Infiniti M35/M45 Y50. Manual - part 1005

POWER STEERING OIL PUMP

PS-35

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Disassembly and Assembly (Models with VQ35DE)

NGS000DH

COMPONENTS

INSPECTION BEFORE DISASSEMBLY

Disassemble oil pump only when the following malfunctions occur.

●

If oil leakage is found on oil pump.

●

Oil pump pulley is damaged or deformed.

●

Performance of oil pump is low.

1.

Pulley

2.

Oil seal

3.

Bracket

4.

Body assembly

5.

Suction pipe

6.

O-ring 

7.

Flow control valve B assembly

8.

Flow control valve spring

9.

Flow control valve A

10.

Dowel pin

11.

Front side plate

12. Vane

13.

Rotor

14.

Rotor snap ring

15. Cam ring 

16.

Rear side plate

17.

O-ring

18. Teflon ring

19.

O-ring

20.

Rear cover

21. Cartridge

Refer to 

GI-11, "Components"

 , and the followings for the symbols in the figure.

: Apply power steering fluid.

: Apply multi-purpose grease.

SGIA1188E

PS-36

POWER STEERING OIL PUMP

DISASSEMBLY

NOTE:
Secure oil pump in a vise if necessary.

CAUTION:

Use copper plates when securing in a vise.

1.

Remove rear cover mounting bolts, and then remove rear cover from body assembly.

2.

Remove O-ring from body assembly.

3.

Remove rear side plate from cartridge, and then remove Teflon ring and O-ring from rear side plate.

4.

Remove rotor snap ring using a snap ring plier, and remove pul-
ley from body assembly.

CAUTION:

Remove pulley so as not to be damaged when removing
rotor snap ring.

5.

Remove cartridge, front side plate, flow control valve A, flow
control valve spring and flow control valve B assembly from
body assembly.

CAUTION:

Do not drop and damage flow control valve A and flow con-
trol valve B assembly when removing.

6.

Remove oil seal from body assembly.

7.

Remove mounting bolt of suction pipe, and then remove suction
pipe from body assembly.

8.

Remove O-ring from body assembly.

9.

Remove bracket mounting bolts, and then remove bracket from
body assembly.

INSPECTION AFTER DISASSEMBLY
Body Assembly and Rear Cover Inspection

Check body assembly and rear cover for internal damage. Replace rear cover if it is damaged. Replace oil
pump assembly if body assembly is damaged.

Cartridge Assembly Inspection

Check cam ring, rotor and vane for damage. Replace cartridge assembly if there are.

Side Plate Inspection

Check side plates (front and rear) for damage. Side plates (front and rear) must be replaced as a set if they
are damaged.

Flow Control Valve Inspection

Check flow control valve A, flow control valve spring and flow control valve B assembly for damage. Replace if
there are.

SGIA0059E

SGIA0526E

POWER STEERING OIL PUMP

PS-37

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ASSEMBLY

NOTE:
Secure oil pump in a vise if necessary.

CAUTION:

Use copper plates when securing in a vise.

1.

Apply recommended grease to oil seal lips. Apply recommended
fluid to around oil seal, and then install oil seal to body assembly
using the drift [SST].

2.

Install bracket to body assembly, and then tighten mounting
bolts to the specified torque.

3.

If dowel pin has been removed, insert it into body assembly by
hand. If cannot be inserted by hand, lightly tap with a hammer.

4.

Install flow control valve A, flow control valve spring and flow
control valve B assembly as shown in the figure.

5.

Install front side plate (3) with dowel pin (2) on flow control valve
A (1) side as shown in the figure aligning with front side plate
cutout (A) to body assembly (4).

6.

Install cam ring as shown in the figure.

7.

Install pulley to body assembly.

CAUTION:

Do not damage oil seal when installing pulley.

SGIA0527E

SGIA0526E

SGIA1189E

SGIA0612E

PS-38

POWER STEERING OIL PUMP

8.

Install rotor so that mark faces body assembly, and then install it
to pulley shaft.

9.

Install vane to rotor so that arc of vane faces cam ring side.

10. Install rotor snap ring to slit of pulley shaft using a hammer and a

10 mm (0.39 in) socket.

CAUTION:

●

Do not damage rotor and pulley shaft.

●

Power steering oil pump assembly must be replaced if
rotor is damaged.

11. Install rear side plate with dowel pin A on flow control valve A

side as shown in the figure aligning with rear side plate cutout B
to cartridge.

12. Apply recommended fluid to O-ring, and then install O-ring to

body assembly.

13. Apply recommended fluid to O-ring, and then install O-ring to

rear side plate.

14. Apply recommended fluid to Teflon ring, and then install Teflon

ring to rear side plate.

15. Install rear cover to body assembly, and then tighten mounting

bolts to the specified torque.

16. Apply recommended fluid to O-ring, and then install O-ring to body assembly.

17. Install suction pipe to body assembly.

SGIA0989E

SGIA0613E

SGIA0063E

SGIA0530E