Subaru Legacy III (2000-2003 year). Manual - part 847

PS-76

POWER ASSISTED SYSTEM (POWER STEERING)

PIPE ASSEMBLY

C: INSPECTION

Check all disassembled parts for wear, damage or
other abnormalities. Repair or replace faulty parts
as required.

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 accord-
ingly, 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 hos-
es, the oil pump, the fluid, etc. due to over heat.
So, avoid to keep this kind of condition when servicing as well as driving.

Part name

Inspection

Remedy

Pipe

• O-ring fitting surface for
damage
• Nut for damage
• Pipe for damage

Replace with
new one.

Clamp

• Clamps for weak clamping
force

Replace with
new one.

Hose

• Flared surface for damage
• Flare nut for damage
• Outer surface for cracks
• Outer surface for wear
• Clip for damage
• End coupling or adapter for
degradation

Replace with
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

Correct.

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 defective parts.

Improper stop position of pitching stopper

Replace defective parts.

Crack on hose

Excessive holding time of relief status

Replace.
Instruct customer.

Excessive tightening torque for return hose clip

Replace.

Power steering fluid, brake fluid, engine oil, electro-
lyte adhere on the hose surface

Replace.
Pay attention on service work.

Too many times use in extremely cold weather

Replace.
Instruct customers.

PS-77

POWER ASSISTED SYSTEM (POWER STEERING)

PIPE ASSEMBLY

CAUTION:
It is likely that although one judges fluid leakage, there is actually no leakage. This is because the flu-
id spilt during the last maintenance was not completely wiped off. Be sure to wipe off spilt fluid thor-
oughly after maintenance.

(A) Except 3.0 L and Turbo model

(B) 3.0 L and Turbo model

PS-00224

( 1 )

( 2 )

( 3 )

( 4 )

( 5 )

( 6 )

( 7 )

( 8 )

( 9 )

(10)

(11)

(12)

(13)

(14)

(15)

(16)

(17)

(18)

(19)

(20)

(21)

(22)

PS-78

POWER ASSISTED SYSTEM (POWER STEERING)

PIPE ASSEMBLY

NOTE:
Fluid level is specified at optimum position (range) for ordinary use. Accordingly, if the vehicle is used often
under hard conditions such as on very rough roads or in mountainous areas, fluid may bleed out from cap air
vent hole. This is not a problem. If a customer complains strongly and is not likely to be satisfied with the leak-
age, lower the fluid level to the extent that fluid will not bleed out under the conditions described, and have
the customer check the fluid level and its quality more frequency than usual.

Fluid leaking area

Possible cause

Corrective action

Leakage from connecting portions of
pipes and hoses, numbered with (1)
through (11) in figure

Insufficient tightening of flare nut, catching
dirt or the like, damage to flare or flare nut or
eye bolt

Loosen and retighten, if ineffective,
replace.

Poor insertion of hose, poor clamping

Retighten or replace clamp.

Damaged O-ring or gasket

Replace O-ring or gasket pipe or hose
with new one, if ineffective, replace gear-
box also.

Leakage from hose (12), (13) and
(14) in figure

Crack or damage in hose

Replace with a new one.

Crack or damage in hose hardware

Replace with a new one.

Leakage from surrounding of cast iron
portion of oil pump (15) and (16) in
figure

Damaged O-ring

Replace oil pump.

Damaged gasket

Replace oil pump.

Leakage from oil tank (17) and (18) in
figure

Crack in oil tank

Replace oil tank.

Leakage from filler neck (19)

Damaged cap packing

Replace cap.

Crack in root of filler neck

Replace oil tank.

High fluid level *1

Adjust fluid level.

Leakage from surrounding of power
cylinder of gearbox (20) in figure

Damaged oil seal

Replace oil seal.

Leakage from control valve of gear-
box (21) and (22) in figure

Damaged packing or oil seal

Replace problem parts.

Damage in control valve

Replace control valve.

PS-79

POWER ASSISTED SYSTEM (POWER STEERING)

OIL PUMP

8. Oil Pump

A: REMOVAL

1. EXCEPT 3.0 L AND TURBO MODEL

1) Remove ground cable from battery.
2) Remove pulley belt cover bracket.
3) Loosen lock bolt and slider bolt and remove
power steering pump drive V-belt.

4) Disconnect connector from power steering
pump switch.
5) Disconnect pipe C and suction hose from oil
pump.

CAUTION:
• Do not allow fluid from the hose end to come
into contact with pulley belt.
• To prevent foreign matter from entering the
hose and pipe, cover the open ends of them
with a clean cloth.

6) Remove bolts which install power steering pump
bracket.

7) Place oil pump bracket in a vise, remove two
bolts from the front side of oil pump.

CAUTION:
Do not place oil pump bracket directly in the
vise; use soft pads and hold oil pump lightly to
protect the pump.

8) Remove socket from oil pump.

9) Remove bolt from the rear side of oil pump.

(1) Suction hose

(2) Pipe C

PS-00125

PS-00225

( 1 )

( 2 )

PS-00127

PS-00226

PS-00227

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