JLG 3507 Service Manual page 62

Transmission:
Problem
2. Low or no pump flow or
pressure.
3. Low clutch pressure.
4. Lack of power.
6.8
Cause
1. Low oil level.
2. Transmission filled with incorrect
oil, or oil contaminated.
3. Pump suction pipe screen
clogged.
4. Central shaft damaged.
5. Pump worn or damaged.
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. 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.
Remedy
1. Fill transmission to correct level
with Mobilfluid 424
Grade 46. (Refer to Section 2.4,
"Fluids, Lubricants and
Capacities.")
2. Drain transmission and fill to
correct level with Mobilfluid 424
ISO Grade 46. (Refer to Section
2.4, "Fluids, Lubricants and
Capacities.")
3. Clean, repair and/or replace
suction pipe.
4. Replace central shaft.
5. Repair or replace pump
assembly.
1. Fill transmission to correct level
with Mobilfluid 424
Grade 46. Refer toSection 2.4,
"Fluids, Lubricants and
Capacities."
2. Clean the valve spool and
housing.
3. Replace coupling and/or o-rings.
4. Clean the valve spool and
housing.
1. Refer to Section 8.5, "Hydraulic
Schematics."
2. Adjust the engine rpm to
specifications. Refer to Dana-
Spicer Service Manual.
3. Refer to Section 6.6.1,
"Transmission Troubleshooting,"
Problem 2. "Low or no pump
flow or pressure."
4. Replace clutch discs.
5. Refer to Section 6.6.1,
"Transmission Troubleshooting,"
Problem 5. "Transmission
overheating (oil above 120° C
(248° F))."
3507, 3508, 3509, 3512, 3513, 4007, 4008, 4009, 4012, 4013
®
ISO
®
®
ISO
Courtesy of Crane.Market