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Home >> Infiniti >> 2011 >> M37x AWD V6-3.7L (VQ37VHR) >> Repair and Diagnosis >> Steering and Suspension >> Steering >> Power Steering >> Power Steering Pump >> Service and Repair >> Disassembly And Assembly

Disassembly And Assembly





POWER STEERING OIL PUMP


VQ37VHR : Disassembly and Assembly


DISASSEMBLY

Without 4WAS

CAUTION:
- Fix oil pump with a vise if necessary.
- Use copper plates when fixing with a vise.
1. Perform inspection before disassembly. Inspection.
2. Remove rear cover mounting bolts, and then remove rear cover from body assembly.
3. Remove O-ring from body assembly.
4. Remove rear side plate from cartridge, and then remove Teflon ring and O-ring from rear side plate.
5. Remove snap ring using a snap ring pliers, and remove pulley from body assembly.

CAUTION:
Remove pulley so as not to be damaged when removing rotor snap ring.
6. Remove flow control valve, flow control valve spring, and flow control valve sub assembly from body assembly.

CAUTION:
Never drop and damage flow control valve, and flow control valve sub assembly when removing.
7. Remove oil seal from body assembly.
8. Remove mounting bolt of suction pipe, and then remove suction pipe from body assembly.
9. Remove O-ring from body assembly.
10. Remove bracket mounting bolts, and then remove bracket from body assembly.
11. Perform inspection after disassembly. Inspection.

With 4WAS

CAUTION:
- Fix oil pump with a vise if necessary.
- Use copper plates when fixing with a vise.
1. Perform inspection before disassembly. Inspection.
2. Remove rear cover mounting bolts, and then remove rear cover from body assembly.
3. Remove gasket from body assembly.
4. Remove dowel pin, cartridge, and side plate from body assembly.
5. Remove pulley mounting nut and washer, and then remove pulley from drive shaft assembly.
6. Remove bracket mounting bolts, and then remove bracket from body assembly.





7. Remove snap ring from drive shaft assembly and press out it.

CAUTION:
When removing snap ring, be careful not to damage drive shaft assembly.
8. Remove oil seal from body assembly using a suitable tool.

CAUTION:
When removing oil seal, be careful not to damage body assembly.
9. Remove O-ring from body assembly.
10. Remove connector bolt, and then remove O-ring, flow control valve, and flow control valve spring from body assembly
CAUTION:
Never drop and damage flow control valve when removing.
11. Remove mounting bolt of suction pipe, and then remove suction pipe from body assembly.
12. Remove O-ring from suction pipe.
13. Perform inspection after disassembly. Inspection.

ASSEMBLY

Without 4WAS

CAUTION:
- Fix oil pump with a vise if necessary.
- Use copper plates when fixing with 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 a drift [SST: ST35300000 ( -- )].

CAUTION:
Never reuse oil seal.
2. Install bracket to body assembly.
3. If dowel pin has been removed, insert it into body assembly by hand. If it cannot be inserted by hand, lightly tap with a hammer.
4. Install flow control valve, flow control valve spring and flow control valve sub assembly to body assembly.





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:
Never damage oil seal when installing pulley.





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 drift (commercial service tool).

CAUTION:
- Never damage rotor and pulley shaft.
- 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.

CAUTION:
Never reuse O-ring.
13. Apply recommended fluid to O-ring, and then install O-ring to rear side plate.

CAUTION:
Never reuse O-ring.
14. Apply recommended fluid to Teflon ring, and then install Teflon ring to rear side plate.

CAUTION:
Never reuse Teflon ring.
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.

CAUTION:
Never reuse O-ring.
17. Install suction pipe to body assembly, and then tighten mounting bolts to the specified torque.
18. Perform inspection after assembly. Inspection.

With 4WAS

CAUTION:
- Fix oil pump with a vise if necessary.
- Use copper plates when fixing with a vise.





1. Apply recommended grease to oil seal lips (1). Apply recommended fluid to around oil seal. Install oil seal to body assembly using a drift.

CAUTION:
Never reuse oil seal.
2. Apply recommended fluid to drive shaft, and press drive shaft into body assembly, then install snap ring.

CAUTION:
Never reuse snap ring.
3. Apply recommended fluid to O-ring, and install O-ring into body assembly.

CAUTION:
Never reuse O-ring.





4. Install side plate to body assembly.





5. Install dowel pin (1) into dowel pin hole (A), and install cam ring
(2) pointing it's D1 side toward the body assembly (3) side as shown in the figure.

CAUTION:
- When installing the cam-ring, turn carved face with a letter "E" (B) of it to the rear cover.
- Never confuse the assembling direction of the cam ring. If cam ring is installed facing the incorrect direction, it may cause pump operation malfunction.





6. Install rotor to body assembly.

CAUTION:
When installing the rotor, turn punch mark face on rotor to body assembly.





7. Install vane to rotor so that arc of vane faces cam ring side.
8. Check if drive shaft assembly turns smoothly.
9. Install gasket to body assembly.

CAUTION:
Never reuse gasket.
10. Install rear cover to body assembly, and then tighten mounting bolts to the specified torque.
11. Install bracket to body assembly, and then tighten mounting bolts to the specified torque.
12. Install pulley and washer to drive shaft, and then tighten mounting nut to the specified torque.
13. Install spring and flow control valve to body assembly.
14. Apply recommended fluid to O-ring, and then install O-ring to connector bolt.

CAUTION:
Never reuse O-ring.
15. Install connector bolt to body assembly, and then tighten connector bolt to the specified torque.
16. Install suction pipe to body assembly, and then tighten mounting bolts to the specified torque.
17. Perform inspection after assembly. Inspection.
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