Manitowoc Grove RT880E User Manual

UNDERCARRIAGE RT880E SERVICE MANUAL
8-8 Published 11-10-2014, Control # 524-00
Maintenance
Front Steering System
Troubleshooting
Symptom Probable Cause Solution
1. Hard to steer left and right. a. Hydraulic oil low. a. Refill hydraulic reservoir.
b. Clogged or loose hydraulic
lines or fittings.
b. Clean or tighten lines or
fittings.
c. Defective flow divider
valve(s).
c. Repair or replace valve(s).
d. Defective steering control
valve.
d. Repair or replace valve.
e. Defective hydraulic pump. e. Repair or replace pump.
2. Hard to steer either left or right. a. Clogged or loose hydraulic
lines or fittings.
a. Clean or tighten lines or
fittings.
b. Defective steer cylinder. b. Repair or replace cylinder.
3. Steering is erratic left and right. a. Hydraulic oil low. a. Refill hydraulic reservoir.
b. Clogged or loose hydraulic
lines or fittings.
b. Clean or tighten lines or
fittings.
c. Defective steering control
valve.
c. Repair or replace valve.
d. Defective hydraulic pump. d. Repair or replace pump.
4. Noisy hydraulic pump caused by
cavitation.
a. Hydraulic oil low. a. Refill hydraulic reservoir.
b. Suction line plugged or too
small.
b. Clean line and check for size.
5. Hydraulic pump shaft seal
leakage.
a. Worn shaft seal. a. Replace shaft seal.
NOTE: If replacing the shaft seal
does not stop leakage, the
pump should be disassem-
bled and checked for the fol-
lowing:
b. Broken diaphragm seal or
backup gasket.
b. Replace seal or gasket.
c. Bearing out of position. c. Replace bearing.
d. Excessive internal wear. d. Replace pump.

Manitowoc Grove RT880E Specifications

General

Brand	Manitowoc
Model	Grove RT880E
Category	Construction Equipment
Language	English