Ditch Witch ST37x Operator's Manual
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Ditch Witch ST37x Operator's Manual

Ditch Witch ST37x Operator's Manual

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ST37x
Operator's
Manual
Issue 1.0
053-2977
Original Instruction

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Summary of Contents for Ditch Witch ST37x

  • Page 1 ST37x Operator’s Manual Issue 1.0 053-2977 Original Instruction...

  • Page 2: Table Of Contents

    ST37x Operator’s Manual Overview - 1 Overview Chapter Contents Serial Number Location ..... . 2 Intended Use ....... 2 Equipment Modification .

  • Page 3: Serial Number Location

    Intended Use The ST37x is a platform, rubber track trencher designed for light-to medium-duty construction work. 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.

  • Page 4: Equipment Modification

    ST37x Operator’s Manual Overview - 3 Equipment Modification Equipment Modification This equipment was designed and built in accordance with applicable standards and regulations. Modification of equipment could mean that it will no longer meet regulations and may not function properly or in accordance with the operating instructions.

  • Page 5: Operator Orientation

    ST37x Operator’s Manual Overview - 4 Operator Orientation Operator Orientation 1. Front of unit 2. Right side of unit 3. Rear of unit 4. Left side of unit t54om004h.eps t54om004h.eps About This Manual This manual contains information for the proper use of this machine. See the beige Operation Overview pages for basic operating procedures.

  • Page 6: Foreword

    If you sell your equipment, be sure to give this manual to the new owner. If you need a replacement copy, contact your Ditch Witch dealer. If you need assistance in locating a dealer, visit our website at www.ditchwitch.com or write to the following address: The Charles Machine Works, Inc.
  • Page 7 Issue number 1.0 / OM-12/16 Part number 053-2977 Copyright 2016 by The Charles Machine Works, Inc. and Ditch Witch are registered trademarks of The Charles Machine Works, Inc. This product and its use may be covered by one or more patents at http://patents.charlesmachine.works.
  • Page 8 ST37x 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 ST37x Operator’s Manual Contents - 8 Service Record a record of major service performed on the machine Appendix ® additional information about Ditch Witch equipment...

  • Page 10: Safety

    ST37x Operator’s Manual Safety - 9 Safety Chapter Contents Guidelines ....... . 10 California Proposition 65 Warning .

  • Page 11: Guidelines

    • Fully inspect equipment before operating. Repair or replace any worn or damaged parts. Replace missing or damaged safety shields and safety signs. Contact your Ditch Witch dealer for assistance. • Use equipment carefully. Stop operation and investigate anything that does not look or feel right.

  • Page 12: Emergency Procedures

    ST37x Operator’s Manual Safety - 11 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 13: If An Electric Line Is Damaged

    ST37x Operator’s Manual Safety - 12 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 14: If A Gas Line Is Damaged

    ST37x Operator’s Manual Safety - 13 Emergency Procedures If a Gas Line is Damaged Fire or explosion possible. Fumes could ignite and cause burns. No smoking, no flame, no spark. 275-419 (2P) Explosion possible. Serious injury or equipment damage could occur.

  • Page 15: If A Fiber Optic Cable Is Damaged

    ST37x Operator’s Manual Safety - 14 Emergency Procedures If a Fiber Optic Cable is Damaged Do not look into cut ends of fiber optic or unidentified cable. Vision damage can occur. Contact utility company. If Machine Catches on Fire Perform emergency shutdown procedure and then take the following actions. The order and degree of action will depend on the situation.

  • Page 16: Safety Alert Classification

    ST37x Operator’s Manual Safety - 15 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 17 ST37x Operator’s Manual Safety - 16 Machine Safety Alerts Machine Safety Alerts Tiedown location. See Transport chapter for more information. 274-318 Lift point. See Transport chapter for more information. 274-442 Fire or explosion possible. Do not use starter fluid. 273-459 (2P), 274-206 (2P), 700-206 (2P)
  • Page 18 ST37x Operator’s Manual Safety - 17 Machine Safety Alerts Moving digging teeth will cause death or serious injury. Trench cave-in can cause you to fall. Stay away. 274-002; 275-097 Read operator’s manual. Know how to use all controls. Your safety is at stake.

