Lull 944E-42 Service Manual - Manual (Page 193)

6.17 Model 644E-42/944E-42 Rev. 6/04
Transmission: ZF 4WG-92/98 TSC & Transfer Case: ZF TB92-I4
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 7.6.2,
“Thermostat Replacement.”)
6. Grinding or “clunking” noise
from transmission.
1. Oil level too low.
2. Transmission filled with incorrect
oil.
3. Incorrect clutch engagement.
4. Internal damage.
5. Broken diaphragm (flex plate).
6. Loose diaphragm (flex plate)
mounting capscrews.
1. Fill oil to correct level. (Refer to
the appropriate Owners/
Operators Manual.)
2. Drain transmission and fill to
correct level with Universal
Tractor Fluid. (Refer to the
appropriate Owners/Operators
Manual.)
3. Refer to Section 9.14.9,
“Transmission Solenoid Valves.”
4. Repair or replace parts as
needed.
5. Replace diaphragm (flex plate).
Section 6.7.1, “Transmission
Removal.”
6. Tighten capscrews.
6.8.1 Transmission Troubleshooting (Continued)
Problem Cause Remedy