1. Manuals
  2. Brands
  3. CMW Manuals
  4. Lawn and Garden Equipment
  5. HT220
  6. Operator's manual

CMW HT220 Operator's Manual

Large track trencher
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
HT220
Operator's
Manual
®
Issue 1.0
CMW
053- 1130

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the HT220 and is the answer not in the manual?

Questions and answers

Summary of Contents for CMW HT220

  • Page 1 HT220 Operator’s Manual ® Issue 1.0 053- 1130...

  • Page 2: Table Of Contents

    HT220 Operator’s Manual Overview - 1 Overview Chapter Contents Serial Number Location ..... . 2 Intended Use ....... 3 Unit Components .

  • Page 3: Serial Number Location

    HT220 Operator’s Manual Overview - 2 Serial Number Location Serial Number Location Record serial numbers and date of purchase in spaces provided. HT220 serial number is located as shown. Date of manufacture Date of purchase HT220 serial number Engine serial number...

  • Page 4: Intended Use

    Intended Use The HT220 is a large track trencher designed dig trenches up to 24” (609 mm) wide and 96” (2.44 m) deep. The trencher’s hard metal teeth remove very hard, rocky ground and thinly crush it. The result is an even, rectangular-shaped trench ready fro laying pipes or cables.

  • Page 5: Operator Orientation

    HT220 Operator’s Manual Overview - 4 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 6: Foreword

    HT220 Operator’s Manual Foreword - 5 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 7 Copyright 2007 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 8: Part Number, Revision Level, And Publication Date Of This Manual, And Factory Contact

    HT220 Operator’s Manual Contents - 7 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 9: Specifications

    HT220 Operator’s Manual Contents - 8 Specifications machine specifications including weights, measurements, power ratings, and fluid capacities Support the warranty policy for this machine, and procedures for obtaining warranty consideration and training Service Record a record of major service performed on the machine...

  • Page 10: Safety

    HT220 Operator’s Manual Safety - 9 Safety Chapter Contents Guidelines ....... . 10 Safety Alert Classifications .

  • Page 11: Guidelines

    HT220 Operator’s Manual Safety - 10 Guidelines Guidelines Follow these guidelines before operating any jobsite equipment: • Complete proper training and read operator’s manual before using equipment. • Contact your local One-Call service by dialing 811 (USA only) to have underground utilities located. A One-Call referral number, 888-258-0808, is also available for both the USA and Canada.

  • Page 12: Safety Alert Classifications

    HT220 Operator’s Manual Safety - 11 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 13: Safety Alerts

    HT220 Operator’s Manual Safety - 12 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 14 HT220 Operator’s Manual Safety - 13 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 15 HT220 Operator’s Manual Safety - 14 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 16: Emergency Procedures

    HT220 Operator’s Manual Safety - 15 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 17: If An Electric Line Is Damaged

    HT220 Operator’s Manual Safety - 16 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 18: If A Gas Line Is Damaged

    HT220 Operator’s Manual Safety - 17 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 19 HT220 Operator’s Manual Safety - 18 Emergency Procedures...

  • Page 20: Operation Overview

    HT220 Operator’s Manual Operation Overview - 19 Operation Overview Chapter Contents Planning........20 Trenching.

  • Page 21: Leaving Jobsite

    HT220 Operator’s Manual Operation Overview - 20 Planning Planning 1. Gather information about jobsite. See page 42. 2. Inspect jobsite. See page 43. 3. Classify jobsite. See page 44. 4. Select chain and teeth to match your soil type, if necessary. See page 78.

  • Page 22: Controls

    HT220 Operator’s Manual Controls - 21 Controls Chapter Contents Center Console ......22 •...

  • Page 23: Center Console

    HT220 Operator’s Manual Controls - 22 Center Console Center Console Switches 1. Throttle 4. Light Control 2. Engine Ignition Switch 5. Light Switch 3. Low Hydraulic Fluid Test Switch 6. Horn Item Description Notes 1. Throttle To increase throttle, turn knob counterclockwise.
  • Page 24 HT220 Operator’s Manual Controls - 23 Center Console Item Description Notes 2. Engine Ignition Switch To start engine, insert key and turn clockwise. To stop engine, turn counterclockwise. 3. Low Hydraulic Fluid To check for low hydraulic Switch is normally centered.

