Kubota RT120Q Operator's Manual
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Kubota RT120Q Operator's Manual

Kubota RT120Q Operator's Manual

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RT120Q
Operator's
Manual
Issue 2.0
053-2634
Original Instruction

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Summary of Contents for Kubota RT120Q

  • Page 1 RT120Q Operator’s Manual Issue 2.0 053-2634 Original Instruction...

  • Page 2: Table Of Contents

    RT120Q Operator’s Manual Overview - 1 Overview Chapter Contents Serial Number Location ..... . 2 Intended Use ....... 3 Equipment Modification .

  • Page 3: Serial Number Location

    RT120Q Operator’s Manual Overview - 2 Serial Number Location Serial Number Location Record serial numbers and date of purchase in spaces provided. RT120Q (1) and engine serial numbers (2) are located as shown. t37om002w.eps Date of manufacture Date of purchase...

  • Page 4: Intended Use

    RT120Q Operator’s Manual Overview - 3 Intended Use Intended Use The RT120Q is a riding trencher designed to install buried service lines of various sizes using a variety of ® Ditch Witch attachments. Attachment Max. width/diameter Max. depth H910 trencher 24”...

  • Page 5: Unit Components

    RT120Q Operator’s Manual Overview - 4 Unit Components Unit Components t37om003w.eps 1. Rollover Protective Structure (ROPS) 4. Engine compartment 2. Operator station 5. Backfill blade (optional) 3. Control console...

  • Page 6: Operator Orientation

    RT120Q Operator’s Manual Overview - 5 Operator Orientation Operator Orientation 1. Front of unit 3. Rear of unit 2. Right of unit 4. Left of unit Right and left sides of machine are determined by facing front of unit while seated at the controls.
  • Page 7 RT120Q Operator’s Manual Overview - 6 About This Manual...

  • Page 8: Foreword

    RT120Q Operator’s Manual Foreword - 7 Foreword This manual is an important part of your equipment. It provides safety information and operation ® instructions to help you use and maintain your Ditch Witch equipment. Read this manual before using your equipment. Keep it with the equipment at all times for future reference.
  • Page 9 RT120Q Operator’s Manual Foreword - 8 RT120 T4i Operator’s Manual Issue number 2.0/OM-06/17 Part number 053-2634 Copyright 2013, 2017 by The Charles Machine Works, Inc. and Ditch Witch are registered trademarks of The Charles Machine Works, Inc. This product and its use may be covered by one or more patents at http://patents.charlesmachine.works.

  • Page 10: Safety

    RT120Q Operator’s Manual Contents - 9 Contents Overview machine serial number, information about the type of work this machine is designed to perform, basic machine components, and how to use this manual Foreword part number, revision level, and publication date of this manual, and factory contact...
  • Page 11 RT120Q Operator’s Manual Contents - 10 Drill procedures for drilling procedures for sawing Systems and Equipment chain, teeth, sprockets, and optional equipment Complete the Job procedures for backfilling and restoring the jobsite and rinsing and storing equipment Service service intervals and instructions for this machine including lubrication, replacement...
  • Page 12 RT120Q Operator’s Manual Safety - 11 Safety Chapter Contents Guidelines ....... . 12 California Proposition 65 Warning .

  • Page 13: Guidelines

    RT120Q Operator’s Manual Safety - 12 Guidelines Guidelines When you see this safety alert sign, carefully read and follow all instructions. YOUR SAFETY IS AT STAKE. Read this entire section before using your equipment. Follow these guidelines before operating any jobsite equipment: •...

  • Page 14: Emergency Procedures

    RT120Q Operator’s Manual Safety - 13 Emergency Procedures Emergency Procedures Jobsite hazards could cause death or serious injury. Use correct equipment and work methods. Use and maintain proper safety equipment. Before operating any equipment, review emergency procedures and check that all safety precautions have been taken.

  • Page 15: If An Electric Line Is Damaged

    RT120Q Operator’s Manual Safety - 14 Emergency Procedures If an Electric Line is Damaged If you suspect an electric line has been damaged and you are on tractor, DO NOT MOVE. Remain on tractor and take the following actions. The order and degree of action will depend upon the situation.

  • Page 16: If A Gas Line Is Damaged

    RT120Q Operator’s Manual Safety - 15 Emergency Procedures If a Gas Line is Damaged Fire or explosion possible. Fumes could ignite and cause burns. No smoking, no flame, no spark. 275-419 (2P) Explosion possible. Serious injury or equipment damage could occur.

  • Page 17: If A Fiber Optic Cable Is Damaged

    RT120Q Operator’s Manual Safety - 16 Emergency Procedures If a Fiber Optic Cable is Damaged Do not look into cut ends of fiber optic or unidentified cable. Vision damage can occur. Contact utility company. If Machine Catches on Fire Perform emergency shutdown procedure and then take the following actions. The order and degree of action will depend on the situation.

  • Page 18: Safety Alert Classification

    RT120Q Operator’s Manual Safety - 17 Safety Alert Classifications Safety Alert Classifications These classifications and the icons defined on the following pages work together to alert you to situations which could be harmful to you, jobsite bystanders or your equipment. When you see these words and icons in the book or on the machine, carefully read and follow all instructions.

  • Page 19: Machine Safety Alerts

    RT120Q Operator’s Manual Safety - 18 Machine Safety Alerts Machine Safety Alerts Fire or explosion possible. Do not use starter fluid. 273-459 (2P), 274-206 (2P), 700-206 (2P) Contents under pressure. Relieve pressure before opening. Death or injury could occur. 270-2732 Moving parts could cut off hand or foot.
  • Page 20 RT120Q Operator’s Manual Safety - 19 Machine Safety Alerts Rollover could kill or crush. Wear seat belt. 275-303 Read operator’s manual. Follow safety rules and know how to use all controls. Your safety is at stake. 273-475...
  • Page 21 RT120Q Operator’s Manual Safety - 20 Attachment Safety Alerts Attachment Safety Alerts A920 Moving parts could cut off hand. Keep hands away. Crushing weight could cause death or serious injury. Use proper procedures and equipment or stay away.
  • Page 22 RT120Q Operator’s Manual Safety - 21 Attachment Safety Alerts H910 Moving digging teeth will cause death or serious injury. Trench cave-in can cause you to fall. Stay away. Tiedown location. See Transport chapter for more information. DANGER stripe decal. See Parts Manual for replacement part numbers.
  • Page 23 RT120Q Operator’s Manual Safety - 22 Attachment Safety Alerts DANGER decal. See Parts Manual for replacement part numbers. H911 Moving digging teeth will cause death or serious injury. Trench cave-in can cause you to fall. Stay away. Lift point. See Transport chapter for more information.
  • Page 24 RT120Q Operator’s Manual Safety - 23 Attachment Safety Alerts Moving parts could cut off hand or foot. Stay away. 275-184, 273-546 Tiedown location. See Transport chapter for more information. DANGER stripe decal. See Parts Manual for replacement part numbers. DANGER decal. See Parts Manual for replacement part numbers.
  • Page 25 RT120Q Operator’s Manual Safety - 24 Attachment Safety Alerts H1032 Tiedown location. See Transport chapter for more information. Lift point. See Transport chapter for more information. Crushing weight could cause death or serious injury. Use proper procedures and equipment or stay away.
  • Page 26 RT120Q Operator’s Manual Safety - 25 Attachment Safety Alerts H1052 Tiedown location. See Transport chapter for more information. Lift point. See Transport chapter for more information. Crushing weight could cause death or serious injury. Use proper procedures and equipment or stay away.
  • Page 27 RT120Q Operator’s Manual Safety - 26 Attachment Safety Alerts Moving parts could cut off hand. Keep hands away. DANGER stripe decal. See Parts Manual for replacement part numbers. Moving digging teeth will cause death or serious injury. Trench cave-in can cause you to fall. Stay away.
  • Page 28 RT120Q Operator’s Manual Safety - 27 Attachment Safety Alerts H1140 Moving parts could cut off hand. Keep hands away. Tiedown location. See Transport chapter for more information. Lift point. See Transport chapter for more information.
  • Page 29 RT120Q Operator’s Manual Safety - 28 Attachment Safety Alerts Flying objects thrown by machine may strike people. Wear safety glasses and hard hat. Moving digging teeth will cause serious injury or death. Stay away. DANGER stripe decal. See Parts Manual for replacement part numbers.

