CMW HT220 Operator's Manual

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Page 1

HT220

Operator’s Manual

CMW

Issue 1.0

053- 1130

Page 2

HT220 Operator’s Manual Overview - 1

Overview

Chapter Contents

Serial Number Location . . . . . . . . . . . . . . . . . . . . . . 2

Intended Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Unit Components . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Operator Orientation. . . . . . . . . . . . . . . . . . . . . . . . . 4

About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . 4

• Bulleted Lists. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

• Numbered Lists. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

• “Continued” Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

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Overview - 2 HT220 Operator’s Manual

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

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HT220 Operator’s Manual Overview - 3

Intended Use

The HT220 is a large track trencher designed dig tren ches 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. T he resu lt is an even , rectangular-shaped trench ready fro laying pipes or cables.

The unit is designed for operation in temperatures typically experienced in earth moving and construction work environments. Provisions may be required to operate in extreme temperatures. Contact your Ditch

Witch dealer.

The HT220 should be used with genuine Ditch Witch chain, teeth, and sprockets. It should be operated, serviced, and repaired only by persons familiar with its particular characteristics and acquainted with the relevant safety procedures.

Use in any other way is considered contrary to the intended use.

Unit Components

1. engine compartment

2. operator’s station

3. hydraulic reservoir

4. fuel tank

5. conveyor

6. trench cleaner

7. stabilizer

8. digging boom

9. trench cleaner shoe

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Overview - 4 HT220 Operator’s Manual

Operator Orientation

1. Front of unit

2. Right of unit

Right and left sides of machine are determined by facing front of unit while seated at the controls.

3. Rear of unit

4. Left of unit

About This Manual

This manual contains information for the proper use of this machine. See Operation Overview for basic operating procedures. Cross references such as “See page 50” will direct you to detailed procedures.

Bulleted Lists

Bulleted lists provide helpful or important information or contain procedures that do not have to be performed in a specific order.

Numbered Lists

Numbered lists contain illustration callouts or list steps that must be performed in order.

“Continued” Indicators

indicates that a procedure is continued on the next page.

CMW

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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 equipmen t at all times for future reference. 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. Attn: Marketing Department PO Box 66 Perry, OK 73077-0066 USA

The descriptions and specifications in this manual are subject to change without notice. The Charles Machine Works, Inc. reserves the right to improve equipment. Some product improvements may have taken place after this manual was publishe d. For the latest information on Ditch Witch equipment, see your Ditch Witch dealer.

Thank you for buying and using Ditch Witch equipment.

CMW

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Foreword - 6 HT220 Operator’s Manual

HT220

Operator’s Manual

Issue number 1.0/OM-4/07

Part number 053-1130

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 r egistered trademarks of The Charles Machine Works, Inc.

CMW

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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 information

Safety

machine safety alerts and emergency procedures

Controls

machine controls, gauges, and indicators and how to use them

Operation Overview

an overview for completing a job with this machine: planning, setting up, installing product, and restoring the jobsite; with cross references to deta iled procedures

Prepare

procedures for inspecting and classifying the jobsite, planning the installation path, and preparing the jobsite for work

Drive

procedures for startup, cold start, driving, and shutdown

Transport

procedures for lifting, hauling, and towing

Trench

procedures for trenching

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 of wear items, and basic maintenance

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Contents - 8 HT220 Operator’s Manual

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

117

139

143

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HT220 Operator’s Manual Safety - 9

Safety

Chapter Contents

Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Safety Alert Classifications . . . . . . . . . . . . . . . . . . 11

Safety Alerts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Emergency Procedures . . . . . . . . . . . . . . . . . . . . . 15

• Electric Strike Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

• If an Electric Line is Damaged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

• If a Gas Line is Damaged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

• If a Fiber Optic Cable is Damaged . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

• If Machine Catches on Fire. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

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Safety - 10 HT220 Operator’s Manual

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. You should also call any utility companies which do not participate in the One-Call service.

• Classify jobsite based on its hazards and use correct tools and machin ery, safety equipment, and work

methods for jobsite.

• Mark jobsite clearly and keep spectators away.

• Wear personal protective equipment.

• Review jobsite hazards, safety and emergency procedures, and individual responsibilities with all

personnel before work begins. Safety videos are available from your Ditch Witch dealer.

• Replace missing or damaged safety shields and safety signs.

• 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, ma intenance, or equipmen t

use.

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HT220 Operator’s Manual Safety - 11

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. YOUR SAFETY IS AT STAKE.

Watch for the three safety alert levels: DANGER, WARNING and CAUTION. Learn what each level means.

indicates an imminently hazardous situation which, if not avoided, will result in death or

serious injury.

indicates a potentially hazardous situation which, if not avoided, could result in death or

serious injury.

indicates a potentially hazardous situation which, if not avoided, may result in minor or

moderate injury.

Watch for two other words: NOTICE and IMPORTANT. NOTICE can keep you from doing something that might damage the machine or someone's property. It

can also alert you against unsafe practices. IMPORTANT can help you do a better job or make your job easier in some way.

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Safety - 12 HT220 Operator’s Manual

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.

Know location of lines and stay away.

Deadly gases. Lack of oxygen or presence of gas will cause sickness or

death. Provide ventilation.

correct equipment and work methods. Use and maintain proper safety equipment.

proper procedures and equipment or stay away.

Jobsite hazards could cause death or serious injury. Use

Crushing weight could cause death or seriou s injur y. Use

Moving parts could cut off ha nd or foot. Stay away.

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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.

Rollover possible. If machine rolls over, you could be thrown from seat and

killed or crushed. Wear seat belt.

Improper control function could cause death or serious injury. If control does

not work as described in instructions, stop machine and have it serviced.

Looking into fiber optic cable could result in permanent vision damage. Do

not look into ends of fiber optic or unidentified cable.

Pressurized fluid or air could pierce skin a nd cause injur y or

death. Stay away.

Runaway possible. Machine could run over you or others. Learn how to use

all controls. Start and operate only from operator’s position.

smoking, no flame, no spark.

Fire or explosion possible. Fumes could ignite and cause burns. No

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Safety - 14 HT220 Operator’s Manual

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.

Flying objects may cause injury. Wear hard hat and safety glasses.

Hot parts may cause burns. Do not touch until cool.

Exposure to high noise levels may cause hearing loss. Wear hearing

protection.

Fall possible. Slips or trips may result in injury. Keep area clean.

Battery acid may cause burns. Avoid contact.

Improper handling or use of chemicals may result in illness, injury, or equipment damage. Follow instructions on labels and in material safety da ta sheets (MSDS).

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HT220 Operator’s Manual Safety - 15

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 proc edures and check that all safety precau tions have been taken.

EMERGENCY SHUTDOWN - Turn ignition switch to stop position or push remote e ngine stop button ( if equipped).

Electric Strike Description

Electric shock. Contacting electric lines will cause death or serious injury.

Know location of lines and stay away.

When working near electric cables, remember the following:

• Electricity follows all paths to ground, not just path of least resistance.

• Pipes, hoses, and cables will conduct electricity back to all equipment.

• Low voltage current can injure or kill. Almost one-third of work-related electrocutions result from contact with less than 440 volts.

Most electric strikes are not noticeable, but indications of a strike include:

• power outage

•smoke

•explosion

• popping noises

• arcing electricity

If any of these occur, assume an electric strike has occurred.

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Safety - 16 HT220 Operator’s Manual

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.

• Warn people nearby that an electric strike has occurred. Instruct them to leave the area and contact utility.

• Raise attachments and drive from immediate area.

• Contact utility company to shut off power.

• Do not return to jobsite or allow anyone into area until given permission by utility company.

