Troubleshoot Steering System - Yale A7S1 Service Manual

8000 YRM 2199

Troubleshoot Steering System

Problem
Steering Wheel Not
Turning
Hard Steering
Forklift Truck Swinging
walk
Abnormal Noise
Fluid Leak
Cause
Oil pump damaged or malfunctioning
Priority spool blocked or damaged
Rubber hose joint damaged or fluid line blocked
Steering relief valve pressure too low
Air present in oil circuit
Reset of steering gear out of operation, and
positioning leaf spring broken
Excessive internal leak of steering cylinder
Excessive oil flow
Warn or damaged steering components
Fluid tank level low
Suction pipe or oil filter blocked
Steering cylinder guide sleeve damaged or hoses or
joint damaged
Steering System
Solution
Replace pump
Clean or replace
Clean or replace
Adjust Steering relief
valve
Remove air
Replace leaf spring
Inspect sealing of piston
Adjust Steering relief
valve
Check physical
components
Add hydraulic fluid
Clean or replace suction
pipe or filter
Replace
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