Engine/Machine Troubleshooting - Terex PT-100G Forestry Service Manual

Problem 9:
Hydraulic oil temperature elevated; hydraulic sys-
Possible causes
tem overheating.
1. Debris plugging oil cooler, limiting airflow.
2. Low hydraulic oil level.
3. Loose or missing fan belt.
4. Damaged or missing cooling fan blades.
5. Incompatible attachment.
a) Attachment must match machine flow capabili
ties.
b) Attachment hose inside diameter must be at
least ½" (1.3 cm) for low flow and ¾" (1.9 cm)
for high flow.
6. Faulty hydraulic oil temperature sending unit.
7. Faulty quick coupler.
8. Cooler bypass relief open.
9. Damaged or missing brush ring (around fan).
10. Aftermarket (non-OEM) shrouding or guarding
installed in or around engine compartment
(obstructing airflow).
11. Auto-Reversing fan malfunction (see control system
troubleshooting to address possible faults).
Note: Cooler bypass should open at 80 PSI / 552 kPa.
Problem 10:
Engine coolant temperature elevated; engine over-
Possible causes:
heating.
1. Low coolant level.
2. Debris plugging radiator, limiting airflow.
3. Damaged or missing cooling fan blades.
4. Loose or missing fan belt.
5. Thermostat stuck in closed position.
6. Damaged or missing brush ring (around fan).
7. Aftermarket (non-OEM) shrouding or guarding
installed in or around engine compartment
(obstructing airflow).
8. Auto-Reversing fan malfunction (see control system
troubleshooting to address possible faults).

Engine/Machine Troubleshooting

When a problem occurs that effects engine perform-
ance or function, it is important to determine whether
or not the problem lies with the machine itself, or with
the engine. The conditions below illustrate problems
with the machine. If correcting the potential issues list-
ed below does not alleviate your problem, refer to the
Perkins engine manual specific to your engine for trou-
bleshooting procedures.
Problem:
check for:
Hard starting
1. Water in fuel.
2. Proper grade and quality fuel.
Problem:
check for:
Low power
1. Air filter clogged.
2. Dirty, clogged, or restricted fuel filter.
3. Adequate supply of fuel to engine (fuel lines).
4. Water in fuel.
5. Proper grade and quality fuel.
Problem:
check for:
No start
1. Low fuel.
2. Out of fuel. (ensure proper gauge/sending unit
function. Inspect tank for fuel)
3. Blocked or restricted fuel line. (try alternate/remote
fuel supply to pump.)
4. Water in fuel.
5. Proper grade and quality fuel.
18-3
Compact Track Loader
18. Troubleshooting