SK750/SK755
Operator’s
Manual
CMW®
Issue 2.0
Original Translation
053-2570
SK750/SK755 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 . . . . . . . . . . . . . . . . . . . . . . . . . . 6
•
Bulleted Lists. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
•
Numbered Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
CMW®
SK750/SK755 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.
t35om034w.eps
Item
date of manufacture
date of purchase
unit serial number
engine serial number
CMW®
SK750/SK755 Operator’s Manual
Overview - 3
Intended Use
Intended Use
The SK750/SK755 is a platform, rubber track mini skid steer unit designed for light-to medium-duty
construction work. The SK750/SK755 has a quick attach mount plate which makes it easy for an operator
to connect different attachments. 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. Use in any other way is considered contrary to the
intended use.
The SK750/SK755 should be operated, serviced, and repaired only by persons familiar with its particular
characteristics and acquainted with the relevant safety procedures.
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. Modification of equipment should only be made by
competent personnel possessing knowledge of applicable standards, regulations, equipment design
functionality/requirements and any required specialized testing.
CMW®
SK750/SK755 Operator’s Manual
Overview - 4
Unit Components
Unit Components
1
t35om001w.eps
1. Operator station
2. Tracks
3. Engine compartment
4. Lift arms
5. Mount plate
CMW®
2
3
4
5
SK750/SK755 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
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CMW®
Overview - 6
SK750/SK755 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.
Numbered Lists
Numbered lists contain illustration callouts or list steps that must be performed in order.
CMW®
SK750/SK755 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. 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 published. For the latest information on Ditch Witch equipment, see your
Ditch Witch dealer.
Thank you for buying and using Ditch Witch equipment.
CMW®
Foreword - 8
SK750/SK755 Operator’s Manual
SK750/755
Operator’s Manual
Issue number 2.0 / OM-7/14
Part number 053-2570
Copyright 2012, 2014
by The Charles Machine Works, Inc.
, Ditch Witch, CMW, and Roto Witch are registered trademarks of The Charles
Machine Works, Inc.
CMW®
SK750/SK755 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
29
procedures for inspecting and classifying the jobsite, planning the installation path (if
needed), preparing the jobsite for work, and connecting attachments
Drive
37
procedures for startup, cold start, driving, and shutdown
Transport
41
procedures for lifting, hauling, and towing
Complete the Job
49
procedures for restoring the jobsite and rinsing and storing equipment
Service
51
service intervals and instructions for this machine including lubrication, replacement
of wear items, and basic maintenance
Specifications
71
machine specifications including weights, measurements, power ratings, and fluid
capacities
Support
75
the warranty policy for this machine, and procedures for obtaining warranty
consideration and training
Service Record
79
a record of major service performed on the machine
CMW®
Contents - 10
CMW®
SK750/SK755 Operator’s Manual
SK750/SK755 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
•
If a Fiber Optic Cable is Damaged . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
•
If Machine Catches on Fire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Safety Alert Classifications . . . . . . . . . . . . . . . . . . 17
Machine Safety Alerts . . . . . . . . . . . . . . . . . . . . . . 18
CMW®
Safety - 12
SK750/SK755 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. Mark proposed path with white paint prior to contacting One-Call or
utilities.
•
Classify jobsite based on its hazards and use correct tools and machinery, 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 may be present.
•
Contact your Ditch Witch dealer if you have any question about operation, maintenance, or equipment
use.
•
Complete the equipment checklist located at www.ditchwitch.com/resources/safety.
CMW®
SK750/SK755 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. 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. Many 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.
CMW®
Safety - 14
SK750/SK755 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.
CMW®
SK750/SK755 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.
•
Remove any ignition source(s), if this can be done safely and quickly.
•
Warn others that a gas line has been cut and that they should 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.
CMW®
Safety - 16
SK750/SK755 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.
•
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.
CMW®
SK750/SK755 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.
indicates a hazardous situation that, if not avoided, will result in death or serious injury. This
signal word is to be limited to the most extreme situations.
indicates a hazardous situation that, if not avoided, could result in death or serious injury.
indicates a hazardous situation that, if not avoided, could result in minor or moderate injury.
Watch for two other words: NOTICE and IMPORTANT.
NOTICE indicates information considered important, but not hazard-related (e.g., messages relating to
property damage).
IMPORTANT can help you do a better job or make your job easier in some way.
CMW®
SK750/SK755 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.
3
CMW®
274-442
SK750/SK755 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
8
or wear gloves.
275-355 (2-P)
Shut down engine before opening hood for
servicing and maintaining machine. 273-479
CMW®
Safety - 20
SK750/SK755 Operator’s Manual
Machine Safety Alerts
CMW®
SK750/SK755 Operator’s Manual
Controls - 21
Gauges and Indicators
Controls
Gauges and Indicators
1
6
2
7
8
3
9
4
5
10
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1. Glow plug button
6. Ignition switch
2. Engine coolant temperature gauge
7. Hourmeter
3. Engine oil pressure indicator
8. Engine coolant temperature indicator
4. Hydraulic fluid temperature indicator
9. Glow plug indicator
5. Hydraulic fluid level sight glass
10. Fuel gauge
CMW®
SK750/SK755 Operator’s Manual
Controls - 22
Gauges and Indicators
Item
Description
Notes
1. Glow plug button
To help start cold engine, turn
ignition switch to first position.