  • Page 25: Indicators

    HT220 Operator’s Manual Controls - 24 Center Console Indicators 1. Maintenance Indicator 6. Right Track Filter Indicator 2. Wait to Start Indicator 7. Single Filter Indicator 3. Air Filter Indicator 8. Digging Filter Indicator 9. Low Hydraulic Fluid Indicator 4. Left Track Filter Indicator 5.
  • Page 26 HT220 Operator’s Manual Controls - 25 Center Console Item Description Notes 2. Wait to Start Indicator Light goes out when engine is ready to start. 3. Air Filter Indicator Light comes on when the air filter is dirty. Left Track Filter...
  • Page 27 HT220 Operator’s Manual Controls - 26 Center Console Item Description Notes 6. Right Track Filter Light comes on when the right Indicator track filter needs replacing. 7. Single Filter Indicator Light comes on when the single filter needs replacing. 8. Digging Filter Indicator Light comes on when the digging filter needs replacing.
  • Page 28 HT220 Operator’s Manual Controls - 27 Center Console Item Description Notes 10. Warning Ignition “On” Buzzer sounds when engine Indicator is not running and the ignition switch is on.

  • Page 29: Trenching Controls

    HT220 Operator’s Manual Controls - 28 Center Console Trenching Controls 1. Conveyor Shift Control 6. Auto Stabilizer Control 2. Conveyor Direction Control 7. Boom Lift Control 3. Conveyor Speed Control 8. Cruise Control Set Control 4. Trench Cleaner Control 9. Trencher Drive Control 5.
  • Page 30 HT220 Operator’s Manual Controls - 29 Center Console Item Description Notes 2. Conveyor Direction To dump spoil to the left, Control press down. To dump spoil to the right, press up. 3. Conveyor Speed To increase conveyor belt Control speed, turn clockwise.
  • Page 31 HT220 Operator’s Manual Controls - 30 Center Console Item Description Notes 6. Auto Stabilizer Control For automatic stabilizers, push up. For manual stabilizers, pull down. 7. Boom Lift Control To raise boom, push up. To lower boom, pull down. 8. Cruise Control Set...

  • Page 32: Gauges

    HT220 Operator’s Manual Controls - 31 Center Console Gauges 1. Diagnostic Display Gauge 4. Right Track Pressure Gauge 2. Hydraulic Fluid Temperature Gauge 5. Trencher Pressure Gauge 3. Left Track Pressure Gauge 6. Equipment System Pressure Gauge Item Description Notes 1.
  • Page 33 HT220 Operator’s Manual Controls - 32 Center Console Item Description Notes 2. Hydraulic Fluid Displays hydraulic fluid Do not exceed 190° F (88° C). Temperature Gauge temperature. 3. Left Track Pressure Displays hydraulic fluid Do not exceed 5,000 PSI (344 bar).
  • Page 34 HT220 Operator’s Manual Controls - 33 Center Console Item Description Notes 6. Equipment System Displays hydraulic system Do not exceed 2,500 PSI (172 bar) Pressure Gauge pressure.

  • Page 35: Drive Controls

    HT220 Operator’s Manual Controls - 34 Center Console Drive Controls 1. Cruise Control Switch 6. Direction Control 2. Sensitivity Control 7. Radius Control 3. auto - manual switch 8. Parking Brake 9. Emergency Engine Stop 4. Ground Drive Speed 5. Steering Control...
  • Page 36 HT220 Operator’s Manual Controls - 35 Center Console Item Description Notes 2. Sensitivity Control To decrease sensitivity, turn left. To increase sensitivity, turn right. 3. Auto - Manual Switch To engage cruise control, push up. To disengage cruise control, pull down.
  • Page 37 HT220 Operator’s Manual Controls - 36 Center Console Item Description Notes 7. Radius Control To increase pressure on the left track, turn knob to left. To increase pressure on the right track, turn knob to the right. To equalize pressure, turn knob to center.

  • Page 38: Diagnostic Display

    HT220 Operator’s Manual Controls - 37 Diagnostic Display Diagnostic Display 1. Enter Key 3. Menu Key 2. Arrow Keys Item Description Notes 1. Enter Key To select the highlighted parameter on the screen, touch the ENTER key.
  • Page 39 HT220 Operator’s Manual Controls - 38 Diagnostic Display Item Description Notes 2. Arrow Keys To scroll through the screen toward the right or downward, press the Right Arrow key. To scroll through the screen toward the left or upward, press the Left Arrow key.

  • Page 40: Seat

    HT220 Operator’s Manual Controls - 39 Seat Seat 1. Seat Slide Control 3. Seat Belt 2. Seat Swivel Control Item Description Notes 1. Seat swivel control To slide seat, move control away from seat. 2. Seat slide control To swivel seat, move control toward back of seat.

