Ditch Witch 420sx Operator's Manual
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Ditch Witch 420sx Operator's Manual

Ditch Witch 420sx Operator's Manual

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420sx
Operator's
Manual
Issue 3.0
®
CMW
053- 1110

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Summary of Contents for Ditch Witch 420sx

  • Page 1 420sx Operator’s Manual Issue 3.0 ® 053- 1110...

  • Page 2: Table Of Contents

    420sx Operator’s Manual Overview - 1 Overview Chapter Contents Serial Number Location ..... . 2 Intended Use ....... 3 Unit Components .

  • Page 3: Serial Number Location

    Overview - 2 Serial Number Location Serial Number Location Record serial numbers and date of purchase in the spaces provided. Date of manufacture Date of purchase H401 trencher serial number (1) 420sx tractor serial number (2) Engine serial number (3)

  • Page 4: Intended Use

    Intended Use The 420sx is a 41 hp (30 kW), ride-on, articulated vibratory plow designed to install communication, gas, and electrical lines as well as lawn irrigation systems up to 3” (76 mm) in diameter and up to a 24” (610 mm) cover depth.

  • Page 5: Unit Components

    420sx Operator’s Manual Overview - 4 Unit Components Unit Components Tractor 1. Folding Rollover Protective Structure (ROPS) 5. Frame lock 2. Control console 6. Trencher attachment 3. Engine compartment 7. Drilling attachment 4. Articulation joint 8. Plow vibrator...

  • Page 6: Plow

    420sx Operator’s Manual Overview - 5 Unit Components Plow 1. Balance spring assembly 6. Lift trolley 2. Vibrator 7. Lower over-travel bumper 3. Feed tube 8. Sod cutter (optional) 4. Skid shoe 9. Plow blade 5. Upper over-travel bumper...

  • Page 7: Trencher

    420sx Operator’s Manual Overview - 6 Unit Components H401 Trencher 1. Digging chain 3. Restraint bar 2. Trench cleaner (optional) 4. Boom...

  • Page 8: Drill

    420sx Operator’s Manual Overview - 7 Unit Components Drill 1. Coupler 3. U-joint 2. Zerk...

  • Page 9: Reel Carrier

    420sx Operator’s Manual Overview - 8 Unit Components Reel Carrier 1. Front reel carrier 4. Dual reel carrier 2. Front cable guide 5. Rear cable guide 3. ROPS cable guide...

  • Page 10: Operator Orientation

    420sx Operator’s Manual Overview - 9 Operator Orientation Operator Orientation 1. Front of unit 3. Rear of unit 2. Left of unit 4. Right of unit Right and left sides of machine are determined by facing front of unit while seated at the controls.
  • Page 11 420sx Operator’s Manual Overview - 10 About This Manual...

  • Page 12: Foreword

    If you sell your equipment, be sure to give this manual to the new owner. If you need a replacement copy, contact your Ditch Witch dealer. If you need assistance in locating a dealer, visit our website at www.ditchwitch.com or write to the following address: The Charles Machine Works, Inc.
  • Page 13 Copyright 2006, 2007, 2008 by The Charles Machine Works, Inc. , Ditch Witch, CMW, AutoCrowd, Modularmatic, Jet Trac, Roto Witch, Subsite, Fluid Miser, Perma-Soil, Power Pipe, Super Witch, Super Witch II, Pierce Airrow, The Underground, and The Underground Authority Worldwide are registered trademarks of The Charles Machine Works, Inc.
  • Page 14 420sx Operator’s Manual Contents - 13 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 15 420sx Operator’s Manual Contents - 14 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 of wear items, and basic maintenance Specifications machine specifications including weights, measurements, power ratings, and fluid...

  • Page 16: Safety

    420sx Operator’s Manual Safety - 15 Safety Chapter Contents Guidelines ....... . 16 Safety Alert Classifications .

  • Page 17: Guidelines

    Use equipment carefully. Stop operation and investigate anything that does not look or feel right. • Do not operate unit where flammable gas is present. • Contact your Ditch Witch dealer if you have any question about operation, maintenance, or equipment use.