  • Page 19: Machine Safety Alerts

    ST37x Operator’s Manual Safety - 18 Machine Safety Alerts...

  • Page 20: Controls

    ST37x Operator’s Manual Controls - 19 Controls Chapter Contents Gauges and Indicators ..... 20 Graphic Display ......22 Service Interval Screen .

  • Page 21: Gauges And Indicators

    ST37x Operator’s Manual Controls - 20 Gauges and Indicators Gauges and Indicators t53om007h.eps t53om007h.eps 1. Auxiliary outlet 3. Hydraulic fluid level sight glass 2. Graphic display 4. Fuel gauge Item Description Notes 1. Auxiliary outlet To operate work lights or other 12V devices, plug into outlet.
  • Page 22 ST37x Operator’s Manual Controls - 21 Gauges and Indicators Item Description Notes 2. Graphic display See “Graphic Display” on page 22. c00ic098w.eps 3. Hydraulic fluid sight Shows level of hydraulic fluid glass in tank. Maintain fluid at halfway point on glass.

  • Page 23: Graphic Display

    ST37x Operator’s Manual Controls - 22 Graphic Display Graphic Display STOP Engine Load START UP RPMx100 0.0V Tier4 t43om026w.eps 1. High exhaust temperature indicator 11. Engine speed setpoint increase button 2. Air filter restriction indicator 12. Engine speed setpoint decrease button 3.
  • Page 24 ST37x Operator’s Manual Controls - 23 Graphic Display Item Description Notes 1. High exhaust Indicates high exhaust IMPORTANT: Will light when exhaust temperature indicator temperature. cleaning (DPF regeneration) is occurring. c00ic101w.eps 2. Air filter restriction Indicator will begin flashing To view the air filter percentage before...
  • Page 25 ST37x Operator’s Manual Controls - 24 Graphic Display Item Description Notes 5. Diagnostic message Appears when there is a Go to Diagnostics menu to see the indicator diagnostic trouble code. active and stored error messages. This indicates a warning code.
  • Page 26 ST37x Operator’s Manual Controls - 25 Graphic Display Item Description Notes 8. Engine coolant Displays coolant temperature. IMPORTANT: If temperature goes temperature indicator above 230°F (110°C): 1. Stop operation, set throttle to low idle, and allow engine to cool. 2. Stop engine.
  • Page 27 ST37x Operator’s Manual Controls - 26 Graphic Display Item Description Notes 12. Engine speed decrease To decrease engine speed, IMPORTANT: Each button press button push once. decreases engine by 360 rpm. To decrease to lowest speed, push twice. c00ic108w.eps 13. Menu button Press to go to the menu screen.
  • Page 28 ST37x Operator’s Manual Controls - 27 Graphic Display Item Description Notes 16. Service reminders Press to go to the service button reminders screen. c00ic112w.eps 17. Engine RPM setpoint Indicates the current throttle IMPORTANT: indicator setpoint. • When in manual throttle mode, this is the RPM the engine will try to maintain.
  • Page 29 ST37x Operator’s Manual Controls - 28 Graphic Display Item Description Notes 20. Engine percent load Displays the load on the gauge engine. c00ic115w.eps...

  • Page 30: Service Interval Screen

    ST37x Operator’s Manual Controls - 29 Service Interval Screen Service Interval Screen ENGINE INTERVAL REMAINING HOUR ENG HRS RESET t43om032w.eps 1. Selected service reminder 6. Return to main gauge display 2. Service reminder interval 7. Interval decrease 3. Time remaining 8.
  • Page 31 ST37x Operator’s Manual Controls - 30 Service Interval Screen Item Description Notes 4. Time base calculator Displays the time base for the service reminder. 5. Reset option Resets service reminder. 6. Return to main gauge Returns to the main gauge display display.
  • Page 32 ST37x Operator’s Manual Controls - 31 Service Interval Screen Item Description Notes 10. Down selection Will move the selection on the screen down. c00ic117w.eps...

