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6-4 Troubles Shooting
Characteristics of faults
Cause
Remedy
Hard to make steering
Oil temperature too low
Increase the oil temperature , then
start working
Load sensing oil way blocked
Clean it
Pressure of steering pump low
Adjust overflow valve block pressure
according to the regulations
Partial bolts for metering motor of full
hydraulic steering gear tightened too
tightly
Loosen the bolts
Vehicle steering not stable
Flow amplifying valve action is not
sensitive
Repair or replace the flow amplifying
valve
Both leftward and rightward
steering slowly
Regulation valve leaking
Repair or replace priority valve
Steering pump flow inadequate
Repair or replace steering pump
Steering normally when
steering resistance is small;
Steering slowly when steering
resistance is large
Steering overflow valve seat leaking
severely
Repair vale seat or replace seal ring
Steering cylinder leaking severely
Repair or replace steering cylinder
seal ring
Vehicle not steering while
steering wheel is rotated
Steering gear fault
Repair or replace steering gear
Steering overflow valve fault
Repair steering overflow valve
Steering column fault
Repair steering column
Steering wheel auto rotates
while driver nor operating
Full hydraulic steering gear valve
housing blocked
Remove impurities in valve
Full hydraulic steering gear spring
plate broken
Replace spring plate
Steering pump noisy and
steering cylinder acts slowly
Air in steering oil way
Start vehicle, make several times of
leftward/rightward steering
Steering pump worn, and flow
inadequate
Replace steering pump
Oil viscosity inadequate
Change oil as per correct brands
Hydraulic oil inadequate
Fill enough hydraulic oil
Internal leaking in steering cylinder
Repair cylinder or replace seal
STEERING HYDRAULIC SYSTEM
Summary of Contents for HL630VL
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Page 61: ...2 10 Operation Controls Schematic Fig 11 ...
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Page 126: ...Inspection Maintenance and Adjustment 4 7 LUBRICATION OIL AND MAINTENANCE CHART Figure 4 ...
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