  • Page 30: Controls

    RT120Q Operator’s Manual Controls - 29 Controls Chapter Contents Center Console ......30 Graphic Display.

  • Page 31: Center Console

    RT120Q Operator’s Manual Controls - 30 Center Console Center Console t37om001w.eps 1. Auxiliary outlet 7. Reel carrier switch* 2. Horn button 8. Reel winder mode selector switch* 3. Start override switch 9. Ignition key switch 4. Axle lock switch 10. Ground drive foot control 5.
  • Page 32 RT120Q Operator’s Manual Controls - 31 Center Console Item Description Notes 1. Auxiliary outlet Provides power for other Power output is 12V, 10A. equipment. c00ic179h.eps 2. Horn button To sound horn, press. c00ic044h.eps 3. Start override switch For engine override, press.
  • Page 33 RT120Q Operator’s Manual Controls - 32 Center Console Item Description Notes 5. Graphic display Graphic symbols are See more information in “Graphic displayed for indicators and Display” on page 34. conditions previously shown with gauges. c00ic604w.eps 6. Ground drive speed...
  • Page 34 RT120Q Operator’s Manual Controls - 33 Center Console Item Description Notes 9. Ignition switch To start engine, insert key and IMPORTANT: If engine does not start turn clockwise. on first attempt, check that all interlock requirements have been To stop engine, turn met, return switch to STOP, and try counterclockwise.

  • Page 35: Graphic Display

    RT120Q Operator’s Manual Controls - 34 Graphic Display Graphic Display AM/PM x100 0.0 v 0 PSI 0.0 H t37om048w.eps The graphic display module shows engine RPM and has icons for other functions. Soft keys allow the operator to toggle between various screens and functions.
  • Page 36 RT120Q Operator’s Manual Controls - 35 Graphic Display Item Description Notes Operator presence Indicates operator presence and start interlock condition. c00ic001w.eps Fuel level Displays fuel level and percentage. c00ic003w.eps Battery voltage Displays battery voltage. c00ic008w.eps Day/Night mode Indicates selected mode.
  • Page 37 RT120Q Operator’s Manual Controls - 36 Graphic Display Item Description Notes Engine hours Displays engine hours. 0.0 H c00ic020w.eps Engine oil pressure Displays engine oil pressure. c00ic005w.eps Engine coolant temperature Displays coolant temperature. c00ic004w.eps Axle lock Displays status of axle differential lock.
  • Page 38 RT120Q Operator’s Manual Controls - 37 Graphic Display Item Description Notes Ground drive speed/ Displays ground drive direction direction of travel and speed as a percentage. c00ic006w.eps Ground drive gear indicator Displays selected gear in center of icon. c00ic009w.eps Cruise control indicator Displays cruise mode status.
  • Page 39 RT120Q Operator’s Manual Controls - 38 Graphic Display Item Description Notes Hydraulic filter restriction Displays restriction status. indicator Hydraulic fluid high Displays information about temperature indicator hydraulic fluid temperature. c00ic037t.eps Menu indicator Displays menu icon over key c00ic031w.eps...
  • Page 40 RT120Q Operator’s Manual Controls - 39 Graphic Display Main Menu SYSTEM USER GAUGE DIOGNOSTICS SETTINGS SETTINGS DISPLAY t33om093w.eps Press the center soft key to display the main menu screen, which has icons for other functions. Soft keys below on screen icons allow the operator to toggle between various screens and functions.
  • Page 41 RT120Q Operator’s Manual Controls - 40 Graphic Display Item Description Notes User Settings Allows operator to customize settings. c00ic016w.eps Gauge Display Press the soft key below this on screen icon to select. c00ic017w.eps Diagnostics Displays interlock icons and Note: If diagnostic codes are ®...
  • Page 42 RT120Q Operator’s Manual Controls - 41 Graphic Display System Settings SYSTEM SETTINGS Component VERSION Part No. Application 10155 Release 78333159 10081 Release 78333166 Bootloader 10146 Release 78333156 Configuration Beta RT120QT4i Copyright 2012 The Charles Machine Works Back t37om043w.eps Item Description...
  • Page 43 RT120Q Operator’s Manual Controls - 42 Graphic Display User Settings USER SETTINGS Ambient Light Brightness 100% Units USA Standard Language English Back Save Reset t33om092w.eps Item Description Notes Back Press soft key to return to Press center soft key to display gauge previous screen.
  • Page 44 RT120Q Operator’s Manual Controls - 43 Graphic Display Item Description Notes Save Press soft key to save settings. c00ic013w.eps Reset Press soft key to return to default settings. c00ic014w.eps Day/Night Press soft key to select day or night mode. c00ic010w.eps...
  • Page 45 RT120Q Operator’s Manual Controls - 44 Graphic Display Diagnostics GAUGE MAIN MENU DISPLAY t37om044w.eps Item Description Notes Attachment Neutral Indicates attachment controls in neutral position. c00ic021w.eps Operator Presence Indicates operator presence for start interlock status. c00ic001w.eps...
  • Page 46 RT120Q Operator’s Manual Controls - 45 Graphic Display Item Description Notes Ground Drive Neutral Indicates ground drive controls in neutral position. c00ic022w.eps Main Menu Press soft key to return to Press center soft key to display gauge previous screen. screen.

  • Page 47: Right Console

    RT120Q Operator’s Manual Controls - 46 Right Console Right Console t37om005w.eps 1. Backfill blade lift/tilt/Reel winder control 4. Frame tilt control 2. Rear steer control* 5. Throttle 3. Rear steer manual/auto control* *Optional...
  • Page 48 RT120Q Operator’s Manual Controls - 47 Right Console Item Description Notes 1. Backfill blade lift/tilt Backfill blade mode: control • To lower, move forward. • To float, move forward to end. • To raise, move backward. • To tilt right side down, move right.
  • Page 49 RT120Q Operator’s Manual Controls - 48 Item Description Notes 4. Frame tilt control To tilt left, press left. To tilt right, press right. c00ic626w.eps 5. Throttle To increase speed, move forward. To decrease speed, move rearward.

  • Page 50: Left Console

    RT120Q Operator’s Manual Controls - 49 Left Console Left Console t37om006w.eps 1. Parking brake control 1. Parking brake control To set brake, pull handle up. When parking brake is set, ground drive is disabled. To release brake, push handle down.
  • Page 51 RT120Q Operator’s Manual Controls - 50 Rear Console Rear Console t37om007w.eps 1. Cruise control selector switch 2. Cruise control rpm dial control 1. Cruise control selector To turn on, press top. Switch Turn on cruise control only when: indicator and display should indicate that cruise mode is •...
  • Page 52 RT120Q Operator’s Manual Controls - 51 2. Cruise control rpm dial To decrease engine load This typically decreases engine load control while using cruise control, temporarily. turn clockwise. To increase engine load while This typically increases engine load using cruise control, turn temporarily.

