SK850 Operator’s Manual CMW® Issue 1.
SK850 Operator’s Manual Overview - 1 Overview Chapter Contents Serial Number Location . . . . . . . . . . . . . . . . . . . . . . 2 Intended Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Equipment Modification . . . . . . . . . . . . . . . . . . . . . . 3 Unit Components . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Operator Orientation. . . . . . . . . . . . . . . . . . . . . . . . . 5 About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . .
SK850 Operator’s Manual Overview - 2 Serial Number Location Serial Number Location Record serial numbers and date of purchase in spaces provided. Unit serial number is located as shown. t43om001w.
SK850 Operator’s Manual Overview - 3 Intended Use Intended Use The SK850 is a platform, rubber track mini skid steer unit designed for light-to medium-duty construction work. The SK850 has a quick attach mount plate which makes it easy for an operator to connect different attachments. The SK850 can be used as a dedicated footings trencher using the TR50 trenching attachment. The unit is designed for operation in temperatures typically experienced in earth moving and construction work environments.
SK850 Operator’s Manual Overview - 4 Unit Components Unit Components 1 t43om002w.eps 1. Operator station 2. Tracks 3. Engine compartment 4. Lift arms 5.
SK850 Operator’s Manual Overview - 5 Operator Orientation Operator Orientation 1 1. Front of unit 2. Right side of unit 3. Rear of unit 4. Left side of unit 4 2 3 t43om003w.
Overview - 6 SK850 Operator’s Manual About This Manual About This Manual This manual contains information for the proper use of this machine. See the beige Operation Overview pages 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.
SK850 Operator’s Manual Foreword - 7 Foreword This manual is an important part of your equipment. It provides safety information and operation instructions to help you use and maintain your Ditch Witch® equipment. Read this manual before using your equipment. Keep it with the equipment at all times for future reference. 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.
SK850 Operator’s Manual Foreword - 8 SK850 Operator’s Manual Issue number 1.0 / OM-10/14 Part number 053-2790 Copyright 2014 by The Charles Machine Works, Inc. , Ditch Witch, CMW, and Roto Witch are registered trademarks of The Charles Machine Works, Inc.
SK850 Operator’s Manual Contents - 9 Contents Overview 1 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 7 part number, revision level, and publication date of this manual, and factory contact information Safety 11 machine safety alerts and emergency procedures Controls 21 machine controls, gauges, and indicators and how to use them Prepare 39 procedures for inspecting and classifying
Contents - 10 Service Record a record of major service performed on the machine CMW® SK850 Operator’s Manual 105
SK850 Operator’s Manual Safety - 11 Safety Chapter Contents Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Emergency Procedures . . . . . . . . . . . . . . . . . . . . . 13 • Electric Strike Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 • If an Electric Line is Damaged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 • If a Gas Line is Damaged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety - 12 SK850 Operator’s Manual Guidelines Guidelines Follow these guidelines before operating any jobsite equipment: • Complete proper training and read operator’s manual before using equipment. • Contact your local One-Call (811 in USA) or the One-Call referral number (888-258-0808 in USA and Canada) to have underground utilities located before digging. Also contact any utilities that do not participate in the One-Call service.
SK850 Operator’s Manual Safety - 13 Emergency Procedures Emergency Procedures Jobsite hazards could cause death or serious injury. Use correct equipment and work methods. Use and maintain proper safety equipment. 274-050 Before operating any equipment, review emergency procedures and check that all safety precautions have been taken. EMERGENCY SHUTDOWN - Turn ignition switch to stop position or push remote engine stop button (if equipped). Electric Strike Description Electric shock.
Safety - 14 SK850 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.
SK850 Operator’s Manual Safety - 15 Emergency Procedures If a Gas Line is Damaged Fire or explosion possible. Fumes could ignite and cause burns. No smoking, no flame, no spark. 275-419 (2P) Explosion possible. Serious injury or equipment damage could occur. 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.
Safety - 16 SK850 Operator’s Manual 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. • Immediately move battery disconnect switch (if equipped and accessible) to disconnect position.
