Subaru 2001 FORESTER Service Manual page 91

Power Assisted System (Power Steering)
C: INSPECTION
Check all disassembled parts for wear, damage or
other abnormalities. Repair or replace faulty parts
as required.
Part name Inspection
¼ O-ring fitting surface for
damage
Pipe
¼ Nut for damage
¼ Pipe for damage
Clamp B
¼ Clamps for weak clamping
Clamp C
force
Clamp E
¼ Flared surface for damage
¼ Flare nut for damage
¼ Outer surface for cracks
¼ Outer surface for wear
Hose
¼ Clip for damage
¼ End coupling or adapter for
degradation
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. It is very important to keep the hoses free from before mentioned fluids
and to 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
accordingly, it is necessary to perform careful inspection frequently when the vehicle is used in hot
weather areas, cold weather area and/or 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
hoses, the oil pump, the fluid, etc. due to over heat.
So, avoid to keep this kind of condition when servicing as well as driving.
Trouble
Pressure hose burst
Forced out return hose
Fluid bleeding out of hose
slightly
Crack on hose
PIPE ASSEMBLY
S601277A10
Remedy
Replace with
new one.
Replace with
new one.
Replace with
new one.
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 for return hose clip
Power steering fluid, brake fluid, engine oil, elec-
trolyte adhere on the hose surface
Too many times use in extremely cold weather
Instruct customers.
Replace oil pump.
Replace fluid.
Correct.
Retighten.
Replace fluid.
Replace hose.
Replace defective parts.
Replace defective parts.
Replace.
Instruct customer.
Replace.
Replace.
Pay attention on service work.
Replace.
Instruct customers.
PS-90
Corrective action