYPE 'F'
PLUG '09'
ECM
TYPE 'K'
50"
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'
F - DEUTSCH DT06-2S, W/W2S WEDGELOCK
G - DEUTSCH DT06-3S, W/W3S-1939-P012 WEDGELOCK, & GOLD PLATED TERMINALS
J- DEUTSCH DT06-3S-P006
K - DELPHI 13964572 96 WAY, W/COVER LEVER 15494614 OR COVER LEVER W/ORANGE TAB 13964580,
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
R - VTE SERIES 212 (212N1V02) OR EQ. (RED)
S - RING TERMINAL FOR #10 STUD - INSULATED - W/ADH. HEAT SHRINK
U - RING TERMINAL FOR #8-32 STUD - INSULATED - W/ADH. HEAT SHRINK
V - DEUTSCH DT06-3S, W/W3S WEDGELOCK
X - 1/4" FEMALE BLADE FULLEY INSULATED W/ADH HEAT SHRINK
Z - DEUTSCH DTM04-4P, W/WM-4P WEDGELOCK
PLUG '15'
TYPE 'N'
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.
800.392.2686
57
RG74DXH Operator · Service · Maintenance Manual
Main Electrical Wiring Harness 37581 Rev B.
58
COLOR LEGEND:
RED = RED
BLK = BLACK
BRN = BROWN
ORG = ORANGE
YLW = YELLOW
TAN = TAN
PUR = PURPLE
GRN = GREEN
BLU = BLUE
GRY = GRAY
/*** = TRACER COLOR
(***) IMPRINT LETTERING
RG74DXH Operator · Service · Maintenance Manual
Main Electrical Wiring Harness 37581 Rev B.
800.392.2686
COLOR LEGEND:
RED = RED
BLK = BLACK
BRN = BROWN
ORG = ORANGE
YLW = YELLOW
TAN = TAN
PUR = PURPLE
GRN = GREEN
BLU = BLUE
GRY = GRAY
/*** = TRACER COLOR
(***) IMPRINT LETTERING
59
RG74DXH Operator · Service · Maintenance Manual
Main Electrical Wiring Harness 37581 Rev B.
FROM
04
04
04
04
02
02
03
03
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
PLUG#
01
01
01
01
01
09
09
09
09
09
09
08
09
09
09
05
06
07
08
C
D
A
B
A
B
A
B
27
28
29
30
18
20
22
25
12
14
16
17
9
10
7
8
PIN#
2
5
6
3
4
13
25
26
27
28
32
5
8
B
1
C
A
2
2
WIRE DESCRIPTION
(FUNCTION IMPRINT)
COM GND
CAN (+)
CAN (-)
SERIAL GND
HYD OIL LEVEL SWITCH
STARTER LOCKOUT SIG
FUSED LCM PWR
(BLANK)
SERIAL (TX)
SERIAL (RX)
FUSED LCM PWR
HYD OIL TEMP SWITCH
THROTTLE UP SIG
THROTTLE DOWN SIG
ENGINE RUN SIG
IGNITION START SIGNAL
LCM STARTER SIGNAL
COMMAND CUT
CHARGE FILTER SENSOR
CW ENGAGE IN
CW ENGAGE OUT
RESISTOR
COM GND
RUN POWER (12V+)
LCM FUSED PWR
ECU GROUND
ECU POWER BAT (12V+)
CAN (+)
CAN (-)
RUN POWER (12V+)
CC GND
COM GND
CAN (+)
CAN (-)
ECU POWER BAT (+)
ENG RUN SIG
COOLANT SW PWR
WATER IN FUEL
ENG RUN SIG
ENG RUN SIG
ENG RUN SIG
ENG RUN SIG
VS OEM RETURN
GAUGE
18
18
18
18
18
18
18
18
18
18
18
18
18
18
18
18
18
18
18
18
18
18
18
18
16
18 *TWISTED
18 *TWISTED
18
18
18
18
18
18 *TWISTED
18 *TWISTED
18
18
18
18
18
18
18
18
18
COLOR
RED
RED
BLK
RED
YLW
GRN
RED
BLK
GRN
BLU
YLW
TAN
PUR
ORG
ORG
