NISSAN X-TRAIL 2003 Electronic Repair Manual

POWER STEERING GEAR AND LINKAGE
PS-21
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23. Using a preload gauge, measure rotational torque of pinion gear.
Check that reading is within range specified. If reading is outside
specification, readjust rack. If reading is still outside specifica-
tion, replace power steering gear.
24. With tie rod gear installed to gear assembly, turn pinion gear
fully to left.
25. Set dial gauge as shown in figure. Measure vertical movement
of rack when pinion is turned counterclockwise with torque of 4.9
N·m (0.5 kg·m,43in·lb). Check reading is within range specified.
If reading is outside of specification, readjust rack. If reading is
still outside of specification, replace power steering gear.
26. Position boot band on large-diameter side before installing it.
27. Apply multi-purpose grease to both large- and small- diameter
sides.
28. Install small-diameter side of boot to inner socket boot mounting
groove.
29. Install boot band to small-diameter side of boot.
30. Install boot band.
a. Tighten large-diameter side of RH/LH boot with boot clamp
(stainless wire).
b. Wrap clamp around boot groove for two turns. Insert screwdriv-
ers in loops on both ends of wire. Twist 4 to 4.5 turns while pull-
ing them with force of approx. 98 N (10 kg,22.1 lb).Rotational torque
of pinion gear: Around neutral position
{within±11.5 mm (0.453 in)}
Average A : 167 - 225 N·m (17 - 23
kg·m,123-166 ft·lb)
Maximum varia-
tion B: 98 N·m (10 kg·m,72 ft·lb)
Other than above
Average A : 294 N·m (30 kg·m,217 ft·lb)
Maximum varia-
tion B: 147 N·m (15 kg·m,108 ft·lb)
SGIA0098E
Specification : 0.08 mm (0.0031 in) or less
SGIA0099E
Measuring point in shown in figure at right.Rack axle direction 5 mm from housing vertical surface
Rack radial direction Direction of adjusting screw
SGIA0024E
Wire length (L) : 370 mm (14.57 in)
SST097B

PS-22
POWER STEERING GEAR AND LINKAGE
c. Twist boot clamp as shown. Pay attention to relationship
between winding and twisting directions.
d. Twisted point should face front of vehicle with gear installed on
vehicle (to prevent interference with other parts).
e. After twisting wire 4 to 4.5 turns, bend cut end of wire.Cut end of
wire should not touch boot. Be sure wire end is at least 5 mm
(0.20 in) away from clearance for tube.
31. Connect lock nut and outer socket to inner socket. Temporarily
tighten lock nut until length of tie rod is within specification.
CAUTION:
Perform toe-in adjustment after this procedure. Length
achieved after toe-in adjustment is not necessarily value given
here.
SST440A
SGIA0025E
STC0124D
Tie rod length (L) : 169.67 mm (6.68 in)
STC0125D

POWER STEERING OIL PUMP
PS-23
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POWER STEERING OIL PUMPPFP:49110
On-Vehicle Inspection and ServiceEGS000AF
OIL PUMP PULLEY HYDRAULIC PRESSURE INSPECTION
Before starting following procedure, check tension of belt.
1. Raise vehicle. Connect oil pressure gauge between oil pump
discharge connector and high pressure hose. Then bleed the
hydraulic circuit.
2. Start engine. Run engine until oil temperature reaches 50°C-
60°C (122 - 140°F)
CAUTION:
lLeave valve of hydraulic pressure gauge fully open while
starting and running engine. If engine is started with
valve closed, hydraulic pressure in oil pump goes up.
This will relief pressure along with abnormal increase of
oil temperature.
lCare must be taken to keep hose clear of belt and other parts when engine is started.
3. Fully close hydraulic pressure gauge valve with engine at idle. Measure relief pressure.
4. After measurement, open valve slowly.
CAUTION:
Never keep valve closed for 15 seconds or longer.
lIf relief pressure is outside specification, disassemble and service oil pump. Refer toPS-24, "Disas-
sembly and Assembly(QR20DE engine model)".
5. After inspection, remove oil pressure gauge from hydraulic circuit. Add fluid. Be sure to bleed the system
completely. Refer toPS-5, "
Bleeding Hydraulic System"
Removal and Installation (QR20DE engine model)EGS000AG
REMOVAL
1. Loosen adjusting screw and oil pump mounting bolt. Then, remove belt.
2. Remove union bolt and hose for oil pump.
3. Remove oil pump bracket attaching bolt.
4. Remove oil pump from vehicle.
INSTALLATION
Paying attention to following items, install in the reverse order of removal.
lAfter installation, adjust belt tension. Refer to “Accessory belt” in ”B1 Engine Body”.
lAfter installation, be sure to bleed system. Refer toPS-5, "Bleeding Hydraulic System". Relief pressure specification:
: 8.3 + 0.4 - 0.2 MPa (85 + 4 - 2 kg/cm
2)
SST834-H

PS-24
POWER STEERING OIL PUMP
Disassembly and Assembly(QR20DE engine model)
EGS000AH
INSPECTION BEFORE DISASSEMBLY
Disassemble the power steering oil pump only if the following items
are found.
lOil leak from any point shown in the figure
lDeformed or damaged pulley
lPoor performance
DISASSEMBLY
1. Fix power steering pump in a vise.
CAUTION:
When fixing pump in a vise, use aluminum plates to protect steering pump mounting surface.
2. Remove rear bracket mounting bolts. Remove rear bracket from rear body.
3. Remove three front bracket attaching bolts and remove front bracket from casing.
4. Remove four rear body attaching bolts and remove rear body from casing.
5. Remove body seal from casing.
6. Remove side plate (rear) from cartridge. Remove side plate inner and outer seals from side plate (rear).
SGIA0012E
1 Pulley 2 Front bracket 3 Drive shaft seal
4 Casing 5 Inlet connector seal 6 Inlet connector
7 Flow control valve spring 8 Flow control A valve 9 Dowel pin
10 Flow control B valve assembly 11 Side plate (front) 12 Cartridge
13 Rotor 14 Vane 15 Rotor snap ring
16 Side plate (rear) 17 Side plate inner seal 18 Side plate outer seal
19 Body seal 20 Rear body 21 Rear bracket
SST984A

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

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

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

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

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

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