  • Page 41: Top Console

    HT220 Operator’s Manual Controls - 40 Top Console Top Console 1. Fan Power Control (three speed) 4. Cab Light Switch 2. Air Conditioner Power Knob 5. Alternate Escape Method 3. Cab Pressurizer Switch 6. Windshield Wiper Handle Item Description Notes 1.

  • Page 42: Prepare

    HT220 Operator’s Manual Controls - 41 Top Console Item Description Notes 2. Ventilation (fan) power To adjust the rate of air flow, control turn control. 3. Cab pressurizer switch To pressurize cab, press switch. 4. Cab light switch To turn cab light on, turn switch to the ON position.

  • Page 43: Heater Controls

    HT220 Operator’s Manual Controls - 42 Heater Controls Heater Controls 1. Coolant Return Valve 2. Coolant Delivery Valve Item Description Notes 1. Coolant return valve To turn heater ON, turn valve Ensure that air conditioner switch is in inline. the ‘OFF’ position before opening the heater valves.

  • Page 44: Battery Disconnects

    HT220 Operator’s Manual Controls - 43 Battery Disconnects Battery Disconnects 1. Master disconnect (24V) 2. Master disconnect (0V) Item Description Notes 1. Master Disconnect (0V) To connect the battery to the electrical system, rotate clockwise. To disconnect the battery from the electrical system,...
  • Page 45 HT220 Operator’s Manual Controls - 44 Battery Disconnects Item Description Notes 2. Circuit Breaker Lever To connect the battery to the electrical system, rotate clockwise. To disconnect the battery from the electrical system, rotate counterclockwise.

  • Page 46: Emergency Stop

    HT220 Operator’s Manual Controls - 45 Emergency Stop Emergency Stop Item Description Notes Emergency Engine Stop To stop machine immediately, To release the stop function, the Buttons press button. button must be pulled “out” or twisted clockwise to the “out” position. The switches must be reset in order for the engine to start.
  • Page 47 HT220 Operator’s Manual Controls - 46 Emergency Stop...
  • Page 48 HT220 Operator’s Manual Prepare - 47 Prepare Chapter Contents Gather Information ......48 • Review Job Plan ......... . .48 •...

  • Page 49: Gather Information

    HT220 Operator’s Manual Prepare - 48 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 50: Inspect Site

    HT220 Operator’s Manual Prepare - 49 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 51: Classify Jobsite

    HT220 Operator’s Manual Prepare - 50 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 your local One-Call service by dialing 811 (USA only) to have underground utilities located. A One-Call referral number, 888-258-0808, is also available for both the USA and Canada.

  • Page 52: Apply Precautions

    HT220 Operator’s Manual Prepare - 51 Classify Jobsite Apply Precautions Once classified, precautions appropriate for jobsite must be taken. Electric Jobsite Precautions Use one or both of these methods. • Expose line by careful hand digging or soft excavation. •...

  • Page 53: Check Supplies And Prepare Equipment

    HT220 Operator’s Manual Prepare - 52 Check Supplies and Prepare Equipment Check Supplies and Prepare Equipment Supplies • fuel • keys • personal protective equipment, such as hard hat and safety glasses • digging teeth Fluid Levels • fuel •...

  • Page 54: Drive

    HT220 Operator’s Manual Drive - 53 Drive Chapter Contents Start Unit ....... . . 54 Drive .
  • Page 55 HT220 Operator’s Manual Drive - 54 Start Unit Start Unit Before operating tractor, read engine manufacturer’s starting and operating instructions. Follow instructions for new engine break-in. Runaway possible. Machine could run over you or others. Learn how to use all controls. Start and operate only from operator’s position.
  • Page 56 HT220 Operator’s Manual Drive - 55 Start Unit 5. Turn ignition switch to the run position (key on, engine off). Cold start wait indicator will light. NOTICE: If engine does not start within 20 seconds, release the ignition switch. Allow starter to cool before attempting to start the unit again.
  • Page 57 HT220 Operator’s Manual Drive - 56 Drive Drive EMERGENCY SHUTDOWN: Press the emergency stop button to stop. 1. Verify that parking brake is disengaged. 2. Adjust throttle to about half way. 3. Adjust boom lift switch to raise boom. 4. Adjust the direction control lever to move unit forward or backward.
  • Page 58 HT220 Operator’s Manual Drive - 57 Start After Emergency Stop Start After Emergency Stop 1. Turn all panel controls in use at the moment of the emergency stop to the neutral position. 2. Turn the emergency stop push-button counterclockwise. 3. Turn the key to the start position.
  • Page 59 HT220 Operator’s Manual Drive - 58 Start After Emergency Stop...

