Manitowoc Grove 5540F Service Manual

GROVE Published 10-21-2010, Control# 198-04 10-15
5540F/YB5515 SERVICE MANUAL STEERING SYSTEM
10
Symptom Probable Cause Action
Slow steering, hard steering, or loss of
power assist.
1. Worn or malfunctioning pump.
2. Priority valve not operating
correctly.
3. Malfunctioning relief valve.
4. Overloaded steering axle.
5. Air in hydraulic system.
6. Malfunctioning steering orbitrol.
7. Malfunctioning steering mode
valve.
8. Mechanical failure.
1. Repair or replace the pump.
2. Check for stick spool. Repair or
replace. Check load sense line for
leaks or poor connection.
3. Replace the priority valve.
4. Reduce the load.
5. Bleed system - bleed the load
sense line.
6. Remove and inspect.
7. Check if spools are sticking.
Repair or replace.
Check if solenoids are operating.
Replace if needed.
8. Check for damaged axle
components, such as cylinders, tie
rods, linkages, etc.
Steering wheel turns on its own. 1. Dirt in steering orbitrol (causing
sleeves to stick open).
2. Steering actuator centering
springs damaged or broken.
3. Steering actuator - position of rotor
to shaft slot incorrect.
1. Clean and inspect unit.
2. Check orbitrol. Repair or replace.
3. See page 10-17. Correct if
required.
Machine will not turn when the steering
wheel is turned.
1. Insufficient oil level.
2. Leaks in relevant hoses or
component connections.
3. Air in the hydraulic system.
4. Low pump flow.
5. Malfunctioning relief valve.
6. Worn or damaged parts in the
steering orbitrol.
7. Priority valve not operating
correctly.
8. Steering mode valve not operating
correctly.
9. Mechanical failure.
10. Steering column splined shaft not
fully engaged in orbitrol.
1. Check for leaks and fill tank.
2. Check hoses and connections for
leaks.
3. Bleed system -bleed the load
sense line.
4. Check pump flow. If required,
repair or replace the pump.
5. Replace priority valve.
6. Remove, inspect and repair.
7. Check if the
priority
valve is
sticking and repair if necessary.
Check the load sense line for
leaks or loose connections.
8. Check for sticking spools. Clean or
replace.
Check for faulty solenoids.
Replace if necessary.
9. Check for damaged axle
components, such as cylinders, tie
rods, linkages, etc.
10. Check shaft engagement.
Reference Only

Manitowoc Grove 5540F Specifications

General

Brand	Manitowoc
Model	Grove 5540F
Category	Construction Equipment
Language	English