SK850 Operator’s Manual Safety - 17 Safety Alert Classifications Safety Alert Classifications These classifications and the icons defined on the following pages work together to alert you to situations which could be harmful to you, jobsite bystanders or your equipment. When you see these words and icons in the book or on the machine, carefully read and follow all instructions. YOUR SAFETY IS AT STAKE. Watch for the three safety alert levels: DANGER, WARNING and CAUTION. Learn what each level means.
SK850 Operator’s Manual Safety - 18 Machine Safety Alerts Machine Safety Alerts 1 2 Crushing weight. Place cylinder lock on extended cylinder and secure. 273-413 Read operator’s manual. Know how to use all controls. Your safety is at stake. 273-475 Lift point. See Transport chapter for more information.
SK850 Operator’s Manual Safety - 19 Machine Safety Alerts Tiedown location. See Transport chapter for more information. 274-318 4 Moving parts could cut off hand or foot. Stay away. 5 6 275-184 Crushing weight could cause death or serious injury. Stay away. 275-326 Hot parts may cause burns. Do not touch until cool 7 or wear gloves. 275-355 (2-P) Fire or explosion possible. Do not use starter fluid.
SK850 Operator’s Manual Safety - 20 Attachment Safety Alerts Attachment Safety Alerts TR50 1 CMW® 6ft/2m Moving digging teeth can kill. Trench cave-in can cause you to fall. Stay away.
SK850 Operator’s Manual Controls - 21 Controls Chapter Contents Gauges and Indicators . . . . . . . . . . . . . . . . . . . . . . 22 Graphic Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Service Interval Screen . . . . . . . . . . . . . . . . . . . . . 31 Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Engine Compartment . . . . . . . . . . . . . . . . . . . . . . . 37 Tool Carrier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SK850 Operator’s Manual Controls - 22 Gauges and Indicators Gauges and Indicators 1 2 3 4 t43om004w.eps 1. Auxiliary outlet 3. Hydraulic fluid level sight glass 2. Graphic display 4. Fuel gauge Item Description 1. Auxiliary outlet To operate work lights or other 12V devices, plug into outlet.
SK850 Operator’s Manual Controls - 23 Gauges and Indicators Item Description 2. Graphic display See “Graphic Display” on page 24. Notes c00ic098w.eps 3. Hydraulic fluid sight glass Shows level of hydraulic fluid in tank. Maintain fluid at halfway point on glass. c00ic099w.eps 4. Fuel gauge Shows level of fuel in tank. NOTICE: Use low sulfur or ultra low sulfur fuel only. c00ic100w.
SK850 Operator’s Manual Controls - 24 Graphic Display Graphic Display 1 2 3 4 5 6 7 125 230 100 190 STOP Engine 75 20 150 32 Load 0% 50 15 0 10 30 25 STARTUP 5 70 20 9 30 RPMx100 0.0V 0 0 0 35 HRS 18 10 11 Tier4 t43om026w.eps 8 110 25 19 F 17 16 15 14 13 12 1. High exhaust temperature indicator 11. Engine speed setpoint increase button 2. Air filter restriction indicator 12. Engine speed setpoint decrease button 3.
SK850 Operator’s Manual Controls - 25 Graphic Display Item Description Notes 1. High exhaust temperature indicator Indicates high exhaust temperature. IMPORTANT: Will light when DPF regeneration is occurring. Indicator will begin flashing once the air filter is 25% unrestricted. Percentage will decrease as air filter becomes more restricted. To view the air filter percentage before 25% unrestricted, press the diagnostics menu button at any time. c00ic101w.eps 2.
SK850 Operator’s Manual Controls - 26 Graphic Display Item Description 5. Diagnostic message indicator Appears when there is a diagnostic trouble code. This indicates a warning code. c00ic102w.eps This indicates a stop code. c00ic103w.eps 6. Glow plug indicator Lights when ignition switch is on and glow plug button is pressed. 7. DPF regeneration indicator Will flash if regeneration is needed but has not occurred yet. Will light if regeneration is occurring. c00ic104w.