  • Page 18: Safety Alert Classifications

    420sx 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: Safety Alerts

    420sx Operator’s Manual Safety - 18 Safety Alerts Safety Alerts Moving digging teeth will kill you or cut off arm or leg. Stay away. Turning shaft will kill you or crush arm or leg. Stay away. Electric shock. Contacting electric lines will cause death or serious injury.
  • Page 20 420sx Operator’s Manual Safety - 19 Safety Alerts Explosion possible. Serious injury or equipment damage could occur. Follow directions carefully. Incorrect procedures could result in death, injury, or property damage. Learn to use equipment correctly. Fall possible. Riders can fall from machine and be injured or killed. Only operator is allowed on machine.
  • Page 21 420sx Operator’s Manual Safety - 20 Safety Alerts Moving traffic - hazardous situation. Death or serious injury could result. Avoid moving vehicles, wear high visibility clothing, post appropriate warning signs. Hot pressurized cooling system fluid could cause serious burns. Allow to cool before servicing.

  • Page 22: Emergency Procedures

    420sx Operator’s Manual Safety - 21 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 23: If An Electric Line Is Damaged

    420sx Operator’s Manual Safety - 22 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 24: If A Gas Line Is Damaged

    420sx Operator’s Manual Safety - 23 Emergency Procedures If a Gas Line is Damaged Fire or explosion possible. Fumes could ignite and cause burns. No smoking, no flame, no spark. Explosion possible. Serious injury or equipment damage could occur. Follow directions carefully.
  • Page 25 420sx Operator’s Manual Safety - 24 Emergency Procedures...

  • Page 26: Controls

    420sx Operator’s Manual Controls - 25 Controls Chapter Contents Tractor ........26 •...

  • Page 27: Tractor

    420sx Operator’s Manual Controls - 26 Tractor Tractor Gauges and Indicators 1. Engine oil pressure indicator 7. Ground drive neutral indicator 2. Engine oil temperature indicator 8. Lift trolley alignment marks 3. Hydraulic fluid temperature indicator 9. Plow position indicator 4.
  • Page 28 420sx Operator’s Manual Controls - 27 Tractor Item Description Notes 1. Engine oil pressure Lights when oil pressure is If light remains on: indicator too low. Light will come on briefly when engine is started. • Turn off engine. •...
  • Page 29 If the operator presence indicator does not light and the attachment neutral indicator is blinking, the controller has detected an error with the ground drive enable circuit. See your Ditch Witch dealer. 6. Attachment neutral Lights when trench/Roto IMPORTANT: indicator...
  • Page 30 420sx Operator’s Manual Controls - 29 Tractor Item Description Notes 9. Plow position indicator Indicates vertical position of plow during operation. See “Operation” on page 66. 10. Hourmeter Displays engine operating Use engine operating times to time. schedule service. 11. Voltmeter Displays system voltage.

  • Page 31: Controls

    420sx Operator’s Manual Controls - 30 Tractor Controls 1. Electronic Diagnostic Tool (EDT) port 8. Seat slide adjustment 2. Throttle 9. Parking brake 3. Ground drive joystick 10. Horn 4. Cruise control 11. Ignition switch 5. Seat belt 12. Auxiliary power outlet (optional) 6.
  • Page 32 420sx Operator’s Manual Controls - 31 Tractor Item Description Notes 1. Electronic Diagnostic To retrieve diagnostic trouble IMPORTANT: Contact your Ditch Tool (EDT) port codes, connect EDT to this Witch dealer for diagnostic services. port. 2. Throttle To increase engine speed, push up.
  • Page 33 420sx Operator’s Manual Controls - 32 Tractor Item Description Notes 4. Cruise control To set cruise speed: IMPORTANT: • Adjust both controls fully • The control toward the front is counter clockwise. forward. • Move joystick fully in • The control toward the rear is direction of travel.
  • Page 34 420sx Operator’s Manual Controls - 33 Tractor Item Description Notes 7. Frame lock To lock articulation joint, NOTICE: Always lock articulation joint move lever to the lock when transporting the tractor on a position and secure with trailer, or lifting the tractor for service keeper pin.
  • Page 35 420sx Operator’s Manual Controls - 34 Tractor Item Description Notes 11. 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 counter met, return switch to STOP, and try clockwise.

  • Page 36: Attachment

    420sx Operator’s Manual Controls - 35 Attachment Controls Attachment Controls 1. Plow lift control 5. Drill direction/chain reverse switch (optional) 2. Boom lift control 6. Attachment two-speed switch 3. Plow vibrator switch 7. Work light switch (optional) 4. Trench/Roto Witch mode select switch...
  • Page 37 420sx Operator’s Manual Controls - 36 Attachment Controls Item Description Notes 1. Plow lift control To lower, push. To raise, pull. 2. Boom lift control To lower, push. To raise, pull. 3. Plow vibrator switch To start, set switch to the on IMPORTANT: Switch must be in the position.
  • Page 38 420sx Operator’s Manual Controls - 37 Attachment Controls Item Description Notes 5. Drill direction/chain In Roto Witch mode: IMPORTANT: Switch must be in the reverse switch center position in order to start (optional) To rotate drill string clockwise, engine. push and hold switch in the clockwise rotation position.
  • Page 39 420sx Operator’s Manual Controls - 38 Attachment Controls...