IMPORTANT: Press glow plug button
according to temperatures below.
Press glow plug button as
directed in notes.
•
If ambient temperature is below
40° F (4° C), press and hold
button for 5 seconds.
•
If ambient temperature is below
20° F (-7° C), press and hold
button for 10 seconds.
•
Do not press button for more than
20 seconds continuously.
c00ic108h.eps
2. Engine coolant
temperature gauge
Release button, then turn
ignition switch all the way
clockwise to start.
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.
4. Ensure radiator is clean.
3. Engine oil pressure
indicator
Lights when engine oil
pressure is low.
Engine will stop.
1. Check oil level.
Also lights briefly when
engine is started.
4. Hydraulic fluid
temperature indicator
Lights and alarm sounds
when hydraulic fluid is
overheating.
2. Check for leaks before starting
engine.
Check hydraulic fluid level.
Reduce load.
Ensure oil cooler is clean.
5. Hydraulic fluid sight
glass
CMW®
Shows level of hydraulic fluid
in tank. Maintain fluid at
halfway point on glass.
SK750/SK755 Operator’s Manual
Controls - 23
Gauges and Indicators
Item
Description
Notes
6. 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.
7. Hourmeter
Displays engine operating
time.
Use these times to schedule service.
8. Engine coolant
temperature indicator
Lights and alarm sounds
when engine coolant
temperature is too high.
1. Stop operation, set throttle to low
idle, and allow engine to cool.
2. Stop engine.
3. Check coolant level.
9. Glow plug indicator
Lights when ignition switch is
on and glow plug button is
pressed.
10. Fuel tank sight window
Shows level of fuel in tank.
NOTICE: Use low sulfur or ultra low
sulfur fuel only.
CMW®
SK750/SK755 Operator’s Manual
Controls - 24
Controls
Controls
1
5
2
6
3
7
4
t35om004w.eps
1. Left track drive control or
Track drive joystick (optional)
2. Right track drive control or
Track drive joystick (optional)
3. Throttle
4. Parking brake lever
CMW®
5. Lift arm control
6. Attachment drive control
7. Attachment drive foot control
SK750/SK755 Operator’s Manual
Controls - 25
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)l
To move forward, push.
To move backward, pull.
To go faster in either
direction, move control farther
from neutral.
To turn left, move right control farther
forward than left control.
To counter-rotate in either direction,
move controls in opposite directions
as indicated above.
To steer while moving forward, push
joystick forward, then move left or
right. Unit will gradually turn left or
right.
To steer while moving backward, pull
joystick back, then move left or right.
Unit will gradually turn left or right.
To stop, move to neutral.
For tight steering in low speed, move
joystick to center position then to left
or right side. Tracks will counter rotate
and turn unit in a tight circle.
3. Throttle
To increase engine speed,
push.
Increasing engine speed also
increases attachment speed.
To decrease engine speed,
pull.
CMW®
SK750/SK755 Operator’s Manual
Controls - 26
Controls
Item
Description
4. Parking brake lever
To engage, rotate lever
counterclockwise.
Notes
To disengage, rotate lever
clockwise.
c00ic662w.eps
5. Lift arm control
To move lift arms down, push.
To float, push forward to end.
IMPORTANT: Exercise caution when
lifting loads. See page 72 for
operating capacities.
To move lift arms up, pull.
To curl attachment up, move
to left.
To curl attachment down,
move to right.
6. Attachment drive
control
To engage attachment drive
in reverse, lift lever lock and
push forward.
To engage attachment drive
in forward, lift lever lock and
pull back.
7. Attachment drive foot
control
To hold attachment drive in
engaged position (forward or
reverse), lift lever lock, move
lever in desired direction, and
press pedal.
To return attachment drive
control to neutral, release
pedal.
CMW®
IMPORTANT:
•
Lever lock engages when control
is in neutral.
•
Use foot pedal to hold attachment
control in the on position when
hands are busy operating lift arm
or track drive controls.
IMPORTANT: Use foot pedal to hold
attachment control in the on position
when hands are busy operating lift
arm or track drive controls.
SK750/SK755 Operator’s Manual
Controls - 27
Engine Compartment
Engine Compartment
1
2
t35om016w.eps
1. Hydraulic Fluid Bypass
2. Auxiliary outlet
Item
Description
Notes
1. Hydraulic Fluid Bypass
To open bypass valve, pull
and rotate knob until it seats
in the open position.
IMPORTANT:
Start engine and run five
minutes to warm hydraulic
fluid.
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2. Auxiliary power outlet
•
Use the hydraulic fluid bypass to
assist starting a cold engine.
•
Tool carrier and attachment will
not operate correctly when knob
is pulled out.
To close bypass valve, rotate
knob until it seats in the
closed position.
To operate work lights or
other 12V devices, plug into
outlet.
CMW®
SK750/SK755 Operator’s Manual
Controls - 28
Tool Carrier
Tool Carrier
1. Level indicator
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.
