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Rayco RG74T-R Operator, Service, Maintenance Manual
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Rayco RG74T-R Operator, Service, Maintenance Manual

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RG74T-R
OPERATOR · SERVICE · MAINTENANCE MANUAL
RAYCO MANUFACTURING © 2017 - ALL RIGHTS RESERVED
PRINTED IN USA
INDEX: OSMRG74T-R-17

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Summary of Contents for Rayco RG74T-R

  • Page 1 RG74T-R OPERATOR · SERVICE · MAINTENANCE MANUAL RAYCO MANUFACTURING © 2017 - ALL RIGHTS RESERVED PRINTED IN USA INDEX: OSMRG74T-R-17...
  • Page 2 RG74T-R Operator · Service · Maintenance Introduction This manual is published by Rayco Manufacturing, Inc. for the This Rayco machine was designed and manufactured by benefit of the users of Rayco products. Rayco Manufacturing, Rayco Manufacturing, Inc., Wooster, Ohio. Due to continuous Inc.

  • Page 3: Table Of Contents

    RG74T-R Operator · Service · Maintenance Table of Contents TABLE OF CONTENTS Foreword Safety Operation Maintenance Specifications Warranty 800.392.2686...

  • Page 4: Foreword

    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...
  • Page 5 RG74T-R Operator · Service · Maintenance Foreword Maintenance from air conditioner refrigerant through a lighted cigarette can cause bodily harm or death. The maintenance section is a guide to equipment care. Never put maintenance fluids into glass containers. Drain The Maintenance Interval Schedule lists the items to be all liquids into a suitable container.
  • Page 6 Machine Description • Cummins QSF3.8 diesel engine meets Tier 4 Final/ Stage IV emissions The Rayco RG74T-R is a high-production stump cutter • Does not require Diesel Exhaust Fluid (DEF) powered by a massive 3.8L Cummins 74hp diesel engine that generates peak torque of 295ft-lbs.
  • Page 7 RG74T-R Operator · Service · Maintenance Foreword General Lift & swing cylinders: 2 ½” bore x 7-3/8” stroke, 1-1/8” rod Weight: 5200 Lbs Maximum Oil Type: Tellus T46 Length: 150” Maximum Hydraulic Tank Capacity: 13.5 Gallons Height: 63” Maximum (Exhaust), 57” (Hood) Hydraulic Track Drive System Width: 35”...
  • Page 8 Breakdown of the serial number For Example:RG74T-R 001 01 17 RG74T-R - Type of Rayco equipment you have 001 - Three digit for the number of produced 01 - Two digit month, 01 = Jan., 02 = Feb., etc...
  • Page 9 RG74T-R Operator · Service · Maintenance 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 Serial Number Machine Engine Implement Implement Dealer Information...