  • Page 40: Operation Overview

    420sx Operator’s Manual Operation Overview - 39 Operation Overview Chapter Contents Planning........40 Plowing .
  • Page 41 420sx Operator’s Manual Operation Overview - 40 Planning Planning 1. Gather information about jobsite. See page 44. 2. Inspect jobsite. See page 45. 3. Classify jobsite. See page 46. 4. Select plow blade for your installation. See page 87 5. Select chain and teeth to match your soil type, if necessary. See page 89.
  • Page 42 420sx Operator’s Manual Operation Overview - 41 Drilling Drilling 1. Start unit. See page 50. 2. Dig approach trench and target trench. See page 79. 3. Assemble drill string and position tractor. See page 79. 4. Begin drilling. See page 80.
  • Page 43 420sx Operator’s Manual Operation Overview - 42 Leaving Jobsite...

  • Page 44: Prepare

    420sx Operator’s Manual Prepare - 43 Prepare Chapter Contents Gather Information ......44 • Review Job Plan ......... . .44 •...

  • Page 45: Gather Information

    420sx Operator’s Manual Prepare - 44 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 46: Inspect Site

    420sx Operator’s Manual Prepare - 45 Inspect Site Inspect Site Inspect jobsite before transporting equipment. Check for the following: • changes in elevation such as hills or other open trenches • obstacles such as buildings, railroad crossings, or streams •...

  • Page 47: Classify Jobsite

    420sx Operator’s Manual Prepare - 46 Classify Jobsite Classify Jobsite Inspect Jobsite • Follow U.S. Department of Labor regulations on excavating and trenching (Part 1926, Subpart P) and other similar regulations. • Contact One-Call (811) and any utility companies which do not subscribe to One-Call.

  • Page 48: Apply Precautions

    420sx Operator’s Manual Prepare - 47 Classify Jobsite Apply Precautions Once classified, precautions appropriate for jobsite must be taken. Electric Jobsite Precautions Electric shock. Contacting electric lines will cause death or serious injury. Know location of lines and stay away.

  • Page 49: Check Supplies And Prepare Equipment

    420sx Operator’s Manual Prepare - 48 Check Supplies and Prepare Equipment Check Supplies and Prepare Equipment Supplies • fuel • keys • personal protective equipment, such as hard hat and safety glasses Fluid Levels • fuel • hydraulic fluid •...

  • Page 50: Drive

    420sx Operator’s Manual Drive - 49 Drive Chapter Contents Start Unit ....... . . 50 Drive .
  • Page 51 NOTICE: • Read operator’s manual before operating equipment. Follow instructions carefully. Contact your Ditch Witch dealer for operation information or demonstration. • Wear hard hat, safety glasses, and other protective equipment required by job. Do not wear jewelry or loose clothing that can catch on controls.
  • Page 52 420sx Operator’s Manual Drive - 51 Start Unit 1. Ensure that ROPS is in the upright position. 2. Fasten and adjust seat belt. 3. Move all controls and rocker switches to the neutral or disengaged position. 4. Check that plow vibrator switch and trench/Roto Witch switch is in the off position.
  • Page 53 420sx Operator’s Manual Drive - 52 Drive Drive EMERGENCY SHUTDOWN: Turn ignition switch to STOP. 1. Turn on lights as needed. 2. Raise attachments. 3. Release parking brake. 4. Adjust throttle. 5. Move ground drive joystick in desired direction of travel. For information about the ground drive joystick, see page 31.

  • Page 54: Transport

    420sx Operator’s Manual Transport - 53 Transport Chapter Contents Lift ........54 •...

  • Page 55: Lift

    420sx Operator’s Manual Transport - 54 Lift Lift Crushing weight. If load falls or moves it could kill or crush you. Use proper procedures and equipment or stay away. Incorrect procedures could result in death, injury, or property damage. Learn to use equipment correctly.