  • Page 53: Seat Console

    RT120Q Operator’s Manual Controls - 52 Seat Console Seat Console t33om002w.eps t33om002w.eps 1. Ground drive speed control 2. Attachment speed/direction control Item Description Notes 1. Ground drive speed To go faster in either NOTICE: Control does not control direction, move farther from automatically return to neutral.
  • Page 54 RT120Q Operator’s Manual Controls - 53 Seat Console Item Description Notes 2. Attachment speed/ To go faster in either NOTICE: Control does not direction control direction, move farther from automatically return to neutral. neutral. To stop, return to center. c00ic632w.eps...

  • Page 55: Seat Deck

    RT120Q Operator’s Manual Controls - 54 Seat Deck Seat Deck t33om003w.eps t33om003w.eps 1. Seat belt 4. Seat height adjustment lock 2. Armrest adjustment control 5. Seat pivot control 3. Seat slide control Item Description Notes 1. Seat belt To fasten, insert latch into buckle.
  • Page 56 RT120Q Operator’s Manual Controls - 55 Seat Deck Item Description Notes 3. Seat slide control To slide seat forward or backward, pull, then adjust seat. To lock seat in place, release. 4. Seat height adjustment To lock seat height, turn lock clockwise.

  • Page 57: Trencher Controls

    RT120Q Operator’s Manual Controls - 56 Trencher Controls Trencher Controls t37om008w.eps 1. Trencher slide control* 3. Boom lift control 2. Trench cleaner lift control* *optional Item Description Notes 1. Trencher slide control To slide trencher right, push. (H911 only) To slide trencher left, pull.
  • Page 58 RT120Q Operator’s Manual Controls - 57 Trencher Controls Item Description Notes 2. Trench cleaner lift To lower, push. control To raise, pull. 3. Boom lift control To lower, push. To raise, pull.

  • Page 59: Plow Controls

    RT120Q Operator’s Manual Controls - 58 Plow Controls Plow Controls t37om009w.eps 1. Plow swing control 3. Plow lift control 2. Blade steer control 4. Stow lock control Item Description Notes 1. Plow swing control To swing left, pull. NOTICE: To swing right, push.
  • Page 60 RT120Q Operator’s Manual Controls - 59 Plow Controls Item Description Notes 2. Blade steer control To steer right, push. To steer left, pull. c00ic203h.eps 3. Plow lift control To raise, pull. NOTICE: To lower, push. • If soil conditions allow, operate in float position.

  • Page 61: Combo Controls

    RT120Q Operator’s Manual Controls - 60 Combo Controls Combo Controls t37om010w.eps 1. Plow swing control 4. Boom lift control 2. Blade steer control 5. Plow stow lock control 3. Plow lift control 6. Trench / Plow switch Item Description Notes 1.
  • Page 62 RT120Q Operator’s Manual Controls - 61 Combo Controls 2. Blade steer control To steer right, push. To steer left, pull. c00ic203h.eps 3. Plow lift control To raise, pull. NOTICE: To lower, push. • If soil conditions allow, operate in float position.
  • Page 63 RT120Q Operator’s Manual Controls - 62 Combo Controls 6. Trench / Plow switch To trench, set switch to trench position. To plow, set switch to plow position.

  • Page 64: Backhoe Console

    RT120Q Operator’s Manual Controls - 63 Backhoe Console Backhoe Console t37om046w.eps 1. Remote backfill blade control* 7. Swing lock pin 2. Left stabilizer control 8. Ground drive switch 3. Boom/Swing control 9. Remote engine stop switch 4. Remote throttle control switch 10.
  • Page 65 RT120Q Operator’s Manual Controls - 64 Backhoe Console Item Description Notes 1. Remote backfill blade To lower, push. control To raise, pull. 2. Left stabilizer control To lower, push out. To raise, pull in. 3. Boom/Swing control To swing boom left, move left.
  • Page 66 RT120Q Operator’s Manual Controls - 65 Backhoe Console Item Description Notes 5. Remote throttle enable To enable remote throttle This switch must be returned to the control, press top. OFF position for normal throttle control at tractor. To disable remote throttle control, press bottom.
  • Page 67 RT120Q Operator’s Manual Controls - 66 Backhoe Console Item Description Notes 9. Remote engine stop Press to stop engine For normal engine shutdown, use switch immediately. ignition switch. Note: This switch must be returned to the UP position to allow engine restarting.

  • Page 68: Saw Controls

    RT120Q Operator’s Manual Controls - 67 Saw Controls Saw Controls t37om045w.eps 1. Saw slide control 2. Saw lift control Item Description Notes 1. Saw slide control To slide saw right, push. To slide saw to center, pull.
  • Page 69 RT120Q Operator’s Manual Controls - 68 Item Description Notes 2. Saw lift control To lower, push. To raise, pull. c00ic209h.eps...

  • Page 70: Drill Controls

    RT120Q Operator’s Manual Controls - 69 Drill Controls Drill Controls t33om063w.eps 1. Drilling attachment control 2. Drilling attachment Item Description Notes 1. Drilling attachment To rotate clockwise, press IMPORTANT: Always rotate control bore. clockwise during drilling and backreaming. Rotate To rotate counterclockwise, counterclockwise only to dislodge a press reverse.

  • Page 71: Battery Disconnect

    RT120Q Operator’s Manual Controls - 70 Battery Disconnect Battery Disconnect t37om011w.eps 1. Battery disconnect switch Item Description Notes 1. Battery disconnect To connect, move left. NOTICE: Do not operate battery switch switch with engine running. To disconnect, move right. c00ic654w.eps...

  • Page 72: Operation Overview

    RT120Q Operator’s Manual Operation Overview - 71 Operation Overview Chapter Contents Planning........72 Trenching.

  • Page 73: Planning

    RT120Q Operator’s Manual Operation Overview - 72 Planning Planning 1. Gather information about jobsite. See page 76. 2. Inspect jobsite. See page 77. 3. Classify jobsite. See page 78. 4. Select chain and teeth to match your soil type, if necessary. See page 148 5.

  • Page 74: Drilling

    RT120Q Operator’s Manual Operation Overview - 73 Drilling Drilling 1. Start unit. See page 84. 2. Dig approach trench and target trench. See page 128. 3. Assemble drill string and position tractor. See page 130. 4. Begin drilling. See page 131.
  • Page 75 RT120Q Operator’s Manual Operation Overview - 74 Leaving Jobsite...

  • Page 76: Prepare

    RT120Q Operator’s Manual Prepare - 75 Prepare Chapter Contents Gather Information ......76 • Review Job Plan ......... . .76 •...

  • Page 77: Gather Information

    RT120Q Operator’s Manual Prepare - 76 Gather Information Gather Information A successful job begins before you dig. The first step in planning is reviewing information already available about the job and jobsite. Review Job Plan Review blueprints or other plans. Check for information about existing or planned structures, elevations, or proposed work that may be taking place at the same time.

  • Page 78: Inspect Site

    RT120Q Operator’s Manual Prepare - 77 Inspect Site Inspect Site Identify Hazards Inspect jobsite before transporting equipment. Check for the following: • overall grade or slope • changes in elevation such as hills or other open trenches • obstacles such as buildings, railroad crossings, or streams •...

  • Page 79: Classify Jobsite

    RT120Q Operator’s Manual Prepare - 78 Classify Jobsite Classify Jobsite Jobsite hazards could cause death or serious injury. Use correct equipment and work methods. Use and maintain proper safety equipment. To help avoid injury: • Wear personal protective equipment including hard hat, safety eye wear, and hearing protection.

  • Page 80: Apply Precautions

    RT120Q Operator’s Manual Prepare - 79 Classify Jobsite Apply Precautions Once classified, precautions appropriate for jobsite must be taken. Follow U.S. Department of Labor regulations on excavating and trenching (Part 1926, Subpart P) and other similar regulations. Electric Jobsite Precautions Use one or both of these methods.

