Subaru LEGACY 2006 Manual page 4020

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POWER ASSISTED SYSTEM (POWER STEERING)
C: INSPECTION
1. BASIC INSPECTION
Perform the following inspection procedures and replace faulty parts.
No. Parts
1 Oil pump (Exterior)
2 Pulley
3 Oil pump (Interior)
4 O-ring
5 Bracket
2. SERVICE LIMIT
Make a measurements as follows. If it exceeds the
service limit, replace with a new part.
CAUTION:
• When securing the oil pump on a vise, hold
the oil pump with the least possible force be-
tween two pieces of wood.
• Do not set the outside of flow control valve or
pulley on a vise; 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) Faulty or seized of vane pump
(2) Bend in the shaft or damage to
bearing
Cracking or deterioration
Crack
Service limit:
PS-50
Corrective action
Replace the oil pump with a new part.
Measure the radial play and axial play.
If any of these exceeds the service limit, replace the
oil pump with a new part.
Replace with a new part.
Measure the V groove deflection.
If it exceeds the service limit, replace the pulley with a
new part.
Check the rotating resistance of pulley.
If it exceeds the service limit, replace the oil pump with
new part.
If the a string is wrapped on the pulley and rotated,
and the oil pump emits a noise that is markedly differ-
ent in tone and loudness from a sound of a new oil
pump, replace the oil pump with a new part.
Replace with a new part.
Replace with a new part.
Play in the radial direction (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