  • Page 56: Procedure

    420sx Operator’s Manual Transport - 55 Lift Procedure Tractor Use a crane capable of supporting the equipment's size and weight. See “Specifications” on page 129. • Engage frame lock. See page 33. • Use indicated lift points. • Do not attempt to lift tractor with...
  • Page 57 420sx Operator’s Manual Transport - 56 Lift H401 Trencher Use crane capable of supporting the equipment's size and weight. See page 129 or measure and weigh equipment before lifting. NOTICE: Do not lift tractor with attachments installed. Reel Carrier Use crane capable of supporting the equipment's size and weight.

  • Page 58: Haul

    420sx Operator’s Manual Transport - 57 Haul Haul Inspect Trailer 1. Check hitch for wear and cracks. Lubricate if needed. 2. Check u-bolts and axles for wear. Replace if needed. 3. Check fasteners for wear and tightness. Replace or tighten if needed.
  • Page 59 420sx Operator’s Manual Transport - 58 Haul Load Crushing weight. If load falls or moves it could kill or crush you. Use proper procedures and equipment or stay away. NOTICE: • Attach trailer to tow vehicle before loading or unloading.
  • Page 60 420sx Operator’s Manual Transport - 59 Haul Unload Crushing weight. If load falls or moves it could kill or crush you. Use proper procedures and equipment or stay away. NOTICE: • Attach trailer to tow vehicle before loading or unloading.

  • Page 61: Tie Down

    420sx Operator’s Manual Transport - 60 Tie Down Tie Down Incorrect procedures could result in death, injury, or property damage. Learn to use equipment correctly. Points Tie-down points are identified by tie-down decals. Securing to trailer at other points is unsafe and can damage machinery.

  • Page 62: Tow

    420sx Operator’s Manual Transport - 61 Incorrect procedures could result in death, injury, or property damage. Learn to use equipment correctly. Under normal conditions, tractor should not be towed. If tractor becomes disabled and towing is necessary: • Open hydrostat bypass valve (shown).
  • Page 63 420sx Operator’s Manual Transport - 62...

  • Page 64: Plow

    420sx Operator’s Manual Plow - 63 Plow Chapter Contents Setup ........64 •...

  • Page 65: Setup

    NOTICE: • Use attachments or counterweights to make front and rear loads balance when all attachments are raised. See “Counterweights” on page 85 or contact your Ditch Witch dealer about counterweighting for your equipment. • Choose the correct plow blade length for the desired depth of material cover. If using a vertically adjustable, multi-depth blade, select the proper installation height.

  • Page 66: Position Tractor

    420sx Operator’s Manual Plow - 65 Setup Position Tractor 1. Fasten and adjust seat belt. 2. Start tractor. See page 50 for start-up procedures. 3. Drive to starting point. Move in line with planned path. See page 52 for operating procedures.

  • Page 67: Operation

    420sx Operator’s Manual Plow - 66 Operation Operation Crushing weight could cause death or serious injury. Use proper procedures and equipment or stay away. Electrical shock. Contacting electrical lines will cause death or serious injury. Know location of lines and stay away.
  • Page 68 IMPORTANT: • To take full advantage of the 420sx ground following capability, use the plow lift control to keep the plow position indicator in operating range. (See “Plow position indicator” on page 29.)
  • Page 69 420sx Operator’s Manual Plow - 68 Operation 11. When installation is complete, move ground drive control to the neutral position. 12. Engage parking brake. 13. Ensure that attachment speed switch is in the LOW position. 14. With vibrator running, lower throttle speed and raise plow to just below ground level.

  • Page 70: Operating Tips

    420sx Operator’s Manual Plow - 69 Operating Tips Operating Tips • Choose the correct plow blade for the type of material being installed. Consider bend radius and diameter of material being installed as well as depth of installation. • If material must be at a constant depth, dig starting and target trenches.
  • Page 71 420sx Operator’s Manual Plow - 70 Operating Tips...