  • Page 33: Controls

    ST37x Operator’s Manual Controls - 32 Controls Controls t53om006h.eps t53om006h.eps 1. Left track drive control or 4. Ignition switch Track drive joystick (optional) 5. Boom lift control 2. Right track drive control or 6. Attachment drive control Track drive joystick (optional) 7.
  • Page 34 ST37x Operator’s Manual Controls - 33 Controls Item Description Notes 1. Left track drive control To move forward, push. To turn right, move left control farther forward than right control. 2. Right track drive To move backward, pull. control To turn left, move right control farther To go faster in either forward than left control.
  • Page 35 ST37x Operator’s Manual Controls - 34 Controls Item Description Notes 5. Boom lift control To lower boom, push. To raise boom, pull. c00ic083a.eps 6. Attachment drive To engage attachment drive IMPORTANT: Use foot pedal to hold control in reverse, push forward.

  • Page 36: Engine Compartment

    ST37x Operator’s Manual Controls - 35 Engine Compartment Engine Compartment t53om004h.eps t53om004h.eps 1. Battery disconnect switch Item Description Notes 1. Battery disconnect To connect, turn clockwise. switch To disconnect, turn counterclockwise. c00ic156w.eps...
  • Page 37 ST37x Operator’s Manual Controls - 36 Engine Compartment...

  • Page 38: Prepare

    ST37x Operator’s Manual Prepare - 37 Prepare Chapter Contents Gather Information ......38 • All Jobs ..........38 •...

  • Page 39: Gather Information

    ST37x Operator’s Manual Prepare - 38 Gather Information Gather Information A successful job begins before you start working. The first step in planning is reviewing information already available about the job and jobsite. All Jobs 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 40: Inspect Site

    ST37x Operator’s Manual Prepare - 39 Inspect Site Inspect Site Identify Hazards 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 41: Classify Jobsite

    ST37x Operator’s Manual Prepare - 40 Classify Jobsite Classify Jobsite Jobsite hazards could cause death or serious injury. Use correct equipment and work methods. Use and maintain proper safety equipment. To help avoid injury: • Wear personal protective equipment including hard hat, safety eye wear, and hearing protection.

  • Page 42: Apply Precautions

    ST37x Operator’s Manual Prepare - 41 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 43: Check Supplies And Prepare Equipment

    ST37x Operator’s Manual Prepare - 42 Check Supplies and Prepare Equipment Check Supplies and Prepare Equipment Check Supplies • fuel NOTICE: Use low sulfur or ultra low sulfur fuel only. • keys • lubricants • personal protective equipment, such as hard hat and safety glasses...

  • Page 44: Assemble Accessories

    ST37x Operator’s Manual Prepare - 43 Check Supplies and Prepare Equipment Assemble Accessories Fire Extinguisher If required, mount a fire extinguisher near the power unit but away from possible points of ignition. The fire extinguisher should always be classified for both oil and electric fires. It should meet legal and regulatory...
  • Page 45 ST37x Operator’s Manual Prepare - 44 Check Supplies and Prepare Equipment...

  • Page 46: Drive

    ST37x Operator’s Manual Drive - 45 Drive Chapter Contents Start Unit ....... . . 46 Drive .
  • Page 47 ST37x Operator’s Manual Drive - 46 Start Unit Start Unit 1. Ensure all controls are in neutral. 2. Set parking brake. 3. Move throttle to half open. 4. Turn ignition switch to start position and release when engine starts. NOTICE: •...
  • Page 48 ST37x Operator’s Manual Drive - 47 Drive Safe Slope Operation Tipover possible. Machine can tip over and crush you. To help avoid injury: • Always operate with heavy end uphill. • Drive cautiously at all times. • Never jerk control levers. Use a steady even motion.
  • Page 49 ST37x Operator’s Manual Drive - 48 Shut Down Shut Down 1. Lower boom to ground. 2. Move all controls to neutral position. 3. Engage parking brake. 4. Turn ignition switch to STOP. 5. Remove key.

  • Page 50: Transport

    ST37x Operator’s Manual Transport - 49 Transport Chapter Contents Lift ........50 •...

  • Page 51: Lift

    ST37x Operator’s Manual Transport - 50 Lift Lift Crushing weight. If load falls or moves it could kill or crush you. Use proper procedures and equipment or stay away. To help avoid injury: Only lift unit without attachment installed. Points Lifting points are identified by lifting decals.