If you suspect an electric line has been damaged and you are off tractor, DO NOT TOUCH TRACTOR. Take the following actions. The order and degree of action will depend upon the situation.

• LEAVE AREA. The ground surface may be electrified, so take small steps with feet close together to reduce the hazard of being shocked from one foot to the other. For more information, contact your Ditch Witch dealer.

• Contact utility company to shut off power.

• Do not return to jobsite or allow anyone into area until given permission by utility company.

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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.

If you suspect a gas line has been damaged, take the following actions. The order and degree of action will depend on the situation.

• Immediately shut off engine(s), if this can be done safely and quickly.

• Remove any ignition source(s), if this can be done safely and quickly.

• Warn others that a gas line has been cu t and that they sh ould leave the area.

• Leave jobsite as quickly as possible.

• Immediately call your local emergency phone number and utility company.

• If jobsite is along street, stop traffic from driving near jobsite .

• Do not return to jobsite until given permission by emergency personnel and utility company.

If a Fiber Optic Cable is Damaged

Do not look into cut ends of fiber optic or unidentified cable. Vision damage can occur.

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.

• Immediately move battery disconnect switch (if equipped) to disconnect position.

• If fire is small and fire extinguisher is available, attempt to extinguish fire.

• If fire cannot be extinguished, leave area as quickly as possible and contact emergency personnel.

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Safety - 18 HT220 Operator’s Manual

Emergency Procedures

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HT220 Operator’s Manual Operation Overview - 19

Operation Overview

Chapter Contents

Planning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Trenching. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Leaving Jobsite. . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

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Operation Overview - 20 HT220 Operator’s Manual

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.

5. Check supplies and prepare equipment. See page 46.

6. Haul equipment to jobsite. See page 54.

Trenching

1. Start unit. See page 48.

2. Position tractor and controls. See page 60.

3. Begin trenching. See page 61.

4. Complete the installation. See page 61.

5. Shut down tractor. See page 50.

Leaving Jobsite

1. Rinse equipment. See page 82.

2. Stow tools. See page 82.

3. Haul equipment away from jobsite. See page 54.

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HT220 Operator’s Manual Controls - 21

Controls

Chapter Contents

Center Console . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

• Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

• Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

• Trenching Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

• Gauges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

• Drive Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Diagnostic Display . . . . . . . . . . . . . . . . . . . . . . . . . 37

Seat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Top Console . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Heater Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Battery Disconnects . . . . . . . . . . . . . . . . . . . . . . . 43

Emergency Stop . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

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Controls - 22 HT220 Operator’s Manual

Center Console

Switches

1. Throttle

2. Engine Ignition Switch

3. Low Hydraulic Fluid Test Switch

Item Description Notes

1. Throttle T o incr ease throttle, turn knob

counterclockwise. To idle, push knob in.

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4. Light Control

5. Light Switch

6. Horn

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HT220 Operator’s Manual Controls - 23

Center Console

Item Description Notes

2. Engine Ignition Switch T o star t engine, insert key and

turn clockwise. To stop engine, turn

counterclockwise.

3. Low Hydraulic Fluid Test Switch

4. Light Control To adjust inside light level,

5. Light Switch To turn on lights, move to up

To check for low hydraulic fluid, move to down position.

turn knob.

position. To turn off lights, move to

down position.

Switch is normally centered.

6. Horn To sound horn, press.

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Controls - 24 HT220 Operator’s Manual

Center Console

Indicators

1. Maintenance Indicator

2. Wait to Start Indicator

3. Air Filter Indicator

4. Left Track Filter Indicator

5. Double Filter Indicator

Item Description Notes

1. Maintenance Indicator Light will come on when the

engine needs maintenance.

6. Right Track Filter Indicator

7. Single Filter Indicator

8. Digging Filter Indicator

9. Low Hydraulic Fluid Indicator

10. Warning Ignition “ON” Indicator

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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.

4. Left Track Filter Indicator

5. Double Filter Indicator Comes on when the double

Light comes on when the left track filter needs replacing.

filter needs replacing.

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Controls - 26 HT220 Operator’s Manual

Center Console

Item Description Notes

6. Right Track Filter Indicator

7. Single Filter Indicator Light comes on when the

8. Digging Filter Indicator Light comes on when the

Light comes on when the right track filter needs replacing.

single filter needs replacing.

digging filter needs replacing.

9. Low Hydraulic Fluid Indicator

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Illuminates when low fluid switch is pressed and fluid is low.

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HT220 Operator’s Manual Controls - 27

Center Console

Item Description Notes

10. War ning Ignition “On” Indicator

Buzzer sounds when engine is not running and the ignition switch is on.

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Controls - 28 HT220 Operator’s Manual

Center Console

Trenching Controls

1. Conveyor Shift Control

2. Conveyor Direction Control

3. Conveyor Speed Control

4. Trench Cleaner Control

5. Stabilizer Control

Item Description Notes

1. Conveyor Shift Control To shift left, move to up

position. To shift right, move to down

position.

6. Auto Stabilizer Control

7. Boom Lift Control

8. Cruise Control Set Control

9. Trencher Drive Control

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HT220 Operator’s Manual Controls - 29

Center Console

Item Description Notes

2. Conveyor Direction Control

3. Conveyor Speed Control

4. Trench Clea ner Control To raise trench cleaner, press

To dump spoil to the left, press down.

To dump spoil to the right, press up.

To increase conveyor belt speed, turn clockwise.

To decrease conveyor belt speed, turn counterclockwise.

up. T o lower trench cleaner, press

down.

5. Stabilizer Control To raise stabilizers, push up.

To lower stabilizers, pull down.

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Controls - 30 HT220 Operator’s Manual

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 Control

9. Trencher Drive Control To rotate trencher forward,

To set cruise control, turn knob.

push up. To rotate trencher backward,

pull down.

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HT220 Operator’s Manual Controls - 31

Center Console

Gauges

1. Diagnostic Display Gauge

2. Hydraulic Fluid Temperature Gauge

3. Left Track Pressure Gauge

Item Description Notes

1. Diagnostic Display Gauge

Digital display monitors engine functions.

4. Right Track Pressure Gauge

5. Trencher Pressure Gauge

6. Equipment System Pressure Gauge

See “Top Console ” on page 40.

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Controls - 32 HT220 Operator’s Manual

Center Console

Item Description Notes

2. Hydraulic Fluid Temperature Gauge

3. Left Track Pressure Gauge

4. Right Track Pressure Gauge

Displays hydraulic fluid temperature.

Displays hydraulic fluid pressure at the left track.

Displays hydraulic fluid pressure at the right track.

Do not exceed 190° F (88° C).

Do not exceed 5,000 PSI (344 bar).

5. Trencher Pressure Gauge

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Displays hydraulic fluid pressure at the trencher.

Do not exceed 5,000 PSI (344 bar).

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HT220 Operator’s Manual Controls - 33

Center Console

Item Description Notes

6. Equipment System Pressure Gauge

Displays hydraulic system pressure.

Do not exceed 2,500 PSI (172 bar)

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Controls - 34 HT220 Operator’s Manual

Center Console

Drive Controls

1. Cruise Control Switch

2. Sensitivity Control

3. auto - manual switch

4. Ground Drive Speed

5. Steering Control

Item Description Notes

1. Cruise Control Switch To position cruise control to

low, push up. To position cruise control to

medium, pull down. To position cruise control to

high, place in center.

6. Direction Control

7. Radius Control

8. Parking Brake

9. Emergency Engine Stop

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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.

4. Ground Drive Speed To drive in high range, push

up. To drive in low range, pull

down.

5. Steering Control To steer machine left, move

up. To steer machine right, move

down.

6. Direction Control To move machine forward,

move up. To move machine ba ckward,

move down.

Detent lever is normally centered.