BLK
WHT
TAN
ORG
RED
TAN
GRN
BRN
WHT
BLK
YLW
GRN
GRY
WHT
ORG
RED
BLK
YLW
GRN
RED
BRN
PUR
BLU
RED
RED
RED
RED
BRN
SP5
SP4
40
40
SP7
SP1
SP2
SP3
06
38
42
24
05
44
43
25
45
SP3
23
05
SP7
SP3
01
45
PLUG#
SP1
07
07
45
39
10
SP4
SP4
SP4
SP4
15
09
SP4
44
15
SP2
SP1
SP1
09
TO
A
B
-
-
-
-
-
-
02
02
1
B
2
-
1
1
1
3
B
-
13
A
-
-
PIN #
-
C
B
A
B
-
-
1
-
-
C
46
-
2
A
-
22
-
-
60
1
6
-
A
C
-
A
-
-
86
87
30
85
-
-
2
1
-
-
75
76
83
-
51
52
62
73
35
49
50
43
43
46
36
38
39
39
31
31
32
35
26
27
31
31
12
17
23
24
09
09
09
11
09
09
09
09
09
09
09
RG74DXH Operator · Service · Maintenance Manual
Main Electrical Wiring Harness 37581 Rev B.
COOLANT LVL INPUT
ECU GROUND
ECU GROUND
ECU GROUND
ECU GROUND
ECM RETURN
ECU GROUND
INTAKE HEAT RELAY SIG
HS RETURN
STARTER LOCKOUT SIG
ECU GROUND
BAT/ENG BLOCK GND
START SOL SIG
RUN POWER (12V+)
COM GND
START SOL GND
START SOL PWR
RUN POWER BATT(12V+)
COM GND
RUN PWR RELAY SIG
RUN POWER (12V+)
ECU POWER BAT (12V+)
KEY SWITCH PWR (12V+)
COM GND
RUN POWER (12V+)
RUN POWER (12V+)
COM GND
KEY SWITCH PWR (12V+)
KEY SWITCH PWR (12V+)
KEY SWITCH START PWR
16
16
18
10
18
18
18
18
10
14
12
18
14
10
18
10
14
18
18
18
18
18
10
18
18
18
18
18
18
18
BLK
RED
RED
BLK
RED
RED
GRN
GND
RED
RED
BLK
GRN
RED
RED
RED
GRN
BRN
ORG
BLK
BLK
GRN
RED
BLK
PNK
BLK
BLK
BLK
BLK
BRN
BLK
-
-
-
-
-
-
-
2
-
-
-
B
-
-
SP1
SP2
SP2
SP1
SP6
SP6
SP8
43
SP2
SP4
SP6
SP1
34
33
SP1
37
28
SP2
SP1
29
30
SP7
SP5
15
SP5
SP5
SP5
SP5
10
SP5
-
-
-
-
-
-
-
-
-
4
-
-
-
-
-
SPLICE
SP5
SP6
SP7
SP8
SP1
SP2
SP3
SP4
WIRE DESCRIPTION
COM GND
RUN POWER (12V+)
LCM FUSED PWR
ECU POWER BAT (12V+)
ECU GROUND
KEY SWITCH PWR (12V+)
STARTER LOCKOUT SIG
KEY START PWR
SPLICE CIRCUITS
GAUGE COLOR CONNECTED TO
10, 14, 16,18
10,14,18
18
14,18
18
12, 16
18
18
BLK
RED
RED
RED
BLK
RED
ORG
GRN
01-2, 02-B, 06-2, 07-C, 24-1, 26, 31-85, 36, 39-C,
03-A, 05-2, 23, 31-87, 38-A, 39-A
1-8, 1-14, 03-B
04-B, 09-1, 09-25, 09-26, 09-27, 09-28, 32
04-A, 09-49, 09-50, 09-51, 09-52, 09-73, 11
35, 43-1, 43-6,
01-7, 02-A, 09-83
31-86, 43-4, 46
800.392.2686
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RG74DXH Operator · Service · Maintenance Manual
Hydraulic Kit Schematic 805387
ITEM QTY PART# DESCRIPTION
A 1 760759 VALVE-CHECK 15 PSI
D
E
B
C
F
1
1
1
1
1
805309 FIT-08 MORFS X -08 MOR R.125
801012 VALVE-CHECK 25 PSI
738046 FILTER-HEAD LARGE
805123 FILTER- HYD 1-1/4”
760129 VALVE-1 SPOOL JACKSTAND
G
H
J
1
1
1
805222 FILTER-HEAD DIFFERENTIAL 50PSI
805075 FILTER-HYD OIL RAYCO LOGO
62
R
S
P
Q
T
U
M
N
K
L
1
1
1
1
1
1
1
1
1
1
804909 CW MOTOR MANIFOLD
