Subaru Legacy 2004 Service Manual page 3350

POWER ASSISTED SYSTEM (POWER STEERING)
C: INSPECTION
1. BASIC INSPECTION
Perform the following inspection procedures and replace defective parts.
No. Parts
1 Oil pump (Exterior)
2 Pulley
3 Oil pump (Interior)
4 O-ring
5 Bracket
2. SERVICE LIMIT
Make a measurement as follows. If it exceeds the
service limit, replace with a new one.
CAUTION:
• When securing the oil pump on a vice, hold
the oil pump with the least possible force be-
tween two wood pieces.
• Do not set outside of flow control valve or
pulley on a vice; otherwise outside or pulley
might be deformed. Select properly sized wood
pieces.
1) Play of the pulley shaft
Condition:
P: When applying the force of 9.8 N (1.0 kgf,
2.2 lb)
Oil Pump
INSPECTION
(1) Crack, damage or oil leakage
(2) Play of pulley shaft
(1) Damage
(2) Bend
(1) Defect or burning of vane pump
(2) Bend in the shaft or damage to
bearing
Crack or deterioration
Crack
PS-80
Corrective action
Replace the oil pump with a new one.
Measure the radial play and axial play.
If any of these exceeds the service limit, replace the
oil pump with a new one.
Replace with a new one.
Measure the V ditch deflection.
If it exceeds the service limit, replace the pulley with a
new one.
Check the resistance to the rotation of pulley.
If it exceeds the service limit, replace the oil pump with
a new one.
Oil pump emits a noise that is markedly different in
tone and loudness from a sound of a new oil pump
when turning its pulley which is put around with a
string, replace the oil pump with a new one.
Replace with a new one.
Replace with a new one.
Service limit:
Radial play (Direction
0.4 mm (0.016 in) or less
P
(1) Dial gauge
Axial play (Direction
0.9 mm (0.035 in) or less
(1)
P
(1) Dial gauge
)
(1)
PS-00145
)
PS-00146