CMW®
SK750/SK755 Operator’s Manual
Prepare - 29
Prepare
Chapter Contents
Gather Information . . . . . . . . . . . . . . . . . . . . . . . . . 30
•
All Jobs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
•
Ground-Penetrating Jobs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
•
Above-Ground Jobs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Inspect Site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
•
Identify Hazards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Classify Jobsite . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
•
Inspect Jobsite . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
•
Select a Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
•
Apply Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Check Supplies and Prepare Equipment . . . . . . . 34
•
Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
•
Fluid Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
•
Condition and Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
•
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Connect Attachment . . . . . . . . . . . . . . . . . . . . . . . 35
CMW®
Prepare - 30
SK750/SK755 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.
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.
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.
Ground-Penetrating Jobs
Notify One-Call Services
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.
Above-Ground Jobs
Locate Overhead Lines
Note location and height of all overhead lines in jobsite and ensure that fully lifted attachment and/or load
will not touch lines.
CMW®
SK750/SK755 Operator’s Manual
Prepare - 31
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 32.)
•
traffic
•
access
•
soil type and condition
Identify Hazards
Identify safety hazards and classify jobsite if attachment will penetrate ground. See “Classify Jobsite” on
page 32.
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.
•
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.
CMW®
Prepare - 32
SK750/SK755 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.
•
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.
•
Have an experienced locating equipment operator sweep area within 20’ (6 m) to each side of work
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 or granite which is capable of producing crystalline silica
(quartz) dust
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.
CMW®
SK750/SK755 Operator’s Manual
Prepare - 33
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
Cutting, drilling, or working materials such as concrete, sand, or rock containing quartz may result in
exposure to silica dust. Use water spray or other means to control dust. If workers are exposed to dust
they must wear appropriate breathing protection. Silica dust may cause lung disease and is known to the
State of California to cause cancer.
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.
CMW®
Prepare - 34
SK750/SK755 Operator’s Manual
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 57.)
•
filters (air, oil, hydraulic)
•
tracks
•
pumps and motors
•
hoses and valves
•
signs, guards, and shields
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
requirements.
CMW®
SK750/SK755 Operator’s Manual
Prepare - 35
Connect Attachment
Connect Attachment
NOTICE: Use only Ditch Witch-approved attachments. Attachments can change the stability and
operating characteristics of the unit.
Attachment
IMPORTANT: Before connecting attachment to unit,
ensure that mount and receiver plates are free of dirt
and debris.
1. Position attachment on level surface with enough
space behind it to accommodate unit.
2. Ensure that lock pin handles (shown) on mount
plate are turned away from center of attachment.
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3. Start engine.
4. Tilt mount plate (2) forward.
2
5. Position mount plate in the upper lip of the receiver
plate (1) on attachment.
1
6. Raise lift arms while tilting back mount plate.
IMPORTANT: Attachment should be raised
enough to clear the ground. Mount plate
should be tilted back fully.
7. Turn ignition switch off and remove key.
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Read operator’s manual. Know how to use all controls
before operating machine. When you see this sign
on the machine or
in the manual, read it and use caution. Your safety is at stake.
To help avoid injury: Ensure proper connection by verifying that bottoms
of lock pins are visible under attachment receiver plate (shown).
8. Rotate lock pin handles toward center of mount plate
to secure attachment to lift plate.
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CMW®
SK750/SK755 Operator’s Manual
Prepare - 36
Connect Attachment
Hydraulic Hoses
If attachment requires hydraulic power for operation, connect hydraulic hoses.
Pressurized fluid or air could pierce skin and cause injury
or death. Stay away.
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.
Lower, block, or support any raised component with a hoist. Cover connection with heavy cloth and
loosen connector nut slightly to relieve residual pressure. Catch all fluid in a container.
•
Before using system, check that all connections are tight and all lines are undamaged.
•
Use a piece of cardboard or wood, rather than hands, to search for leaks.
•
Wear protective clothing, including gloves and eye protection.
•
If you are injured, seek immediate medical attention from a doctor familiar with this type of injury.
Hot parts may cause burns. Do not touch until cool.
To help avoid injury: Wear gloves when connecting and disconnecting
hydraulic hoses and wait until unit has cooled before touching hydraulic
components.
1. Cycle attachment drive control to relieve
residual pressure at hydraulic couplers.
2. Remove dirt and debris from hydraulic
couplers.
1
3. Connect male coupler on attachment to female
coupler (3) on unit.
2
4. Connect female coupler on attachment to male
coupler (1) on unit.
3
5. If needed, connect attachment case drain hose
to case drain connector (2).
6. Ensure that connections are secure by pulling
on hoses.
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CMW®
SK750/SK755 Operator’s Manual
Drive - 37
Drive
Chapter Contents
Start Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Shut Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
CMW®
SK750/SK755 Operator’s Manual
Drive - 38
Start Unit
Start Unit
1. Ensure all controls are in neutral.
2. If necessary, use glow plugs and/or hydraulic fluid bypass control to warm cold engine. See “Hydraulic
Fluid Bypass” on page 27.