  • Page 72: Trench

    420sx Operator’s Manual Trench - 71 Trench Chapter Contents Setup ........72 Operation .
  • Page 73 NOTICE: Use attachments or counterweights to make front and rear loads balance when all attachments are raised. Contact your Ditch Witch dealer about counterweights for your equipment. Jobsite hazards could cause death or serious injury. Use correct equipment and work methods.
  • Page 74 420sx Operator’s Manual Trench - 73 Operation Operation Jobsite hazards could cause death or serious injury. Use correct equipment and work methods. Use and maintain proper safety equipment. NOTICE: Cutting or drilling concrete containing sand or rock containing quartz may result in exposure to silica dust.
  • Page 75 420sx Operator’s Manual Trench - 74 Operation 1. If necessary, adjust throttle to low idle. 2. Move the trench/Roto Witch switch to the TRENCH position. DIGGING CHAIN WILL MOVE. 3. Increase engine speed to full throttle. 4. Slowly lower digging boom to depth.
  • Page 76 Operating Tips Operating Tips • Operate engine at full throttle when digging conditions permit. • Use correct length boom. See your Ditch Witch dealer for more information. • Do not make sharp turns. Lower boom to full depth when turning.
  • Page 77 420sx Operator’s Manual Trench - 76 Operating Tips...

  • Page 78: Drill

    420sx Operator’s Manual Drill - 77 Drill Chapter Contents Prepare Jobsite and Equipment ....79 • Approach Trench......... . .79 •...
  • Page 79 420sx Operator’s Manual Drill - 78 Turning shaft will kill you or crush arm or leg. Stay away. NOTICE: Keep everybody at least 10’ (3 m) away from drill pipe during operation. Do not straddle trench or drill pipe while drilling.

  • Page 80: Prepare Jobsite And Equipment

    420sx Operator’s Manual Drill - 79 Prepare Jobsite and Equipment Prepare Jobsite and Equipment Approach Trench (1) 1. Mark path where you intend to drill. 2. Dig an approach trench (1) along the intended bore path. IMPORTANT: The approach trench should be at least: •...

  • Page 81: Drill

    Use drill string guide to align drill string as it enters the soil. When using drill string guide, follow these guidelines: • Use only approved Ditch Witch drill string guide (p/n 179-737). • Stand only on the left side of the approach trench.

  • Page 82: Add Rod

    420sx Operator’s Manual Drill - 81 Add Rod Add Rod 1. Stop drilling attachment. 2. Back up tractor 6" (150 mm) to loosen drill rod in ground. 3. Disconnect drill rod from drilling attachment. 4. Move tractor away from bore.

  • Page 83: Disassemble Joints

    420sx Operator’s Manual Drill - 82 Disassemble Joints Disassemble Joints 1. Press tab through hole in female side of joint using special tool or screwdriver. 2. Pull rods apart.

  • Page 84: Systems And Equipment

    420sx Tractor ........

  • Page 85: Optional Equipment

    420sx Operator’s Manual Systems and Equipment - 84 Optional Equipment Optional Equipment See your Ditch Witch dealer for more information about the following optional equipment. 420sx Tractor Equipment Description plow blades and Choose the most efficient plow blade for your job based on your desired...

  • Page 86: Counterweights

    420sx Operator’s Manual Systems and Equipment - 85 Counterweights Counterweights Attachments or counterweights are installed to make front and rear loads balance when all attachments are raised. Use the chart below to determine how much counterweight is needed with your machine configuration.

  • Page 87: Roll-Over Protective Structure

    Roll-Over Protective Structure Roll-Over Protective Structure The 420sx is equipped with a foldable roll-over protective structure (ROPS). ROPS are effective in reducing injuries during overturns. For normal operation, keep the ROPS in the upright position and fasten the seat belt.

  • Page 88: Plow Blades

    Use a speed blade only for straight or gently curving installations. Do not use speed blades for installations that require sharp turns. • Use the plow blade most appropriate for the type of material being installed. Contact your Ditch Witch dealer for information about the most effective blade for your jobsite conditions. Blade Types...

  • Page 89: Plow Trolley Mounting

    420sx Operator’s Manual Systems and Equipment - 88 Plow Trolley Mounting Plow Trolley Mounting The plow trolley mounts on the tractor differently for large and small tires. NOTICE: • Operating the plow with the trolley mounted improperly will reduce plow performance and could cause permanent damge to plow attachment.

  • Page 90: Chain, Teeth, And Sprockets

    For correct tightening procedure, see page 108. • Use the tooth pattern most appropriate for your digging conditions. If you move to a different soil type, contact your Ditch Witch dealer for information about the most effective chain type and tooth pattern. Chain Types Chain type...

  • Page 91: Chain Selection

    420sx Operator’s Manual Systems and Equipment - 90 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 92: Complete The Job

    420sx Operator’s Manual Complete the Job - 91 Complete the Job Chapter Contents Restore Jobsite ......92 Rinse Equipment .
  • Page 93 420sx Operator’s Manual Complete the Job - 92 Restore Jobsite Restore Jobsite After product is installed, return spoils to the trench. Rinse Equipment Spray water onto equipment to remove dirt and mud. NOTICE: Do not spray water onto operator’s console. Electrical components could be damaged. Wipe down instead.

