2001 INFINITI QX4 vin

6. If rack sliding force is not within specification, overhaul steer-
ing gear assembly.
7. If rack sliding force is OK, inspect steering column. Refer to
ªInspectionº, ªSTEERING WHEEL AND STEERING
COLUMNº, ST-14.
SST834-F
Checking Hydraulic SystemNBST0015Before starting, check belt tension, driving pulley and tire pressure.
1. Set Tool. Open shut-off valve. Then bleed air.
Refer to ªBleeding Hydraulic Systemº, ST-9.
2. Run engine, at idle speed or 1,000 rpm.
Make sure fluid temperature in reservoir tank rises to 60 to
80ÉC (140 to 176ÉF).
WARNING:
Warm up engine with shut-off valve fully opened. If engine is
started with shut-off valve closed, fluid pressure in the power
steering pump increase to maximum. This will raise fluid tem-
perature abnormally.
3. Check pressure with steering wheel fully turned to left and right
positions with engine idling at 1,000 rpm.
CAUTION:
Do not hold the steering wheel in a locked position for more
than 15 seconds.
Power steering pump maximum operating pressure:
8,630 - 9,219 kPa
(88 - 94 kg/cm
2, 1,251 - 1,337 psi)
IIf pressure reaches maximum operating pressure, system is
OK.
IIf pressure increases above maximum operating pressure,
check power steering pump flow control valve. Refer to ST-28.
4. If power steering pressure is below the maximum operating
pressure, slowly close shut-off valve and check pressure
again.
CAUTION:
Do not close shut-off valve for more than 15 seconds.
IIf pressure increases to maximum operating pressure, gear
should be damaged. Refer to ªRemoval and Installationº,
ST-18.
IIf pressure remains below maximum operating pressure, pump
should be damaged. Refer to ªDisassemblyº, ST-28.
5. After checking hydraulic system, remove Tool and add fluid as
necessary. Then completely bleed air out of system. Refer to
ST-9.
ON-VEHICLE SERVICE
Checking Steering Wheel Turning Force (Cont'd)
ST-10

ComponentsNBST0016
SST843C
1. Air bag module
2. Steering wheel3. Spiral cable
4. Combination switch5. Steering column assembly
6. Column cover
CAUTION:
IThe rotation of the spiral cable (SRS ªAIR BAGº compo-
nent part) is limited. If the steering gear must be removed,
set the front wheels in the straight-ahead direction. Do not
rotate the steering column while the steering gear is
removed.
IRemove the steering wheel before removing the steering
lower joint to avoid damaging the SRS spiral cable.
SBF812E
Removal and InstallationNBST0017STEERING WHEELNBST0017S011. Remove air bag module and spiral cable. Refer to RS-17,
ªRemoval Ð Air Bag Module and Spiral Cableº.
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STEERING WHEEL AND STEERING COLUMN
Components
ST-11

Removal and InstallationNBST0027
SST614C
1. Gear and linkage assembly
2. Rack mounting insulator3. Gear housing mounting bracket 4. Cotter pin
SFA756B
CAUTION:
IThe rotation of the spiral cable (SRS ªAIR BAGº compo-
nent part) is limited. If the steering gear must be removed,
set the front wheels in the straight-ahead direction. Do not
rotate the steering column while the steering gear is
removed.
IRemove the steering wheel before removing the steering
lower joint to avoid damaging the SRS spiral cable.
IDetach tie-rod outer sockets from knuckle arms with Tool.
SST615C
IInstall pipe connector.
IObserve specified tightening torque when tightening high-pres-
sure and low-pressure pipe connectors. Excessive tightening
will damage threads of connector or O-ring.
Connector tightening torque:
Low-pressure side ª1º
30 - 35 N´m (3.1 - 3.6 kg-m, 22 - 26 ft-lb)
High-pressure side ª2º
30 - 35 N´m (3.1 - 3.6 kg-m, 22 - 26 ft-lb)
IThe O-ring in low-pressure pipe connector is larger than that
POWER STEERING GEAR AND LINKAGE
Removal and Installation
ST-18

in high-pressure connector. Take care to install the proper
O-ring.
SST616C
IInitially, tighten nut on tie-rod outer socket and knuckle arm to
64 to 69 N´m (6.5 to 7.0 kg-m, 47 to 51 ft-lb). Then tighten fur-
ther to align nut groove with first pin hole so that cotter pin can
be installed.
CAUTION:
Tightening torque must not exceed 108 N´m (11.0 kg-m, 80 ft-
lb).
SST819A
IBefore removing steering column lower joint from gear, set
gear in neutral (wheels in straight-ahead position). After
removing steering column lower joint, put matching mark on
pinion shaft and pinion housing to record neutral position.
ITo install, set left and right dust boots to equal deflection.
Attach steering column lower joint by aligning matching marks
of pinion shaft and pinion housing.
SST617C
ITighten gear housing mounting bracket bolts in the order
shown.
Secure tightening torque:
118 - 137 N´m (12 - 14 kg-m, 87 - 101 ft-lb)
SST718CA
DisassemblyNBST00281. Prior to disassembling, measure pinion rotating torque. Record
the pinion rotating torque as a reference.
IBefore measuring, disconnect cylinder tube and drain
fluid.
IUse soft jaws when holding steering gear housing. Handle
gear housing carefully, as it is made of aluminum. Do not
grip cylinder in a vise.
2. Remove pinion gear.
Be careful not to damage pinion gear when removing pinion
seal ring.
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POWER STEERING GEAR AND LINKAGE
Removal and Installation (Cont'd)
ST-19