  • Page 52: Haul

    ST37x Operator’s Manual Transport - 51 Haul Haul Load Crushing weight. If load falls or moves it could kill or crush you. Use proper procedures and equipment or stay away. To help avoid injury: • Load and unload trailer on level ground.

  • Page 53: Tie Down

    ST37x Operator’s Manual Transport - 52 Haul Tie Down Points Tiedown points are identified by tiedown decals. Securing to truck or trailer at other points is unsafe and can damage machinery. Procedure Loop tiedowns around unit at tiedown points. Make sure tiedowns are tight before transporting.

  • Page 54: Unload

    ST37x Operator’s Manual Transport - 53 Haul Unload Crushing weight. If load falls or moves it could kill or crush you. Use proper procedures and equipment or stay away. To help avoid injury: • Load and unload trailer on level ground.

  • Page 55: Retrieve

    ST37x Operator’s Manual Transport - 54 Retrieve Retrieve Read operator’s manual. Know how to use all controls. Your safety is at stake. 273-475 Under normal conditions, unit should not be towed. If unit breaks down and retrieval is necessary: t43om010w.eps...
  • Page 56 ST37x Operator’s Manual Transport - 55 Retrieve Prepare Unit for Towing 1. Block tracks. 2. Engage parking brake if engine will start (shown). t53om008h.eps t53om008h.eps 3. Loosen bypass valves (shown) three turns. IMPORTANT: Open bypass valves in both front and rear pumps.
  • Page 57 ST37x Operator’s Manual Transport - 56 Retrieve...

  • Page 58: Trench

    ST37x Operator’s Manual Trench - 57 Trench Chapter Contents Set Up........58 Adjust Boom Position .
  • Page 59 To help avoid injury: Use attachments or counterweights to make front and rear loads balance when all ® attachments are raised. Contact your Ditch Witch dealer about counterweighting for your equipment. Jobsite hazards could cause death or serious injury. Use correct equipment and work methods.
  • Page 60 ST37x Operator’s Manual Trench - 59 Adjust Boom Position Adjust Boom Position 1. Engage parking brake. 2. Shut down unit. 3. Loosen four bolts (1) on both sides of pivot frame (3). 4. Raise bar (2) and slide boom to desired position.
  • Page 61 ST37x Operator’s Manual Trench - 60 Trench Trench Breathing crystalline silica dust. may cause lung disease. Cutting, drilling, or working materials such as concrete, sand, or rock containing quartz may result in exposure to silica dust. Use dust control methods or appropriate breathing protection when exposed to silica dust.
  • Page 62 ST37x Operator’s Manual Trench - 61 Trench 1. Adjust throttle to low idle. 2. Engage attachment control. 3. Increase engine speed to full throttle. 4. Slowly lower digging boom to depth. 5. Move ground drive control to desired speed. 6. Pull ground drive control rearward to desired trenching speed.
  • Page 63 ST37x Operator’s Manual Trench - 62 Trench...

  • Page 64: Complete The Job

    ST37x Operator’s Manual Complete the Job - 63 Complete the Job Chapter Contents Rinse Equipment ......64...
  • Page 65 ST37x Operator’s Manual Complete the Job - 64 Rinse Equipment Rinse Equipment 1. Spray water onto equipment to remove dirt and mud. NOTICE: Do not spray water onto operator’s console. Electrical components could be damaged. Wipe down instead. 2. Open hood and allow unit to cool. Remove debris from inside of unit.

  • Page 66: Service

    ST37x Operator’s Manual Service - 65 Service Chapter Contents Precautions ......66 •...

  • Page 67: Precautions

    ST37x Operator’s Manual Service - 66 Precautions Precautions Read operator’s manual. Know how to use all controls. Your safety is at stake. 273-475 To help avoid injury: • Unless otherwise instructed, all service should be performed with engine off. •...