  • Page 81: Check Supplies And Prepare Equipment

    RT120Q Operator’s Manual Prepare - 80 Check Supplies and Prepare Equipment Check Supplies and Prepare Equipment Check Supplies • fuel • keys • personal protective equipment, such as hard hat and safety glasses Prepare Equipment Fluid Levels • fuel •...

  • Page 82: Assemble Accessories

    RT120Q Operator’s Manual Prepare - 81 Check Supplies and Prepare Equipment Assemble Accessories Fire Extinguisher If required, mount a fire extinguisher near the power unit but away from possible points of ignition where shown. The fire extinguisher should always be classified for both oil and electric fires.
  • Page 83 RT120Q Operator’s Manual Prepare - 82 Check Supplies and Prepare Equipment...

  • Page 84: Drive

    RT120Q Operator’s Manual Drive - 83 Drive Chapter Contents Start Unit ....... . . 84 Drive .

  • Page 85: Start Unit

    RT120Q Operator’s Manual Drive - 84 Start Unit Start Unit Before operating tractor, read engine manufacturer’s starting and operating instructions. Read operator’s manual. Follow safety rules and know how to use all controls. Your safety is at stake. 273-475 To help avoid injury: Wear hard hat, safety glasses, and other protective equipment required by job.

  • Page 86: Drive

    RT120Q Operator’s Manual Drive - 85 Drive 8. When cold start wait indicator turns off, turn ignition switch clockwise to start tractor. Warning alarm will sound. Indicators will light. • If engine does not start, ensure start interlock conditions are met.

  • Page 87: Safe Slope Operation

    RT120Q Operator’s Manual Drive - 86 Drive Safe Slope Operation Tipover possible. Machine can tip over and crush you. To help avoid injury: • Always operate with heavy end uphill. • Drive cautiously at all times. • Never jerk control levers. Use a steady even motion.

  • Page 88: Shut Down

    RT120Q Operator’s Manual Drive - 87 Shut Down Shut Down 1. When job is complete, drive unit to level ground. 2. Move ground drive control to neutral. 3. Set parking brake and verify parking brake indicator is on. 4. Lower all unstowed attachments to ground.
  • Page 89 RT120Q Operator’s Manual Drive - 88 Shut Down...

  • Page 90: Transport

    RT120Q Operator’s Manual Transport - 89 Transport Chapter Contents Lift ........90 •...

  • Page 91: Lift

    RT120Q Operator’s Manual Transport - 90 Lift Lift Crushing weight. If load falls or moves it could kill or crush you. Stay away. Read operator’s manual. Follow safety rules and know how to use all controls. Your safety is at stake.
  • Page 92 RT120Q Operator’s Manual Transport - 91 Lift Centerline Trencher Use crane capable of supporting the equipment's size and weight. See “Specifications” on page 193 or measure and weigh equipment before lifting. Traversing Trencher Use crane capable of supporting the equipment's size and weight. See “Specifications”...
  • Page 93 RT120Q Operator’s Manual Transport - 92 Lift Plow Use crane capable of supporting the equipment's size and weight. See “Specifications” on page 193 or measure and weigh equipment before lifting. Reel Carrier Use crane capable of supporting the equipment's size and weight. See “Specifications”...

  • Page 94: Tie Down

    RT120Q Operator’s Manual Transport - 93 Tie Down Tie Down Read operator’s manual. Follow safety rules and know how to use all controls. Your safety is at stake. 273-475 Points Tiedown points are identified by tiedown decals. Securing to trailer at other points is unsafe and can damage machinery.
  • Page 95 RT120Q Operator’s Manual Transport - 94 Tie Down Traversing Trencher Lower trencher to trailer deck and chain at attachment frame. Ensure chains are tight before transporting. IMPORTANT: If trencher is equipped with a trench cleaner, ensure that trench cleaner shoe is fully up and extra bolt (found in operator’s manual compartment)
  • Page 96 RT120Q Operator’s Manual Transport - 95 Tie Down Plow Lower plow to trailer deck and chain at attachment frame and vibrator box. Make sure chains are tight before transporting. NOTICE: • Engage attachment stow lock and swing lock devices in addition to securing at tiedowns.

  • Page 97: Haul

    RT120Q Operator’s Manual Transport - 96 Haul Haul Read operator’s manual. Follow safety rules and know how to use all controls. Your safety is at stake. 273-475 To help avoid injury: • Read trailer operator’s manual before loading or transporting your machine. Incorrectly loaded machine can slip or cause trailer sway.
  • Page 98 RT120Q Operator’s Manual Transport - 97 Haul Load Crushing weight. If load falls or moves it could kill or crush you. Stay away. To help avoid injury: • Attach trailer to tow vehicle before loading or unloading. • Load and unload trailer on level ground.
  • Page 99 RT120Q Operator’s Manual Transport - 98 Haul Unload Crushing weight. If load falls or moves it could kill or crush you. Stay away. To help avoid injury: • Attach trailer to tow vehicle before loading or unloading. • Load and unload trailer on level ground.

  • Page 100: Retrieve

    RT120Q Operator’s Manual Transport - 99 Retrieve Retrieve Read operator’s manual. Follow safety rules and know how to use all controls. Your safety is at stake. 273-475 Under normal conditions, tractor should not be towed. If tractor becomes disabled and retrieval is necessary: •...
  • Page 101 RT120Q Operator’s Manual Transport - 100 Retrieve...

  • Page 102: Trench

    RT120Q Operator’s Manual Trench - 101 Trench Chapter Contents Set Up........102 Operate .
  • Page 103 RT120Q Operator’s Manual Trench - 102 Set Up Set Up EMERGENCY SHUTDOWN - Turn ignition switch to STOP. Crushing weight could cause death or serious injury. Stay away. To help avoid injury: Use attachments or counterweights to make front and rear loads balance when all ®...
  • Page 104 RT120Q Operator’s Manual Trench - 103 Set Up 1. If using optional trench cleaner, remove bolt installed for transport (shown). 2. Fasten and adjust seat belt. 3. Start tractor. See page 84 for start-up procedures. 4. Drive to starting point. Move in line with planned trench.
  • Page 105 RT120Q Operator’s Manual Trench - 104 Operate Operate Breathing crystalline silica dust may cause lung disease. Cutting, drilling, or working materials such as concrete, sand, or rock containing quartz may result in exposure to silica dust. Use dust control methods or appropriate breathing protection when exposed to silica dust.
  • Page 106 RT120Q Operator’s Manual Trench - 105 Operate 3. Move attachment speed/direction control to desired speed. DIGGING CHAIN WILL MOVE. Moving digging teeth will cause serious injury or death. Stay away. To help avoid injury: • Ensure parking brake is set.
  • Page 107 RT120Q Operator’s Manual Trench - 106 Finish Job 11. Operate engine at full throttle when working. NOTICE: • Do not make sharp turns. Lower boom to full depth when turning. • If an object becomes lodged in chain, move attachment speed/direction control to neutral and raise boom slightly.

  • Page 108: Plow

    RT120Q Operator’s Manual Plow - 107 Plow Chapter Contents Set Up........108 •...

  • Page 109: Set Up

    RT120Q Operator’s Manual Plow - 108 Set Up Set Up EMERGENCY SHUTDOWN - Turn ignition switch to STOP. Crushing weight could cause death or serious injury. Stay away. To help avoid injury: Keep everyone at least 10’ (3 m) from machine, attachments, and their range of movement.

  • Page 110: Position Tractor

    RT120Q Operator’s Manual Plow - 109 Set Up Position Tractor IMPORTANT: If material must be at a constant depth, dig starting and target trenches. 1. Fasten and adjust seat belt. 2. Start tractor. See page 84 for start-up procedures. 3. Drive to starting point. Move in line with planned trench. See “Drive” on page 85.