SK850 Operator’s Manual Controls - 27 Graphic Display Item Description Notes 8. Engine coolant temperature indicator Displays coolant temperature. IMPORTANT: If temperature goes above 230°F (110°C): 1. Stop operation, set throttle to low idle, and allow engine to cool. 2. Stop engine. 3. Check coolant level. c00ic116w.eps 9. DPF manual indicator 4. Ensure radiator is clean. Will light when DPF regeneration has been manually delayed. c00ic105w.eps 10. Hourmeter Displays engine operating time.
SK850 Operator’s Manual Controls - 28 Graphic Display Item Description Notes 12. Engine speed decrease button To decrease engine speed, push. IMPORTANT: Each button press decreases engine by 360 rpm. c00ic108w.eps 13. Menu button Press to go to the menu screen. c00ic109w.eps 14. Engine speed (RPM) Displays engine RPM. c00ic110w.eps 15. Throttle system state indicator STARTUP Displays one of the three states of the throttle system.
SK850 Operator’s Manual Controls - 29 Graphic Display Item Description 16. Service reminders button Press to go to the service reminders screen. Notes c00ic112w.eps 17. Engine RPM setpoint indicator Indicates the current throttle setpoint. IMPORTANT: • When in manual throttle mode, this is the RPM the engine will try to maintain. • When in auto-throttle mode, this indicates the full throttle setpoint. c00ic113w.eps 18. Tier 4 menu button Press to go to the DPF control menu.
SK850 Operator’s Manual Controls - 30 Graphic Display Item Description Notes 20. Engine percent load gauge Displays the load on the engine. IMPORTANT: Running the unit with the engine load at 100% for an extended time will cause the engine to stall. c00ic115w.
SK850 Operator’s Manual Controls - 31 Service Interval Screen Service Interval Screen ENGINE 1 INTERVAL 0 HRS 2 REMAINING 0 HRS 3 ENG HRS 4 HOUR RESET t43om032w.eps 10 5 9 8 7 6 1. Selected service reminder 6. Return to main gauge display 2. Service reminder interval 7. Interval decrease 3. Time remaining 8. Interval increase 4. Time base calculator 9. Up selection 5. Reset option 10. Down selection Item Description Notes 1.
SK850 Operator’s Manual Controls - 32 Service Interval Screen Item Description 4. Time base calculator Displays the time base for the service reminder. 5. Reset option Resets service reminder. 6. Return to main gauge display Returns to the main gauge display. Notes c00ic121w.eps 7. Interval decrease Selects the previous reminder or parameter, or decreases service intervals by 10 hours. c00ic120w.eps 8.
SK850 Operator’s Manual Controls - 33 Service Interval Screen Item Description 10. Down selection Will move the selection on the screen down. Notes c00ic117w.
SK850 Operator’s Manual Controls - 34 Controls Controls 1 4 5 2 6 3 7 t43om005w.eps 1. Left track drive control or Track drive joystick (optional) 2. Right track drive control or Track drive joystick (optional) 3. Parking brake switch CMW® 4. Ignition switch 5. Lift arm control 6. Attachment drive control 7.
SK850 Operator’s Manual Controls - 35 Controls Item Description Notes 1. Left track drive control To move forward, push. 2. Right track drive control To turn right, move left control farther forward than right control. To move backward, pull. To go faster in either direction, move control farther from neutral position. To stop, move to neutral position. Track drive joystick (optional) To move forward, push. To move backward, pull.
SK850 Operator’s Manual Controls - 36 Controls Item Description Notes 4. Ignition switch To start engine, insert key and turn clockwise. IMPORTANT: • If engine does not start or stalls, turn key to STOP and then restart. • Do not allow starter motor to run continuously for more than 20 seconds. To stop engine, turn key counterclockwise. 5. Lift arm control To move lift arms down, push. To float, push forward to end. To move lift arms up, pull. To curl attachment up, move to left.
SK850 Operator’s Manual Controls - 37 Engine Compartment Engine Compartment 1 t43om029w.eps 1. Battery disconnect switch Item Description 1. Battery disconnect switch To connect, turn clockwise. Notes To disconnect, turn counterclockwise.