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Controls - 36 HT220 Operator’s Manual

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.

8. Parking Brake T o engage br ake, push switch

up. To disengage brake, pull

switch down.

9. Emergency Engine Stop

To stop engine, press button. T o reset emergency stop, turn

switch to the right.

Do not use emergency engine stop to stop engine on a regular basis.

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HT220 Operator’s Manual Controls - 37

Diagnostic Display

1. Enter Key

2. Arrow Keys

Item Description Notes

1. Enter Key To select the highlighted

parameter on the screen, touch the ENTER key.

3. Menu Key

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Controls - 38 HT220 Operator’s Manual

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.

3. Menu Key To enter or exit the menu

screens, press the Menu key.

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HT220 Operator’s Manual Controls - 39

Seat

1. Seat Slide Control

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.

3. Seat belt To fasten, insert latch into

buckle. Adjust until seat belt is low and tight.

To release, lift top of buckle.

3. Seat Belt

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Controls - 40 HT220 Operator’s Manual

Top Console

1. Fan Power Control (three speed)

2. Air Conditioner Power Knob

3. Cab Pressurizer Switch

Item Description Notes

1. Air conditioner power control

To adjust to desired cooling intensity, turn control.

4. Cab Light Switch

5. Alternate Escape Method

6. Windshield Wiper Handle

Ensure that heater valves are turned to the off position, See “Heater Controls” on page 42.

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HT220 Operator’s Manual Controls - 41

Top Console

Item Description Notes

2. Ventilation (fan) power control

3. Cab pressurizer switch To pressurize cab, press

4. Cab light switch To turn cab light on, turn

5. Alternate escape method

6. Windshield wiper handle

To adjust the rate of air flow, turn control.

switch.

switch to the ON position. To turn cab light off, turn

switch to the OFF position. To escape cab in emergency,

use device to break glass. To wipe windshield, move

lever.

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Controls - 42 HT220 Operator’s Manual

Heater Controls

1. Coolant Return Valve 2. Coolant Delivery Valve

Item Description Notes

1. Coolant return valve To turn heater ON, turn valve

inline. T o tur n heater OFF, turn valve

perpendicular.

2. Coolant delivery valve To turn heater ON, turn valve

inline. T o tur n heater OFF, turn valve

perpendicular.

Ensure that air conditioner switch is in the ‘OFF’ position before opening the heater valves.

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HT220 Operator’s Manual Controls - 43

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, rotate counterclockwise.

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Controls - 44 HT220 Operator’s Manual

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.

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HT220 Operator’s Manual Controls - 45

Emergency Stop

Item Description Notes Emergency Engine Stop

Buttons

To stop machine immediately, press button.

To release the stop function, the button must be pulled “out” or twisted clockwise to the “out” position. The switches must be reset in order for the engine to start.

Do not use emergency engine stop to stop engine on a regular basis.

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Controls - 46 HT220 Operator’s Manual

Emergency Stop

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Page 48

HT220 Operator’s Manual Prepare - 47

Prep are

Chapter Contents

Gather Information . . . . . . . . . . . . . . . . . . . . . . . . . 48

• Review Job Plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

• Notify One-Call Services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

• Arrange for Traffic Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

• Plan for Emergency Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

Inspect Site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

• Identify Hazards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

Classify Jobsite. . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

• Inspect Jobsite . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

• Select a Classification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

• Apply Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

Check Supplies and Prepare Equipment . . . . . . . 52

• Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

• Fluid Levels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

• Condition and Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

• Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

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Page 49

Prepare - 48 HT220 Operator’s Manual

Gather Information

A successful job begins before you dig. The first step in planning is reviewing info rmation already available about the job and jobsite.

Review Job Plan

Review blueprints or other plans. Check for information about exi sting or planned stru ctures, elevations, or proposed work that may be taking place at the same time.

Notify One-Call Services

Call area One-Call or similar services and have existing lines located and marked. Call any utilities in your area that do not subscribe to One-Call.

Arrange for Traffic Control

If working near a road or other traffic area, contact local authorities about safety procedures and regulations.

Plan for Emergency Services

Have the telephone numbers for local emergency and medical facilities on hand. Check that you will have access to a telephone.

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Page 50

HT220 Operator’s Manual Prepare - 49

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

• signs of utilities (See “Inspect Jobsite” on page 50.)

•traffic

•access

• soil type and condition

Identify Hazards

Identify safety hazards and classify jobsite. See “Classify Jobsite” on page 50.

Jobsite hazards could cause death or serious injury. Use correct equipment and work methods. Use and maintain proper safety equipment.

NOTICE:

• Wear personal protective equipment including hard hat, safety eye wear, and hearing protection.

• Do not wear jewelry or loose clothing.

• Notify One-Call and companies which do not subscribe to One-Call.

• Comply with all utility notification regulations before digging or drilling.

• Verify location of previously marked underground hazards.

• Mark jobsite clearly and keep spectators away.

Remember, jobsite is classified by hazards in place -- not by line being installed.

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Page 51

Prepare - 50 HT220 Operator’s Manual

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. You should also call any utility companies which do not participate in the One-Call service.

• Inspect jobsite and perimeter for evidence of underground hazards, such as: – “buried utility” notices

– utility facilities without overhead lines – gas or water meters – junction boxes – drop boxes – light poles – manhole covers – sunken ground

• Have an experienced locating equipment operator sweep area within 20’ (6 m) to each side of trench path. Verify previously marked line and cable locations.

• Mark location of all buried utilities and obstructions.

• Classify jobsite.

Select a Classification

Jobsites are classified according to underground hazards present.

If working . . . then classify jobsite as . . .

within 10’ (3 m) of a buried electric line electric within 10’ (3 m) of a natural gas line natural gas in sand, granite, or concrete which is capable of producing

crystalline silica (quartz) dust within 10’ (3 m) of any other hazard other

NOTICE: If you have any doubt about jobsite classification, or if jobsite might contain unmarked hazards, take steps outlined previously to identify hazards and classify jobsite before working.

crystalline silica (quartz) dust

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Page 52

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.

• Have service shut down while work is in progress. Have electric company test lines before returning them to service.

Natural Gas Jobsite Precautions

In addition to positioning equipment upwind from gas lines, use one or both of these methods.

• Expose lines by careful hand digging or soft excavation.

• Have gas shut off while work is in progress. Have gas company test lines before returning them to service.

Crystalline Silica (Quartz) Dust Precautions

Follow OSHA or other guidelines for exposure to crystalline silica when trenching, sawing or drilling through material that might produce dust containing crystalline silica (quartz).

Other Jobsite Precautions

You may need to use different methods to safely avoid other underground hazards. Talk with those knowledgeable about hazards present at each site to determine which precautions should be taken or if job should be attempted.

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Prepare - 52 HT220 Operator’s Manual

Check Supplies and Prepare Equipment

Supplies

•fuel

•keys

• personal protective equipment, such as hard hat and safety glasses

• digging teeth

Fluid Levels

•fuel

• hydraulic fluid

•battery

• engine oil

• transmission fluid

Condition and Function

• digging chain and teeth

•fan belts

• light bulbs

• filters (air, oil, hydraulic)

•tracks

• pumps and motors

• hoses and valves

• signs, guards, and shields

Accessories

Fire Extinguisher

Check fire extinguisher charge regularly.

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HT220 Operator’s Manual Drive - 53

Drive

Chapter Contents

Start Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Shut Down. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

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Drive - 54 HT220 Operator’s Manual

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.

Incorrect procedures could result in death, injury, or property damage.

Learn to use equipment correctly.

NOTICE:

• Read operator’s manual before operating equipment. Follow instructions carefully. Contact your Ditch Witch dealership for operation information or demonstration.