  • Page 111: Prepare Tractor

    RT120Q Operator’s Manual Plow - 110 Set Up Feed Product ® NOTICE: Use only genuine Ditch Witch cable guide. 1. Remove cable guide. 2. Feed cable through tube from top to bottom. 3. Replace cable guide and tighten fasteners. 4. Secure cable.

  • Page 112: Operate

    RT120Q Operator’s Manual Plow - 111 Operate Operate Crushing weight could cause death or serious injury. Stay away. Electric shock will cause death or serious injury. Stay away. 274-049 To help avoid injury: Expose lines by hand before digging. Cutting high voltage cable can cause electrocution Read operator’s manual.

  • Page 113: Special Plowing

    RT120Q Operator’s Manual Plow - 112 Operate Special Plowing ® Your Ditch Witch equipment allows you to plow four ways: normal plowing, offset plowing (1), coordinated plowing (2), and crabbing (3). NOTICE: Oversteering blade may damage blade or cable. Offset Plow Offset plowing can be used to plow next to a road while keeping tracks on a more stable surface or in similar conditions.

  • Page 114: Finish Job

    RT120Q Operator’s Manual Plow - 113 Finish Job Finish Job 1. When installation is complete, move plow swing out of float. 2. Move ground drive hand control to neutral. 3. With vibrator running, raise plow to ground level while reducing vibrator speed.
  • Page 115 RT120Q Operator’s Manual Plow - 114 Finish Job...

  • Page 116: Reel Carrier

    RT120Q Operator’s Manual Reel Carrier - 115 Reel Carrier Chapter Contents Set Up........116 •...

  • Page 117: Set Up

    RT120Q Operator’s Manual Reel Carrier - 116 Set Up Set Up Crushing weight. If load falls or moves it could kill or crush you. Stay away. Read operator’s manual. Follow safety rules and know how to use all controls. Your safety is at stake.

  • Page 118: Prepare To Plow

    RT120Q Operator’s Manual Reel Carrier - 117 Set Up 6. After installing arbor, latch retainers (shown). t48om056w.eps Prepare to Plow 1. Fasten and adjust seat belt. 2. Start tractor. See page 84 for start-up procedures. 3. Drive to beginning of planned plow path. See page 85 for driving procedures.

  • Page 119: Operate Reel Winder

    RT120Q Operator’s Manual Reel Carrier - 118 Operate Reel Winder Operate Reel Winder Read operator’s manual. Follow safety rules and know how to use all controls. Your safety is at stake. 273-475 1. Lower plow attachment. 2. Turn ignition switch to STOP.

  • Page 120: Backhoe

    RT120Q Operator’s Manual Backhoe - 119 Backhoe Chapter Contents Set Up........120 •...

  • Page 121: Set Up

    RT120Q Operator’s Manual Backhoe - 120 Set Up Set Up EMERGENCY SHUTDOWN - Turn ignition switch to STOP. Crushing weight could cause death or serious injury. Stay away. To help avoid injury: Use attachments or counterweights to make front and rear loads balance when all ®...

  • Page 122: Prepare Backhoe

    RT120Q Operator’s Manual Backhoe - 121 Set Up Prepare Backhoe 1. Disengage seat lock (shown) and rotate seat out of stowed position. Backhoe_Seat_32016.eps 2. Remove swing lock pin from hole (1) and store in hole (2). 3. Raise boom to release tension on stow lock.

  • Page 123: Operate

    RT120Q Operator’s Manual Backhoe - 122 Operate Operate Breathing crystalline silica dust may cause lung disease. Cutting, drilling, or working materials such as concrete, sand, or rock containing quartz may result in exposure to silica dust. Use dust control methods or appropriate breathing protection when exposed to silica dust.

  • Page 124: Move Unit

    RT120Q Operator’s Manual Backhoe - 123 Operate 5. Use boom/swing control and bucket/ dipper control to dig hole or trench. For more information about backhoe controls, see “Backhoe Console” on page 63. • Keep dipper and boom at right angles as much as possible for maximum power.

  • Page 125: Finish Job

    RT120Q Operator’s Manual Backhoe - 124 Finish Job Finish Job 1. Raise stabilizers fully to engage latch. 2. Return remote throttle to low. 3. Lift boom while keeping dipper pointed at ground (shown). 4. Curl bucket closed and move dipper fully toward boom (shown).
  • Page 126 RT120Q Operator’s Manual Backhoe - 125 Finish Job 8. Rotate seat into stowed position and engage seat lock (shown). 9. Drive a short distance away from work site. See page 85 for driving procedures. 10. Shut down tractor. See page 87 for proper shutdown procedures.
  • Page 127 RT120Q Operator’s Manual Backhoe - 126 Finish Job...

  • Page 128: Drill

    RT120Q Operator’s Manual Drill - 127 Drill Chapter Contents Set Up........128 •...

  • Page 129: Set Up

    RT120Q Operator’s Manual Drill - 128 Set Up Set Up EMERGENCY SHUTDOWN - Turn ignition switch to STOP. Jobsite hazards could cause death or serious injury. Use correct equipment and work methods. Use and maintain proper safety equipment. To help avoid injury: •...

  • Page 130: Dig Target Trench

    RT120Q Operator’s Manual Drill - 129 Set Up Dig Target Trench 1. Select a completion point for the bore. 2. Dig a target trench (2) across the intended completion point. IMPORTANT: Ensure that target trench is: • deep enough for drill bit to enter slightly above the trench floor, and •...

  • Page 131: Operate

    RT120Q Operator’s Manual Drill - 130 Operate Operate Breathing crystalline silica dust may cause lung disease. Cutting, drilling, or working materials such as concrete, sand, or rock containing quartz may result in exposure to silica dust. Use dust control methods or appropriate breathing protection when exposed to silica dust.

  • Page 132: Drill

    RT120Q Operator’s Manual Drill - 131 Operate Drill Rotating shaft will cause death or serious injury. Stay away. To help avoid injury: • Keep everyone at least 10’ (3 m) away from drill string and machine. • Wear close-fitting clothing and personal protective equipment.

  • Page 133: Start Bore With Drill String Guide

    RT120Q Operator’s Manual Drill - 132 Operate Start Bore with Drill String Guide If necessary, have helper follow the instructions below to operate the drill string guide at start of bore. Rotating shaft will cause death or serious injury. Stay away.

  • Page 134: Add Rod

    RT120Q Operator’s Manual Drill - 133 Operate Add Rod If more length is needed, ask a helper to add a rod section. Rotating shaft will cause death or serious injury. Stay away. To help avoid injury: Only access drilling attachment with hands when engine is shut down.

  • Page 135: Backream

    RT120Q Operator’s Manual Drill - 134 Operate Backream After drill bit enters target trench, the bore hole may be enlarged by changing the drill bit to a reamer and pulling it back through the initial bore. NOTICE: Incorrect use may damage components and increase wear.

  • Page 136: Install Product

    RT120Q Operator’s Manual Drill - 135 Operate Install Product To install product, pull it through the bore after drilling or final pass of backreaming. Rotating shaft will cause death or serious injury. Stay away. To help avoid injury: Ensure no one is in target trench or near product being installed.

  • Page 137: Remove Rod

    RT120Q Operator’s Manual Drill - 136 Operate Remove Rod If the length of rod outside the bore reaches 30’ (9 m), ask a helper to remove rod sections as needed. Rotating shaft will cause death or serious injury. Stay away.
  • Page 138 RT120Q Operator’s Manual Drill - 137 Operate Reconnect Drill String 1. Start tractor and set engine to low throttle. 2. Slowly move machine forward until attached rod section and drill string are about 1’ (30 cm) apart. 3. Have helper lightly hold attached rod section and drill string so that they are aligned.

  • Page 139: Finish Job

    RT120Q Operator’s Manual Drill - 138 Finish Job Finish Job Disassemble Drill String 1. Shut down tractor. 2. Disconnect drill string from drilling attachment. 3. Remove drill bit. 4. Disconnect sections: • Press tab through hole in female side of joint (1) using special tool (p/n 351-272).

