Subaru Legacy (2005 year). Manual - part 850

 

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Subaru Legacy (2005 year). Manual - part 850

 

 

PS-71

POWER ASSISTED SYSTEM (POWER STEERING)

Pipe Assembly [LHD Model]

C: INSPECTION

Check all disassembled parts for wear, damage or other abnormalities. Repair or replace the 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 the 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 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.
Pay attention on service work.

Too many times use in extremely cold weather

Replace.
Instruct customers.

PS-72

POWER ASSISTED SYSTEM (POWER STEERING)

Pipe Assembly [LHD Model]

NOTE:
It is likely that although one judges fluid leakage, there is actually no leakage. This is because the fluid spilt
during the last maintenance was not completely wiped off. Be sure to wipe off spilt fluid thoroughly after main-
tenance.

(A)

3.0 L model

(B)

Except for 3.0 L model

Fluid leaking area

Possible cause

Corrective action

Leakage from connecting portions of 
pipes and hoses, numbered with (1) 
through (8) in the figure

Insufficient tightening of flare nut, adhesion of 
dirt, damage to flare or flare nut or eye bolt

Loosen and retighten. Replace if ineffec-
tive.

Poor insertion of hose or clamping

Retighten or replace the clamp.

Damaged O-ring or gasket

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

Leakage from hose (9) through (13) in 
the 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 (14) and (15) in 
the figure

Damaged O-ring

Replace the oil pump.

Damaged gasket

Replace the oil pump.

Leakage from oil tank (16) and (17) in 
the figure

Crack in oil tank

Replace the oil tank.

Leakage from filler neck (18)

Damaged cap packing

Replace the cap.

Crack in root of filler neck

Replace the oil tank.

High fluid level

Adjust the fluid level.

Leakage from surrounding of power 
cylinder of gearbox (19) in the figure

Damaged oil seal

Replace the oil seal.

Leakage from control valve of gear-
box (20) and (21) in the figure

Damaged packing or oil seal

Replace the problem parts.

Damage in control valve

Replace the control valve.

(22) Leakage from the joints between 
cooler pipe and hose.

Insufficient tightening of connecting portion.

Loosen and retighten.

PS-00541

(10)

(17)

(1)

(13)

(19)

(4)

(2)

(9)

(8)

(7)

(12)

(15)

(14)

(11)

(16)

(18)

(5)

(6)

(20)

(3)

(21)

(22)

(A)

(B)

PS-73

POWER ASSISTED SYSTEM (POWER STEERING)

Pipe Assembly [RHD Model]

8. Pipe Assembly [RHD Model]

A: REMOVAL

1) Disconnect the ground cable from battery.
2) Lift-up the vehicle, and then remove the front
crossmember support plate and jack-up plate.
• Large type

• Small type

• Small type (6MT model)

3) Remove one pipe joint at the center of gearbox,
and connect the vinyl hose to the pipe and the joint.
Discharge the fluid by turning steering wheel fully
clockwise and counterclockwise. Discharge the flu-
id similarly from other pipes.

4) Remove the clamp E from the return hose and
pressure hose.

(1) Front crossmember support plate

(1) Front crossmember support plate

(2) Jack-up plate

(1) Front crossmember support plate

(2) Jack-up plate

PS-00445

(1)

FS-00105

(2)

(1)

(1)

FS-00186

(2)

(1)

(1)

(1) Pipe A

(2) Pipe B

(1) Return hose

(2) Pressure hose

(3) Clamp E

PS-00446

(1)

(2)

PS-00542

(1)

(2)

(3)

PS-74

POWER ASSISTED SYSTEM (POWER STEERING)

Pipe Assembly [RHD Model]

5) Disconnect the return hose and pressure hose
from gearbox.

6) Remove the air intake duct. <Ref. to
IN(H4DOTC)-9, REMOVAL, Air Intake Duct.>
<Ref. to IN(H4SO 2.0)-8, REMOVAL, Air Intake
Duct.>
7) Disconnect the suction hose and pressure hose
from oil pump.
• Non-turbo model

• Turbo model

8) Disconnect the suction hose and return hose
from reservoir tank. Remove the oil cooler from oil
cooler bracket.
• H4 turbo model

• H4 non-turbo model

(1) Return hose

(2) Pressure hose

(1) Suction hose

(2) Pressure hose

PS-00543

(1)

(2)

PS-00688

(1)

(2)

(1) Suction hose

(2) Pressure hose

(1) Reservoir tank

(2) Suction hose

(3) Return hose

(4) Oil cooler

(5) Oil cooler bracket

(1) Reservoir tank

(2) Suction hose

(3) Return hose

(2)

PS-00459

(1)

PS-00482

(1)

(3)

(2)

(5)

(4)

PS-00697

(1)

(2)

(3)

 

 

 

 

 

 

 

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