SK850 Operator’s Manual Controls - 38 Tool Carrier Tool Carrier 1 2 t43om034w.eps 1. Level indicator 2. Attachment latches Item Description Notes 1. Level indicator To level bucket, adjust bucket position until indicator is at top of sleeve. To level other attachments, adjust attachment position until it is level. Mark indicator position on sleeve. Use mark to indicate level with that attachment. 2. Attachment latches To lock attachment, move latch down. To unlock attachment, move latch up.
SK850 Operator’s Manual Prepare - 39 Prepare Chapter Contents Gather Information . . . . . . . . . . . . . . . . . . . . . . . . . 40 Inspect Site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 • Identify Hazards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41 Classify Jobsite . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 • Inspect Jobsite . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Prepare - 40 SK850 Operator’s Manual 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. 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.
SK850 Operator’s Manual Prepare - 41 Inspect Site Inspect Site Inspect jobsite before transporting equipment. Check for the following: • changes in elevation such as hills or other open trenches • obstacles such as buildings, railroad crossings, or streams • signs of utilities (See “Inspect Jobsite” on page 42.) • traffic • access • soil type and condition Identify Hazards Identify safety hazards and classify jobsite if attachment will penetrate ground. See “Classify Jobsite” on page 42.
Prepare - 42 SK850 Operator’s Manual Classify Jobsite Classify Jobsite Inspect Jobsite • 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 • Follow U.S. Department of Labor regulations on excavating and trenching (Part 1926, Subpart P) and other similar regulations.
SK850 Operator’s Manual Prepare - 43 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.
SK850 Operator’s Manual Prepare - 44 Check Supplies and Prepare Equipment Check Supplies and Prepare Equipment Supplies • fuel NOTICE: Use low sulfur or ultra low sulfur fuel only. • keys • lubricants • personal protective equipment, such as hard hat and safety glasses Fluid Levels • fuel NOTICE: Use low sulfur or ultra low sulfur fuel only. • hydraulic fluid • battery charge • engine oil Condition and Function • parking brake pins (See “Check Brake Operation” on page 73.
SK850 Operator’s Manual Prepare - 45 Connect Attachment Connect Attachment NOTICE: Use only Ditch Witch®-approved attachments. Attachments can change the stability and operating characteristics of the unit. See attachment operation manual for instructions regarding proper operation of attachments. Attachment IMPORTANT: Before connecting attachment to unit, ensure that mount and receiver plates are free of dirt and debris. 1.
SK850 Operator’s Manual Prepare - 46 Connect Attachment 7. Ensure pins are engaged by rotating attachment down. t43om007w.
SK850 Operator’s Manual Prepare - 47 Connect Attachment Hydraulic Hoses If attachment requires hydraulic power for operation, connect hydraulic hoses. Pressurized fluid or air could pierce skin and cause severe injury. Refer to operator’s manual for proper use. To help avoid injury: • Escaping pressurized fluid can cause injury or pierce skin and poison. • Before disconnecting a hydraulic line, turn engine off and operate all controls to relieve pressure.
Prepare - 48 SK850 Operator’s Manual Connect Attachment CMW®
SK850 Operator’s Manual Drive - 49 Drive Chapter Contents Start Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Shut Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SK850 Operator’s Manual Drive - 50 Start Unit Start Unit 1. Ensure all controls are in neutral. 2. If necessary, use glow plugs to warm cold engine. 3. Move throttle to half open. 4. Turn ignition switch to start position and release when engine starts. EMERGENCY SHUTDOWN: Turn ignition switch to STOP. Drive General Operation Tipover possible. Machine can tip over and crush you. To help avoid injury: • Always operate with load end uphill. • Always carry load low.
SK850 Operator’s Manual Drive - 51 Drive Safe Slope Operation Tipover possible. Machine can tip over and crush you. To help avoid injury: • Always operate with heavy end uphill. • Always carry load low. High load can cause tipping, loss of load or loss of visibility. • Drive cautiously at all times. • Never jerk control levers. Use a steady even motion.
Drive - 52 SK850 Operator’s Manual Shut Down Shut Down 1. Lower lift arms to ground. 2. Move all controls to neutral position. 3. Engage parking brake. 4. Turn ignition switch to STOP. 5. Remove key.
