Power Steering Pump: Service and Repair

Pre-disassembly Inspection
Disassemble the power steering oil pump only if the following items are found.





- Oil leak from any point shown in the figure
- Deformed or damaged pulley
- Poor performance

Disassembly

CAUTION:
- Parts which can be disassembled are strictly limited. Never disassemble parts other than those specified.
- Disassemble in as clean a place as possible.
- Clean your hands before disassembly.
- Do not use rags; use nylon cloths or paper towels.
- Follow the procedures and cautions.
- When disassembling and reassembling, do not let foreign matter enter or contact the parts.





- Remove snap ring, then draw drive shaft out. Be careful not to drop drive shaft.





- Remove oil seal. Be careful not to damage front housing.





- Remove connector and flow control valve with spring. Be careful not to drop flow control valve. Do not disassemble flow control valve.

Inspection
- If pulley is cracked or deformed, replace it.
- If an oil leak is found around pulley shaft oil seal, replace the seal.
- If serration on pulley or pulley shaft is deformed or worn, replace it.

Assembly
Assemble oil pump, noting the following instructions.





- Make sure O-rings and oil seal are properly installed.
- Always install new O-rings and oil seal.
- Be careful of oil seal direction.
- Cam ring, rotor and vanes must be replaced as a set if necessary.
- Coat each part with Genuine Nissan PSF II or equivalent when assembling.





- Pay attention to the direction of rotor.





- When assembling vanes to rotor, rounded surfaces of vanes must face cam ring side.





- Insert pin 2 into pin groove 1 of front housing and front side plate. Then install cam ring 3 as shown.
Cam ring: D1 is less than D2.