  • Page 68: Recommended Lubricants/Service Key

    Service intervals listed are for minimum requirements. In extreme conditions, service machine more frequently. Use only genuine Ditch Witch parts, filters, approved lubricants, TJC, and approved coolants to maintain warranty. Fill to capacities listed in “Specifications” on page 97.
  • Page 69 Fleetguard ES Compleat coolant. This ® coolant is available, pre-diluted, from your Ditch Witch dealer as part number 255-1055. Contact your Cummins service partner for a full list of approved coolants meeting CES 14603.
  • Page 70 ST37x Operator’s Manual Service - 69 Recommended Lubricants/Service Key Approved Fuel Tier 4 Engine (U.S., Canada, EU, and Japan) Avoid static electricity when fueling. Ultra Low Sulfur Diesel (ULSD) poses a greater static ignition hazard than earlier diesel formulations. Avoid death or serious injury from fire or explosion.
  • Page 71 ST37x Operator’s Manual Service - 70 Recommended Lubricants/Service Key Exhaust Cleaning - Tier 4 Only This engine has a Diesel Particulate Filter (DPF) that purifies NOx emissions in the exhaust into nitrogen and water. The DPF system uses a small amount of engine lubricating oil to during the high-temperature combustion.

  • Page 72: Hour

    ST37x Operator’s Manual Service - 71 Startup/10 Hour Startup/10 Hour Location Task Notes Power Unit Check engine oil level Check engine air filter service indicator Check hydraulic fluid level Check brake operation Check lug nut torque 88-95 ft•lb (108-129 N•m)
  • Page 73 ST37x Operator’s Manual Service - 72 Startup/10 Hour Check Engine Air Filter Service Indicator Check air filter service indicator (1) and dust ejector (2) at startup and every 10 hours and change filter as needed. t54om013h.eps t54om013h.eps Check Hydraulic Fluid Level Check hydraulic fluid level at startup and every 10 hours.
  • Page 74 ST37x Operator’s Manual Service - 73 Startup/10 Hour Check Lug Nut Torque Check lug nut torque at 10 hours, 50 hours and every 200 hours thereafter. Tighten to 88-95 ft•lb (108-129 N•m) as needed. t54om015h.eps t54om015h.eps Check Coolant Level Check coolant level at overflow coolant bottle, with engine cool, at startup and every 10 hours.
  • Page 75 ST37x Operator’s Manual Service - 74 Startup/10 Hour Check Water Separator Filter Check water separator filter at startup and every 10 hours. When red float ring is raised, water should be drained. See “Drain Water Separator Filter” on page 88.
  • Page 76 ST37x Operator’s Manual Service - 75 Startup/10 Hour Check Hydraulic Hoses Pressurized fluid or air could pierce skin and cause severe injury. Refer to operator’s manual for proper use. 270-6035 To help avoid injury: • Use a piece of cardboard or wood, rather than hands, to search for leaks.

  • Page 77: Trencher

    ST37x Operator’s Manual Service - 76 Startup/10 Hour Trencher Lube Auger Bearing Lube auger bearing zerk with MPG every 10 hours. t43om035w.eps Check Digging Chain Tension Check digging chain tension every 10 hours and adjust as needed. With boom horizontal, measure distance A from bottom of boom to chain.
  • Page 78 ST37x Operator’s Manual Service - 77 Startup/10 Hour Check Restraint Bar Position Check restraint bar position every 10 hours, or anytime the digging chain is adjusted or replaced. The restraint bar is properly positioned when the end of bar extends between the center of the tail...

  • Page 79: 50 Hour

    ST37x Operator’s Manual Service - 78 50 Hour 50 Hour Location Task Notes Change engine oil and filter initial service Check fan belt tension and damage 1/4-1/3” (7-9 mm), initial Change hydraulic fluid filter initial Check fuel hose and clamp band...
  • Page 80 ST37x Operator’s Manual Service - 79 50 Hour Check Fan Belt for Tension and Damage Check belt tension after 50 hours. Belt is properly tensioned when it moves about 1/4-3/8” (7-9 mm) when pushed at the long span. Replace the belt when it is worn and sinks into the pulley groove.
  • Page 81 ST37x Operator’s Manual Service - 80 50 Hour Check Lug Nut Torque Check lug nut torque at 10 hours, 50 hours and every 200 hours thereafter. Tighten to 88-95 ft•lb (108-129 N•m) as needed. t54om015h.eps t54om015h.eps Check Idler Roller Bearings...