• Wear hard hat, safety glasses, and other protective eq uipm ent r equired by job. Do not wear jewelry or loose clothing that can catch on controls.

Rollover possible. If machine rolls over, you could be thrown from seat

and killed or crushed. Wear seat belt.

1. Fasten and adjust seat belt.

2. Check that all controls are in neutral before starting.

3. Check that parking brake is engaged.

4. Move throttle to half open.

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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.

6. When cold start wait indicator goes off, turn ignition switch all the way clockwise to start tractor. Warning alarm will sound. Indicators will light.

• If engine does not crank, check battery disconnect. See page 43 for battery disconnect

information.

• If engine turns but does not start within 20 seconds, allow starter to cool before trying to start

again.

Improper control function could cause death or serious injury. If control does not work as described in instructions, stop machine and have it serviced.

NOTICE:

• If warning alarm does not sound, have machine repaired.

• Machine will not start if start batteries are disconnected. See page 43 for battery disconnect information.

7. Run engine at half-throttle or less for five minutes before operating tractor. Du ring warm-up, check that all controls work properly.

IMPORTANT: Some operations will not function if any controls are not in the neutral position upon start up. If some functions do not work, turn ignition key to th e off position and ensure that all controls are in the neutral position.

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Drive - 56 HT220 Operator’s Manual

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.

5. Adjust steering control lever to adjust the direction.

6. Change engine speed with throttle.

Moving traffic – hazardous situation. Death or serious injury could result.

Avoid moving vehicles, wear high visibility clothing, post appropriate warning signs.

NOTICE:

• Drive carefully in congested areas. Know machine’s clearance and turning radius.

• Keep attachments low when operating on slope. Drive slowly and cautiously.

Shut Down

1. Move direction control levers to the neutral position.

2. Lower boom to ground.

3. Engage parking brake.

4. Reduce engine speed to a minimum.

5. Wait five minutes for engine to cool down.

6. Turn ignition switch to STOP.

7. Turn off the air conditioner and the lights, if on.

8. If leaving the machine unattended, remove key and lock the following: cab window, door, engine compartment doors, tool compartment door and the tank locking caps.

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HT220 Operator’s Manual Drive - 57

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.

4. Start the machine by following the standard procedure. See “Start Unit” on page 54..

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Drive - 58 HT220 Operator’s Manual

Start After Emergency Stop

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HT220 Operator’s Manual Transport - 59

Transport

Chapter Contents

Lift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

• Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

• Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61

Tie Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

• Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

• Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

Haul . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

• Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

Tow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

• Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

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Transport - 60 HT220 Operator’s Manual

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.

Points

Lifting points are identified by lifting decals. Lifting at other points is unsafe and can damage machinery.

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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).

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Page 63

Transport - 62 HT220 Operator’s Manual

Tie Do wn

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.

Procedure

Attach chains at front and rear tiedown points. Make sure chains are tight before transporting unit. Lower boom and tie down.

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Page 64

HT220 Operator’s Manual Transport - 63

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.

• Attach trailer to tow vehicle before loading or unloading.

• Park, load, and unload trailer on level ground.

• Check that unit and trailer do not exceed size or weight regulations.

• Ensure that tow vehicle has proper tow capacity rating.

Procedure

Refer to trailer owner’s manual and local and regional laws for correct hauling procedures.

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.

• Load and unload trailer on level ground.

• Put manual transmission into first or reverse gear or automatic transmission into park. Turn off ignition. Set parking brake.

• Block trailer wheels.

• Incorrect loading can cause trailer swaying.

and killed or crushed. Wear seat belt.

Rollover possible. If machine rolls over, you could be thrown from seat

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Transport - 64 HT220 Operator’s Manual

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.

6. Engage parking brake.

7. Lower attachments to trailer bed and turn tractor off. See page 56 for proper shutdown procedures.

8. Attach chains to tractor and attachments where tiedown decals are located. See page 62.

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.

• Load and unload trailer on level ground.

• Put manual transmission into first or reverse gear or automatic transmission into park. Turn off ignition. Set parking brake.

• Block trailer wheels.

• Incorrect loading can cause trailer swaying.

Rollover possible. If machine rolls over, you could be thrown from seat

and killed or crushed. Wear seat belt.

1. Lower trailer or ramps.

2. Remove chains from tiedowns.

3. Fasten and adjust seat belt.

4. Start tractor. See page 54 for proper start-up procedures.

5. Raise trencher boom, but keep it low.

6. Disengage parking brake.

7. Use speed/direction control to slowly back unit down trailer or ramps.

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Page 66

HT220 Operator’s Manual Transport - 65

Tow

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).

• Tow at less than 3 mph (4.8 km/h).

• Use maximum towing force of 1.5 times unit weight.

Procedure

Learn to use equipment correctly.

Connect Tow Cables

1. Connect the tow cables or chains to the eyes on the front of the undercarriage.

2. Clevis pins (1,2) may be added to the eyes to aid in the lining up of cables or chains.

Incorrect procedures could result in death, injury, or property damage.

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Page 67

Transport - 66 HT220 Operator’s Manual

Tow

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. Do not exceed 3 mph (4.8 km/hr).

Disconnect Brakes

1. Block tracks to immobilize unit.

2. Disconnect the hydraulic brake hoses and cap the valve to keep contaminants out.

3. Connect a tee between the two disconnected hoses to provide equal pressur e to each gearbox.

4. Connect a hand pump containing hydraulic fluid to the tee.

5. Pump to 500 psi but do not exceed 500 psi. This will release the brake.

Remove Ground Drive Motors

1. Remove the ground drive motor plates and unbolt the ground drive motor. Do not remove the hydraulic hoses. Support the motors by placing them on the lower support or by tying them up. Do not let them drag on the ground.

2. Tow machine slowly.

3. When towing is complete, reattach the brake line and motors so that the machine will not move after disconnecting.

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HT220 Operator’s Manual Trench - 67

Trench

Chapter Contents

Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Operating Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

• Trenching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71

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Trench - 68 HT220 Operator’s Manual

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. Use and maintain proper safety equipment.

NOTICE: Comply with all utility notification regulations before digging or drilling.

Incorrect procedures can result in death, injury, or property damage.

Learn to use equipment correctly.

1. Fasten and adjust seat belt.

2. Start tractor. See page 48 for start-up procedures.

3. Drive to starting point. Move in line with planned trench.

4. Push throttle to low.

5. Lower boom to just above ground.

6. Engage parking brake.

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HT220 Operator’s Manual Trench - 69

Operation

Jobsite hazards could cause death or seriou s 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. Use respirator, water spray or other means to control dust. Silica dust can cause lung disease and is known to the State of California to cause cancer.

Electrical shock. Contacting electrical lines will cause death or serious

injury . Know location of lines and stay away. NOTICE: Cutting high voltage cable can cause electrocu tion. Expose lines by hand befo re

digging.

Incorrect procedures could result in death, injury, or property damage.

Learn to use equipment correctly.

NOTICE:

• Comply with all utility notification regulations before digging or drilling.

• Notify companies that do not subscribe to One-Call.

Flying objects thrown by machine may strike people. Wear hard hat and

safety glasses.

Moving digging teeth will cause death or serious injury. Stay away.

NOTICE:

• Ensure parking brake is engaged.

• Machine might jerk when digging starts. Allow 3’ (1 m) between digging teeth and obstacle.

• Keep everyone at least 15’ (5 m) from machine, at tachments, and thei r ra ng e of mov eme nt .

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Page 71

Trench - 70 HT220 Operator’s Manual

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. Make sure it does not get caught in the trench for any reason and the shoe is free to slide on its support.