804908 CUTTER WHEEL PUMP
805215 PUMP- GEAR 8CC RG74DXH
738004 VALVE-3 SPOOL RG50/66/90
738008 VALVE-SWING CONTROL
800411 VALVE-FLOW CONTROL SJRD
805100 VALVE-CHECK DUAL PILOT PISTON
1200015 VALVE-OVERCENTER(SUN HYD)
804841 MOTOR-CW 200CC RG74T-R
805433 MANIFOLD-CW MOTOR RG74T-R
RG74DXH Operator · Service · Maintenance Manual
Hydraulic Kit Schematic 805387
800.392.2686
63
RG74DXH Operator · Service · Maintenance Manual
Adapter Kit 805387A Rev A.
ITEM
29
30
31
32
25
26
27
28
21
22
23
24
17
18
19
20
37
38
39
40
33
34
35
36
13
14
15
16
9
10
11
12
7
8
5
6
3
4
1
2
QTY
2
2
4
2
2
1
1
1
6
1
1
1
1
10
1
1
2
2
1
2
1
1
1
2
2
1
2
2
1
3
6
1
5
3
1
3
3
1
2
PART #
FF6400-06-06
FF6600-06-06-06
FF6801-06-06
FF2501-06-04
FF6602-06-06-06
FF6400-06-04
304-16-16
SFK-16
6059-08-06
FF3800-08-06
FF6400-12-12
4244-06-04
5504-06-06F
4404-06-06
FF2503-12-12
4503-12-12
4404-12-16
TBC-120
H6 HEX HD
6408-H-06
4601-12-08
6408-H-12
FF6802-08-08
4603-12-08
FF6801-06-04
FF6400-04-04
FF6801-04-06
FF6500-04-04
FF6804-06-06-06
FF6801-04-04
FF6801-08-08
FF6400-04-06
4601-12-08
FF6801-08-10
4501-12-12
4601-12-12
4603-12-16
FF6801-16-16
394-16-16
DESCRIPTION
06 MORFS X 06 MORB STRAIGHT
06 MORFS X 06 MORFS X 06 FORFS BRANCH TEE
06 MORFS X 06 MORB ELBOW
06 MORFS X 04 MP ELBOW
06 MORFS X 06 FORFS X 06 MORFS RUN TEE
06 MORFS X 04 MORB STRAIGHT
INTENTIONALLY BLANK
06 MORFS X 04 MORB ELBOW
04 MORFS X 04 MORB STRAIGHT
04 MORFS X 06 MORB ELBOW
04 MORFS X 04 FORFS SWIVEL 90°
06 MORFS X 06 MORB X 06 MORFS RUN TEE
04 MORFS X 04 MORB ELBOW
08 MORFS X 08 MORB ELBOW
04 MORFS X 06 MORB STRAIGHT
12 BT X 08 MORB ELBOW
08 MORFS X 10 MORB ELBOW
12 BT X 12 MP ELBOW
12 BT X 12 MORB ELBOW
12 BT X 16 MORB 45°
16 MORFS X 16 MORB ELBOW
16 MORFS X 16 CODE 61 90°
16 MORFS X 16 CODE 61 STRAIGHT
16 SPLIT FLANGE KIT
08 MORFS X 06 MORB BSPP ELBOW
08 MORFS X 06 MORB BSPP STRAIGHT
12 MORFS X 12 MORB STRAIGHT
3/8” BARB X 1/4” MNPT STRAIGHT
90° 06 FNPT X 06 FNPT FEMALE ELBOW
06 BT X 06 MNPT STRAIGHT
12 MORFS X 12 MP 45°
12 BT X 12 MP 45°
12 BT X 16 MP STRAIGHT
T-BOLT CLAMP 1.14”-1.22”
SCREW CLAMP 28/64-50/64 RANGE
HEX SOCKET O-RING PLUG
12 BT X 90 MORB ELBOW
HEX SOCKET O-RING PLUG
08 MORFS X 08 MORB 45°
12 BT X 08 MORB 45°
64
QTY
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
2
1
1
1
1
1
1
1
2
ITEM
29
30
31
32
25
26
27
28
33
34
21
22
23
24
17
18
19
20
13
14
15
16
9
10
11
12
7
8
5
6
3
4
1
2
PART #
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
RG74DXH Operator · Service · Maintenance Manual
Hose Kit 805387H Rev A.