  • Page 60: Transport

    HT220 Operator’s Manual Transport - 59 Transport Chapter Contents Lift ........60 •...

  • Page 61: Lift

    HT220 Operator’s Manual Transport - 60 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 62: Procedure

    HT220 Operator’s Manual Transport - 61 Lift Procedure Tractor Use a crane capable of supporting the equipment's size and weight. See “Specifications” on page 135. Use indicated lift points (shown).

  • Page 63: Tie Down

    HT220 Operator’s Manual Transport - 62 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 tiedown decals. Securing to trailer at other points is unsafe and can damage machinery.

  • Page 64: Haul

    HT220 Operator’s Manual Transport - 63 Haul Haul Incorrect procedures could result in death, injury, or property damage. Learn to use equipment correctly. NOTICE: • Read trailer operator’s manual before loading or transporting your machine. Incorrectly loaded machine can slip or cause trailer sway.
  • Page 65 HT220 Operator’s Manual Transport - 64 Haul 1. Fasten and adjust seat belt. 2. Start tractor. See page 56 for proper start-up procedures. 3. Raise trenching boom, but keep it low. 4. Release parking brake. 5. Use speed/direction control to slowly drive unit onto trailer until tiedown position is reached.

  • Page 66: Tow

    HT220 Operator’s Manual Transport - 65 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: • Do not tow for more than 200 yd (180 m).
  • Page 67 HT220 Operator’s Manual Transport - 66 3. Wrap a chain or cable around the boom, chain and baseplates. 4. Hook one unit to tow in the front, and another in the back to aid in braking. Avoid towing over long distances.

  • Page 68: Trench

    HT220 Operator’s Manual Trench - 67 Trench Chapter Contents Setup ........68 Operation .

  • Page 69: Setup

    HT220 Operator’s Manual Trench - 68 Setup Setup EMERGENCY SHUTDOWN: Press the emergency stop button to stop. Crushing weight could cause death or serious injury. Use proper procedures and equipment or stay away. Jobsite hazards could cause death or serious injury. Use correct equipment and work methods.

  • Page 70: Operation

    HT220 Operator’s Manual Trench - 69 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 71 HT220 Operator’s Manual Trench - 70 Operation 1. Select the desired direction and position for conveyors to run and operate them at a moderate speed. 2. Lift the trench cleaner completely. IMPORTANT: The only function of the trench cleaner is keeping the trench bottom clean. It must not be used for pushing or pulling anything.

  • Page 72: Operating Tips

    HT220 Operator’s Manual Trench - 71 Operating Tips Operating Tips Trenching • Operate engine at full throttle under load for most productive trenching. If soil conditions permit, operating in this range gives longer engine life and more efficient use of available engine power.
  • Page 73 HT220 Operator’s Manual Trench - 72 Operating Tips...

  • Page 74: Systems And Equipment

    HT220 Operator’s Manual Systems and Equipment - 73 Systems and Equipment Chapter Contents Chain, Teeth, and Sprockets ....74 • Chain and Tooth Maintenance ....... .74 •...

  • Page 75: Chain, Teeth, And Sprockets

    HT220 Operator’s Manual Systems and Equipment - 74 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 76: Chain Selection

    HT220 Operator’s Manual Systems and Equipment - 75 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 77: Optional Equipment

    HT220 Operator’s Manual Systems and Equipment - 76 Optional Equipment Optional Equipment See your Ditch Witch dealer for more information about the following optional equipment. Tractor Equipment Description light kit p/n 215-1191 window cover kit p/n 190-1174 Trencher Equipment Description...

  • Page 78: Diagnostics

    HT220 Operator’s Manual Systems and Equipment - 77 Diagnostics Diagnostics Display of Failure The red error warning light signals the presence of a possible failure. Reading Error Messages Press <F3> on the BB3 diagnostic instrument. The latest error is shown on the upper corner of the display.
  • Page 79 HT220 Operator’s Manual Systems and Equipment - 78 Diagnostics Error Failure Type Function Affected Error Effect Message Warning List Light Sol. Motor Short circuit/ Chain pump solenoid Slow speed inserted Drive and interrupted cable or forward digging possible. (Reset by...
  • Page 80 HT220 Operator’s Manual Systems and Equipment - 79 Diagnostics Error Failure Type Function Affected Error Effect Message Warning List Light Fine Steer. Short circuit / ‘Fine steering’ Drive locked. After bringing the Pot. interrupted cable or potentiometer direction lever back to centre: potentiometer the warning light blinks;...

