Rubber Track Loader
13. Troubleshooting
13-2
Troubleshooting
This section identifies selected problems and sug-
gests probable causes.
Problem 1
Machine will not crank over.
Probable cause
1. Continuous high flow switch activated.
2. Continuous low flow switch activated.
3. Power quick-attach in the unlocked position.
4. Weak or dead battery.
5. Faulty continuous hyd. flow switch
6. Battery cables loose or corroded.
7. Ignition fuse blown.
8. Main starter fuse blown.
9. Starter relay malfunctioning.
10. Bad ignition switch.
11. Bad starter.
12. Poor wire connections at key, relay, or starter.
Problem 2
Machine cranks but will not start.
Probable cause
1. Injection pump fuse blown.
2. Main power fuse B blown.
3. Main power relay B not activating.
4. Poor wire connection at injection pump or fuse.
5. Glow plugs not heating. (Will see black smoke.)
a) Main glow plug fuse blown.
b) Glow plug relay not activating.
c) Poor wire connections at ignition switch, relay,
or glow plug strip.
d) Failed glow plugs.
e) Bad ignition switch.
Problem 3
Machine starts but hydraulics will not operate.
Probable cause
1. Lap bar must be in down position, operator must be
seated in seat, and front door (if installed) must be
closed.
2. Safety fuse blown.
3. Faulty operator presence switch.
a) Test continuity through seat, lap bar, and door
switch. Adjust or replace as necessary. Lap bar
and door switch are magnetic switches and
should be adjusted to approximately 1/16 inch
away from steel pickup bracket.
4. Poor ground (check ground wires on bottom left rear
side of hydraulic reservoir).
5. Safety relay is not activating.
6. Faulty safety solenoid or safety solenoid spool.
7. Poor wire connections on fuse, relay, or safety sole-
noid.
8. Low charge pressure.
Problem 4
Lift arms operate but tracks will not move.
Probable cause
1. Leak in feed line to pilot control.
2. Bad wire connection to DA Control Solenoid.
3. Pilot control malfunctioning.
4. Low charge pressure.
Problem 5
Tracks operate but lift arms will not operate.
Probable cause
1. Continuous hyd. flow switch activated, sending oil
over relief.
2. Check to see if auxiliary flow works. (If auxiliary
flow works, skip to number 5).
3. Main auxiliary relief malfunction.
4. Auxiliary pump bad.
5. Leak in feed line to loader control pilot.
6. Loader control pilot malfunctioning.
7. Loader valve malfunctioning.
Problem 6
Low or high auxiliary flow does not work. Lift arms do
work.
Probable cause
1. Auxiliary hydraulic fuse blown.
2. Faulty ground wire.
3. Auxiliary hydraulic switch failure.
4. Poor wire connections at fuse, auxiliary hyd. switch,
or pin connector P17.
5. Auxiliary hydraulic pilot generation spool stuck.
6. Bad or not fully connected Quick-Coupler.
7. Quick coupler block pressure release button stock in
the down position.
Problem 7
No power to numerous auxiliary functions or accessories
in ON or RUN position.
Probable cause
1. Main power relay A or B fuse blown.
2. Main relay A or B faulty.
3. Ignition switch malfunction.
4. Poor wire connections at ignition switch, fuse, or re-
lay.
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