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. High load can cause tipping, loss of load or loss of
visibility.
• Never jerk control levers. Use a steady even motion.
• See page 72 for tip capacity.
1. Disengage parking brake.
2. Pull lift arm control to raise mount plate (and attachment) off ground.
3. Move track drive control to steer unit. See page 25.
IMPORTANT: If needed for attachment operation, push attachment drive foot control to hold
attachment control in the forward position while operating track drive and lift arm controls.
4. Adjust throttle as needed.
5. See attachment operation manual for instructions regarding proper operation of attachments.
CMW®
SK750/SK755 Operator’s Manual
Drive - 39
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.
• Do not park unit on slope without lowering attachment to the ground,
returning all controls to neutral position, shutting down unit, and applying
parking brake.
• See “Tipping capacity” on page 72.
Operating safely on a slope depends upon many factors including:
•
Distribution of machine weight, including front loading and absence of load
•
Height of load
•
Even or rough ground conditions
•
Potential for ground giving way causing unplanned tilt forward, reverse or sideways
•
Nearness of ditches, ruts, stumps or other obstructions and sudden changes in slope
•
Speed
•
Turning
•
Braking performance
•
Operator skill
These varying factors make it impractical to specify a maximum safe operating angle in this manual. It is
therefore important for the operator to be aware of these conditions and adjust operation accordingly.
Maximum engine angle and braking performance are two absolute limits which must never be exceeded.
These maximums are stated below since they are design limits. These design limits usually exceed the
operating limits and must never be used alone to establish safe operating angle for variable
conditions.
Maximum engine lubrication angle – 20°
Maximum service brake retarding force – equal to traction of both tracks.
Maximum park brake holding force – equal to traction of one track.
CMW®
Drive - 40
SK750/SK755 Operator’s Manual
Shut Down
Shut Down
1. Lower lift arms to ground.
2. Move all controls to neutral position.
3. Apply parking brake.
4. Run engine at low idle for five minutes to cool.
NOTICE: Failure to allow engine to cool before shutdown may damage turbocharger.
5. Turn ignition switch to STOP.
6. Remove key.
CMW®
SK750/SK755 Operator’s Manual
Transport - 41
Transport
Chapter Contents
Lift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
•
Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
•
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Haul . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
•
Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
•
Tie Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
•
Unload . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
Tow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
CMW®
Transport - 42
SK750/SK755 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.
CMW®
SK750/SK755 Operator’s Manual
Transport - 43
Lift
Procedure
Use a hoist capable of supporting the
equipment's size and weight. See
“Specifications” on page 71 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.
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CMW®
SK750/SK755 Operator’s Manual
Transport - 44
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.
•
To help prevent trailer sway, load trailer so that ten to fifteen percent of total vehicle weight
(equipment plus trailer) is on tongue.
•
If loading onto tilt-bed trailer, be prepared for trailer to tilt.
•
Move all controls to neutral position when stopped.
1. Disengage parking brake.
2. Start engine.
3. Adjust throttle to low speed.
4. Pull lift arm control to raise mount plate (and attachment) clear of trailer, but keep it low.
5. Move unit to rear of trailer and align with ramps.
6. Drive forward slowly to move unit onto trailer until tiedown position is reached.
7. Push lift arm control to lower mount plate (and attachment) to trailer bed.
8. Engage parking brake.
9. Ensure that all controls are in neutral position.
10. Turn ignition switch to STOP.
11. Tie down unit.
CMW®
SK750/SK755 Operator’s Manual
Transport - 45
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.
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CMW®
SK750/SK755 Operator’s Manual
Transport - 46
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. Disengage parking brake.
4. Start engine.
5. Pull lift arm control to raise mount plate (and attachment) off ground, but keep it low.
6. Adjust throttle to low speed and slowly back unit down trailer or ramps.
CMW®
SK750/SK755 Operator’s Manual
Transport - 47
Tow
Tow
Read operator’s manual. Know how to use all controls
before operating machine. When you see this sign
on the machine or
in the manual, read it and use caution. Your safety is at stake.
Under normal conditions, unit should not be towed. If unit breaks down and towing is necessary:
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rear tow point
•
attach chains to tow points facing towing vehicle
•
tow for short distances at less than 1 mph (1.6 km/h)
•
do not tow for more than 100’ (30 m)
•
use no more than 1,300 lb (5800 N) of towing force
•
open bypass valve on each pump section
front tow point
NOTICE: When bypass valve is open, unit has no brakes.
•
disengage parking brake
CMW®
Transport - 48
SK750/SK755 Operator’s Manual
Tow
Prepare Unit for Towing
1. Block tracks.
2. Engage parking brake (shown).
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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.
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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. Unblock tracks.
CMW®
SK750/SK755 Operator’s Manual
Complete the Job - 49
Complete the Job
Chapter Contents
Rinse Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Disconnect Attachment . . . . . . . . . . . . . . . . . . . . . 50
Stow Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
CMW®
Complete the Job - 50
SK750/SK755 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. Disengage lock pins by turning handles away from center of attachment.