DisassemblyNBST0034CAUTION:
IParts which can be disassembled are strictly limited.
Never disassemble parts other than those specified.
IDisassemble in as clean a place as possible.
IClean your hands before disassembly.
IDo not use rags; use nylon cloths or paper towels.
IFollow the procedures and cautions in the Service
Manual.
IWhen disassembling and reassembling, do not let foreign
matter enter or contact the parts.
1. Fix power steering pump to vise.
CAUTION:
When fixing the pump to vise, use an aluminum plate or such
to avoid damaging the fitting plane of the steering pump.
2. Remove the front bracket mounting bolt, and remove the front
bracket from the casing.
3. Remove the rear cover mounting bolt, and remove the rear
cover from the casing.
4. Remove the O-ring from the casing.
SST926C
5. Remove side plate (rear side) from cam ring, then remove side
plate inner/outer seals from side plate (rear side).
6. Remove rotor snap ring using snap ring pliers, and remove
pulley from casing.
CAUTION:
Do not damage pulley shaft when removing rotor snap ring.
SST928C
7. Remove the followings from casing.
ICam ring
IRotor
IVane
ISide plate (front side)
IFlow control A valve
IFlow control valve spring
IFlow control B valve assembly
CAUTION:
Be careful not to drop flow control valve.
8. Remove inlet connector mounting bolt, and remove inlet con-
nector from casing.
9. Remove inlet connector seal from inlet connector.
10. Remove drive shaft seal from casing with a screwdriver.
CAUTION:
Do not damage casing surface with the screwdriver.
POWER STEERING OIL PUMP
Disassembly
ST-28

InspectionNBST0035IIf pulley is cracked or deformed, replace it.
IIf an oil leak is found around pulley shaft oil seal, replace the
seal.
ICheck the casing and the inside of the rear body for damage.
If damages are found in the rear body, replace the entire rear
body. If the casing is damaged, replace the entire power steer-
ing pump as an assembly.
ICheck the cam ring for damage. If damage is found, replace
the cam ring, rotor and vane as a set.
ICheck the side plates (front and rear) for damage. If damage
is found, replace the side plates as a set (front and rear).
SST934C
AssemblyNBST00361. Apply grease to the lip of the drive shaft seal, and attach the
casing.
CAUTION:
The drive shaft seal cannot be reused. Always replace after
every disassembly.
SST928C
2. When removing the dowel pin, if it is difficult to insert with your
hands, insert into the casing by tapping lightly with a hammer
or similar tool.
3. Attach the flow control A valve, flow control valve spring, and
the flow control B valve assembly to the locations indicated in
the drawing left.
SST929C
4. Match the dowel pin A on the flow control A valve side with the
notch B of the side plate (front), and attach the side plate (front)
to the casing.
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POWER STEERING OIL PUMP
Inspection
ST-29

SBR686C
Precautions
PRECAUTIONSNBSU0001IWhen installing rubber parts, final tightening must be car-
ried out under unladen condition* with tires on ground.
*Fuel, radiator coolant and engine oil full. Spare tire, jack,
hand tools and mats in designated positions.
IUse flare nut wrench when removing and installing brake
tubes.
IAfter installing removed suspension parts, check wheel
alignment and adjust if necessary.
IAlways torque brake lines when installing.
Preparation
SPECIAL SERVICE TOOLSNBSU0002The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool nameDescription
ST29020001
(J24319-01)
Ball joint remover
NT694
Removing tie-rod outer end and lower ball joint
a: 34 mm (1.34 in)
b: 6.5 mm (0.256 in)
c: 61.5 mm (2.421 in)
COMMERCIAL SERVICE TOOLSNBSU0003
Tool name Description
1 Flare nut crowfoot
2 Torque wrench
NT360
Removing and installing each brake piping
a: 10 mm (0.39 in)
Spring compressor
NT717
Removing and installing coil spring
FRONT SUSPENSION
Precautions
SU-2

SFA725B
ASSEMBLYNBSU0011IWhen installing coil spring on strut, it must be positioned as
shown in the figure at left.
SFA664AA
IInstall upper spring seat with its cutout facing the inner side of
vehicle.
SFA767B
Stabilizer Bar
REMOVAL AND INSTALLATIONNBSU0012IRemove stabilizer bar and connecting rod.
SFA768B
IWhen installing stabilizer, make sure that paint mark and
bracket face in their correct directions.
SFA769B
IWhen removing and installing stabilizer bar fix portion A.
FRONT SUSPENSION
Coil Spring and Strut Assembly (Cont'd)
SU-10