SK850 Operator’s Manual Transport - 53 Transport Chapter Contents Lift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 • Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54 • Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55 Haul . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 • Load . . . . . . . . . . . . . . . . . . . . . .
Transport - 54 SK850 Operator’s Manual 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. Lifting at other points is unsafe and can damage machinery.
SK850 Operator’s Manual Transport - 55 Lift Procedure Use a hoist capable of supporting the equipment's size and weight. See “Specifications” on page 97 or measure and weigh equipment before lifting. Use one of the methods below: • Use two points nearest operator station. IMPORTANT: Front of unit will be lower than rear of unit when using only two lift points. • Use three lift points as shown. NOTICE: Do not lift unit with attachments installed. t43om008w.
SK850 Operator’s Manual Transport - 56 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. • Incorrect loading can cause trailer swaying. • Attach trailer to vehicle before loading or unloading. • Only operate unit from operator platform.
SK850 Operator’s Manual Transport - 57 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. t43om009w.
SK850 Operator’s Manual Transport - 58 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. • Attach trailer to vehicle before loading or unloading. • Only operate unit from operator platform. • If unloading from tilt-bed trailer, be prepared for trailer to tilt. 1. Prepare trailer and ramps for unloading. 2. Remove tiedowns. 3. Start engine. 4.
SK850 Operator’s Manual Transport - 59 Tow Tow 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 towing is necessary: t43om010w.eps rear tow point • attach chains to tow points facing towing vehicle • tow for short distances at less than 1 mph (1.
SK850 Operator’s Manual Transport - 60 Tow Prepare Unit for Towing 1. Block tracks. 2. Engage parking brake (shown). t43om012w.eps 3. Loosen bypass valves (shown) three turns. IMPORTANT: Open bypass valves in both front and rear pumps. NOTICE: When bypass valves are open, unit has no brakes. t43om030w.eps Return Unit to Normal Operation 1. Tighten bypass valves and tighten locknut to 15-18 ft•lb (20-25 N•m). IMPORTANT: Close bypass valve in both front and rear pumps. 2. Disengage parking brake. 3.
SK850 Operator’s Manual Trench - 61 Trench Chapter Contents Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SK850 Operator’s Manual Trench - 62 Setup Setup EMERGENCY SHUTDOWN - Turn ignition switch to STOP. Crushing weight could cause death or serious injury. Use proper procedures and equipment or stay away. 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.
SK850 Operator’s Manual Trench - 63 Setup Operation Use breathing protection when exposed to silica dust. 270-4952 Electrical shock. Contacting electrical lines will cause death or serious injury. Know location of lines and stay away. To help avoid injury: Expose lines by hand before digging. Cutting high voltage cable can cause electrocution. Read operator’s manual. Know how to use all controls. Your safety is at stake.
SK850 Operator’s Manual Trench - 64 Setup 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. Trenching movement is toward you. NOTICE: • Do not make sharp turns. Lower boom to full depth when turning. • If an object becomes lodged in chain, move attachment speed/direction control to neutral and raise boom slightly.
SK850 Operator’s Manual Complete the Job - 65 Complete the Job Chapter Contents Rinse Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . 66 Disconnect Attachment . . . . . . . . . . . . . . . . . . . . . 66 Stow Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Complete the Job - 66 SK850 Operator’s Manual 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. 3. Remove mud from track sprockets. 4. Wash undercarriage. Pay special attention to brake pin area. Disconnect Attachment 1. Lower attachment to the ground. 2. Turn off engine. 3.
SK850 Operator’s Manual Service - 67 Service Chapter Contents Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 • Working under Raised Lift Arms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68 • Welding Precaution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 Recommended Lubricants/Service Key . . . . . . . . 69 Engine Oil Temperature Chart . . .
SK850 Operator’s Manual Service - 68 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. • Before servicing equipment, lower unstowed attachments to ground. Working under Raised Lift Arms Crushing weight. Place cylinder lock on extended cylinder and secure. 273-231 Use safety supports as indicated when working under raised lift arms.
