Subaru Legacy 2003 Service Manual page 3407

POWER ASSISTED SYSTEM (POWER STEERING)
E: INSPECTION
1. BASIC INSPECTION
Perform the following inspection procedures and repair or replace defective parts.
Part name
1. Front casing
2. Rear cover
3. Shaft
4. Pressure plate
5. Cam ring
6. Vane
7. Rotor
8. Connector
9. Spring
10. Bolts and nuts
• In accordance with the following table, check all removed parts for wear and damage, and make repair or
replacement if necessary.
No. Parts
1 Oil pump (Exterior)
2 Pulley
3 Oil pump (Interior)
4 O-ring
5 Bracket
Description
1) Damage on body surfaces
2) Excessive wear on hole, into which spool
valve is inserted.
3) Wear and damage on cartridge assembly
mounting surface
4) Wear and damage on surfaces in contact with
shaft and oil seal
1) Damage on body surfaces
2) Wear and damage on sliding surfaces
1) Shaft bend
2) Wear and damage on surfaces in contact with
bushing and oil seal
3) Wear and damage on rotor mounting surfaces
4) Bearing damage
Wear and damage on sliding surfaces
Ridge wear on sliding surfaces
Excessive wear on nose radius and side sur-
faces
1) Wear and damage on sliding surfaces
2) Ridge wear on vane sliding grooves (If light
leaks with vane in slit against light source)
3) Damage resulting from snap ring removal
Damage on threads
Damage
Damage on threads
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
OIL PUMP
Replace with a new one together with spool
valve as selective fit is made.
Replace with a new one.
Replace with a new one.
Replace with a new one.
If damage is serious, replace with a new car-
tridge assembly.
Correct with oil stone. If damage is serious,
replace with a new cartridge assembly.
Replace with a new one.
Replace with a new one.
Replace with a new one.
Replace oil pump with a new one.
Measure radial play and axial play.
If any of these exceeds the service limit, replace oil
pump with a new one.
Replace it with a new one.
Measure V ditch deflection.
If it exceeds the service limit, replace pulley with a
new one.
Check resistance to rotation of pulley.
If it is past the service limit, replace 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 with a string put around its pulley,
replace oil pump with a new one.
Replace it with a new one.
Replace it with a new one.
PS-86
Remedy
Corrective action