  • Page 81: Engine Failure Code List

    HT220 Operator’s Manual Systems and Equipment - 80 Diagnostics Error Failure Type Function Affected Error Effect Message Warning List Light Seat Switch Operator not Seat switch open The diesel engine stalls in 5 seated / seat switch seconds. The starter does not faulty or cable run.
  • Page 82 HT220 Operator’s Manual Systems and Equipment - 81 Diagnostics Failure Code Cause Effect (only when the failure code is active) Warning Light 123 Yellow Low voltage from the turbo pressure The engine output will be reduced to a non- sensor signal has been detected on supercharging rpm.
  • Page 83 HT220 Operator’s Manual Systems and Equipment - 82 Diagnostics Failure Code Cause Effect (only when the failure code is active) Warning Light 153 Yellow High voltage from the suction The controller will use a default temperature manifold temperature signal has...
  • Page 84 HT220 Operator’s Manual Systems and Equipment - 83 Diagnostics Failure Code Cause Effect (only when the failure code is active) Warning Light 278 Yellow Error detected in the AC pump circuit Possible low output; the engine might stall, on pin 11 of the engine connector.
  • Page 85 HT220 Operator’s Manual Systems and Equipment - 84 Diagnostics Failure Code Cause Effect (only when the failure code is active) Warning Light 368 Yellow The VP44 pump is not timed as Serious output drop. requested by the engine controller. 369 Yellow The VP44 pump is not timed as Serious output drop and possible white smoke.
  • Page 86 HT220 Operator’s Manual Systems and Equipment - 85 Diagnostics Failure Code Cause Effect (only when the failure code is active) Warning Light 387 Yellow High voltage has been detected on No signal of engine performance or the engine the accelerator position circuit on +5 might not be running.
  • Page 87 HT220 Operator’s Manual Systems and Equipment - 86 Diagnostics Failure Code Cause Effect (only when the failure code is active) Warning Light 441 Yellow Voltage has been detected on the The engine stalls or runs irregularly. controller power supply on pins 38, 39 and 40 of the engine connector;...
  • Page 88 HT220 Operator’s Manual Systems and Equipment - 87 Diagnostics Failure Code Cause Effect (only when the failure code is active) Warning Light 527 Yellow An error has been detected in the The Dual Output Driver “A” - controlled device will Dual Output Driver “A”...

  • Page 89: Determining Error Codes

    HT220 Operator’s Manual Systems and Equipment - 88 Diagnostics Determining Error Codes The failure codes can be read during the engine operation or when the engine instrument panel is on. The diagnostic panel typically includes: 1. A “WARNING”, a “STOP” and a “MAINTENANCE” warning light.
  • Page 90 HT220 Operator’s Manual Systems and Equipment - 89 Diagnostics 5. At this point the warning light related to maintenance should blink three times and the maintenance interval should reset. IMPORTANT: Complete maintenance before resetting the maintenance interval. Correct maintenance is...

  • Page 91: Irregular Functions

    HT220 Operator’s Manual Systems and Equipment - 90 Diagnostics Irregular Functions Retroactive System for Straight Running Control The straight running control system compares the lever-controlled steering or the fine steering knob with the signals emitted by the sensors placed on both hydraulic motors of the tracks. Retroaction is carried out by adjusting the piston displacement of the track pumps.
  • Page 92 HT220 Operator’s Manual Systems and Equipment - 91 Diagnostics Engine Load Control The load control is able to sense the output overload through the rpm decrease, due to a sensor placed on the engine flywheel bell. The system can be activated by turning the digging selector on the track drive, thus slowing down the machine forward speed in case of overload.
  • Page 93 HT220 Operator’s Manual Systems and Equipment - 92 Diagnostics...

  • Page 94: Complete The Job

    HT220 Operator’s Manual Complete the Job - 93 Complete the Job Chapter Contents Rinse Equipment ......94...

  • Page 95: Equipment

    HT220 Operator’s Manual Complete the Job - 94 Rinse Equipment Rinse Equipment Spray water onto equipment to remove dirt and mud. NOTICE: Do not spray water into the cab. Electrical components could be damaged. Wipe down instead. Stow Tools Make sure all tools and accessories are loaded on trailer.