SK850 Operator’s Manual Service - 69 Overview Overview 500 h 200 h 50 h 10 h 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) THF Tractor hydraulic fluid, similar to Phillips 66® HG, Mobilfluid® 423, Chevron® Tractor Hydraulic Fluid, Texaco® TDH Oil, or equivalent MPG Multipurpose grease meeting NLGI GC-LB Grade 2 Check level of fluid or lubricant Check condit
SK850 Operator’s Manual Service - 70 Engine Oil Temperature Chart For more information on engine lubrication and maintenance, see your engine manual. IMPORTANT: Use the “Service Record” on page 105 to record all required service to your machine. Engine Oil Temperature Chart SAE 10W SAE 20W SAE 5W - 30 SAE 10W - 30 SAE 15W - 40 SAE #20 SAE #30 SAE #40 t43om031w.eps Temperature range anticipated before next oil change For more information on engine lubrication and maintenance, see your engine manual.
SK850 Operator’s Manual Service - 71 Engine Oil Temperature Chart Approved Fuel The engine is this unit is designed to run on diesel fuel. Use only high-quality fuel meeting ASTM D975 No. 2D, EN590, or equivalent. At temperatures below 32°F (0°C), winter fuel blends are acceptable. See engine operation manual for more information. IMPORTANT: • For machines operated in the U.S.: The engine in this product is certified to operate on low sulfur diesel fuel (LSD) with a sulfur content of 500 ppm (0.
SK850 Operator’s Manual Service - 72 Startup/10 Hour Startup/10 Hour Location Task Notes Check engine oil level DEO Check engine air filter service indicator Check engine coolant level DEAC Check hydraulic fluid level THF Check brake operation Check track tension Check lug nut torque 88-95 ft•lb (108-129 N•m) Check hydraulic hoses TR50 Lube auger bearing MPG Check digging chain tension Check restraint bar position MPG Check Engine Oil Level Check engine oil level at dipstick opening (1) a
SK850 Operator’s Manual Service - 73 Startup/10 Hour Check Engine Air Filter Service Indicator Check air filter service indicator (shown) at startup and every 10 hours and change filter as needed. See “Change Air Filter” on page 87. t35om010w.eps Check Hydraulic Fluid Level Check hydraulic fluid level at startup and every 10 hours. Maintain fluid level at halfway point on sight glass (2), when engine is off, cylinders are fully retracted, and fluid is cool. If low, add THF at fill (1). 1 2 t35om013w.
SK850 Operator’s Manual Service - 74 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. Check Track Tension Check track tension at startup and every 10 hours and adjust as needed. Track is correctly tensioned when measurement between track and straight edge (2) is 1/2 in (13 mm). t35om036w.eps 1 To adjust: 1. Park machine on smooth, flat surface. 2.
SK850 Operator’s Manual Service - 75 Startup/10 Hour Check Coolant Level Check coolant level, with engine cool, at overflow bottle at startup and every 10 hours. Maintain coolant level at halfway point on bottle. If low, add approved coolant. IMPORTANT: See page 70 for information on approved coolants. t43om015w.
SK850 Operator’s Manual Service - 76 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: • Before disconnecting a hydraulic line, turn engine off and operate all controls to relieve pressure. Lower, block, or support any raised component with a hoist. Cover connection with heavy cloth and loosen connector nut slightly to relieve residual pressure.
SK850 Operator’s Manual Service - 77 Startup/10 Hour TR50 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. When properly tensioned, distance A should be 1.5-2.0” (38-51 mm). NOTICE: Do not overtighten chain.
Service - 78 SK850 Operator’s Manual 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 roller/sprocket and the end of the digging chain.
SK850 Operator’s Manual Service - 79 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) Change hydraulic fluid filter initial Check fuel hose and clamp band Check radiator/hydraulic fluid cooler for dirt and debris Check lug nut torque 88-95 ft•lb (108-129 N•m) Check idler roller bearings Change Engine Oil and Filter (Initial) 3 Change engine oil after 50 hours. Raise lift arms and install safety supports.
SK850 Operator’s Manual Service - 80 50 Hour Check Fan Belt for Tension and Damage Check belt tension every 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. Adjust Tension 1. Loosen two alternator bolts (shown). 2. Adjust position as needed. 3. Tighten bolts. 4. Check tension. Check Fuel Hose and Clamp Bands Check fuel hose and clamp bands every 50 hours.