3. Place the chain operation control in the forward direction (or digging direction) at the desired speed.

4. Slowly lower the digging boom taking care not to stall the digging chain.

5. Release the parking brake.

6. Adjust the direction control lever to move the machine forward.

7. Ensure that the pressure values on the chain and track circuit pressure gauges do not exceed the maximum values. See “Gauges” on page 31.

8. After digging enough space for the trench cleaner, lower it.

Note: When digging on slopes, it might be necessary to set the parking brake until the trencher reaches the desired digging depth. Under such circumstances, release the parking brake before operating the direction control.

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HT220 Operator’s Manual Trench - 71

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.

• A shorter turn may be made with the digging boom at full depth. Take care to prevent excessive side load.

• If an object becomes lodged in the digging chain:

• Move speed/direction control to neutral.

• Raise boom slightly to clear bottom of trench.

• Move transmission lever to reverse.

• Chain should reverse and release object.

• When cutting across asphalt roads, start trench in soil at the edge of the road and dig trench with shortest possible boom at full depth.

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Page 73

Trench - 72 HT220 Operator’s Manual

Operating Tips

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Page 74

HT220 Operator’s Manual Systems and Equipment - 73

Systems and Equipment

Chapter Contents

Chain, Teeth, and Sprockets . . . . . . . . . . . . . . . . . 74

• Chain and Tooth Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74

• Chain Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74

• Chain Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

Optional Equipment . . . . . . . . . . . . . . . . . . . . . . . . 76

• Tractor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76

• Trencher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76

Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

• Display of Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77

• Reading Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77

• Error Message List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77

• Engine Failure Code List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80

• Determining Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88

• Irregular Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90

Page 75

Systems and Equipment - 74 HT220 Operator’s Manual

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.

• Keep digging teeth sharp. Using dull, worn teeth will decrease production and increase shock load to other trencher components. It can also cause chain stretch, which leads to premature chain wear and failure.

• Maintain the proper amount of tension on the digging chain. Overtightening will cause chain stretch and loss of machine performance. For correct tightening procedure, see page 112.

• 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 Features

4-pitch standard chain 2-pitch more teeth for smoother cuttin g alternating side bar prevents spoil compaction on chain bolt-on adapters allow easy configuration changes Shark Chain II versatile, virtually maintenance-fr ee combination provides pick and shovel effect

Page 76

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.

• 1 = best

• 2 = better

• 3 = good

• 4 = not recommended

Chain Sandy

Soil

4-pitch cup tooth 3 1 2 3 4 1 2-pitch cup tooth 2 3 1 1 3 4 bolt-on adaptor, 2-pitch 4 4 3 2 1 4 bolt-on adaptor/cup tooth

combo Shark Chain II 432114 alternating side bar 4 4 4 4 4 1

Soil Description

sandy soil sugar sand, blow sand, or other soils where sand is the predominant component soft soil sandy loam medium soil loams, loamy clays hard soil packed clays, gumbo, all compacted soils

432124

Soft Soil Medium

Soil

Hard Soil Rocky

Soil

Sticky

Soil

rocky soil chunk rock, glacial till, cobble, rip rap, gravel sticky soil gumbo, sticky clays

Page 77

Systems and Equipment - 76 HT220 Operator’s Manual

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

truck conveyor p/n 140-1081 carbide bit p/n 135-1015 spade bit p/n 135-1016

trench cleaners

restraint bar p/n 140-1073 4’, 6’ (1.2, 1.8 m) depth p/n 140-1074 8’ (2.4 m) depth p/n 140-1075 4’ (1.2 m) double chain p/n 140-1069 6’ (1.8 m) double chain p/n 140-1071 truck conveyor p/n 140-1081

trench cleaner shoes

shoe cleaner (12”) p/n 140-1076 shoe cleaner (14”) p/n 140-1077 shoe cleaner (16”) p/n 140-1078 shoe cleaner (18”) p/n 140-1079 shoe cleaner (24”) p/n 140-1080

Page 78

HT220 Operator’s Manual Systems and Equipment - 77

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. If there are no messages, then “No errors” will be displayed. To go back to the main menu, press the <ESC> key.

Error Message List

Sol. Lft. Forw Short circuit/

Sol. Lft. Backw

Sol. Rgt. Forw

Sol. Rgt. Backw

Failure Type Function Affect ed Error

interrupted cable or solenoid

Short circuit/ interrupted cable or solenoid

Left track pump solenoid forward

Left track pump solenoid backward

Right track pump solenoid forward

Right track pump solenoid backward

Effect Warning Light

Yes The forward drive is blocked.

The brakes are set. (Reset by

positioning the steering and

direction levers in central

position) Y es The backward drive is blocked.

The brakes are set. (Reset by

positioning the steering and

direction levers in central

position) Yes The forward drive is blocked.

The brakes are set. (Reset by

positioning the steering and

direction levers in central

position) Y es The backward drive is blocked.

The brakes are set. (Reset by

positioning the steering and

direction levers in central

position)

Sol. Motor Lft.

Short circuit/ interrupted cable or solenoid

Left track motor solenoid

Yes Slow speed selected. Drive

and digging possible. (Reset

by positioning the steering and

direction levers in central

position)

Page 79

Systems and Equipment - 78 HT220 Operator’s Manual

Diagnostics

Error Message List

Sol. Motor Rgt

Sol. chain forw

Sol. chain backw

Steer. Pot. joys

Driv. Pot. Joys

Failure Type Function Affect ed Error

Warning Light

Short circuit/ interrupted cable or solenoid

Short circuit/ interrupted cable or potentiometer

short circuit / interrupted cable or potentiometer

Chain pump solenoid forward

Chain pump solenoid backward

Steering lever potentiometer

Direction lever potentiometer

Y es Slow speed inserted Drive and

Y es Forward chain rotation locked.

Yes Backward chain rotation

Yes Drive locked. The brakes are

Effect

digging possible. (Reset by

positioning the steering and

direction levers in central

position)

(Reset by positioning the chain

lever in central position)

locked. (Reset by positioning

the chain lever in central

position)

inserted (Reset by positioning

the steering and direction

levers in central position)

inserted (Reset by positioning

the steering and direction

levers in central position)

Driving Sw. Both selectors ‘on’ /

Both selectors ‘off’ with the lever not in zero position

Steering Sw. Both selectors ‘on’ /

Both selectors ‘off’ with the lever not in zero position

Chain Pot. Joyst

Chain Sw. Both selectors ‘on’ /

Sensitiv. Press.

Short circuit/ interrupted cable or potentiometer

both selectors ‘off’ with the lever not in zero position

Short circuit / interrupted cable or potentiometer

Direction lever selectors

Steering lever selectors

Chain lever potentiometer

Chain lever selectors Yes Chain rotation is locked.

‘Automatic steering sensitivity’ potentiometer

Yes Drive locked. The brakes are

inserted. (Reset by positioning

the steering and direction

levers in central position) Yes Drive locked. The brakes are

inserted. (Reset by positioning

the steering and direction

levers in central position) Yes Chain rotation locked. (Reset

by positioning the chain lever

in central position)

(Reset by positioning the chain

lever in central position)

Y es Automatic steering set on 300

bar pressure. (Reset by

positioning the chain lever in

central position)

Page 80

HT220 Operator’s Manual Systems and Equipment - 79

Diagnostics

Error Message List

Fine Steer. Pot.

