Page 2785 of 3066

POWER STEERING OIL PUMP
PS-25
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7. Remove rotor snap ring using a snap ring pliers and remove pul-
ley from casing.
CAUTION:
When removing rotor snap ring, be careful not to damage
pulley shaft.
8. Remove following parts from casing: cartridge, rotor, vane, side
plate (front), flow control valve A, flow control valve spring, and
flow control valve B assembly
CAUTION:
Do not drop flow control A valve and flow control B valve
assembly to floor. If dropped, they may be deformed.
9. Remove inlet connector attaching bolt and remove inlet connector from casing.
10. Remove inlet connector seal from inlet connector.
11. Using a screwdriver or equivalent tool, remove drive shaft seal from casing.
CAUTION:
Be careful not to damage casing surface with screwdriver.
INSPECTION AFTER DISASSEMBLY
Inspecting Casing and Rear Body
lCheck casing and rear body for internal damage. If rear body is damaged, replace rear body. If casing is
damaged, replace power steering pump assembly.
Cartridge Inspection
lCheck cartridge for damage. If damaged, cartridge, rotor, and vane must be replaced as a set.
Inspecting Side Plate
lCheck side plates (front and rear) for damage. If damaged, side plates (front and rear) must be replaced
as a set.
ASSEMBLY
1. Apply multi-purpose grease to lip of drive shaft seal. Using a
drift, install drive shaft seal to casing.
CAUTION:
Drive shaft seal is not reusable. Never reuse drive shaft
seal.
2. If removed dowel pin cannot be inserted to casing by hand, tap
it with hammer.
3. Connect flow control valve A, flow control valve spring and flow
control valve B assembly as shown.
SGIA0059E
SST038A
SGIA0061E
Page 2786 of 3066
PS-26
POWER STEERING OIL PUMP
4. Align dowel pin A on flow control valve A with notch B in side
plate (front) as shown. Install side plate (front) to casing.
5. Install cartridge onto front side plate with smaller slit of cartridge
facing casing.
6. Connect pulley to casing.
CAUTION:
Be careful not to damage drive shaft seal when installing
pulley.
7. Connect rotor to pulley shaft with punch mark on rotor facing
casing.
SGIA0062E
SST497A
SST289A
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POWER STEERING OIL PUMP
PS-27
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8. Connect vane to rotor with arc of vane in contact with cartridge.
9. Connect rotor snap ring to slit of pulley shaft, using a hammer
and a 10-mm socket.
CAUTION:
lRotor snap ring is not reusable. Never reuse rotor snap
ring.
lBe careful not to damage rotor and pulley shaft.
lIf rotor is damaged, power steering pump assembly must
be replaced.
10. Align dowel pin A on flow control valve A with notch B in side
plate (rear) as shown. Install side plate (rear) to cartridge.
11. Apply Nissan Power Steering Fluid or Nissan Power Steering
Fluid II to body seal. Install it to casing.
CAUTION:
Body seal is not reusable. Never reuse body seal.
12. Apply Nissan Power Steering Fluid II or equivalent to side plate
inner and outer seals. Install them to side plate (rear).
CAUTION:
Side plate inner and outer seals are not reusable. Never
reuse side plate inner and outer seals.
13. Fix power steering pump in a vise.
CAUTION:
When fixing pump in a vise, use aluminum plates to protect
steering pump mounting surface.
14. Attach rear body to casing and tighten four mounting bolts diag-
onally to specified torque.
15. Install rear bracket to rear body. Tighten mounting bolts to specified torque.
16. Connect front bracket to casing and tighten mounting bolts (3) to specified torque.
17. Connect inlet connector seal to inlet connector slit. Install inlet connector to casing with attaching bolts.
CAUTION:
Inlet connector seal is not reusable. Never reuse inlet connector seal.
SST843A
SGIA0063E
SGIA0064E
SGIA0065E
Page 2788 of 3066
PS-28
POWER STEERING OIL PUMP
Removal and Installation (YD22DDTi engine model)
EGS000AI
1. Remove chain case cover.
2. Revolving crank pulley, set tool.
3. Fix tool with chain cover fixing bolts.
4. Using suitable tool, remove sprocket fixing nut and washer.
CAUTION:
Do not remove Tool while power steering oil pump is
removed.
5. Remove power steering pump fixing bolts, then remove it.
6. Apply Gasket to the installation surface of the engine chain case
cover as shown in the figure before installing the chain case
cover to the engine.
7. Bleed air after installation. Refer toPS-5, "
Bleeding Hydraulic
System"
SST884C
SST885C
SST886C
SST890C
Page 2789 of 3066
POWER STEERING OIL PUMP
PS-29
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Disassembly and Assembly (YD22DDTi engine model)EGS000AJ
INSPECTION BEFORE DISASSEMBLY
Disassemble power steering oil pump only when any of following
cases meets.
lIf oil leak is found on oil pump.
lOil pump pulley is deformed or damaged.
lPerformance of oil pump is low.
SST882CA
1 Rear bracket 2 Rear body 3 Dowel pin
4 Side plate seal 5 Cam ring 6 Vane
7 Rotor 8 Side plate 9 O-ring (Outer)
10 O-ring (Inner) 11 Front body 12 Drive shaft rear oil sear
13 Drive shaft front oil seal 14 Drive shaft 15 Snap ring
16 O-ring 17 Outlet connector 18 Connector seal
19 Flow control valve 20 Flow control valve spring 21 Inlet connector
22 O-ring 23 Washer
SST883C
Page 2790 of 3066
PS-30
POWER STEERING OIL PUMP
DISASSEMBLY
CAUTION:
lParts which can be disassembled are strictly limited. Never disassemble parts other than those
specified.
lDisassemble in as clean a place as possible.
lClean your hands before disassembly.
lDo not use rags; use nylon cloths or paper towels.
lFollow the procedure and cautions in the Service Manual.
lWhen disassembling and reassembling, do not let foreign matter enter or contact the parts.
1. Remove rear bracket and rear body.
2. Remove side plate seal, cam ring vane, rotor side and plate.
3. Remove inlet connector and outlet connector with spring.
CAUTION:
lBe careful not to drop the flow control valve.
lDo not disassemble the flow control valve.
4. Remove oil seal
5. Remove snap ring, then draw drive shaft.
CAUTION:
Be careful not to drop drive shaft.
SST887C
SST036A
SST888C
SST889C
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POWER STEERING OIL PUMP
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INSPECTION AFTER DISASSEMBLY
lIf pulley is cracked or deformed, replace it.
lIf an oil leak is found around pulley shaft oil seal, replace the seal.
lIf serration on pulley or pulley shaft is deformed or worn, replace it.
ASSEMBLY
1. Assemble oil pump, noting the following instructions.
lMake sure O-rings and oil seal are properly installed.
lAlways install new O-rings and oil seal.
lBe careful of oil seal direction.
lCam ring, rotor and vanes must be replaced as a set if neces-
sary.
lCoat each part with Nissan power steering fluid II or equiva-
lent when assembling.
2. Pay attention to the direction of rotor.
3. When assembling vanes to rotor, rounded surfaces of vanes
must face cam ring side.
SST036A
SST289A
SST843A
Page 2792 of 3066
PS-32
POWER STEERING OIL PUMP
4. 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 :D
1is less than D2
SST472C