4. Cycle attachment drive control and disconnect hydraulic hoses, if used.
5. Start engine.
6. Tilt mount plate forward and back unit away from attachment.
Stow Tools
Make sure all tools and accessories are loaded and properly secured on trailer.
CMW®
SK750/SK755 Operator’s Manual
Service - 51
Service
Chapter Contents
Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Recommended Lubricants/Service Key . . . . . . . . 53
Engine Oil Temperature Chart . . . . . . . . . . . . . . . 54
10 Hour . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
50 Hour . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
200 Hour. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
500 Hour . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
2000 Hour . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
As Needed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
CMW®
SK750/SK755 Operator’s Manual
Service - 52
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.
Welding Precaution
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NOTICE: Welding can damage electronics.
•
Disconnect battery to prevent damage to battery. Do not turn off battery disconnect switch with
engine running, 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 Engine Control Unit ground connection from the frame, harness connections
to the ECU, and other electronic components prior to welding on machine or attachments.
CMW®
SK750/SK755 Operator’s Manual
Service - 53
Overview
Overview
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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 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 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 71.
For more information on engine lubrication and maintenance, see your engine manual.
IMPORTANT: Use the “Service Record” on page 79 to record all required service to your machine.
CMW®
SK750/SK755 Operator’s Manual
Service - 54
Engine Oil Temperature Chart
Engine Oil Temperature Chart
Temperature range anticipated before next oil change
For more information on engine lubrication and maintenance, see your engine manual.
Approved Coolants
This unit was filled with John Deere Cool-Gard coolant before shipment from factory. Add only Cool-Gard
(p/n 255-006) or any fully-formulated, ethylene glycol based, low-silicate, heavy-duty diesel engine coolant
meeting ASTM specification D5345 (prediluted) or D4985 (concentrate). Before using any other kind of
coolant, completely flush radiator.
NOTICE: Do not mix heavy-duty diesel engine coolant and automotive-type coolant. This will lead
coolant breakdown and engine damage.
CMW®
SK750/SK755 Operator’s Manual
Service - 55
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 (0.05%) or less. Use LSD or ultra low sulfur fuel
(ULSD) only. Using fuels with higher sulfur content will affect exhaust emissions. Such action is a
violation of the US Clean Air Act and US EPA regulations and will result in fines.
•
For machines operated outside the U.S.: Fuel sulfur content should be less than 5000 ppm (0.05%).
Worldwide fuel sulfur regulations vary widely. Fuel used should always comply with local
regulations. If fuel sulfur content exceeds 5000 ppm, use a lube oil meeting API CF (or equivalent)
with a TBN value of 10 or greater. Do not use lube oils meeting API CJ-4 (or other low SAPS
equivalent) under any conditions.
Biodiesel blends up to 5% (B5) are approved for use in this unit. The fuel must meet the specifications for
diesel fuel shown above. In certain markets, higher blends may be used if certain steps are taken. Extra
attention is needed when using biodiesel, especially when operating in cold weather or storing fuel.
Contact your Ditch Witch dealer or the engine manufacturer for more information.
CMW®
SK750/SK755 Operator’s Manual
Service - 56
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
Check Engine Oil Level
Check engine oil level at dipstick opening (1) at
startup and every 10 hours. Oil level should be at
top of marking. If low, add DEO at fill (2). Check
with unit on level surface and at least 15 minutes
after stopping engine.
2
1
IMPORTANT: Use oil specified in “Engine Oil
Temperature Chart” on page 54.
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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 67.
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CMW®
SK750/SK755 Operator’s Manual
Service - 57
Startup/10 Hour
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
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Check Brake Operation
Check brake operation at startup and every 10
hours or more often when conditions warrant.
•
Ensure parking brake pin(shown) moves
freely allowing brake to be engaged and
disengaged.
•
Clean mud and debris from area around pin.
Check Lug Nut Torque
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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.
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CMW®
Service - 58
SK750/SK755 Operator’s Manual
Startup/10 Hour
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 edges (2) is 1/2 in (13 mm).
1
To adjust:
1. Park machine on smooth flat surface.
2. Lay straight edge on top of track, spanning
from sprocket to front idler roller.
3. Clean track cylinder zerk (1). Pump MPG into
zerk until distance between track and straight
edge (2) is 1/2” (13 mm).
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4. Test: Drive forward one track length and
check tension again.
•
If tension is too loose, repeat step 3
above.
•
If tension is too tight, loosen fitting on
grease cylinder and allow a small
amount of grease to discharge from
cylinder. Tighten fitting and test again.
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 54 for information on
approved coolants.
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CMW®
2
SK750/SK755 Operator’s Manual
Service - 59
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. Catch all fluid in a container.
•
Before using system, check that all connections are tight and all lines are undamaged.
•
Use a piece of cardboard or wood, rather than hands, to search for leaks.
•
Wear protective clothing, including gloves and eye protection.
•
If you are injured, seek immediate medical attention from a doctor familiar with this type of injury.
Check hydraulic hoses for leaks at startup and
every 10 hours.
CMW®
SK750/SK755 Operator’s Manual
Service - 60
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)
Change Engine Oil and Filter (Initial)
Change engine oil after 50 hours. Drain oil (1)
and add 4.2 qt (4 L) of DEO at fill (2).