  • Page 140: Saw

    RT120Q Operator’s Manual Saw - 139 Chapter Contents Set Up........140 Operate .
  • Page 141 RT120Q Operator’s Manual Saw - 140 Set Up Set Up EMERGENCY SHUTDOWN - Turn ignition switch to STOP. Crushing weight could cause death or serious injury. Stay away. To help avoid injury: Use attachments or counterweights to make front and rear loads balance when all ®...
  • Page 142 RT120Q Operator’s Manual Saw - 141 Operate Operate Breathing crystalline silica dust may cause lung disease. Cutting, drilling, or working materials such as concrete, sand, or rock containing quartz may result in exposure to silica dust. Use dust control methods or appropriate breathing protection when exposed to silica dust.
  • Page 143 RT120Q Operator’s Manual Saw - 142 Operate 4. Move attachment speed/direction control to desired speed. SAW WILL TURN. Moving digging teeth will cause serious injury or death. Stay away. To help avoid injury: • Allow 3’ (1 m) between digging teeth and obstacle. Machine may jerk when digging starts.
  • Page 144 RT120Q Operator’s Manual Saw - 143 Finish Job Finish Job 1. When trench is complete, move ground drive hand control to neutral. 2. Adjust throttle to low. 3. Raise saw and stabilizers. 4. As saw clears top of trench, move attachment speed/direction control to neutral.
  • Page 145 RT120Q Operator’s Manual Saw - 144 Finish Job...

  • Page 146: Systems And Equipment

    RT120Q Tractor ........

  • Page 147: Cruise Control

    RT120Q Operator’s Manual Systems and Equipment - 146 Cruise Control Cruise Control Cruise control is a standard feature that allows the unit to automatically adjust ground drive speed according to digging conditions. In easier soil conditions, the ground drive speed will increase. When the unit encounters difficult soil conditions, the ground drive speed will decrease.
  • Page 148 RT120Q Operator’s Manual Systems and Equipment - 147 Cruise Control Trenching 1. First set the following controls: • ground drive controls to neutral • ground drive switch to low • ensure cruise control is off • all other controls set as desired 2.

  • Page 149: Chain, Teeth, And Sprockets

    RT120Q Operator’s Manual Systems and Equipment - 148 Chain, Teeth, and Sprockets Chain, Teeth, and Sprockets Chain and Tooth Maintenance • Always replace sprockets at the same time you replace the digging chain. Sprockets and chain are designed to work together. Replacing one without the other will cause premature wear of the new part.

  • Page 150: Chain Selection

    RT120Q Operator’s Manual Systems and Equipment - 149 Chain, Teeth, and Sprockets Chain Selection These charts are meant as a guideline only. No one chain type works well in all conditions. See your Ditch Witch dealer for soil conditions and chain recommendations for your area. Ask for the latest Chain, Teeth, and Sprockets Parts Catalog.

  • Page 151: Optional Equipment

    RT120Q Operator’s Manual Systems and Equipment - 150 Optional Equipment Optional Equipment ® See your Ditch Witch dealer for more information about the following optional equipment. RT120Q Tractor Equipment Description backup alarm alarm sounds when tractor is in reverse light kit...

  • Page 152: Complete The Job

    RT120Q Operator’s Manual Complete the Job - 151 Complete the Job Chapter Contents Restore Jobsite ......152 •...
  • Page 153 RT120Q Operator’s Manual Complete the Job - 152 Restore Jobsite Restore Jobsite After product is installed, return spoils to the trench with optional backfill blade. Backfilling 1. Position unit at end of trench, several feet from spoils. Aim tractor at outer edge of spoils.

  • Page 154: Service

    RT120Q Operator’s Manual Service - 153 Service Chapter Contents Service Precautions ..... . . 154 • Welding Precaution ........154 •...

  • Page 155: Service Precautions

    NOTICE: Water can damage electronics. When cleaning equipment, do not spray electrical components with water. Changing Attachments The RT120Q is programmed to operate with the original attachment configuration. If you change ® attachments, contact your Ditch Witch dealer to ensure the electronic programming is updated. If you...

  • Page 156: Recommended Lubricants/Service Key

    RT120Q Operator’s Manual Service - 155 Recommended Lubricants/Service Key Recommended Lubricants/Service Key Item Description Tier 4i Diesel engine oil meeting or exceeding Deutz specification DQC III- LA. NOTICE: Shipped from factory with API CJ-4 DEO meeting Deutz specification DQC II- LA.

  • Page 157: Tier 4I Engine

    RT120Q Operator’s Manual Service - 156 Recommended Lubricants/Service Key ® Proper lubrication and maintenance protects Ditch Witch equipment from damage and failure. Service intervals listed are for minimum requirements. In extreme conditions, service machine more frequently. Use only recommended lubricants. Fill to capacities listed in “Fluid Capacities” on page 196.

  • Page 158: Approved Fuel

    RT120Q Operator’s Manual Service - 157 Recommended Lubricants/Service Key Approved Fuel Tier 4i Engine (U.S., Canada, EU, and Japan) Avoid static electricity when fueling. Ultra Low Sulfur Diesel (ULSD) poses a greater static ignition hazard than earlier diesel formulations. Avoid death or serious injury from fire or explosion.

  • Page 159: Approved Coolant

    RT120Q Operator’s Manual Service - 158 Recommended Lubricants/Service Key Approved Coolant ® Beginning March 14, 2016, this unit was filled with red coolant meeting Deutz DQC CB-14 before shipment from factory. Add or replace only with coolant meeting this specification. This coolant is available, ®...

  • Page 160: 10 Hour

    RT120Q Operator’s Manual Service - 159 10 Hour 10 Hour Location Task Notes TRACTOR Check engine oil level Check air filter indicator Clean dust ejector valve Check hydraulic fluid level Check hydraulic hoses Check coolant level DEAC Check radiator fins...
  • Page 161 RT120Q Operator’s Manual Service - 160 10 Hour Tractor Check Engine Oil Level Check engine oil at dipstick (1) before operation and every 10 hours thereafter. Add DEO at fill (2) as necessary to keep oil level at highest line on dipstick.
  • Page 162 RT120Q Operator’s Manual Service - 161 10 Hour Clean Dust Ejector Valve Check dust ejector valve (shown) every 10 hours of operation. Ensure that valve is not inverted, damaged, plugged, or cracked. t37om016w.eps Check Hydraulic Fluid Level With frame level, check fluid at sight glass every 10 hours.
  • Page 163 RT120Q Operator’s Manual Service - 162 10 Hour Check Hydraulic Hoses Pressurized fluid or air could pierce skin and cause severe injury. Refer to operator’s manual for proper use. 270-6035 To help avoid injury: • Before disconnecting a hydraulic line, turn engine off and operate all controls to relieve pressure.
  • Page 164 RT120Q Operator’s Manual Service - 163 10 Hour Check Radiator Fins Check radiator for dirt, grass, and other foreign matter every 10 hours. Clean out with compressed air or spray wash if required. Be careful not to damage fins with high pressure air or water. Check more often if operating in dusty or grassy conditions.
  • Page 165 RT120Q Operator’s Manual Service - 164 10 Hour Lube Trencher Pivot Wipe five zerks located on right of trencher pivot clean and lube every 10 hours with EPG. Wipe four zerks located on left of trencher pivot clean and lube every 10 hours with EPG.
  • Page 166 RT120Q Operator’s Manual Service - 165 10 Hour Lube Trencher Auger Shaft Lube four auger shaft zerks (two on each side) every 10 hours with EPG. Check Trencher Auger Bolts Check trencher auger bolts every 10 hours. For optimal spoils delivery, adjust augers to match terrain and digging depth.
  • Page 167 RT120Q Operator’s Manual Service - 166 10 Hour Check Boom Mounting Bolts Check 14 bolts (7 on each side) every 10 hours and tighten as necessary to keep bolts and other fasteners tight. Check for looseness or wear. Check that bolts are tightened to 250 ft•lb (28 N•m).
  • Page 168 RT120Q Operator’s Manual Service - 167 10 Hour Check Trench Cleaner Position Check trench cleaner position (if equipped) every 10 hours, or anytime the digging chain is adjusted or replaced. The trench cleaner is properly positioned when there is 3-4 in (76-102 mm) between the digging teeth and the inside of the trench cleaner shoe (A).
  • Page 169 RT120Q Operator’s Manual Service - 168 10 Hour Check Digging Chain Tension Pressurized fluid or air could pierce skin and cause severe injury. Refer to operator’s manual for proper use. 270-6035 To help avoid injury: Service digging boom grease cylinder only while standing on opposite side of boom.
  • Page 170 RT120Q Operator’s Manual Service - 169 10 Hour Check Plow Vibrator Oil Level Hot parts may cause burns. Do not touch until cool or wear gloves. Check plow vibrator oil on each side of vibrator every 10 hours. With vibrator horizontal, oil should be halfway up sight glass (2).
  • Page 171 RT120Q Operator’s Manual Service - 170 10 Hour Check Attachment Mounting Bolts Check mounting bolts every 10 hours and tighten as necessary to keep bolts and other fasteners tight. Check for looseness or wear. Apply Loctite ® adhesive. Check that bolts are tightened to...

