Subaru Legacy III (2000-2003 year). Service 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
A
B
( 1 )
( 2 )
( 3 )
( 4 )
( 5 )
( 6 )
( 7 )
( 8 )
( 8 )
( 9 )
( 9 )
( 9 )
(10)
(10)
(11)
(11)
(12)
(12)
(13)
(13)
(13)
(14)
(15)
(15)
(16)
(16)
(17)
(17)
(18)
(18)
(19)
(19)
(20)
(21)
(22)
A
A
A
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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