IMPORTANT: Use oil specified in “Engine Oil
Temperature Chart” on page 54.
1
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2
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CMW®
SK750/SK755 Operator’s Manual
Service - 61
50 Hour
Change Hydraulic Filter (initial)
Change hydraulic filter after 50 hours.
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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.
If the clamp is loose, apply oil to the threads and
retighten it. If the hose is worn, replace it.
Bleed the fuel system if the hose and/or clamp is
changed.
CMW®
Service - 62
SK750/SK755 Operator’s Manual
50 Hour
Check Radiator/Fluid Cooler
Check radiator/hydraulic fluid cooler for dirt,
grass, and other foreign matter every 50 hours.
Clean out with compressed air or spray wash if
required. Be careful not to damage fins with highpressure air or water. Check more often if
operating in dusty or grassy conditions.
Check radiator hoses for wear. Check hose
clamps for proper tightness.
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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.
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CMW®
SK750/SK755 Operator’s Manual
Service - 63
200 Hour
200 Hour
Location
Task
Notes
Change engine oil and filter
4.2 qt (4 L) 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)
Change Engine Oil and Filter
Change engine oil and filter every 200 hours.
Drain oil, change filter (shown) and add 4.2 qt (4
L) of DEO at fill. See page 60.
IMPORTANT: Use oil specified in “Engine Oil
Temperature Chart” on page 54.
Check Intake Air Line
Check the intake air line every 200 hours.
NOTICE: Keep dust out of the intake air line to
prevent damage to the engine.
If the clamp is loose, apply oil to the threads and
retighten it.
If the hose appears cracked or worn, replace it.
CMW®
Service - 64
SK750/SK755 Operator’s Manual
200 Hour
Change Hydraulic Filter
Change hydraulic filter every 200 hours.
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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.
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CMW®
SK750/SK755 Operator’s Manual
Service - 65
500 Hour
500 Hour
Location
Task
Notes
Change fuel filters
Change hydraulic fluid and filter
Change Fuel Filters
Change filters every 500 hours. If you refuel from
cans, replace filters more often.
The canister filter is located in the engine
compartment. The inline filter is located under the
control console.
See parts manual or contact your Ditch Witch
dealer for correct replacement filter.
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CMW®
SK750/SK755 Operator’s Manual
Service - 66
2000 Hour
Change Hydraulic Fluid and Filter
Change hydraulic fluid and filter every 500 hours.
Change every 250 hours if jobsite temperature
exceeds 100°F (38°C) more than 50% of the
time.
1. Remove drain plug (3).
1
2
2. Drain fluid and replace plug.
3. Change filter. See page 64.
4. Add THF at fill (1) until fluid level is at halfway
point on sight glass (2). Capacity is 9.2 gal
(35 L).
3
t35om029w.eps
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 54 for list of approved coolants.
2
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CMW®
SK750/SK755 Operator’s Manual
Service - 67
As Needed
As Needed
Location
Task
Notes
Change air filter
Check battery
Charge battery
Change Air Filter
Change air filter when red band on indicator (1) is
visible. Replace safety element (4) every third
change of primary filter (3) or any time primary
element has become damaged.
3
1
1. Open air filter housing at latches (2).
2
2. Remove primary element (3).
3. Wipe inside of housing and end cup (2).
4. Insert new primary element.
5. Latch air filter case.
6. Reset air filter service indicator (1).
4
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CMW®
SK750/SK755 Operator’s Manual
Service - 68
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.
5. Check for signs of internal corrosion in cables.
6. Apply MPG to terminals after cleaning to reduce corrosion.
7. Connect battery cable clamps, positive (+) cable first.
8. Tighten any loose connections.
9. Ensure that battery tiedowns are secure.
10. Turn battery disconnect switch to the on position.
Explosion possible. Serious injury or equipment damage could occur.
Follow directions carefully.
To help avoid injury: Do not create sparks and do not short across battery terminals for
any reason.
CMW®
SK750/SK755 Operator’s Manual
Service - 69
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. Internal contents are
extremely hazardous. Leaking fluid is corrosive. Battery may be explosive at higher temperatures.
•
NEVER lean over battery when making connections.
•
Do not allow vehicles to touch when charging.
•
Do not attempt to charge a battery that is leaking, bulging, heavily corroded, frozen, or otherwise
damaged.
•
NEVER short-circuit battery terminals for any reason or strike battery posts or cable terminals.
•
Refer to MSDS for additional information regarding this battery.
Before You Start
Electronic components can be easily damaged by electrical surges. Jump starting can damage electronics
and electrical systems, and is not recommended. Try to charge the battery instead. Use quality large
diameter jumper cables capable of carrying high currents (400 amps or more). Cheap cables may not allow
enough current flow to charge a dead/discharged battery.
Read all steps thoroughly and review illustration before performing procedure.
CMW®
Service - 70
SK750/SK755 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.
Connect red positive (+) jumper cable clamp to positive (+) post (2) of battery in disabled vehicle first.
IMPORTANT: Some equipment may have a positive jumper cable terminal (1) located externally.