  • Page 172: 50 Hour

    RT120Q Operator’s Manual Service - 171 50 Hour 50 Hour Location Task Notes TRACTOR Check drive belt Lube track pivot bearings TRENCHER Check trencher gearbox oil level PLOW Change plow vibrator oil (initial) Tractor Check Drive Belt Check belt every 50 hours for damage or wear.
  • Page 173 RT120Q Operator’s Manual Service - 172 50 Hour Trencher Check Trencher Gearbox Oil Level Check oil at sight tube every 50 hours. Keep oil level at horizontal line on housing. If necessary, add MPL at fill plug. Plow Change Plow Vibrator Oil Hot parts may cause burns.

  • Page 174: 100 Hour

    RT120Q Operator’s Manual Service - 173 100 HOUR 100 HOUR Location Task Notes TRACTOR Change engine oil (Tier 3) Initial; if using fuel with sulfur content above 500 ppm (500 mg/kg) Check track tension Inspect track rollers and sprocket PLOW...
  • Page 175 RT120Q Operator’s Manual Service - 174 100 HOUR Check Track Tension Check track tension every 100 hours. To check: 1. Elevate unit on jackstands, or lifting devices capable of holding the weight of the tractor. 2. Measure tension using one of the methods below.
  • Page 176 RT120Q Operator’s Manual Service - 175 100 HOUR Plow Check Shear Mounts Check shear mounts for wear every 100 hours. Replace as needed. IMPORTANT: When replacing shear mounts, it is important to compress the shear mounts with the washers to prevent the shear mount from tearing.

  • Page 177: 250 Hour

    RT120Q Operator’s Manual Service - 176 250 Hour 250 Hour Location Task Notes TRACTOR Engine oil and filter change Lube driveshaft U-joints Lube axle spindle pins Check ground drive gearbox oil level Check differential oil level Lube planetary wheel ends...
  • Page 178 RT120Q Operator’s Manual Service - 177 250 Hour Lube Driveshaft U-joints Lube driveshaft U-joints every 250 hours with 3-4 shots of EPG. t37om025w.eps Lube Axle Spindle Pins Lube axle spindle pins every 250 hours with 3-4 shots of EPG. t37om026w.eps Check Ground Drive Gearbox Oil Level Check oil level at fill (shown) every 250 hours.
  • Page 179 RT120Q Operator’s Manual Service - 178 250 Hour Check Differential Oil Level Check oil level at fill (shown) every 250 hours. Add MPL as needed. t37om028w.eps Level Check Planetary Wheel End Oil Remove track to check oil level in planetary wheel ends every 250 hours.

  • Page 180: Hour

    RT120Q Operator’s Manual Service - 179 500 Hour 500 Hour Location Task Notes TRACTOR Change engine oil and filter ONLY if using motor oil meeting Deutz specifications DQCIII-LA (Tier 4i) or DQCIII (Tier 3). Change fuel filters Change hydraulic fluid and filter...
  • Page 181 RT120Q Operator’s Manual Service - 180 500 Hour Change Hydraulic Fluid and Filter Change hydraulic fluid and filter every 500 hours. Change hydraulic fluid and filter every 250 hours if jobsite temperature exceeds 100°F (38°C) more than 50% of the time.
  • Page 182 RT120Q Operator’s Manual Service - 181 500 Hour Trencher Adjust Headshaft Bearing Adjust headshaft bearing every 500 hours. To adjust: 1. Remove cover. Remove bolts attaching trenching attachment motor to gearbox. 2. Remove bolt and washers in left end of headshaft.

  • Page 183: 1000 Hour

    RT120Q Operator’s Manual Service - 182 1000 Hour 1000 Hour Location Task Notes TRACTOR Change differential oil Change ground drive gearbox oil Change planetary wheel end oil TRENCHER Change trencher gearbox oil Tractor Change Differential Oil Change differential oil every 1000 hours.
  • Page 184 RT120Q Operator’s Manual Service - 183 1000 Hour Change Planetary Wheel End Oil Change wheel end oil every 1000 hours. To change: 1. Position wheel with plug at bottom. 2. Remove plug. 3. Drain oil. 4. Reposition wheel with plug at midway position.

  • Page 185: 2000 Hour

    RT120Q Operator’s Manual Service - 184 2000 Hour 2000 Hour Location Task Notes TRACTOR Change engine coolant DEAC Check seatbelt and seatbelt mounting hardware Tractor Change Engine Coolant NOTICE: • The use of non-approved coolant may lead to engine damage or premature engine failure and will void engine warranty.
  • Page 186 RT120Q Operator’s Manual Service - 185 2000 Hour Inspect Seat Belt Check seat belt and mounting hardware as needed. Inspect the webbing, buckle and latch, retractor, and mounting hardware. Buckle and Latch Check that the buckle and latch (1) are not broken or corroded.

  • Page 187: As Needed

    RT120Q Operator’s Manual Service - 186 As Needed As Needed Location Task Notes TRACTOR Adjust parking brake Clean radiator fins Check engine compartment Drain water separators and fuel filter As indicated on dash display TRENCHER Replace digging chain PLOW Clean feed tube...
  • Page 188 RT120Q Operator’s Manual Service - 187 As Needed Clean Radiator Fins Clean out radiator fins with compressed air or spray wash if required. Be careful not to damage fins with high-pressure air or water. Check more often if operating in dusty or grassy conditions.
  • Page 189 RT120Q Operator’s Manual Service - 188 As Needed Trencher Replace Digging Chain Visually check digging chains for wear on teeth (1), rollers, and sidebars (2). Check pins (3) and bushing wear by measuring distance between chain pins and comparing it with a new chain.
  • Page 190 RT120Q Operator’s Manual Service - 189 As Needed 8. Loop cable through links nearest connector pin. Hot parts may cause burns. Do not touch until cool or wear gloves. To help avoid injury: Service digging boom grease cylinder only while standing on opposite side of boom.
  • Page 191 RT120Q Operator’s Manual Service - 190 As Needed 13. Use hoist to pull front end of chain over head shaft sprocket. 14. Move chain down boom until chain connector pin and lock key can be installed. Install connector pin and lock key.
  • Page 192 RT120Q Operator’s Manual Service - 191 As Needed Replace Sod Cutter and Blade Replace worn sod cutter and plow blade as needed. Check Plow Blade Bolts Check plow blade bolts as needed. If loose, use Loctite® 242 (blue) and tighten bolts to 210 ft•lb (285 N•m).
  • Page 193 RT120Q Operator’s Manual Service - 192 As Needed...