  • Page 10: Safety

    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...
  • Page 11 RG74T-R Operator · Service · Maintenance Safety General Hazard Information 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.
  • Page 12 Always use a board or cardboard when you check for a leak. Leaking fluid that is under pressure can penetrate body Rayco recommends the use of dust masks or respirators tissue. Fluid penetration can cause serious injury and to be worn over the nose and mouth that protect the lungs possible death.
  • Page 13 RG74T-R Operator · Service · Maintenance Safety such as chipping brush, stump grinding, working near old Do not work beneath the cab of the machine unless the cab wood or chip piles, non-toxic nuisance dusts can be harmful. is properly supported.
  • Page 14 RG74T-R Operator · Service · Maintenance 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.
  • Page 15 Repair any lines that are loose or damaged. Leaks can Do not charge a frozen battery. This may cause an explosion. cause fires. Consult your Rayco dealer for repair or for Fire Extinguisher replacement parts.
  • Page 16 Maintenance Manual, “Reference Material”. Consult The safety decals located on this machine contain useful your Rayco dealer in order to obtain copies of the material. and important information which will help you to operate The information should be reviewed by every person that your machine safely.
  • Page 17 • Never hand-feed this machine for any reason. any needed repairs to certified service technician. Use only Rayco Approved Work Tools on this machine. Obey • Contact with moving parts, belts or rotating cutter wheels all the lift restrictions. Refer to Operation and Maintenance can kill, injure or dismember.
  • Page 18 When you work on side hills and when you work on slopes, consider the following important points: Only use work tools that are approved by Rayco for use on Rayco machines. Refer to the Operation and Maintenance • Speed of travel – At higher speeds, forces of inertia Manual, Rayco options.
  • Page 19 RG74T-R Operator · Service · Maintenance Safety LOCK-Out / Tag-Out Guidelines 2. Check to see that all workers and bystanders are located in a safe position. Always practice lock out tag out procedures when working on this machine. 3. Inform all affected personnel.
  • Page 20 Replacement parts which are cause the tow vehicle and transport trailer “combination” to authorized by Rayco are the only parts which should be begin WHIPPING, which is violent and uncontrollable sway. used for repair or replacement on this machine.
  • Page 21 Use the Your Tow Vehicle checklist at the end of these instructions. If you suspect or detect something is wrong, contact the nearest Rayco Dealer. Refer to the owner’s manual, decal instructions or an Safety Chains...
  • Page 22 RG74T-R Operator · Service · Maintenance Safety Unloading the Machine From the Rayco attach chains to the ball or to a ball mount that is removable. Trailer (optional equipment) The right chain hooks to the left side in the same manner.
  • Page 23 RG74T-R Operator · Service · Maintenance Safety 800.392.2686...

  • Page 24: Operation

    RG74T-R Operator · Service · Maintenance Operation...
  • Page 25 12. Back-up Remote Control 13. Remote Receiver LCM Before Operating the Machine 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...
  • Page 26 RG74T-R Operator · Service · Maintenance Operation Pre-Starting Inspection heed either direc tive will result in poor machine performance and se vere damage. Inspect the hydraulic system for leaks. Check the hydraulic Non Remote Start-Up oil level. Inspect the machine and perform each of the “Daily Inspections”...
  • Page 27 RG74T-R Operator · Service · Maintenance Operation Remote Function Linking Procedures In the event that you need to (re)link the transmitter and receiver together. Open side compartment, located next to the hydraulic tank as shown, and follow the steps listed below : •...
  • Page 28 The Command Cut® is only on while cutter wheel is engaged Swing Speed Manual Adjustment The RG74T-R comes equipped with a 50 1/2” wide blade. For convenience of trasporting through gates, or to load and unload on and off a trailer, the blade has wings (1) that can swing in to be only 34 1/2”...
  • Page 29 Keypad Remote (BackUp) Should your remote control fail, or batteries die in the field, the RG74T-R comes equipped with a Keypad Remote (4). The keypad is located in the compartment next to ignition key location. To utilize the keypad, lift the right side hood, unscrew the nuts (5) holding the keypad attached to the ceiling of the compartment.
  • Page 30 RG74T-R Operator · Service · Maintenance Operation Removing Stumps NOTICE Call 8-1-1 Before You Dig (USA Only) 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.
  • Page 31 RG74T-R Operator · Service · Maintenance Operation Stump Removal Procedure • Continue repeating this procedure until all of the amount of stump in the path of the downward swing of the 1: Prepare the machine at the stump: cutting wheel is gone.
  • Page 32 RG74T-R Operator · Service · Maintenance Operation Stopping The Machine Transporting the Machine The RG74T-R should only be transported with a proper working trailer. The preferred method, however, is towing it on a Rayco TR100L trailer (available from Rayco). NOTICE...
  • Page 33 RG74T-R Operator · Service · Maintenance Operation Machine Storage • Start the machine according to the “Starting the Engine” and “Pre-Operation Warm-up” sections of this manual 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.
  • Page 34 RG74T-R Operator · Service · Maintenance Operation Starting With Jumper Cables b. Connect the other end of the red positive (+) jumper cable to the positive (+) terminal of the battery of the NOTICE boost machine. Before attempting to start an engine that has been c.
  • Page 35 RG74T-R Operator · Service · Maintenance Operation 800.392.2686...

