SkyTrak 8042 Service Manual - Manual (Page 321)

Transmission: ZF 4 WG-98 TC
6.16 Model 8042, 10042, 10054 Legacy Rev. 10/03
3. Low clutch pressure. 1. Incorrect oil level.
2. Main pressure valve stuck open.
3. Broken or worn coupling shaft or
piston o-rings.
4. Pressure reducing valve stuck
open.
1. Fill transmission to correct level
with Universal Tractor Fluid.
Refer to the appropriate owners/
operators manual.
2. Clean the valve spool and
housing.
3. Replace coupling and/or o-rings.
4. Clean the valve spool and
housing.
4. Lack of power. 1. Park or service brake dragging.
2. Low engine rpm causes
converter stall.
3. Pump output pressure is low.
4. Clutch discs worn or damaged.
5. Transmission overheating.
1. Refer to Section 8.8, “Hydraulic
Circuits and Troubleshooting.”
2. Adjust the engine rpm to
specifications. Refer to
Cummins Service Manual.
3. Refer to Section 6.9.1,
“Transmission Troubleshooting,”
Problem 2. “Low or no pump
flow or pressure.”
4. Replace clutch discs.
5. Refer to Section 6.9.1,
“Transmission Troubleshooting,”
Problem 5. “Transmission
overheating (oil above 248° F
[120° C]).”
5. Transmission overheating
(oil above 248° F [120° C]).
1. Low oil level.
2. Clogged radiator.
3. Transmission filled with incorrect
oil, or oil contaminated.
4. Excessive “roading.”
5. Restriction in oil cooler hoses.
6. Pump worn or damaged.
7. Engine thermostat stuck.
1. Fill transmission to correct level
with Universal Tractor Fluid.
Refer to the appropriate owners/
operators manual.
2. Remove debris from the
radiator.
3. Drain transmission and fill to
correct level with Universal
Tractor Fluid. Refer to the
appropriate owners/operators
manual.
4. Stop and idle the engine.
5. Replace cooler hoses.
6. Repair or replace pump
assembly.
7. Replace engine thermostat.
Refer to Section 7B.6.2, b.
“Thermostat Installation.”
6.9.1 Transmission Troubleshooting (Continued)
Problem Cause Remedy