  • Page 194: Specifications

    4.22 m Wheelbase 79 in 2.01 m Width 89 in 2.26 m Tread 71 in 1.80 m General ® Ditch Witch model RT120Q tractor, 4-wheel drive, rigid frame, hydrostatic ground drive through rubber tracks, 4-wheel steering, hydrostatic attachment drive, riding unit.
  • Page 195 RT120Q Operator’s Manual Specifications - 194 RT120Q Tractor Operation U.S. Metric Forward speeds 2.0 mph 3.2 km/h Medium 4.4 mph 7.1 km/h High 7.2 mph 11.6 km/h Reverse speeds 2.0 mph 3.2 km/h Medium 4.4 mph 7.1 km/h High 4.7 mph 7.5 km/h...
  • Page 196 RT120Q Operator’s Manual Specifications - 195 RT120Q Tractor Power Plant U.S. Metric Engine: Deutz Tier 3 or Tier 4i TCD 3.6 L4 diesel, liquid cooled, 4 cyl, common rail direct injection, turbocharged with charge air cooling, and Tier 4i with exhaust after treatment system (EAT).
  • Page 197 RT120Q Operator’s Manual Specifications - 196 RT120Q Tractor Fluid Capacities U.S. Metric Fuel tank 38 gal 144 L Engine oil 8.4 qt Hydraulic reservoir 20 gal 76 L Hydraulic system 25 gal 95 L Cooling system 17 qt 16.1 L Battery (2 used) Group 65, SAE res.
  • Page 198 RT120Q Operator’s Manual Specifications - 197 H910 Trencher H910 Trencher Dimensions U.S. Metric Angle of departure 30° 30° Trench depth, maximum 93 in 2.36 m Trench width, maximum 24 in 610 mm Boom travel down 65° 65° Boom travel up 50°...
  • Page 199 RT120Q Operator’s Manual Specifications - 198 H910 Trencher Operation U.S. Metric Headshaft speeds with RT120Q at 2300 engine rpm Ratio low 152 rpm 152 rpm Ratio standard 203 rpm 203 rpm Ratio high (not recommended) 247 rpm 247 rpm Digging chain speeds with RT120Q...
  • Page 200 RT120Q Operator’s Manual Specifications - 199 H911 Trencher H911 Trencher Dimensions U.S. Metric Angle of departure 27° 27° Trench depth, maximum 90 in 2.29 m Trench width, maximum 24 in 610 mm Boom travel down 65° 65° Boom travel up 50°...
  • Page 201 RT120Q Operator’s Manual Specifications - 200 H911 Trencher Operation U.S. Metric Headshaft speeds with RT120Q at 2300 engine rpm Ratio low 152 rpm 152 rpm Ratio standard 203 rpm 203 rpm Ratio high (not recommended) 247 rpm 247 rpm Digging chain speeds with RT120Q...
  • Page 202 RT120Q Operator’s Manual Specifications - 201 H1032 Plow H1032 Plow Dimensions U.S. Metric Cover depth* 36 in 915 mm A’ Penetration* 40 in 1.02 m A3’ Angle of departure, transport, no blade 47.5° 47.5° Angle of departure, transport, 24” (610-mm) blade 30°...
  • Page 203 RT120Q Operator’s Manual Specifications - 202 H1032 Plow Center of plow to outside edge of machine, right 45.5 in 1.16 m *Suggested maximum. Plow blade used will be determined by job requirements and soil conditions Operation U.S. Metric Plow vibrator force @ 1800 rpm...
  • Page 204 RT120Q Operator’s Manual Specifications - 203 H1052 Combo H1052 Combo Trencher Dimensions U.S. Metric Trench depth, maximum 70 in 1.78 m Angle of departure 26° 26° Trench width 6-12 in 150-300 mm Boom travel up 44° 44° Boom travel down 60°...
  • Page 205 RT120Q Operator’s Manual Specifications - 204 H1052 Combo Headshaft overhang 48 in 1.22 m *Left edge of machine is defined as outside of digging chain guard Operation U.S. Metric Maximum headshaft speed at 2300 engine rpm Ratio low 229 rpm...
  • Page 206 RT120Q Operator’s Manual Specifications - 205 H1052 Combo Plow Dimensions U.S. Metric Cover depth* 36 in 915 mm A’ Penetration* 40 in 1.02 m Angle of departure, transport, 24” (610-mm) blade 30° 30° Angle of departure, transport, 30” (760-mm) blade 24°...
  • Page 207 RT120Q Operator’s Manual Specifications - 206 H1052 Combo Center of plow to outside edge of machine, right 48 in 1.22 mm * Suggested maximum. Plow blade used will be determined by job requirements and soil conditions. Operational U.S. Metric Plow vibrator force @ 1800 rpm...
  • Page 208 RT120Q Operator’s Manual Specifications - 207 A920 Backhoe A920 Backhoe Dimensions U.S. Metric Transport height 122 in 3.10 m Ground clearance 33 in 838 mm Backhoe length, stowed 117 in 2.97 m Digging depth, max. 108 in 2.74 m Digging depth, 2” (0.6 m) flat bottom 105 in 2.67 m...
  • Page 209 RT120Q Operator’s Manual Specifications - 208 A920 Backhoe Backhoe or basic unit width 82 in 2.08 m Stabilizer spread, operating 121 in 3.07 m Leveling angle 10° 10° General U.S. Metric Bucket Width 12-24 in 305-610 Capacity 1.7-3.5 ft 0.05-.1 m Backhoe weight with 18”...
  • Page 210 RT120Q Operator’s Manual Specifications - 209 RC120 Reel Carrier RC120 Reel Carrier t37om040w.eps Dimensions U.S. Metric Distance from backfill blade to outside edge of reel carrier with 74 in 1.88 m maximum diameter reel Maximum reel diameter 84 in 2.13 m...
  • Page 211 RT120Q Operator’s Manual Specifications - 210 H1140 Saw H1140 Saw t37om049w.eps Dimensions U.S. Metric Trench depth 40.5 in 1.03 m Trench width 4.5, 6, 8 in 115,150, 203 mm Transport height - attachment 130 in 3.3.m Height - wheel on ground 102 in 2.6 m...
  • Page 212 RT120Q Operator’s Manual Specifications - 211 Declaration of Conformity Information Declaration of Conformity Information Countries in the European Union should have received a Declaration of Conformity (DOC) with this machine similar to the example below. The Charles Machine Works, Inc.
  • Page 213 RT120Q Operator’s Manual Specifications - 212 Declaration of Conformity Information...

  • Page 214: Support

    RT120Q Manual Support - 213 Procedure Support Procedure ® Notify your dealer immediately of any malfunction or failure of Ditch Witch equipment. Always give model, serial number, and approximate date of your equipment purchase. This information should be recorded and placed on file by the owner at the time of purchase.
  • Page 215 RT120Q Operator’s Manual Warranty - 214 Warranty ® Ditch Witch Equipment and Replacement Parts Limited Warranty Policy Subject to the limitation and exclusions herein, free replacement parts will be provided at any authorized Ditch Witch dealership for any Ditch Witch equipment or parts manufactured by the Ditch Witch factory that fail due to a defect in material or workmanship within one (1) year of first commercial use.

  • Page 218: Service Record

    RT120Q Operator’s Manual Service Record - 217 Service Record Service Performed Date Hours...
  • Page 219 RT120Q Operator’s Manual Service Record - 218 Service Performed Date Hours...

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