  • Page 96: Service

    HT220 Operator’s Manual Service - 95 Service Chapter Contents Service Precautions ......96 Lubrication Overview ..... . . 97 Recommended Lubricants/Service Key .
  • Page 97 HT220 Operator’s Manual Service - 96 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 98 HT220 Operator’s Manual Service - 97 Lubrication Overview Lubrication Overview Lubrication Overview (left)
  • Page 99 HT220 Operator’s Manual Service - 98 Lubrication Overview Lubrication Overview (right)

  • Page 100: Specifications

    HT220 Operator’s Manual Service - 99 Recommended Lubricants/Service Key Recommended Lubricants/Service Key Item Description Diesel engine oil meeting API service classification CF-4 or E1-96 and SAE viscosity recommended by engine manufacturer (SAE 15W40) Multipurpose grease meeting ASTM D217 and NLGI 5...
  • Page 101 HT220 Operator’s Manual Service - 100 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 102 HT220 Operator’s Manual Service - 101 4 Hour 4 Hour Location Task Notes TRENCHER Lube flywheel gearbox Lube pivot bearings left and right Lube digging chain shaft bearing Lube Flywheel Gearbox Lube zerks with MPG every 4 hours. Lube Pivot Bearings (Left & Right)
  • Page 103 HT220 Operator’s Manual Service - 102 4 Hour Lube Digging Chain Shaft Bearing Lube zerks with MPG every 10 hours.
  • Page 104 HT220 Operator’s Manual Service - 103 10 Hour 10 Hour Location Task Notes TRACTOR Check emergency stop Lube torque post Lube cab door hinges Check engine oil level Check engine coolant level Check air filters Check cab air cleaner filters...
  • Page 105 HT220 Operator’s Manual Service - 104 10 Hour Check Emergency Stop Test function of each emergency stop button (shown) every 10 hours. See “Start After Emergency Stop” on page 57. 1. Turn ignition switch to the on position but do not start the engine.
  • Page 106 HT220 Operator’s Manual Service - 105 10 Hour Check Engine Oil Level Check engine oil level every 10 hours. Ensure that engine oil level is correct and inspect for contamination. Typical signs of oil contamination are: • oil discoloration •...
  • Page 107 HT220 Operator’s Manual Service - 106 10 Hour Check Cab Air Cleaner Filters Check cab air cleaner every 10 hours. Replace as necessary. Check Hydraulic Fluid Level Inspect hydraulic fluid level every 10 hours. If the fluid level is not visible through the sight glass (2) then add fluid at fill (1) until fluid can be seen through the sight glass (2).
  • Page 108 HT220 Operator’s Manual Service - 107 10 Hour Check Hydraulic Hoses Fluid or air pressure could pierce skin and cause injury or death. Stay away. NOTICE: Escaping pressurized fluid can cause injury or pierce skin and poison. • Before disconnecting a hydraulic line, turn engine off and operate all controls to relieve pressure.
  • Page 109 HT220 Operator’s Manual Service - 108 10 Hour Check Gearbox and Coupler Check gearboxes every 10 hours. Inspect the flywheel gearbox (1), the two track gearboxes (2) and the engine pump (3) to spot possible leakages. The flywheel gearbox cases and the coupler case are all equipped with an air vent, oil level tank plug and drain plug.
  • Page 110 HT220 Operator’s Manual Service - 109 10 Hour Check Nuts and Bolts Check nuts and bolts every 10 hours. Check that there are no loose fasteners. If any fasteners are loose, tighten them to the correct torque specifications. IMPORTANT: Check the chain digging plates...