Fine Steer. Off

Engine Speed

Mot Speed Right

Failure Type Function Affect ed Error

Warning Light

Short circuit / interrupted cable or potentiometer

Diesel engine off / short circuit - cable or sensor interrupted / sensor out-of-adjustment

+24V failure / short circuit - cable or sensor interrupted / sensor out-ofadjustment

‘Fine steering’ potentiometer

Diesel speed sensor Yes Engine load control system

Speed sensor of rig ht track motor speed

Y es Drive locked. After bringin g the

Yes System for straight running

Effect

direction lever back to centre:

the warning light blinks; driving

is possible; the potentiometer

is cut off. (Reset by positioning

the steering and direction

levers in central position)

This message appears to

indicate the cutting off of the

fine steering potentiometer

after a failure and the ensuing

reset (See previous point)

disconnected Driving and

digging possible. (Reset by

positioning the steering and

direction levers in central

position)

control disconnected. Driving

and digging possible (Reset

when the signal is OK)

Mot Speed Left

Standard condition

Master/ Slave int

Low Voltage <24 Volt current: Battery or generator

Parking brake

+24V failure / short circuit - cable or sensor interrupted / sensor out-ofadjustment

On panel switching on, direction or steering or chain lever not centered

A52 or B52 interrupted. Internal connection to Microcontroller faulty

Selector open or cable interrupted

Speed sensor of left track motor speed

Condition of levers centered from start

failure Brake selector

inserted.

Yes System for straight running

control disconnected. Driving

and digging possible (Reset

when the signal is OK)

Y es Chain and track drives locked.

(Reset by repositioning all

levers in central position)

Check that the A52 cable is

connected to ground and that

the B52 cable is connected to

+24. Replace the

Microcontroller. No Error displayed on BB3 only.

Yes Driving blocked. Brakes

inserted.

Page 81

Systems and Equipment - 80 HT220 Operator’s Manual

Diagnostics

Error Message List

Seat Switch Operator not

Oil Press. Eng.

Temperat. Eng.

Oil Level Hydrau

Suction Pressure

Failure Type Function Affect ed Error

seated / seat switch faulty or cable interrupted

Engine oil pressure insufficient / cable or sensor short circuit

Engine water overheating / cable or sensor short circuit

Hydraulic oil level low / cable or sensor short circuit

Cock proximity sensors faulty / cocks closed / cable short circuit

Effect Warning Light

Seat switch open Yes The diesel engine stalls in 5

seconds. The starter does not

run.

Diesel engine oil pressure gauge

Diesel engine coolant thermocouple

Hydraulic oil level float

Hydraulic circuit cocks

Yes The diesel engine stalls in 10

seconds.

Yes Hydraulic drives

disconnected. If this lasts for

more than 20 seconds, the

diesel engine stalls. The

starter does not run. Yes The diesel engine stalls in 10

seconds.

Yes The diesel engine stalls. The

starter does not run.

Time Limit Rental

Bus Error Signal interruption

Rental scheduled time expired

Display can-bus

Digging chain drive Yes Digging chain drive

No signalling on display

Engine Failure Code List

Failure Code Warning Light

111 Yellow Internal error of the controller

115 Yellow No positio ning sign al or en gine r pm

122 Yellow High voltage from the turbo pressure

Cause Effect (only when the failure code is active)

hardware

signal has been detected.

sensor signal has been detected on pin 45 of the engine connector

disconnected. (Reset by

bringing the chain lever back in

central position and insert a

new time limit via the BB3)

Check FUS13, resistor RR1

and connections A26 - A27

Probably no effect or irregular working or engine ignition failure.

Reduced engine output or white smoke.

The engine output will be reduced to a nonsupercharging rpm.

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HT220 Operator’s Manual Systems and Equipment - 81

Diagnostics

Failure Code Warning Light

123 Y ellow Low voltage from the turbo pressure

131 Y ellow Low voltage from the turbo pressure

132 Yellow Low voltage from the accelerator

133 Yellow High voltage on the accelerator

134 Yellow Low voltage on the accelerator

135 Yellow High voltage from the oil pressure

Cause Effect (only when the failure code is active)

sensor signal has been detected on pin 45 of the engine connector

position signal has been detected on pin 30 of the OEM connector.

signal has been detected. Remote on pin 9 of the OEM connector.

sensor signal has been detected on pin 33 of the engine connector.

The engine output will be reduced to a nonsupercharging rpm.

The engine will remain idle when the pedal is released; the engine will keep a stable rpm when the accelerator is pressed.

The engine will not respond to the remote accelerator impulses.

The controller will use a default pressure value and the oil pressure engine protection will be missing.

141 Yellow Low voltage from the oil pressure

sensor signal has been detected on pin 33 of the engine connector.

143 Yellow The signal of low oil pressure

indicates that the oil pressure is lower than the minimum level for engine protection.

144 Yellow High voltage from the coolant

temperature signal has been detected in pin 23 of the engine connector.

145 Yellow Low voltage from the temperature

signal has been detected in pin 23 of the engine connector.

146 Yellow The signal of coolant temperature

indicates that the minimum level for engine protection has been reached.

151 Red The signal of coolant temperature

indicates that the maximum level for engine protection has been reached.

The controller will use a default pressure value and the oil pressure engine protection will be missing.

Possibility of output reduction or engine stall if this has been enabled while programming the controller.

The controller will use a default temperature value and the coolant temperature engine protection will be missing.

Possibility of output reduction or engine stall if this has been enabled while programming the controller.

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Systems and Equipment - 82 HT220 Operator’s Manual

Diagnostics

Failure Code Warning Light

153 Yellow High voltage from the suction

154 Yellow Low voltage from the suction

155 Red The suction manifold temperature

191 The activation signal of th e air

234 Red The overspeed signal indicates that

Cause Effect (only when the failure code is active)

manifold temperature signal has been detected on pin 34 of the engine connector.

signal indicates that the temperature is above the maximum temperature for engine protection

conditioning clutch indicates a short circuit when on.

the maximum speed allowed for the engine has been reached.

The controller will use a default temperature value and the manifold temper at ur e en gine protection will be missing.

Possibility of output reduction or engine stall if this has been enabled while programming the controller.

Air conditioning cannot be turned on.

Gas oil will be cut off to injectors until speed is reduced.

235 Maintenance

241 Yellow The machine speed signals have

242 Yellow Invalid or inadequate signal on pins

243 Error detected in the engine brake

245 Error detected in the fan clutch

261 Yellow The VP44 pump control module

264 Yellow Low or high voltage detected in the

A low coolant level signal has been detected on pin 37 of the engine connector.

been lost on pins 8 and 18 of the OEM connector.

8 and 18 of the OEM connector indicating connections or tampering.

enabling circuit relay on pin 42 of the engine connector.

enabling circuit relay on pin 31 of the engine connector.

indicates that the gas oil temperature has reached the maximum protection level.

gas oil temperature signal of the VP44 pump control module.

Possibility of output reduction or engine stall if this has been enabled while programming the controller.

Engine rpm is limited to the maximum without the machine speed sensor.

Engine rpm is limited to the maximum speed without the machine speed sensor.

The engine brake does not work.

The engine controller cannot control the fan working. The fan will remain on or off.

The engine output will be reduced.

Default value for the gas oil temperature and possible low output.

Page 84

HT220 Operator’s Manual Systems and Equipment - 83

Diagnostics

Failure Code Warning Light

278 Yellow Error detected in the AC pump circuit

283 Yellow High voltage from the engine speed

284 Yellow Low voltage from the engine speed

297 Yellow High voltage from the OEM pressure

298 Yellow Low voltage from the OEM pressure

319 M Voltage to the real timer has been cut

Cause Effect (only when the failure code is active)

on pin 11 of the engine connector.

and position sensor has been detected on pin 8 of the engine connector.

signal has been detected on pin 48 of the engine connector.

off and its settings are no longer valid.

Possible low output; the engine might stall, malfunction or start with difficulty.

The controller will use the VP44 pump speed signal as back-up. Possibility of white smoke and output drop.

Default value for the OEM pressure. Loss of OEM pressure control.

The controller time values are no longer reliable.

349 Yellow The auxiliary device speed signal on

pins 8 and 18 is excessive with respect to the controller limits.