SK850 Operator’s Manual Service - 81 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. Check Idler Roller Bearings t35om036w.eps Check for proper idler roller bearing positioning by lifting unit off of the ground and rocking each hub to check for movement. If adjustment is needed, see “Adjust Idler Roller Bearings” on page 89. t43om027w.
SK850 Operator’s Manual Service - 82 200 Hour 200 Hour Location Task Notes Change engine oil and filter DEO Check intake air line 1/4-1/3” (7-9 mm) Change hydraulic filter Check lug nut torque 88-95 ft•lb (108-129 N•m) Check idler roller bearings Change Engine Oil and Filter 3 Change engine oil and filter every 200 hours. Raise lift arms and install safety supports. See “Working under Raised Lift Arms” on page 68. Drain oil (1), change filter (2) and add 5 qt (4.7 L) of DEO at fill (3).
SK850 Operator’s Manual Service - 83 200 Hour Change Hydraulic Filter Change hydraulic filter every 200 hours. t43om016w.eps Check Lug Nut Torque Check lug nut torque at initial intervals and every 200 hours thereafter. Tighten to 88-95 ft•lb (108129 N•m) as needed. Check Idler Roller Bearings t35om036w.eps Check for proper idler roller bearing positioning by lifting unit off of the ground and rocking each hub to check for movement.
SK850 Operator’s Manual Service - 84 500 Hour 500 Hour Location Task Notes Change fuel filter Change hydraulic fluid and filter Change water separator filter Change Fuel Filter 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. t43om020w.eps Change Hydraulic Fluid and Filter Change hydraulic fluid and filter every 500 hours.
SK850 Operator’s Manual Service - 85 500 Hour Change Water Separator Filter Change water separator filter every 500 hours. 1 4 1. Turn off at valve (1). 2. Purge fuel out of filter by unscrewing bottom drain plug (2). 3 3. Unscrew bottom of filter (3). 4. Replace filter (4). 5. Screw bottom of filter back on. 6. Turn on at valve. 2 t43om024w.
SK850 Operator’s Manual Service - 86 2000 Hour 2000 Hour Change Engine Coolant Drain cooling system at drain (2). Add approved coolant at fill (1) every two years or 2000 hours. 1 NOTICE: • The use of non-approved coolant may lead to engine damage or premature engine failure and will void engine warranty. • See page 70 for list of approved coolants. 2 t35om031w.
SK850 Operator’s Manual Service - 87 As Needed As Needed Location Task Notes Change air filter Check water separator filter Adjust idler roller bearings Check battery Charge battery TR50 Check digging chain rollers, sidebars, pins, and bushings Check digging chain teeth and bits Check trencher headshaft sprocket bolts Replace digging chain Change Air Filter Change air filter when red band on indicator (1) is visible.
SK850 Operator’s Manual Service - 88 As Needed Check Water Separator Filter Drain water separator filter when red float ring is raised, indicating water in the filter. 1 1. Turn off at valve (1). 2. Unscrew drain plug (2) at bottom and drain water out. 3. Tighten drain plug. 4. Turn on at valve. 2 t43om023w.
SK850 Operator’s Manual Service - 89 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. Remove dust cap (1). 2. Ensure bearings are properly seated by tightening castle nut (2) to 30-40 ft•lb (40.754.2 N•m) while turning the hub (3). 4 1 5 IMPORTANT: Do not move the hub after this step is completed. 3. Loosen the castle nut (2). 3 2 t43om028w.eps 4. Hand-tighten the castle nut.
SK850 Operator’s Manual Service - 90 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. 3. Loosen and remove battery cable clamps carefully, negative (-) cable first. 4. Clean cable clamps and terminals to remove dull glaze. t43om021w.eps 5. Check for signs of internal corrosion in cables. 6.
SK850 Operator’s Manual Service - 91 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. • Use caution and wear personal protective equipment such as safety eyewear, when charging or cleaning battery. • Keep sparks, flames, and any ignition source away from batteries at all times.
Service - 92 SK850 Operator’s Manual 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. 3. Inspect battery in disabled vehicle (B) for signs of cracking, bulging, leaking, or other damage.
