Rubber Track Loader
15. Troubleshooting
15-3
Problem 8
Auxiliary hydraulic full-time direction switch operates but
part-time thumb switch will not operate.
Probable cause
1. Auxiliary hydraulic mode switch in wrong position or
faulty.
2. Auxiliary hydraulic thumb switch malfunction.
3. Poor wire connections at direction switch, thumb
switch, or pin connector P17.
Problem 9
Auxiliary hydraulics will only flow one way.
Probable cause
1. Auxiliary hydraulic relay 1 or 2 failure.
2. Auxiliary hydraulic pilot generation coil faulty.
3. Auxiliary hydraulic pilot generation spool faulty.
4. Poor wire connections at relay, pilot generation so-
lenoid, pin connector P16 or P21.
5. Loader valve malfunction.
Problem 10
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.
Problem 11
Battery will not charge and/or battery goes dead.
Probable cause
1. Alternator fuse blown.
2. Alternator diode bad.
3. Poor wire connections at battery, alternator, diode,
or fuse.
4. Excessive draw in off position.
a) Fuel gauge and hour meter should draw only
0.01 amps in off position.
5. Bad battery.
6. Bad alternator.
Problem 12
Loader control will not lock in float position.
Probable cause
1. Float magnet fuse blown.
2. Poor wire connections at fuse, float detent magnet,
or pin connector P18.
3. Faulty float detent magnet.
Problem 13
Loader will not float; labors engine and has down pressure
when detented into float.
Probable cause
1. Engine RPM too low.
a) Float must be operated at a minimum of half
throttle.
2. Low charge pressure.
3. Pilot control malfunction.
4. Loader valve malfunction.
Problem 14
Hot oil light illuminates; hydraulic system operating hot.
Probable cause
1. Auxiliary hydraulic switch activated sending oil over
relief.
2. Low oil level.
3. Debris plugging oil cooler limiting airflow.
4. Broken fan blades.
5. Loose fan belt.
6. Improper attachment.
a) Attachment must be rated at a minimum of 10
gallons per minute and 3000 PSI.
b) Attachment hose size must be a minimum of 3/8
inch.
7. Faulty hot oil sending unit.
a) Hot oil light should illuminate at 225°F.
8. Faulty quick coupler.
9. Cooler bypass relief.
a) Cooler bypass relief should open at 100 PSI.
Problem 15
Track makes popping noise.
Probable cause
1. Track too loose. (Refer to track adjustment section.)
2. Worn or stuck drive teeth. Outer roller should pivot
as lug comes into sprocket.
3. Loose or worn sprocket.
4. Worn track lugs.
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