  • Page 36: Maintenance

    RG74T-R Operator · Service · Maintenance Maintenance Certified Engine Maintenance ways, and from steps. Secure all loose items such as lunch boxes, tools, and other Proper maintenance and repair is essential to keep the items that are not a part of the equipment.
  • Page 37 RG74T-R Operator · Service · Maintenance Maintenance Every 500 Hrs or 1 Year Maintenance Interval Daily or Every 10 Hrs Maintenance Interval Hydraulic Oil & Filter Change Engine Oil Level Check & Replace if needed Water Jacket Clean - see Cummins Manual Fuel Tank Level Check &...
  • Page 38 RG74T-R Operator · Service · Maintenance Maintenance Maintenance Log Date of Service Machine Hours Description of Service/ Maintenance Notes...
  • Page 39 RG74T-R Operator · Service · Maintenance Maintenance Maintenance Log Date of Service Machine Hours Description of Service/ Maintenance Notes 800.392.2686...
  • Page 40 RG74T-R Operator · Service · Maintenance 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.
  • Page 41 RG74T-R Operator · Service · Maintenance Maintenance Fuel Tank - Check Level, Fill & Drain 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).
  • Page 42 RG74T-R Operator · Service · Maintenance Maintenance Fuel Tank - Drain Fuel System Water Separator - Element NOTICE Element replacement frequency is determined by the Dispose of any drained fuel according to local contamination level in fuels. Fuel flow to the engine becomes environment protection regulations.
  • Page 43 RG74T-R Operator · Service · Maintenance Maintenance Hydraulic Oil - Drain 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.
  • Page 44 RG74T-R Operator · Service · Maintenance Maintenance Cooling System - Check NOTICE The coolant level should be checked daily. • When the radiator is empty, re-tighten the radiator drain plug (3). • When refilling the radiator, see your Cummins Engine Manual for coolant specifications.
  • Page 45 & reduce bearing life. • Number of Teeth for Depth of Cut: Rayco’s cutter wheels 1. Remove each cap carefully by prying with a screwdriver. are designed to provide an economical cutting wheel 2.
  • Page 46 Sharpening Teeth The Cutter Wheel on the RG74T-R uses 4 different types of SuperTeeth as shown below: DO NOT allow any tooth to wear too much before sharpening. Discard any tooth that has lost more than 1/8” of original bite.
  • Page 47 RG74T-R Operator · Service · Maintenance Maintenance 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.
  • Page 48 RG74T-R Operator · Service · Maintenance Maintenance Cutting Wheel Belt - Check & in and drop down into the 12-15 lbs. range at 1/2” Adjust Tension deflection. Smart Tension App Attention iPhone users. Mitsuboshi as designed an app for Apple iPhone users...
  • Page 49 RG74T-R Operator · Service · Maintenance Maintenance 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.
  • Page 50 RG74T-R Operator · Service · Maintenance Maintenance Track Adjustment - Check 5.5”) add grease to push the the end of the frame out Checking Tension to the 5.5” • Drive the machine a short distance forward and b) If the tension is too tight (the distance is greater backwards, then stop the engine.
