Subaru 2004 LEGACY, Руководство по обслуживанию

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PS-69
POWER ASSISTED SYSTEM (POWER STEERING)
Pipe Assembly [LHD Model]
C: INSPECTION
Check all disassembled parts for wear, damage or other abnormalities. Repair or replace defective parts as
necessary.
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.
Parts Maintenance Parts Corrective action
Pipe
• O-ring fitting surface for damage
• Nut for damage
• Pipe for damage
Replace with a new one.
Clamp • Clamps for weak clamping force Replace with a new one.
Hose
• 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
Replace with a new one.
Trouble Possible cause Corrective action
Pressure hose burst
Excessive holding time of relief status Instruct customers.
Malfunction of relief valve Replace oil pump.
Poor cold characteristic of fluid Replace fluid.
Forced out return hose
Poor connection Repair.
Poor holding of clip Retighten.
Poor cold characteristic of fluid Replace fluid.
Fluid bleeding out of hose
slightly
Wrong layout, tensioned Replace hose.
Excessive play of engine due to deterioration of
engine mounting rubber
Replace the parts if defective.
Improper stop position of pitching stopper Replace the parts if defective.
Crack on hose
Excessive holding time of relief status
Replace.
Instruct customers.
Excessive tightening torque of return hose clip Replace.
Power steering fluid, engine oil, electrolyte adhere
on the hose surface Replace.
Pay attention on service work.
Too many times use in extremely cold weather
Replace.
Instruct customers.