Manitowoc Grove RT540E Service Maintenance Manual page 261

RT540E SERVICE MANUAL
Maintenance
Front Steering System
Troubleshooting
Table 8-1
Symptom
1. Hard to steer left and right.
2. Hard to steer either left or right.
3. Steering is erratic left and right.
4. Noisy hydraulic pump caused by
cavitation.
5. Hydraulic pump shaft seal
leakage.
GROVE
Probable Cause
a. Hydraulic oil low.
b. Clogged or loose hydraulic
lines or fittings.
c. Defective flow
valve(s).
d. Defective steering
valve.
e. Defective hydraulic pump.
a. Clogged or loose hydraulic
lines or fittings.
b. Defective steer cylinder.
a. Hydraulic oil low.
b. Clogged or loose hydraulic
lines or fittings.
c. Defective steering
valve.
d. Defective hydraulic pump.
a. Hydraulic oil low.
b. Suction line plugged or too
small.
a. Worn shaft seal.
NOTE: If replacing the shaft seal
does not stop leakage, the
p u m p s h o u l d
disassembled and checked
for the following:
b. Broken diaphragm seal or
backup gasket.
c. Bearing out of position.
d. Excessive internal wear.
Published 4-20-2015, Control # 502-01
UNDERCARRIAGE
Solution
a. Refill hydraulic
R e f e r t o
LUBRICATION
b. Clean or tighten lines or
f i t t i n g s . ( R e f e r t o y o u r
Manitowoc Crane Care Parts
Manual)
divider c. Repair or replace valve(s).
control d. Repair or replace valve.
e. Repair or replace pump.
a. Clean or tighten lines or
fittings. Refer to Section 9 -
LUBRICATION
b. Repair or replace cylinder.
a. Refill hydraulic
R e f e r t o
LUBRICATION.
b. Clean or tighten lines or
fittings.
control c. Repair or replace valve.
d. Repair or replace pump.
a. Refill hydraulic
R e f e r t o
LUBRICATION
b. Clean line and check for size.
a. Replace shaft seal.
b e
b. Replace seal or gasket.
c. Replace bearing.
d. Replace pump.
reservoir.
S e c t i o n 9 -
reservoir.
S e c t i o n 9 -
reservoir.
S e c t i o n 9 -
8
8-11