  • Page 51 RG74T-R Operator · Service · Maintenance Maintenance Track Drive Oil - Check NOTICE Use diesel engine oil SAE-30-CD or equivalent as gear lubricating oil. Any recommended gear oil can be used, but drain old oil completely To check the track drive oil the drive unit must be on flat, level ground and the drive placed in accordance to the below figure and plug (2) removed.
  • Page 52 RG74T-R Operator · Service · Maintenance Main Wiring Harness 35170-G LOOM PLUG '21' CW MOTOR TYPE 'G' 114" TYPE ' PLUG '20' 18" WATER IN FUEL TYPE 'G' START PLUG '19' 18" CHARGE FILTER TEMP TEMP ENGINE ENGINE TYPE 'G'...
  • Page 53 RG74T-R Operator · Service · Maintenance Main Wiring Harness 35170-G LOOM 6" 6" 6" 6" 6" 6" '21' COM GRD 28" BATTERY TYPE 'P' 3/8 RING COM GRD 114" 2" BATTERY 2" TYPE 'P' 3/8 RING 6" KEY FUSE 20A 1"...
  • Page 54 RG74T-R Operator · Service · Maintenance Main Wiring Harness 35170-G COLOR LEGEND: RED = RED BLK = BLACK BRN = BROWN ORG = ORANGE YLW = YELLOW TAN = TAN PUR = PURPLE GRN = GREEN BLU = BLUE GRY = GRAY...
  • Page 55 RG74T-R Operator · Service · Maintenance Main Wiring Harness 35170-G 800.392.2686...
  • Page 56 RG74T-R Operator · Service · Maintenance Main Wiring Harness 35170-G FROM WIRE DESCRIPTION GAUGE COLOR PLUG# PIN# (FUNCTION IMPRINT) PLUG# PIN # COM GND CAN (+) 18 *TWISTED CAN (-) 18 *TWISTED SERIAL GND HYD OIL LEVEL SWITCH STARTER LOCKOUT SIG...
  • Page 57 RG74T-R Operator · Service · Maintenance Main Wiring Harness 35170-G ECU GROUND ECM RETURN ECU GROUND INTAKE HEAT RELAY SIG HS RETURN STARTER LOCKOUT SIG COM GND ECU GROUND BAT/ENG BLOCK GND RUN POWER (12V+) RUN POWER (12V+) COM GND...
  • Page 58 RG74T-R Operator · Service · Maintenance Hydraulic Schematic 805039...
  • Page 59 RG74T-R Operator · Service · Maintenance Hydraulic Schematic 805039 HOSE "A" IS CLEAR POLYURETHANE FUEL LINE 800.392.2686...
  • Page 60 RG74T-R Operator · Service · Maintenance Hydraulic Hose Kit 805039H-H ITEM QTY PART # DESCRIPTION 8R17-8FSX-8FSX-114” 6R16-6FSX-6FSX90-21” (SAE 100R16) 3/8” 30R7 PLAIN-47” (SAE 30R7) 6R16-6FSX-6FSX90-19” (SAE 100R16) 3/8” 30R7 PLAIN-64” (SAE 30R7) 6R16-6FSX-6FSX90-18” (SAE 100R16) 3/8” 30R7 PLAIN-89” (SAE 30R7) 12R4 PLAIN-94”...
  • Page 61 RG74T-R Operator · Service · Maintenance Hydraulic Adapter Kit 805039A-F FF3800-08-06 (08 MORFS X 06 ITEM QTY PART # DESCRIPTION MORB BSPP W/ WASH) FF6400-04-06 (04 MORFS X 06 199-FF3800-0608 (06 MORFS X MORB STRAIGHT) 08 MORB BSPP-ORING ONLY NO FF6801-04-06 (90°...

  • Page 62: Specifications

    RG74T-R Operator · Service · Maintenance Lubrication & Fluid Specifications & F AYCO UBRICATION LUID 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.
  • Page 63 A synthetic 75W-140 or 80W-140 heavy duty GL-5 gear oil could also be used in warm climates to extend gear life. RG74T-R Operator · Service · Maintenance MWF Hydrostat Drive Lubrication & Fluid Specifications The Hydrostat drive is shipped with Mobil 1 synthetic engine oil, SAE 15W-50.
  • Page 64 RG74T-R Operator · Service · Maintenance 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...

  • Page 65: Warranty

    Where permitted by law, the purchaser’s only remedies in contact manufacturer directly. connection with the branch of performance on any warranty on any Rayco product are those set forth on this page. In 4. Various Components no event will the dealer and or Rayco be liable for incidental a.
  • Page 66 We care about your safety. When operating your RAYCO® machinery always wear an ap- proved 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.