  • Page 94: Service

    420sx Operator’s Manual Service - 93 Service Chapter Contents Service Precautions ......94 Lubrication Overview ..... . . 96 Recommended Lubricants/Service Key .

  • Page 95: Service Precautions

    420sx Operator’s Manual Service - 94 Service Precautions Service Precautions Incorrect procedures could result in death, injury, or property damage. Learn to use equipment correctly. NOTICES: • Unless otherwise instructed, all service should be performed with engine off. • Refer to engine manufacturer’s manual for engine maintenance instructions.
  • Page 96 420sx Operator’s Manual Service - 95 Service Precautions Welding Precaution NOTICE: Welding can damage electronics.. • Disconnect negative cable on battery (shown) or move battery disconnect switch to the OFF position (if equipped) before welding to prevent damage to battery. Do not turn off battery disconnect switch with engine running or alternator and other electronic devices may be damaged.

  • Page 97: Lubrication Overview

    420sx Operator’s Manual Service - 96 Lubrication Overview Lubrication Overview...

  • Page 98: Recommended Lubricants/Service Key

    Filter Change, replace, adjust, service, or test 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 See “Specifications” on page 129.

  • Page 99: Engine Oil Selection Chart

    420sx Operator’s Manual Service - 98 Recommended Lubricants/Service Key Engine Oil Selection Chart Select oil based on ambient temperature range expected before next oil change. Incorrect procedures could result in death, injury, or property damage. Learn to use equipment correctly.

  • Page 100: 10 Hour

    420sx Operator’s Manual Service - 99 10 Hour 10 Hour Location Task Notes TRACTOR Check engine oil level Check hydraulic fluid level Check hydraulic fluid cooler Check hydraulic hoses Check tire pressure and lugnuts Check air filter restriction indicator PLOW...
  • Page 101 420sx Operator’s Manual Service - 100 10 Hour Tractor Check Engine Oil Level While engine oil is warm, check oil level at dipstick (1) every 10 hours. Add DEO at fill (2) as necessary to keep oil level at highest line on dipstick.
  • Page 102 420sx Operator’s Manual Service - 101 10 Hour Check Hydraulic Fluid Cooler Check hydraulic fluid cooler for dirt and debris. Clean with compressed air or spray wash as needed. Check Hydraulic Hoses Check all hydraulic hoses every 10 hours. Pressurized fluid or air could pierce skin and cause injury or death. Stay away.
  • Page 103 420sx Operator’s Manual Service - 102 10 Hour Check Tire Pressure and Lugnuts Check tire pressure at stem (2) every 10 hours. Use water-rinsable air gauge if tire ballast sealant fluid is used. Tire option Maximum pressure 26 x 12.00-12 4-ply bar lug 20 psi (1.4 bar)
  • Page 104 420sx Operator’s Manual Service - 103 10 Hour Plow Check Plow Gearbox Oil Level Check plow vibrator oil level every 10 hours. Check when oil is cold, with vibrator level and skid shoes on ground. Remove plow blade and sod cutter if necessary. Oil should be halfway up sight glass (2). Add MPL as needed at fill (1).
  • Page 105 420sx Operator’s Manual Service - 104 10 Hour Check Over-travel Bumpers Check over-travel bumpers for wear or damage every 10 hours. Replace as needed. Check Plow Arm Pins and Bushings Check plow arm pins and bushings every 10 hours. Replace bushings at first sign of wear.
  • Page 106 420sx Operator’s Manual Service - 105 10 Hour Reel Carrier Check Rear Reel Carrier Mounting Bolts Check rear reel carrier mounting bolts every 10 hours. Tighten bolts to 310 ft•lb (420 N•m). Check Rear Reel Carrier Cable Guides Check rear reel carrier cable guides every 10 hours to make sure material does not rub against hydraulic...