352 Yellow Low voltage from the engine position

sensor has been detected on pin 10 of +5 VDC power supply of the engine connector (engine harness).

361 Red High voltage detected in the VP44

pump control valve.

362 Yellow Low or no voltage is detected on the

VP44 pump control valve.

363 Yellow No valve movement has been

detected by the VP44 pump controller.

364 Yellow No communication between the

pump collector and the motor controller has been detected.

365 Yellow Low voltage in the supply circuit of

the VP44 pump controller is overrange between 6 and 24 VDC.

Speed control loss of auxiliary device.

Default values for the sensors connected to this power supply. The engine will drop to a nonsupercharged rpm with consequent protection loss due to low oil pressure, low suction manifold pressure and ambient pressure.

Gas oil supply to the engine is cut off and the engine stalls.

The engine will loose power and tend to stall.

Possibility of output drop.

The engine will turn at a stable rpm when the pedal is released.

The engine will lose power and tend to stall.

Page 85

Systems and Equipment - 84 HT220 Operator’s Manual

Diagnostics

Failure Code Warning Light

368 Yellow The VP44 pump is not timed as

369 Yellow The VP44 pump is not timed as

372 Yellow The VP44 pump controller detects a

373 Red High voltage on the VP44 pump

374 Yellow The VP44 pump controller has

375 Yellow The controller is controlling some

Cause Effect (only when the failure code is active)

requested by the engine controller.

continuous voltage on the minimum selection pin 16 of the engine connector or the control ler detects an open circuit or an grounded short circuit on the minimum selection pin 16 of the engine connector.

electrostop has been detected on pin 6 of the engine connector.

detected an internal error.

gas oil metering and timing values but the pump controller does not input them.

Serious output drop.

Serious output drop and possible white smoke.

If communication is lost between the pump controller and the engine controller, the engine will run at an rpm slightly above the minimum rpm, independently of the pedal position.

The injectors do not receive gas oil and the engine stalls.

Possibilities vary from power loss to engine stall.

No effects possible or the engin e will drop a little output.

376 Red No calibration in the VP44 pump

controller.

377 Yellow The pump controller does not stop

after turning off the ignition key that switches off the engine controller.

381 Yellow Error detected in pre-heater 1 circuit

on pin 41 of the engine connector.

382 Yellow Error detected in pre-heater 2 circuit

on pin 41 of the OEM connector.

385 Yellow High voltage has been detected on

the +5 VDC signal OEM sensor of the OEM connector.

386 Yellow High voltage on the position sensor

circuit has been detected on pin 10 of the engine connector.

The injectors do not receive gas oil and the engine stalls.

Batteries run down if the machine is not opera ted for long periods.

The pre-heater cannot be operated by the controller; possibility of white smoke and starting difficulty.

Sensors connected to this pin will not work.

A default value is used for sensors connected to this pin. The engine will drop to a nonsupercharging rpm with consequent protection loss due to low oil pressure, low suction manifold pressure and ambient pressure.

Page 86

HT220 Operator’s Manual Systems and Equipment - 85

Diagnostics

Failure Code Warning Light

387 Yellow High voltage has been detected on

391 Yellow Error detected in the power supply

415 Red The low oil level signal indicates that

418 WIF The gas oil water sensor indicates

422 Yellow Voltage has been simultaneously

Cause Effect (only when the failure code is active)

the accelerator position circuit on +5 VDC power supply pin 10 of the engine connector.

enabling circuit on pin 42 of the engine connector.

the level is below the engine protection limit.

that the filter needs to be purged.

detected on both pin 27 and 37 of high and low refrigeration level on the engine connector, or no voltage has been detected on either pins.

No signal of engine performance or the engine might not be running.

Speed reduction and possibility of engine stall.

Excess of water quantity in gas oil may damage the injection system seriously . Protection loss for low refrigeration level.

Excess of water quantity in the gas oil may damage the injection system seriously. Protection loss for low refrigeration level.

429 Yellow Low voltage from the WIF sensor

signal has been detected on pin 40 of the OEM connector.

431 Yellow The minimum validity signal on pins

25 and 26 of the OEM connector indicates that concurrent voltage has been detected on both pins (open circuit).

432 Yellow The minimum validity signal on pins

25 and 26 of the OEM connector indicates that concurrent voltage has been detected on both pins (open circuit).

433 Yellow The turbo-charge pressure signal

indicates that pressure is high while the other parameters (e.g. rpm and load) indicate that pressure should be low.

434 Yellow The controller power supply is below

6 VDC for a split second or the controller has not been disconnected (keep the batteries connected for at least 30 seconds before disconnecting them).

Protection loss due to water in gas oil.

No effect on performance but minimum signal loss.

Possible error of excessive gas oil metering, therefore excessive black smoke.

No output drop or the engine might tend to stall or difficulty in starting. Traveling, maintenance and time information might not be accurate.

Page 87

Systems and Equipment - 86 HT220 Operator’s Manual

Diagnostics

Failure Code Warning Light

441 Yellow Voltage has been detected on the

442 Yellow Voltage has been detected on the

443 Y ellow Low voltage from the pedal position

444 Yellow Low voltage on the OEM +5 VDC

Cause Effect (only when the failure code is active)

controller power supply on pins 38, 39 and 40 of the engine connector; this indicates that the power supply voltage has gone below 5 VDC.

controller power supply on pins 38, 39 and 40 of the engine connector; this indicates that the power supply voltage has risen above the system voltage.

sensor has been detected on +5 VDC pin 29 of the OEM connector.

sensor connector has been detected that supplies pin 10 on the OEM connector.

The engine stalls or runs irregularly.

No effect on performance.

The engine runs idle when the switch indicates the minimum rpm and revs up (preset value by default) when the minimum switch displays an off-minimum signal.

Sensors connected to this +5 VDC power supply will not work.

488 Yellow The suction manifold temperature

signal indicates that temperature is above the minimum limit for engine protection.

489 Yellow The speed signal of the auxiliary

device connected to pins 8 and 18 of OEM connector are out of scale with respect to the engine controller scale.

515 Yellow High voltage has been detected on

the coolant level signal +5 VDC power supply pin 49 of the engine connector.

516 Yellow Low voltage has been detected on

the coolant level signal +5 VDC power supply pin 49 of the engine connector.

517 Yellow The VP44 pump controller has

detected a jammed gas oil metering valve.

524 Yellow An error has been detected in the

High Speed Droop switch on pin 24 of the engine connector.

Possibility of output reduction or engine stall if this has been enabled while programming the controller.

Speed control loss of the auxiliary device.

No engine protection for coolant level.

The engine might stall.

The operator cannot select the H.S.D. alternatives. The standard droop will be used.

Page 88

HT220 Operator’s Manual Systems and Equipment - 87

Diagnostics

Failure Code Warning Light

527 Yellow An error has been detected in the

528 Yellow An error has been detected in the

529 Yellow An error has been detected in the

551 Yellow The validity signals on engine

599 Yellow The need to turn the engine off has

661 The controller has found that the

Cause Effect (only when the failure code is active)

Dual Output Driver “A” pin 5 circuit of the OEM connector.

torque curve selection switch pin 39 of the OEM connector.

Dual Output Driver “B” pin 21 circuit of the OEM connector.

minimum on pins 25 and 26 indicate that there is no voltage on either pins.

been detected in the customized calibration Dual Output option, owing to sensor readings or OEM signals.

engine is going to stall due to protection or that it has been turned off when under load.

The Dual Output Driver “A” - controlled device will not work properly.

The operator cannot select the torque alternative curves. The standard curve will be used.

The Dual Output Driver “B” - controlled device will not work properly.

The engine will run in idle mode.

The engine will be turned off.