  • Page 111 HT220 Operator’s Manual Service - 110 10 Hour Trencher Lube Conveyor (Left and Right) Lube zerks with MPG every 10 hours. Lube Stabilizer Pins (Left and Right) Lube zerks with MPG every 10 hours.
  • Page 112 HT220 Operator’s Manual Service - 111 10 Hour Check and Adjust Conveyor Belts Check conveyor belts every 10 hours. Ensure that belt is not excessively worn and is set at the proper tension. Too much tension will cause excessive friction between the belt and the side sills, performance loss and premature wear.
  • Page 113 HT220 Operator’s Manual Service - 112 10 Hour Check Tail Roller Check tail roller every 10 hours. Short Boom Check that the tail roller does not show excessive wear signs and that the bearings (shown) do not have any backlash. Also make sure that the seals do not leak.
  • Page 114 HT220 Operator’s Manual Service - 113 10 Hour Check Digging Chain Inspect Digging Chain Inspect for excessive wear and proper tension every 10 hours. The proper limit is 2” - 2.5” (5.08 cm - 6.35 cm) sag (A) on a cold chain with baseplates installed, measured at the point of greatest sag with the boom in a horizontal position.
  • Page 115 HT220 Operator’s Manual Service - 114 10 Hour Check Chain Baseplates and Tooth- stops The machine is equipped with specific-width tooth-stop plates (1). The tooth-stop plates and pockets are provided with a hard metal coating in their easily-worn parts. This coating must always be preserved to guarantee the life of the tooth-stop pocket plates.
  • Page 116 HT220 Operator’s Manual Service - 115 10 Hour Check Chain Sprocket Check digging chain sprocket every 10 hours. Check that the sprocket is not damaged or exceedingly worn. Replace or rotate the sprocket if the other side is not worn. Avoid any “hook”...
  • Page 117 HT220 Operator’s Manual Service - 116 50 Hour 50 Hour Location Task Notes TRACTOR Inspect undercarriage pins and bushings TRENCHER Check and adjust digging chain gearbox and flywheel fluid level Lube tail roller Tractor Check Undercarriage Pins and Keepers Check undercarriage pins and keepers every 50 hours.
  • Page 118 HT220 Operator’s Manual Service - 117 50 Hour Check Tail Roller Lube tail roller every 50 hours. Short Boom IMPORTANT: Schedule lubrication during an idle time to prevent water from oxidizing the bearings. Remove cap and lube with MPG. IMPORTANT: •...
  • Page 119 HT220 Operator’s Manual Service - 118 100 Hour 100 Hour Location Task Notes TRENCHER Check rubber mount supports Check undercarriage rollers Clean breathers Check track tension Lube hydraulic motors splined shafts Change engine air filters Change engine oil (initial) Change engine oil filter (initial) Check Rubber Mounts Check rubber mounts every 100 hours.
  • Page 120 HT220 Operator’s Manual Service - 119 100 Hour Check Breathers Check breathers (shown) every 100 hours. Check that there are no obstructions or sediment build-ups. Clean the breathers in case of obstructions. Use an oil-based solvent. Do not carry out the operation using flammable solvents or standing near a fire, sparks or other flammable sources.
  • Page 121 HT220 Operator’s Manual Service - 120 100 Hour Lubricate Hydraulic Motor Splines Lubricate all hydraulic motor and flywheel gearbox drive motor splines every 100 hours. 1. Unbolt and slide motors out of position. 2. Lubricate the female spline with a heavy-duty wheel bearing grease.

