Subaru 2009 IMPREZA, Руководство по обслуживанию

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PS-41
Pipe Assembly
POWER ASSISTED SYSTEM (POWER STEERING)
C: INSPECTION
Check all disassembled parts for wear, damage or other problems. Repair or replace the defective parts as
necessary.
CAUTION:
Although the surface layer materials of rubber hoses have excellent weathering resistance, heat re-
sistance 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 off hoses immediately if any of these come into contact with the hoses.
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.
Continuous discharge of the relief valve for 5 seconds or more will reduce the service lives of hoses,
oil pump, fluid, etc., due to over heating.
NOTE:
There are conditions in which a fluid leak is diagnosed, but is not actually leaking. This is because the fluid
spilt during the last maintenance was not completely wiped off. Be sure to wipe off spilt fluid thoroughly after
maintenance.
Part Maintenance parts Corrective action
Pipe
• O-ring fitting surface damage
• Nut damage
• Pipe damage
Replace with a new part.
Clamp • Loose clamps Replace with a new part.
Hose
• Flare surface damage
• Flare nut damage
• Outer surface cracks
• Outer surface wear
• Clip damage
• End coupling or adapter deformation
Replace with a new part.
Trouble Possible cause Corrective action
Pressure hose burst
Excessive holding time of relief status Instruct customers.
Malfunction of the relief valve Replace the oil pump.
Poor cold characteristic of fluid Replace fluid.
Disconnection of the return
hose
Improper connection Repair.
Loosening of the clip Retighten.
Poor cold characteristic of fluid Replace fluid.
Fluid slightly leaking out of
hose
Wrong layout, tensioned Replace the 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 for return hose clip Replace.
Power steering fluid, engine oil, electrolyte adhere
on the hose surface Replace.
Be careful during service work.
Too many uses in extremely cold weather
Replace.
Instruct customers.