Terex PT100G Forestry, Service Manual

Page: 118 / 142

Problem 2:
Machine cranks, but will not start.
Possible causes
1. Engine ECU fuse blown.
2. Fuel tank empty, fuel filter plugged or fuel line
restricted.
3. Battery discharged (engine rotates slowly).
If the possible causes found here do not appear to
address your problem, refer to the:
• Perkins Engine Service Tool
• Control system troubleshooting guide (pg. 18-4)
Problem 3:
Machine starts, but hydraulics will not operate.
Possible causes
1. Operator not in seat.
2. Seat belt not fastened.
If the possible causes found here do not appear to
address your problem, refer to the:
• Control system troubleshooting guide (pg. 18-4)
• PT-100G Service Tool (chapter 19)
Problem 4:
Lift arm/bucket controls are operational, but tracks
will not move.
Possible causes
1. Parking brake switch in on position.
2. Low charge pressure.
If the possible causes found here do not appear to
address your problem, refer to the:
• Control system troubleshooting guide (pg. 18-4)
• PT-100G Service Tool (chapter 19)
Problem 5:
Tracks are operational, but lift arms will not move.
Possible causes
1. Continuous hydraulic flow switch activated, sending
oil over relief. (lift arms work, but move slowly)
If auxiliary flow hydraulics work check for:
a) Lift arm control valve assembly malfunction.
If auxiliary flow hydraulics do not work check for:
a) Main auxiliary relief malfunction (check pres-
sures).
If the possible causes found here do not appear to
address your problem, refer to the:
• Control system troubleshooting guide (pg. 18-4)
• PT-100G Service Tool (chapter 19)
Problem 6:
Lift arms are operational, but high/low flow auxil-
iary circuits are not.
Possible causes
1. Faulty or improperly connected quick coupler.
2. Quick coupler block pressure release stuck in down
(open) position.
If the possible causes found here do not appear to
address your problem, refer to the:
• Control system troubleshooting guide (pg. 18-4)
• PT-100G Service Tool (chapter 19)
Problem 7:
Multiple switches/electrical accessories are not
operational in ON or RUN position.
Possible causes
1. Power A or B fuse blown.
2. Faulty power relay (A or B).
If the possible causes found here do not appear to
address your problem, refer to the:
• Control system troubleshooting guide (pg. 18-4)
• PT-100G Service Tool (chapter 19)
Problem 8:
Battery will not charge/maintain charge.
Possible causes:
1. Loose alternator belt.
2. Loose, broken or disconnected wiring at battery,
alternator, diode or fuse.
3. Excessive current draw with key in "off" position.
4. Faulty battery.
5. Faulty alternator.
If the possible causes found here do not appear to
address your problem, refer to the:
• Control system troubleshooting guide (pg. 18-4)
• PT-100G Service Tool (chapter 19)
18-2
Compact Track Loader
18. Troubleshooting