  • Page 122: Capacities

    HT220 Operator’s Manual Service - 121 100 Hour Change Engine Oil and Filter (initial) Change the engine oil and filter after first 100 hours and at 250 hours. 1. Place a container, capable of holding 27 qt (26 L) of oil, below drain plug (3).

  • Page 123: Capacities

    HT220 Operator’s Manual Service - 122 250 Hour 250 Hour Location Task Notes TRACTOR Change engine oil and filter Check engine oil breather Inspect engine belts Change hydraulic filters (initial) Change Engine Oil and Filter Change the engine oil and filter after first 100 hours and at 250 hours.
  • Page 124 HT220 Operator’s Manual Service - 123 250 Hour Check Engine Oil Breather Check engine oil breather every 250 hours. Clean or replace as necessary. Check Engine Belts Check engine belt tension every 250 hours. Check that the air conditioner compressor belt is correctly tightened.
  • Page 125 HT220 Operator’s Manual Service - 124 250 Hour Change Hydraulic Filters (Initial) Change hydraulic filters every 250 hours. Replace the hydraulic filters: 1. Close all six valves on the hydraulic fluid tank. 2. Clean the external filter casings. 3. Loosen and remove the filter casing.
  • Page 126 HT220 Operator’s Manual Service - 125 500 Hour 500 Hour Location Task Notes TRACTOR Change ground drive gearbox oil Change coupler oil Change hydraulic fluid Change hydraulic filters Replace fluid suction filters Check parking brakes Trencher Change digging chain gearbox and flywheel oil...
  • Page 127 HT220 Operator’s Manual Service - 126 500 Hour Change Hydraulic Fluid Change hydraulic fluid and filters every 500 hours. Drain hydraulic fluid from the tank (3) into a container suitable for transport or disposal. Remove breather (1) and add hydraulic fluid. Use the sight glass (2) to ensure that the proper amount of hydraulic fluid has been added.
  • Page 128 HT220 Operator’s Manual Service - 127 500 Hour Replace Hydraulic Fluid Suction Filters Replace hydraulic fluid suction filter every 500 hours. 1. Remove all tank suction filters. 2. Clean the suction filters and breather, the magnetic plug and relevant wire net filter with non-flammable solvent.
  • Page 129 HT220 Operator’s Manual Service - 128 500 Hour Change Flywheel Gearbox Fluid Change flywheel gearbox fluid every 500 hours. IMPORTANT: The engine-pump/coupler, flywheel gearbox, and the two track gearboxes must be serviced at the same time. 1. To fill, remove the breathers (1, 2).
  • Page 130 HT220 Operator’s Manual Service - 129 1000 Hour 1000 Hour Location Task Notes TRACTOR Change engine coolant Change Engine Coolant Hot parts may cause burns. Do not touch until cool. NOTICE: Do not remove the pressure cap from a hot engine. Wait until the coolant temperature is below 122°...
  • Page 131 HT220 Operator’s Manual Service - 130 1000 Hour Flush Hot parts may cause burns. Do not touch until cool. NOTICE: Do not remove the pressure cap from a hot engine. Wait until the coolant temperature is below 122° F (50° C) before removing the pressure cap. Heated coolant spray or steam can cause personal injury.
  • Page 132 HT220 Operator’s Manual Service - 131 1500 Hour 1500 Hour Location Task Notes TRENCHER Exchange flywheel gearbox Exchange Flywheel Gearbox Schedule flywheel gearbox to be exchanged every 1500 hours.
  • Page 133 HT220 Operator’s Manual Service - 132 As Needed As Needed Location Task Notes TRACTOR Adjust track tension TRENCHER Replace conveyor belt Adjust digging chain Replace wearplate Adjust Track Tension Adjust tension as needed. Check the track chain to make sure that it is suitably tightened.
  • Page 134 HT220 Operator’s Manual Service - 133 As Needed 7. Remove the lateral hose-end fitting sideboards (without removing the rubber from the metal sideboards). 8. Disassemble the motor roller (left or right). 9. Remove the “old” belt or cut it if unusable.
  • Page 135 HT220 Operator’s Manual Service - 134 As Needed Replace Wearplate Replace wearplate as needed. 1. Inspect wearplate (shown). 1. Turn all battery disconnects to the off position. See “Battery Disconnects” on page 43. 2. Cut the welds holding the wearplate to the boom.
  • Page 136 HT220 Operator’s Manual Specifications - 135 HT220 Trencher Specifications HT220 Trencher Dimensions U.S. Metric Angle of approach 22° 22° Trench width, maximum narrow chain boom 8-12 in 200 -310 mm single chain boom 11-18 in 280-460 mm double chain boom...
  • Page 137 HT220 Operator’s Manual Specifications - 136 HT220 Trencher Length, transport (with trench cleaner) 4 ft. boom 302 in 7.66 m 5 ft. boom 315 in 6 ft. boom 331 in 8.4 m Pitch - length from center drive sprocket to center idler 112 in 2.84 m...
  • Page 138 HT220 Operator’s Manual Specifications - 137 HT220 Trencher Power U.S. Metric Engine: Cummins QSB 5.9, diesel Cooling medium: extended life coolant Injection: direct Aspiration: turbocharged and charge air cooled Number of cylinders: 6 in-line Displacement 5.9 L 359 in Bore 4.02 in...

  • Page 139: Capacities

    HT220 Operator’s Manual Specifications - 138 HT220 Trencher Hydraulic System U.S. Metric Type: pressure and flow compensated (load sensing) Ground drive pump capacity at 2,250 rpm 13.6 gpm 51.5 L/min Ground drive pump relief setting 5,000 psi 344.7 bar Chain pump pressure...

  • Page 140: Support

    HT220 Operator’s Manual Support - 155 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 141 Defects will be determined by an inspection within thirty (30) days of the date of failure of the product or part by CMW or its authorized dealer. CMW will provide the location of its inspection facilities or its nearest authorized dealer upon inquiry. CMW reserves the right to supply remanufactured replacements parts under this warranty as it deems appropriate.

  • Page 144: Service Record

    HT220 Operator’s Manual Service Record - 159 Service Record Service Performed Date Hours...
  • Page 145 HT220 Operator’s Manual Service Record - 160 Service Performed Date Hours...

Table of Contents