No Effect.

768 Yellow Error detected in modulation signal

on pin 41 transmission of the OEM connector

Transmission cannot be controlled.

Page 89

Systems and Equipment - 88 HT220 Operator’s Manual

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.

2. The warning light indicates a precaution or situation that does not seriously affect engine safety. This warning light is orange or yellow.

3. The STOP warning light indicates a problem that may ap pear ser i ous; in th is ca se th e en gin e must be stopped immediately. This warning light is red.

4. The MAINTENANCE warning light signals that the engine needs maintenance (change of filters or oil, etc.). This warning light is typically blue. NB.

When the ignition key is turned (instrument panel on) all warning lights light up, and then go off one by one. In case there is an active code, the (yellow) warning light will or the (red) engine stop light or both will

remain on, owing to the current code typology. To understand what error code is currently being dealt with, the diagnosis switch must be on the “ON”

position (with the engine off and the instrument panel on). At this point, the (yellow and red) diagnostic lights will send out a series of blinks. For instance: the 244 error code is active. The diagnostic lights will blink like this:

WARNING-STOP-STOP-PAUSE--STOP-STOP-STOP-STOP-PAUSE-STOP-STOP-STOP-STOP-WARNING

1 2 4 4 1

To define the failure code count how many times the (STOP) red warning light blinks. To pass a subsequent code you must:

1. Press the accelerator pedal completely down or

2. Press the switch that increases and decreases the engine idle rpm, typically identified by a pushbutton with the following coding “+/-” SELECTOR F.

The maintenance warning light usually lights up every 250 engine running hours. When resetting the warning light after completing the maintenance the procedure described hereunder must be followed in order to put out the warning light.

With stalled engine and energized instrument panel:

1. Diagnostic switch on “ON” SELECTOR G

2. Press the accelerator pedal down for three seconds, then release it.

3. Press the accelerator pedal quickly and then release it twice.

4. Press the pedal down for more than three seconds and then release.

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 essential for the engine reliability and durability.

Page 91

Systems and Equipment - 90 HT220 Operator’s Manual

Diagnostics

Irregular Functions

Retroactive System for Straight Running Control

The straight running control system compares the lev er-controlled steering or the fine steering knob with the signals emitted by the sensors placed on both hydr aulic motors of the tr acks. Retroaction is carri ed out by adjusting the piston displacement of the track pumps. This enables th e unit to follow straight line trajectories as well as constant-radius steering accurately.

If one of the two tracks starts skidding, the system is unable to work correctly. If one of the two track sensors is faulty, one of the following error messages is displayed: "Mot. Speed Left"

or "Mot. Speed Right" and the retroactive system for straight running control halts automatically, thus enabling the machine operation in 'manual' mode.

Activation or deactivation of such system can be carried out by means of proper panel selector.

Steering Warning Lights

Green warning light: centering of fine steering knob. It lights up if the fine steering knob is not in central position. It is useful for initial adjustment and knob

operating test. Such lighting up is standard while the machine is in operation. Signalling does not vary, independently of the connection or disconnection of the ("Manual"/"Automatic")

digging function or of the activation or deactivation of the track drive. Yellow warning light: steering adjustment. Lighting up of this warning light signals the intervention of the steering control retroactive system for

adjusting the track speeds according to the settings given by operating the lever or the steering potentiometer.

Such lighting up is standard when the machine is in operation. As shifting the forward running control is necessary for moving the tracks, such a warning light does not

light up if the steering lever is not shifted from the central position. If the digging switch is in 'manual' position, the fine steering potentiometer is disabled. Therefore operating

the knob does not cause the warning light to light up. On the contrary, the stee ring lever is active and therefore it controls both the machine steering and the warning light (peculiar cases excepted).

If the digging switch is in 'automatic' position, the fine steering potentiometer is enabled. Therefore operating the steering potentiometer controls both the machine steering and the warning light (peculiar cases excepted). The steering lever is active too but, contrary to the potentiometer, operating it causes the temporary disconnection of the steering control retroactive system. For such reason it does not cause the warning light to light up.

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 r pm 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.

When automatic digging is selected, the diesel engine speed must be over 2000 rpm for the tracks to move.

If the engine rpm sensor is broken, the error message 'Engine Speed' appears on the display and the engine load control is disconnected automatically, thus enabling the machine operation in 'manual' mode.

Load Control on Digging Chain Circuit Pressure

If a pressure transducer is connected to the closed circuit of the digging chain, the system is able to sense the resistance put up by the excavated ground through the circuit pressure increase. Such a system can be activated by turning the automatic digging selecto r and intervenes on th e track drive, thus slowing down the machine forward speed in case of overload.

The sensitivity control potentiometer enables to increase or decrease the reference pressure value (this variable can be displayed by using the "F4 Status\L2\Set Press" function) and therefore the operating pressure.

In case of failure of the sensitivity potentiometer, the error message "Sensitiv. Press" appears on the display and the circuit pressure load control of the digging chain is automatically set at 300 bar.

Page 93

Systems and Equipment - 92 HT220 Operator’s Manual

Diagnostics

Page 94

HT220 Operator’s Manual Complete the Job - 93

Complete the Job

Chapter Contents

Rinse Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Stow Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

CMW

Page 95

Complete the Job - 94 HT220 Operator’s Manual

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.

CMW

Page 96

HT220 Operator’s Manual Service - 95

Service

Chapter Contents

Service Precautions . . . . . . . . . . . . . . . . . . . . . . . . 96

Lubrication Overview . . . . . . . . . . . . . . . . . . . . . . . 97

Recommended Lubricants/Service Key . . . . . . . . 99

• Engine Oil Selection Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100

4 Hour . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

10 Hour . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

50 Hour . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

100 Hour . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

250 Hour . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

500 Hour . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

1000 Hour . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

1500 Hour . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

As Needed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

Page 97

Service - 96 HT220 Operator’s Manual

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.

• Before servicing equipment, lower unstowed attachments to ground.

Welding Precaution

NOTICE: Welding can damage electronics.

• Disconnect battery at battery disconnect switch before welding to prevent damage to battery. Do not turn off battery disconnect switch with engi ne run n i ng or alternator and other electronic devices may be damaged.

• Connect welder ground clamp close to welding point and make sure no electronic components are in the ground path.

• Always disconnect the ECU ground connection from the frame, harness connections to the ECU, and other electronic components prior to welding on machine or attachments.

Cleaning Precaution

NOTICE: When cleaning equipment, do not spray electrical components with water.

Page 98

HT220 Operator’s Manual Service - 97

Lubrication Overview

Lubrication Overview (left)

Page 99

Service - 98 HT220 Operator’s Manual

Lubrication Overview

Lubrication Overview (right)

Page 100

HT220 Operator’s Manual Service - 99

Recommended Lubricants/Service Key

Item Description

DEO Diesel engine oil meeting API service classification CF-4 or E1-96 and SAE viscosity

recommended by engine manufacturer (SAE 15W40)

MPG Multipurpose grease meeting ASTM D217 and NLGI 5

MPL Multipurpose gear oil meeting API service classification GL-5 (SAE 80W90)

THF Tractor hydraulic fluid, similar to Phillips 66 HG, Mobilfluid 423, Chevron Tractor

Hydraulic Fluid, Texaco TDH Oil, or equivalent Check level of fluid or lubricant

Check condition

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 requirement s. In extreme conditions, service machine more frequently. Use only recommended lubricants. Fill to capacities listed in “Specifications” on page 117.

For more information on engine lubrication and maintenance, see your Cummins

NOTICE:

• Use only genuine Ditch Witch parts, filters, approved lubricants, TJC, and approved coolants to maintain warranty.

• Use the “Service Record” on page 143 to record all required service to your machine.

engine manual.