DESCRIPTION
8R17-8FSX-8FFSX90LONG-110”
4R17-4FSX-4FSX90-53”
4R17-4FSX-4FSX90-104”
4R17-4FSX-4FSX90-152”
4R17-4FSX-4FSX90-146”
4R17-6FSX-4FSX90-142”
4R17-4FSX-6FSX-14”
4R17-4FSX-4FSX-18”
6R16-6FSX-6FSX-23”
6R16-6FSX-6FSX-35”
6R16-6FSX-6FSX-47”
8R16-8FSX-8FSX90-12”
12R4-PLAIN-18”
12R4-PLAIN-78” W/NHS
12R4-PLAIN-60” W/NHS
EATON 5/8” EH22510 BLUE HEATER HOSE OR EQUIVILENT-43”
EATON 3/8” EH22506 BLUE HEATER HOSE OR EQUIVILENT-25”
EATON 3/8” EH22506 BLUE HEATER HOSE OR EQUIVILENT-19”
12R4-PLAIN-20” W/NHS
12R4-PLAIN-48”
8R16-8FSX-8FSX-144” W/NHS
6R16-6FSX-6FSX90-12”
6R16-6FSX-6FSX90-11”
6R16-6FSX-6FSX45-15””
6R16-6FSX-6FSX45-13”
6R16-6FSX-6FSXMED90-79”
6R16-6FSX-6FSX45-79”
12R4-12FSX-12FSX90-116” W/NHS
8R16-8FSX-8FSXLONG90-82” W/NHS
16R13-16FSX-16FSX90-81” W/NHS
16R4-16FSX-16FSX-77” W/NHS
3/8” 30R7 PLAIN-106”
3/8” 30R7 PLAIN-89”
3/8” 30R7 PLAIN-14”
800.392.2686
65
RG74DXH Operator · Service · Maintenance Manual
Service Parts
ENGINE OIL FILTER - 804903
FUEL FILTER ASSEMBLY
PRIMARY FUEL FILTER - 804905
SECONDARY FUEL FILTER - 804904
CUTTER PUMP CHARGE FILTER ELEMENT - 805075
RESTRICTION INDICATOR - 805153
HYDRAULIC TANK FILTER ELEMENT - 805123
INNER AIR FILTER CARTRIDGE - 804906
SERVICE INDICATOR - 803607
FUEL CAP - 760780
ENGINE KEY - 804724
PARTS MANUAL - PMRG74DXH
OPERATION MANUAL - OBRG74DXH
OPERATION & SERVICE MANUAL - OSMRG74DXH
CUMMINS ENGINE MANUAL
CUTTER WHEEL TEETH
S
TRAIGHT COUNTER BORE
- 3144C
STRAIGHT THREADED - 3144T
ANGLE-OUT COUNTER BORE - 2933C
ANGLE-OUT THREADED - 2933T
ANGLE-OUT COUNTER BORE - 20432C
ANGLE-OUT THREADED - 20432T
66
RAYCO WARRANTY CERTIFICATE
A. General Outline
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.
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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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