Subaru Legacy 2004 Service Manual page 3339

C: INSPECTION
Check all disassembled parts for wear, damage or other abnormalities. Repair or replace defective parts as
necessary.
Parts
Pipe
Clamp
Hose
CAUTION:
Although surface layer materials of rubber hoses have excellent weathering resistance, heat resis-
tance and resistance for low temperature brittleness, they are likely to be damaged chemically by
brake fluid, battery electrolyte, engine oil and automatic transmission fluid and their service lives are
to be very shortened. Wipe out immediately when the hoses are adhered with the fluids.
Since resistances for heat or low temperature brittleness are gradually declining according to time
accumulation of hot or cold conditions for the hoses and their service lives are shortening accord-
ingly, it is necessary to perform careful inspection frequently when the vehicle is used in hot weather
areas, cold weather areas and a driving condition in which many steering operations are required in
short time.
Particularly continuous work of relief valve over 5 seconds causes to reduce service lives of the hos-
es, the oil pump, the fluid, etc. due to over heat.
Trouble
Pressure hose burst
Forced out return hose
Fluid bleeding out of hose
slightly
Crack on hose
Pipe Assembly [LHD Model]
Maintenance Parts
• O-ring fitting surface for damage
• Nut for damage
• Pipe for damage
• Clamps for weak clamping force
• Flare surface for damage
• Flare nut for damage
• Outer surface for cracks
• Outer surface for wear
• Clip for damage
• End coupling or adapter for deformation
Possible cause
Excessive holding time of relief status
Malfunction of relief valve
Poor cold characteristic of fluid
Poor connection
Poor holding of clip
Poor cold characteristic of fluid
Wrong layout, tensioned
Excessive play of engine due to deterioration of
engine mounting rubber
Improper stop position of pitching stopper
Excessive holding time of relief status
Excessive tightening torque of return hose clip
Power steering fluid, engine oil, electrolyte adhere
on the hose surface
Too many times use in extremely cold weather
PS-69
POWER ASSISTED SYSTEM (POWER STEERING)
Replace with a new one.
Replace with a new one.
Replace with a new one.
Instruct customers.
Replace oil pump.
Replace fluid.
Repair.
Retighten.
Replace fluid.
Replace hose.
Replace the parts if defective.
Replace the parts if defective.
Replace.
Instruct customers.
Replace.
Replace.
Pay attention on service work.
Replace.
Instruct customers.
Corrective action
Corrective action