  • Page 107: 10 Hour

    420sx Operator’s Manual Service - 106 10 Hour Trencher Lube Trencher Headshaft / Motor Mount Wipe zerk clean and lube every 10 hours with 8-10 pumps of MPG. Lube Trencher Pivot Stub Wipe zerk clean and lube every 10 hours with MPG.
  • Page 108 Check bolts every 10 hours. Tighten to 310 ft•lb (420 N•m). Check Digging Chain Teeth and Bits Check teeth (1) for wear every 10 hours. Replace worn teeth, using Ditch Witch replacement parts and maintaining original tooth pattern. Check chain every 10 hours. Replace worn or broken chains. If sidebars (2) are bent or loose on chain pins (3), chain spacers should be used to join sidebars.
  • Page 109 420sx Operator’s Manual Service - 108 10 Hour Check Digging Chain Tension Check digging chain tension every 10 hours. Roller Boom with Adjusting Screw With boom horizontal, measure distance from bottom of boom to chain (3). When properly adjusted, distance should be 1.5-2” (40-50 mm). Adjust tension by tightening or loosening adjustment screw (1) and jam nut (2).
  • Page 110 420sx Operator’s Manual Service - 109 50 Hour 50 Hour Location Task Notes TRACTOR Lube u-joints Check fan/alternator belt tension 27-30 ft•lb (36-40 N•m) Change hydraulic fluid filter (initial) Check air filter Vacuator® valve Clean alternator cooler turbine PLOW Change vibrator oil (initial) 1.2 qt (1.1 L) MPL...
  • Page 111 420sx Operator’s Manual Service - 110 50 Hour Check Fan/Alternator Belt Tension Check belt tension every 50 hours. Belt is properly tensioned when it moves about 3/8” (10 mm) when pushed at the long span (4). To adjust belt, move tensioner pulley: Note: Boltheads are hidden.
  • Page 112 420sx Operator’s Manual Service - 111 50 Hour Check Air Filter Dust Ejection Valve Check the dust ejection valve on the air filter every 50 hours. Replace if damaged. The valve should close when the engine is running for proper operation. Ensure that air filter cover is installed with valve at the 8 o’clock position.
  • Page 113 420sx Operator’s Manual Service - 112 50 Hour Plow Change Plow Vibrator Oil (Initial) Change plow vibrator oil for the first time at 50 hours and every 500 hours thereafter. To change: 1. Open fill (1) to vent vibrator. 2. Drain oil at drain plug (3).

  • Page 114: 250 Hour

    420sx Operator’s Manual Service - 113 250 Hour 250 Hour Location Task Notes TRACTOR Change inline fuel filter (if equipped) Used on early units. Change Inline Fuel Filter Change inline fuel filter every 250 hours. Install new filter with arrow pointing in the direction of the fuel flow.

  • Page 115: 500 Hour

    420sx Operator’s Manual Service - 114 500 Hour 500 Hour Location Task Notes TRACTOR 8 qt (7.6 L) DEO Change engine oil and filter Change primary fuel filter Change hydraulic fluid and filter 9.7 gal (36.7 L) THF Check differential oil level...
  • Page 116 420sx Operator’s Manual Service - 115 500 Hour Change Primary Fuel Filter Change primary fuel filter (shown) every 500 hours. Change Hydraulic Fluid and Filter Change hydraulic fluid and filter every 500 hours. 1. Remove plug (1) and drain fluid.
  • Page 117 420sx Operator’s Manual Service - 116 500 Hour Check Differential Oil Level Check oil level at fill plug (shown) every 500 hours. Add MPL as needed. Check Ground Drive Gearbox Oil Level Check oil level at plug (shown) every 500 hours. Add MPL at plug as needed.
  • Page 118 420sx Operator’s Manual Service - 117 500 Hour Plow Change Plow Vibrator Oil Change plow vibrator oil every 500 hours. To change: 1. Open fill (1) to vent vibrator. 2. Drain oil at drain plug (3). 3. Replace plug and move plow vibrator to horizontal position, with vibrator level and skid shoes on ground.

  • Page 119: 1000 Hour

    420sx Operator’s Manual Service - 118 1000 Hour 1000 Hour Location Task Notes TRACTOR Change ground drive gearbox oil 2 qt (1.89 L) MPL Change ground drive differential oil 5 qt (4.7 L) MPL Check Ground Drive Gearbox Oil Level Check oil level at check plug (2) every 1000 hours.