If so equipped, connect red positive (+) jumper cable clamp to terminal.
4. Connect the other red positive (+) jumper cable clamp to positive (+) post of battery (A) in the service
vehicle.
5. Connect black negative (-) cable clamp to negative (-) post of battery (A) in service vehicle.
6. Connect the other black negative (-) cable clamp to the engine or frame ground on the disabled
vehicle, at least 12” (305 mm) from the failed battery, as shown.
7. Operate service vehicle engine at 1500-2000 rpm for a few minutes to build an electrical charge in the
failed battery.
8. Stop engine in service vehicle.
9. Remove jumper cables from the service vehicle, black negative (-) clamp first. Do not allow clamps to
touch.
10. Remove black negative (-) cable clamp from the disabled engine or frame ground first.
11. Remove red positive (+) cable clamp from the disabled vehicle positive (+) battery post last.
12. Reconnect machine controller and try to start disabled vehicle.
If the disabled vehicle did not start, check for loose or corroded battery cable connections. Poor
connections will prevent current from charging the failed battery. Clean terminals and posts if necessary
and repeat steps above.
CMW®
SK750/SK755 Operator’s Manual
Specifications - 71
SK750/SK755 Basic Unit
Specifications
SK750/SK755 Basic Unit
L
H2
H
A2
L2
W
Dimensions
U.S.
Metric
H2
Hinge pin height, max
81 in
2057 mm
Operating height, max, standard bucket
103 in
2615 mm
H
Overall height of machine
57 in
1450 mm
L
Overall length of loader, no attachment
86 in
2190 mm
Overall length of machine, with standard bucket
105 in
1670 mm
L2
Wheelbase/track length
43 in
1092 mm
A2
Angle of departure
27°
27°
Ground clearance, min (center/side)
8.9 in / 3.7 in
170 mm /
124 mm
Track width, max
42 in
1065 mm
Track width, min
36 in
914 mm
Unit width, excluding tracks
35 in
890 mm
Dump height, max, with standard bucket
64 in
1626 mm
Reach, standard bucket at max dump height
17 in
430 mm
W
CMW®
Specifications - 72
SK750/SK755 Operator’s Manual
SK750/SK755 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.
Metric
Ground drive speed, forward and reverse
4.7 mph
7.6 km/h
Ground pressure, 7” (180 mm) tracks *
4.8 psi
0.33 bar
Ground pressure, 9” (230 mm) tracks *
3.8 psi
0.26 bar
Tipping capacity
2285 lb
1039 kg
Operating capacity (35% of tipping capacity)
800 lb
364 kg
Machine weight (no attachment, fluids full)
2890 lb
1314 kg
The rated operating capacity for this machine was determined using a standard bucket in
the drive position with center of gravity 7 in (18 cm) from the mounting plate. Depending
on the attachment, the actual operating capacity of the attachment may vary.
* Includes machine weight, 175-lb (80-kg) bucket, 165-lb (75-kg) operator
Battery
SAE reserve capacity 110 min, SAE cold crank @ 0°F (-18°C) 800 amp, 12V electrical system
Fluid Capacities
U.S.
Metric
Fuel tank
10.5 gal
40 L
Engine oil, with filter
4.2 qt
4L
Hydraulic reservoir
9.2 gal
35 L
Specifications are called out according to SAE recommended practices. Specifications are general and subject to change without
notice. If exact measurements are required, equipment should be weighed and measured. Due to selected options, delivered
equipment may not necessarily match that shown.
CMW®
SK750/SK755 Operator’s Manual
Specifications - 73
SK750 Power Specifications
SK750 Power Specifications
Power
U.S.
Metric
Engine: Kubota D1105, diesel, EPA Tier 4, EU Stage IIIa
Number of cylinders
3
Displacement
68.5 in3
1.12 L
Bore
3.07 in
78 mm
Stroke
3.09 in
78.4 mm
Manufacturer’s gross power rating (per SAE J1955)
23.1 hp
17.2 kW
Estimated net power rating (per SAE 1348)
31.5 hp
23.5 kW
Rated engine speed
3000 rpm
3000 rpm
Hydraulic System
U.S.
Metric
Flow rate (pump 1)
6.5 gpm
24 L/min
Flow rate (pump 2)
5.5 gpm
21 L/min
Pressure
3000 psi
207 bar
Flow rate
13.9 gpm
52 L/min
Pressure
3500 psi
241 bar
Auxiliary: double gear pump
Ground drive: dual hydrostat
Noise Levels
Operator 87 dBA sound pressure per ISO 6394
Exterior 100 dBA sound power per ISO 6393
Vibration Level
Average vibration transmitted to the operator’s hand during normal operation with a loader bucket is
4.31 m/sec2. Average vibration transmitted to the whole body during normal operation with a loader
bucket is 1.07 m/sec2. Actual vibration will depend upon the attachment being used.
Specifications are called out according to SAE recommended practices. Specifications are general and subject to change without
notice. If exact measurements are required, equipment should be weighed and measured. Due to selected options, delivered
equipment may not necessarily match that shown.
CMW®
SK750/SK755 Operator’s Manual
Specifications - 74
SK755 Power Specifications
SK755 Power Specifications
Power
U.S.
