Power Steering Pump: Service and Repair

PRE DISASSEMBLY INSPECTION





Disassemble the power steering oil pump only if the following items are found.
^ Fluid 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.
^ Refer to "Precautions for Steering System", ST-2.
^ 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, flat surfaces of vanes must face inside of rotor (rounded surfaces of vanes 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 at left.
Cam ring: D1 is less than D2.