JLG Lull 1044C-54 II Series Service Manual page 342

Transmission
Transmission Troubleshooting (Continued)
Problem
6. Grinding or "clunking" noise
from transmission.
7. Oil leaking from transmission.
8-18
Cause
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. Oil leaking from vent (high oil
level).
2. Drain plug loose and/or o-rings
damaged or missing.
3. Hose fittings loose.
4. Oil leaking at valve bodies
(possible valve body gaskets
damaged or missing and/or
mounting capscrews not tight).
5. Housing capscrews loose.
6. Oil leaking at pump (possible
pump-to-housing o-rings
missing or damaged, and/or
pump mounting capscrews not
tight).
7. Oil leaking at converter bell
(possible converter leak and/or
input shaft seal damage).
8. Oil leaking at output shaft
(output shaft seal damaged).
9. Housing damaged.
Remedy
1. Fill oil to correct level. Refer to
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 9.14.7,
"Transmission Solenoid Valves."
4. Repair or replace parts as
needed.
5. Replace diaphragm (flex plate).
Refer to Section , "Transmission
Removal."
6. Tighten capscrews.
1. Remove drain plug and drain oil
as needed, until oil is at correct
level. Refer to the appropriate
owners/operators manual).
Replace o-rings as needed and
tighten plugs to 96 lb-ft (130 Nm).
2. Replace o-rings as needed and
tighten plug to 26 lb-ft (35 Nm).
3. Tighten fittings.
4. Replace gaskets and/or tighten
capscrews to 7 lb-ft (9,5 Nm).
5. Tighten capscrews to 34 lb-ft
(46 Nm).
6. Replace o-rings and/or tighten
capscrews to 85 lb-ft (115 Nm).
7. Replace converter and/or input
shaft seal.
8. Replace output shaft seal.
9. Replace housing as needed.
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