cam shaft cover SUBARU LEGACY 1995 Service User Guide

3. Oil Pump
B3M0354A

1Retainer


2Return spring


3Pin


4Friction ring


5O-ring


6Cam ring


7Vane ring


8Vane


9Rotor


10Oil pump cover


11Thrust washer


12Seal ring (R)


13Seal ring (H)


14Thrust needle bearing


15Thrust washer

16Air breather hose


17Drive pinion shaft


18Roller bearing


19Shim


20Test plug


21Oil pump housing


22Pin


23Side seal


24Control piston


25Plane seal


26Gasket


27O-ring


28Oil seal


29Oil seal retainer


30Drive pinion collar

31Lock washer


32Lock nut


33O-ring


34O-ring


35Nipple


36Stud bolt
Tightening torque: N⋅m (kg-m, ft-lb)
T1: 7±1 (0.7±0.1, 5.1±0.7)
T2: 13±1 (1.3±0.1, 9.4±0.7)
T3: 18±5 (1.8±0.5, 13.0±3.6)
T4: 25±2 (2.5±0.2, 18.1±1.4)
T5: 39±3 (4.0±0.3, 28.9±2.2)
T6: 41±3 (4.2±0.3, 30.4±2.2)
T7: 113±5 (11.5±0.5, 83.2±3.6)
12
3-2COMPONENT PARTS
3. Oil Pump

G3M0446
2) Remove the oil pump cover.
NOTE:
Lightly tap the end of the stator shaft to remove the cover.
G3M0447
3) Remove the retainer and return spring. Then remove
the rotor, two vane rings and nine vanes.
G3M0448
4) Remove the cam ring and control piston.
Also remove the O-ring, friction ring, two side seals, and
plain seal.
G3M0449
5) Remove two seal rings (R) and two seal rings (H).
B: INSPECTION
1) Make sure that each component is free of harmful
gouges, cuts, and dust.
90
3-2SERVICE PROCEDURE
7. Oil Pump Assembly

G3M0454
2) Install the vane ring, rotor and vanes into the housing
in this sequence.
G3M0455
3) Install the return spring and retainer between the hous-
ing and cam ring.
G3M0456
4) Install the control piston to the oil pump housing.
NOTE:
Fit the seal in the piston groove, with the red seals facing
the top side. (Two side seals and one plain seal are
attached.)
5) Set the rotor at the center of the housing bore. Apply
ATF abundantly to each rotary portion.
G3M0446
6) Install the oil pump cover.
Tightening torque:
25±2 N⋅m (2.5±0.2 kg-m, 18.1±1.4 ft-lb)
NOTE:
Align both pivots with the pivot holes of the cover, and
install the cover being careful not to apply undue force to
the pivots.
After assembling, turn the oil pump shaft to check for
smooth rotation of the rotor.
G3M0449
NOTE:
Install the oil seal retainer and seal rings (R) and (H)
after adjusting the drive pinion backlash and tooth contact.
92
3-2SERVICE PROCEDURE
7. Oil Pump Assembly

3. Power Steering Oil Pump
B4M0123A
1Pulley

2Snap ring

3Bearing

4Oil seal

5Shaft

6Connector

7O-ring

8Spool valve
9Spring

10Front casing

11Rear cover

12Gasket

13Knock pin

14Cam ring

15Vane

16Rotor
17Side plate
Tightening torque: N⋅m (kg-m, ft-lb)
T1: 16±2 (1.6±0.2, 11.6±1.4)
T2: 61±7 (6.2±0.7, 44.8±5.1)
T3: 74±5 (7.5±0.5, 54.2±3.6)
9
4-3COMPONENT PARTS
3. Power Steering Oil Pump

C: DISASSEMBLY
B4M0142A
1Pulley

2Snap ring

3Bearing

4Oil seal

5Shaft

6Connector

7O-ring

8Spool valve
9Spring

10Front casing

11Rear cover

12Knock pin

13Seal washer

14Cam ring

15Vane

16Rotor
17Side plate
Tightening torque: N⋅m (kg-m, ft-lb)
T1: 16±2 (1.6±0.2, 11.6±1.4)
T2: 61±7 (6.2±0.7, 45.0±5.2)
T3: 74±5 (7.5±0.5, 54.2±3.6)
B4M0561A
1) Oil pump body
(1) Place oil pump in a vise, and remove two bolts
which secure tank.
CAUTION:
Do not place oil pump directly in vise; use soft pads
and hold oil pump lightly to protect it.
75
4-3SERVICE PROCEDURE
9. Oil Pump (Power Steering System)

G4M0178
(2) Remove four bolts which secure rear cover.
G4M0923
(3) Remove the following parts from front casing.