  • Page 82: 250 Hour

    ST37x Operator’s Manual Service - 81 250 Hour 250 Hour Location Task Notes Change engine oil and filter Check intake air line Check fan belt for tension and damage 1/4-1/3” (7-9 mm) Change hydraulic filter Check lug nut torque 88-95 ft•lb (108-129 N•m)
  • Page 83 ST37x Operator’s Manual Service - 82 250 Hour Check Fan Belt for Tension and Damage Check belt tension every 250 hours. Belt is properly tensioned when it moves about 1/4-3/8” (7-9 mm) when pushed at the long span. Replace the belt when it is worn and sinks into the pulley groove.
  • Page 84 ST37x Operator’s Manual Service - 83 250 Hour Check Lug Nut Torque Check lug nut torque at initial intervals and every 250 hours thereafter. Tighten to 88-95 ft•lb (108- 129 N•m) as needed. t54om015h.eps t54om015h.eps Check Idler Roller Bearings Check for proper positioning of idler roller bearings every 300 hours.

  • Page 85: 500 Hour

    Change filter every 500 hours. If you refuel from cans, replace filter more often. The canister filter is located in the engine compartment. ® See parts manual or contact your Ditch Witch dealer for correct replacement filter. t54om023h.eps t54om023h.eps Change Hydraulic Fluid and Filter Change hydraulic fluid and filter every 500 hours.
  • Page 86 ST37x Operator’s Manual Service - 85 500 Hour Change Water Separator Filter Change water separator filter every 500 hours. 1. Turn off at valve (1). 2. Purge fuel out of filter by unscrewing bottom drain plug (2). 3. Unscrew bottom of filter (3).

  • Page 87: 1000 Hour

    ST37x Operator’s Manual Service - 86 1000 Hour 1000 Hour Location Task Notes Change engine coolant Adjust valve clearance ® Yanmar certified technician Change Engine Coolant Drain cooling system at drain (2). Add approved coolant at fill (1) every 1000 hours.

  • Page 88: As Needed

    ST37x Operator’s Manual Service - 87 As Needed As Needed Location Task Notes Power Unit Change air filter Drain water separator filter Adjust attachment drive foot control Adjust idler roller bearings Check battery Charge battery Trencher Check digging chain rollers, sidebars, pins, and...

  • Page 89: Power Unit

    ST37x Operator’s Manual Service - 88 As Needed Power Unit Change Air Filter Change air filter when red band on indicator (1) is visible. Replace secondary element (4) every third change of primary element (3) or any time primary element has become damaged.
  • Page 90 ST37x Operator’s Manual Service - 89 As Needed Adjust Attachment Drive Controls Adjust foot control if stepping on pedal moves attachment drive control handle. To adjust foot control: 1. Stand on platform and press attachment drive foot control pedal down completely.
  • Page 91 ST37x Operator’s Manual Service - 90 As Needed Adjust Idler Roller Bearings Adjust idler roller bearings to keep dirt, grass, and other foreign matter from damaging bearings as needed when hubs become loose. 1. Release track tension. See “Check Hydraulic Hoses”...
  • Page 92 ST37x Operator’s Manual Service - 91 As Needed Check Battery Check battery as needed. Keep battery clean and terminals free of corrosion. To clean: 1. Turn battery disconnect switch, if equipped, to the off position. 2. Ensure that no ignition sources are near batteries.
  • Page 93 ST37x Operator’s Manual Service - 92 As Needed Charge Battery Explosion possible. Serious injury or equipment damage could occur. Follow directions carefully. To help avoid injury: • Use a single 12V maximum source for charging. Do not connect to rapid chargers or dual batteries.
  • Page 94 ST37x Operator’s Manual Service - 93 As Needed Charging Procedure (Engine Off) 1. Park service vehicle close to disabled equipment but do not allow vehicles to touch. Engage parking brake in both vehicles. 2. Turn the ignition switch to the OFF position in both vehicles, and turn off all electrical loads. Disconnect the machine controller.