SK850 Operator’s Manual Service - 93 As Needed TR50 Check Digging Chain Rollers, Sidebars, Pins, and Bushings Perform periodic visual inspections of digging chain. Check for wear on rollers (1) and sidebars (2). Check pins and bushing wear by measuring distance (3) between chain pins and comparing it to new chain. NOTICE: • If sidebars are bending or getting loose on chain pins, use chain spacers to join sidebars. • Replace worn or broken chains. • Replace sprockets when new chain is installed.
Service - 94 SK850 Operator’s Manual 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). NOTICE: Replace sprockets when a new chain is installed. To remove chain: 1. Fasten and adjust seat belt. 2. Start unit. See page 50 for proper start-up procedures. 3.
SK850 Operator’s Manual Service - 95 As Needed To install digging chain: 1. Position digging chain on ground with teeth down and pointed toward unit. 2. Loop cable through end links. 3. Start engine. 4. Back unit up until digging chain extends past headshaft about 12” (30 cm). 5. Lower boom to horizontal position. 6. Stop engine. 7. Secure chain on sprocket booms by locking rear idler sprocket. 8. Pull rear end of chain over tail sprocket or roller. Pull cable until chain is in place on boom. 9.
SK850 Operator’s Manual Service - 96 As Needed Crushing weight could cause death or serious injury. Use proper procedures and equipment or stay away. 14. Unclamp links. Slowly release cable and lower chain to ground. 15. Lay chain on ground with teeth down. To install chain: 1. Lay chain on ground with teeth down and pointed toward unit. Loop cable through end links. 2. Fasten and adjust seatbelt. 3. Start tractor. See page 72 for start-up procedures. 4. Disengage parking brake. 5.
SK850 Operator’s Manual Specifications - 97 SK850 Basic Unit Specifications SK850 Basic Unit L H2 H A2 L2 W Dimensions U.S.
Specifications - 98 SK850 Operator’s Manual SK850 Basic Unit Dimensions U.S. Metric Bucket rollback angle, ground level 25° 25° Bucket rollback angle, full height 90° 90° Dump angle, standard bucket at max dump height 35° 35° Bucket width, max 44 in 1120 mm Bucket width, min 36 in 915 mm Swing radius, max, with standard bucket 65 in 1650 mm Swing radius, no attachment 44 in 1120 mm Rear overhang, max 29 in 735 mm Performance U.S.
SK850 Operator’s Manual Specifications - 99 SK850 Power Specifications SK850 Power Specifications Power U.S. Metric Engine: Yanmar® 3TNV88C, diesel, EPA Tier 4 Final, EU Stage IIIA Number of cylinders 3 Displacement 100.1 in3 1.64 L3 Bore 3.46 in 88 mm Stroke 3.54 in 90 mm Manufacturer’s gross power rating (per SAE J1955) 36.9 hp 27.5 kW Estimated net power rating (per SAE 1348) 35.1 hp 26.2 kW Rated engine speed 3000 rpm 3000 rpm Hydraulic System U.S.
Specifications - 100 SK850 Operator’s Manual SK850 withTR50 SK850 withTR50 Dimensions* U.S.
SK850 Operator’s Manual Support - 101 Procedure Support Procedure Notify your dealer immediately of any malfunction or failure of Ditch Witch® equipment. Always give model, serial number, and approximate date of your equipment purchase. This information should be recorded and placed on file by the owner at the time of purchase. Return damaged parts to dealer for inspection and warranty consideration if in warranty time frame.
SK850 Operator’s Manual Warranty - 102 Warranty Ditch Witch® Equipment and Replacement Parts Limited Warranty Policy Subject to the limitation and exclusions herein, free replacement parts will be provided at any authorized Ditch Witch dealership for any Ditch Witch equipment or parts manufactured by The Charles Machine Works, Inc. (CMW) that fail due to a defect in material or workmanship within one (1) year of first commercial use.
SK850 Operator’s Manual Service Record - 105 Service Record Service Performed Date Hours CMW®
Service Record - 106 Service Performed CMW® SK850 Operator’s Manual Date Hours
