JLG G12-55A AccuPlace Service Manual - Manual (Page 74)

Transmission
6.8 G10-55A & G12-55A AccuPlace
2. Low or no pump flow or
pressure.
1. Low oil level. 1. Fill transmission to correct level
with Mobilfluid 424 ®
(ISO Grade 46). Refer to
Section 2.4, “Fluid and
Lubricant Capacities.”
2. Transmission filled with incorrect
oil, or oil contaminated.
2. Drain transmission and fill to
correct level with Mobilfluid 424 ®
(ISO Grade 46). Refer to
Section 2.4, “Fluid and
Lubricant Capacities.”
3. Pump suction pipe screen
clogged.
3. Clean, repair and/or replace
suction pipe.
4. Central shaft damaged. 4. Replace central shaft.
5. Pump worn or damaged. 5. Repair or replace pump
assembly.
6. Electronic control function not
operating properly.
6. Check for DTC. Refer to Section
9.15.8, “Diagnostic Trouble
Code (DTC) Table.”
Refer to Section 9.15.2, “Debug
Functionality.”
3. Low clutch pressure. 1. Incorrect oil level. 1. Fill transmission to correct level
with Mobilfluid 424 ®
(ISO Grade 46). Refer to
Section 2.4, “Fluid and
Lubricant Capacities.”
2. Main pressure valve stuck open. 2. Clean the valve spool and
housing.
3. Broken or worn coupling shaft or
piston o-rings.
3. Replace coupling and/or o-rings.
4. Pressure reducing valve stuck
open.
4. Clean the valve spool and
housing.
Problem Cause Remedy