  • Page 95: Trencher

    Check Digging Chain Teeth and Bits ® Inspect digging chain teeth for wear as needed. Replace worn teeth with new Ditch Witch teeth. Each unit is equipped with a standard tooth configuration. When replacing teeth, maintain original tooth pattern.
  • Page 96 ST37x Operator’s Manual Service - 95 As Needed Replace Digging Chain Visually check digging chains for wear on rollers and sidebars (2). Check pins (3) and bushing wear by measuring distance between chain pins and comparing it with a new chain. Also check digging teeth (1).
  • Page 97 ST37x Operator’s Manual Service - 96 As Needed...

  • Page 98: Specifications

    ST37x Operator’s Manual Specifications - 97 ST37x Specifications ST37x t54om001h.eps t54om001h.eps Dimensions U.S. Metric Overall height of machine 57 in 1450 mm Overall length of machine, without chain 104.5 in 2654 mm Overall length of machine, with 36” chain 130 in...
  • Page 99 ST37x Operator’s Manual Specifications - 98 ST37x Dimensions U.S. Metric Centerline trench to outside edge of unit, right 21-37 in 533-940 Headshaft height 23 in 584 mm Headshaft overhang 18 in 457 mm Swing radius, front, w/36” chain 81 in...
  • Page 100 ST37x Operator’s Manual Specifications - 99 ST37x Hydraulic System U.S. Metric Auxiliary: double gear pump Combined flow rate 13.9 gpm 52.7 L/min Pressure 3625 psi 250 bar Chain speed 369 fpm 112 m/min Ground drive: dual hydrostat Flow rate 15 gpm 56.8 L/min...
  • Page 101 ST37x Operator’s Manual Specifications - 100 ST37x...

  • Page 102: Support

    Return damaged parts to dealer for inspection and warranty consideration if in warranty time frame. Order genuine Ditch Witch replacement or repair parts from your authorized Ditch Witch dealer. Use of another manufacturer's parts may void warranty consideration.
  • Page 103 Defects will be determined by an inspection within thirty (30) days of the date of failure of the product or part by Ditch Witch Product Support (DWPS) or its authorized dealer. DWPS will provide the location of its inspection facilities or its nearest authorized dealer upon inquiry.
  • Page 106 ST37x Operator’s Manual Service Record - 105 Service Record Service Performed Date Hours...
  • Page 107 ST37x Operator’s Manual Service Record - 106 Service Performed Date Hours...
  • Page 108 ST37x Operator’s Manual Appendix - 107 Appendix Chapter Contents Engine Diagnostic Codes...
  • Page 109 Engine Diagnostic Trouble Codes Yanmar 3TNV88C engine P code FMI Part State P0336 Crank signal malfunction 522400 Crank speed sensor P0337 No crank signal P0341 Cam signal malfunction 522401 Cam speed sensor P0342 No cam signal P1341 Angle offset failure P0008 523249 Crank speed, cam speed sensor...
  • Page 110 P1434 DPF intermediate temperature sensor fault (high voltage) P1435 DPF intermediate temperature sensor fault (low voltage) 3250 DPF intermediate temperature sensor P0420 DPF intermediate temperature sensor temperature abnormal low DPF intermediate temperature sensor temperature abnormal high (post- P1426 injection failure) P2229 Atmospheric pressure sensor fault (high voltage) Atmospheric pressure sensor...
  • Page 111 P1641 High-pressure pump drive circuit (low side VB short-circuit) 522571 P1643 High-pressure pump drive circuit (low side GND short-circuit) P0629 High-pressure pump drive circuit (high side VB short-circuit) SCV (MPROP) P1642 High-pressure pump drive circuit (high side GND short-circuit) P0627 High-pressure pump drive circuit (open circuit) P062A High-pressure pump drive circuit (drive current (high level))
  • Page 112 P0404 EGR over-voltage fault P1404 EGR under-voltage fault 2791 P1409 EGR feedback malfunction U0401 EGR ECM data fault P0403 Open circuit between the EGR motor coils P1405 522579 Short circuit between the EGR motor coils EGR valve P0488 522580 EGR position sensor malfunction P148A 522581 EGR stuck open valve malfunction...

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