  • Page 120: As Needed

    420sx Operator’s Manual Service - 119 As Needed As Needed Location Task Notes TRACTOR Clean engine cooling system Change air filter elements Adjust parking brake Check battery Inspect muffler Inspect ROPS bolts TRENCHER Replace digging chain and sprocket PLOW Replace plow blade...
  • Page 121 420sx Operator’s Manual Service - 120 As Needed Tractor Clean Engine Cooling System Clean engine cooling system with high-pressure air as needed. Change Air Filter Elements Change air filter when yellow band reaches red line on air filter service indicator.
  • Page 122 420sx Operator’s Manual Service - 121 As Needed Adjust Parking Brake Adjust parking brake as needed. To tighten: 1. Disengage parking brake. 2. Remove orange sleeve. 3. Twist lever clockwise. Engage parking brake to test tension. 4. Repeat 1-3 until parking brake is properly adjusted.
  • Page 123 420sx Operator’s Manual Service - 122 As Needed Inspect Muffler Inspect muffler for looseness as needed. Inspect ROPS Bolts Check all frame bolts, welds, and retainer bolts and pins as needed.
  • Page 124 420sx Operator’s Manual Service - 123 As Needed Trencher Replace Digging Chain Visually check digging chains for wear on rollers and sidebars (2). Check pins (3) and bushing wear by measuring distance between chain pins and comparing it with a new chain. Also check digging teeth (1).
  • Page 125 420sx Operator’s Manual Service - 124 As Needed 8. Loop cable through links nearest connector pin. t12om090h.eps Pressurized fluid could pierce skin and cause injury or death. Stay away. NOTICE: Service digging boom grease cylinder only while standing on opposite side of boom.
  • Page 126 420sx Operator’s Manual Service - 125 As Needed To install chain: 1. Lay chain on ground with teeth down and pointed toward unit. Loop cable through end links. 2. Fasten and adjust seatbelt. 3. Start tractor. See page 50 for start-up procedures.
  • Page 127 420sx Operator’s Manual Service - 126 As Needed Plow Replace Plow Blade Check plow blade for wear and replace as needed. Blade should be changed if: • Plow toe edge is worn to a curve • Side plates begin to peel •...
  • Page 128 420sx Operator’s Manual Service - 127 As Needed 7. Insert plow blade, aligning blade boss with the upper pin in the vibrator housing. Use the ground to support the toe of the blade. 8. Install upper tapered pin and keeper pins.
  • Page 129 420sx Operator’s Manual Service - 128 As Needed...

  • Page 130: Specifications

    420sx Operator’s Manual Specifications - 129 420sx Specifications 420sx Dimensions * U.S. Metric Overall height, ROPS upright 91 in 2.31 m Overall height, ROPS folded down 71 in 1.80 m Overall height, trenching boom fully raised (2’ boom w/ 75 in...
  • Page 131 420sx Operator’s Manual Specifications - 130 420sx Plow depth, maximum 24 in 609.60 mm Distance from ground to plow tip, plow fully raised 18.5 in 470 mm Distance from center of front wheel to front of machine 31.5 in 800 mm Distance from front of machine to end of boom, fully 25.6 in...
  • Page 132 420sx Operator’s Manual Specifications - 131 420sx Stroke 4.4 in 112 mm Engine manufacturer’s gross power rating @ 2300 rpm (SAE J1995) 41.4 hp 30.94 kW Estimated net power rating @ 2300 rpm (SAE J1349) 41 hp 30.5 kW Hydraulic System U.S.
  • Page 133 420sx Operator’s Manual Specifications - 132 420sx Fluid Capacities U.S. Metric Fuel tank 11.1 gal 42.0 L Engine oil with filter 6.0 qt 7.6 L Hydraulic reservoir 9.7 gal 36.7 L Hydraulic system 10.2 gal 38.6 L Ground drive gearbox 2.0 qt...
  • Page 134 420sx Operator’s Manual Specifications - 133 420sx Roto Witch® Bore diameter 1.75 - 12 in 45-305 mm Motor displacement 18.7 in Torque @ 3000 psi 750 ft•lb 1009 N•m Speed, low (no load) 185 rpm 185 rpm Speed, high (no load)
  • Page 135 420sx Operator’s Manual Specifications - 134 420sx...

  • Page 136: Support

    Return damaged parts to dealer for inspection and warranty consideration if in warranty time frame. Order genuine Ditch Witch replacement or repair parts from your authorized Ditch Witch dealer. Use of another manufacturer's parts may void warranty consideration.
  • Page 137 Subject to the limitations 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 Charles Machine Works, Inc. (CMW) that fail due to a defect in material or workmanship within one (1) year of first commercial use (Exception: 2 years for all SK5 attachments).

  • Page 140: Service Record

    420sx Operator’s Manual Service Record - 139 Service Record Service Performed Date Hours...
  • Page 141 420sx Operator’s Manual Service Record - 140 Service Performed Date Hours...

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