Manitowoc Grove GRT8100 Service Manual

8-9
GRT8100 SERVICE MANUAL UNDERCARRIAGE
8
Published 3/26/2018, Control # 596-05
GROVE
Rear Steering System
Troubleshooting
Table 8-2
Steer Cylinders
The steer cylinders are mounted on the axles, two cylinders
on each axle. The barrel end of each cylinder is attached to a
bracket on the axle housing and the rod end is attached to
the steering lug on the axle end. The cylinders are controlled
hydraulically by the steering control valve.
Removal
1. Tag and disconnect the hydraulic lines from the steer
cylinder. Cap or plug all openings.
2. Remove the capscrew, flatwasher, and lockwasher
securing each pin weld in the rod end and barrel end of
the cylinder.
NOTE: Steer cylinder weighs approximately 20 kg (44 lb).
3. Remove both pin welds and two thrust washers (rod end
only), and remove the cylinder from the axle.
Installation
1. Position the cylinder onto the attachment fittings on the
axle and install both pin welds. On the rod end, install a
thrust washer top an bottom of lug.
2. Secure each pin weld with the capscrew, flatwasher, and
lockwasher. Torque capscrews - refer to Fasteners and
Torque Values, page 1-15 for proper torque value.
3. Connect the hydraulic lines to the cylinder as tagged
during removal.
4. Operate the steering system and check the cylinder for
proper operation and any leakage.
Symptom Probable Cause Solution
1. Rear steering
inoperative.
a. Hydraulic oil low. a. Check system for leaks. Make
repairs as needed. Fill reservoir.
b. Clogged, broken, or loose
hydraulic lines or fittings.
b. Clean, tighten, or replace lines or
fittings.
c. Steer cylinder locked. c. Repair or replace cylinders.
d. Defective control valve. d. Repair or replace valve.
e. Defective steer cylinder(s). e. Repair or replace cylinder(s).
f. Lack of electrical signal f. Check electrical connections/wiring
2. Hard to steer left and
right.
a. Hydraulic oil low. a. Check system for leaks. Make
repairs as needed. Fill 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.
e. Clogged or loose hydraulic lines or
fittings.
e. Clean or tighten lines or
fittings.
f. Defective steer cylinder. f. Repair or replace cylinder.
g. Damaged relief. g. Replace relief valve.
3. Steering is erratic left
and right.
a. Hydraulic oil low. a. Check system for leaks. Make
repairs as needed. Fill 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.

Manitowoc Grove GRT8100 Specifications

General

Brand	Manitowoc
Model	Grove GRT8100
Category	Construction Equipment
Language	English