JLG G12-55A AccuPlace Service Manual - Manual (Page 76)

Transmission
6.10 G10-55A & G12-55A AccuPlace
6. Grinding or “clunking” noise
from transmission.
1. Oil level too low. 1. Fill oil to correct level. Refer to
Section 2.4, “Fluid and
Lubricant Capacities.”
2. Transmission filled with incorrect
oil.
2. Drain transmission and fill to
correct level with Mobilfluid 424 ®
(ISO Grade 46). Refer to
Section 2.4, “Fluid and
Lubricant Capacities.”
3. Incorrect clutch engagement. 3. Refer to Section 9.11.8,
“Transmission Solenoid Valves.”
4. Internal damage. 4. Repair or replace parts as
needed.
5. Broken diaphragm (torque
convertor).
5. Replace diaphragm (torque
convertor). Refer to Section
7.8.1, “Torque Convertor
Diaphragm Removal.”
6. Loose diaphragm (torque
convertor) mounting capscrews.
6. Tighten capscrews.
Problem Cause Remedy