1Seal washer

2Knock pin ...............................................................2 ea.

3Cam ring

4Rotor

5Vane .....................................................................10 ea.

6Side plate

7O-ring .....................................................................2 ea.
CAUTION:
Discard old seal washer; replace with a new one.
G4M0180
2) Control valve
Slightly loosen outlet connector, and remove connector.
Remove the following parts for pump casing.

Spool valve assembly

Flow control spring

Connector

O-ring
G4M0181
3) Shaft
(1) Remove snap ring from front casing.
76
4-3SERVICE PROCEDURE
9. Oil Pump (Power Steering System)

G4M0182
(2) Remove shaft using a hand press.
CAUTION:

Discard old drive shaft assembly; replace with a new
one.

Be careful not to scratch or dent casing’s surface
which serves as a seal.
G4M0183
(3) Pry oil seal off using a screwdriver.
CAUTION:
Be careful not to scratch inner surface of casing.
4) Remove pressure switch.
D: INSPECTION
Perform the following inspection procedures and repair or
replace defective parts.
Part name Description Remedy
1. Front casing1) Damage on body surfaces
2) Excessive wear on hole, into which spool valve
is inserted.
3) Wear and damage on cartridge assembly mount-
ing surface
4) Wear and damage on surfaces in contact with
shaft and oil sealReplace with a new one together with spool valve
as selective fit is made.
2. Rear cover1) Damage on body surfaces
2) Wear and damage on sliding surfacesReplace with a new one.
3. Shaft1) 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 damageReplace with a new one.
4. Side plate Wear and damage on sliding surfaces Replace with a new one.
5. Cam ring Ridge wear on sliding surfaces
If damage is serious, replace with a new cartridge
assembly. 6. Vane Excessive wear on nose radius and side surfaces
7. Rotor1) 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 removalCorrect with oil stone. If damage is serious, replace
with a new cartridge assembly.
8. Spool valve Damage or burrs on sliding surface peripheryReplace with a new one together with front casing
as selective fit is made.
9. Connector Damage on threads Replace with a new one.
10. Spring Damage Replace with a new one.
11. Bolts and nuts Damage on threads Replace with a new one.
77
4-3SERVICE PROCEDURE
9. Oil Pump (Power Steering System)

G4M0186
3) Cartridge assembly
(1) Apply specified hydraulic oil to O-rings and fit them
into front casing.
(2) Install side plate to front casing.
CAUTION:
Use care not to let side plate gall.
G4M0187
(3) Mount rotor onto shaft.
(4) Install 10 vanes into rotor with their nose radius
facing toward cam ring.
(5) Install cam ring to front casing, securing with knock
pins.
CAUTION:
Do not use hammer to fit knock pins in position.
G4M0188
4) Rear cover
(1) Mount seal washer on front casing.
(2) With knock pin positions aligned, install rear cover.
Tightening torque:
16±2 N⋅m (1.6±0.2 kg-m, 11.6±1.4 ft-lb)
CAUTION:
Loosely tighten bolts in the sequence
1,3,2, and4
shown in figure. Then, tighten in the same sequence.
G4M0189
5) Spool Valve
(1) Install spring into front casing. Then, with spool
valve dipped in specified hydraulic oil, install it into the
front casing.
(2) Using a 5-mm dia. round bar, ensure that valve
moves smoothly.
(3) Set O-ring, with grease applied to it, onto connec-
tor and secure connector to front casing.
Tightening torque:
74±5 N⋅m (7.5±0.5 kg-m, 54.2±3.6 ft-lb)
CAUTION:

Use care to prevent damage to O-ring at installation.

When tightening connector, ensure that O-ring does
not protrude or get caught.
79
4-3SERVICE PROCEDURE
9. Oil Pump (Power Steering System)