Metric
Engine: Kubota D1105-T, diesel, EPA Tier 4, EU Stage IIIa
Number of cylinders
3
Displacement
68.5 in3
1.12 L
Bore
3.07 in
78 mm
Stroke
3.09 in
78.4 mm
Manufacturer’s gross power rating (per SAE J1955)
32.8 hp
24.5 kW
Estimated net power rating (per SAE 1348)
31.5 hp
23.5 kW
Rated engine speed
3000 rpm
3000 rpm
Maximum tilt angle, fore and aft
30°
30°
Maximum tilt angle, side to side
30°
30°
* Exceeding these operating angles will cause engine damage. This DOES NOT imply that the machine is stable to maximum
angle of safe engine operation.
Hydraulic System
U.S.
Metric
Flow rate (pump 1)
8.0 gpm
30 L/min
Flow rate (pump 2)
5.5 gpm
21 L/min
Pressure
3000 psi
207 bar
Flow rate
13.9 gpm
52 L/min
Pressure
3500 psi
241 bar
Auxiliary: double gear pump
Ground drive: dual hydrostat
Noise Levels
Operator 87 dBA sound pressure per ISO 6394
Exterior 101 dBA sound power per ISO 6393
Vibration Level
Vibration at the operator’s hand during normal operation is 4.31 m/sec2
Vibration at the operator’s foot during normal operation is 1.07 m/sec2
Specifications are called out according to SAE recommended practices. Specifications are general and subject to change without
notice. If exact measurements are required, equipment should be weighed and measured. Due to selected options, delivered
equipment may not necessarily match that shown.
CMW®
SK750/SK755 Operator’s Manual
Support - 75
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.
Order genuine Ditch Witch replacement or repair parts from your authorized Ditch Witch dealer. Use of
another manufacturer's parts may void warranty consideration.
Resources
Publications
Contact your Ditch Witch dealer for publications and videos covering safety, operation, service, and repair
of your equipment.
Ditch Witch® Training
For information about on-site, individualized training, contact your Ditch Witch dealer.
CMW®
SK750/SK755 Operator’s Manual
Warranty - 76
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. Free labor will be provided at any authorized Ditch Witch dealership for
installation of parts under this warranty during the first year following “initial commercial” use of the serial-numbered Ditch Witch
equipment on which it is installed. The customer is responsible for transporting their equipment to an authorized Ditch Witch
dealership for all warranty work.
Exclusions from Product Warranty
•
All incidental or consequential damages.
•
All defects, damages, or injuries caused by misuse, abuse, improper installation, alteration, neglect, or uses other than those for
which products were intended.
•
All defects, damages, or injuries caused by improper training, operation, or servicing of products in a manner inconsistent with
manufacturer’s recommendations.
•
All engines and engine accessories (these are covered by original manufacturer’s warranty).
•
Tires, belts, and other parts which may be subject to another manufacturer’s warranty (such warranty will be available to
purchaser).
•
ALL IMPLIED WARRANTIES NOT EXPRESSLY STATED HEREIN, INCLUDING ANY WARRANTY OF FITNESS FOR A
PARTICULAR PURPOSE AND MERCHANTABILITY.
IF THE PRODUCTS ARE PURCHASED FOR COMMERCIAL PURPOSES, AS DEFINED BY THE UNIFORM COMMERCIAL
CODE, THEN THERE ARE NO WARRANTIES WHICH EXTEND BEYOND THE FACE HEREOF AND THERE ARE NO IMPLIED
WARRANTIES OF ANY KIND WHICH EXTEND TO A COMMERCIAL BUYER. ALL OTHER PROVISIONS OF THIS LIMITED
WARRANTY APPLY INCLUDING THE DUTIES IMPOSED.
Ditch Witch products have been tested to deliver acceptable performance in most conditions. This does not imply they will deliver
acceptable performance in all conditions. Therefore, to assure suitability, products should be operated under anticipated working
conditions prior to purchase.
Defects will be determined by an inspection within thirty (30) days of the date of failure of the product or part by CMW or its authorized
dealer. CMW will provide the location of its inspection facilities or its nearest authorized dealer upon inquiry. CMW reserves the right
to supply remanufactured replacements parts under this warranty as it deems appropriate.
Extended warranties are available upon request from your local Ditch Witch dealer or CMW.
Some states do not allow exclusion or limitation of incidental or consequential damages, so above limitation of exclusion may not
apply. Further, some states do not allow exclusion of or limitation of how long an implied warranty lasts, so the above limitation may
not apply. This limited warranty gives product owner specific legal rights and the product owner may also have other rights which vary
from state to state.
For information regarding this limited warranty, contact CMW’s Product Support department, P.O. Box 66, Perry, OK 73077-0066, or
contact your local Ditch Witch dealer.
First version: 1/91; Latest version: 11/11
CMW®
SK750/SK755 Operator’s Manual
Service Record - 79
Service Record
Service Performed
Date
Hours
CMW®
Service Record - 80
Service Performed
CMW®
SK750/SK755 Operator’s Manual
Date
Hours
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