2001 INFINITI QX4 wheel

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

General SpecificationsNBST0037
Applied modelAll
Steering modelPower steering
Steering gear typePR32K
Steering overall gear ratio 17.2
Turns of steering wheel
(Lock to lock)3.09
Steering column type Collapsible, tilt
Steering WheelNBST0038Unit: mm (in)
Steering wheel axial play0 (0)
Steering wheel play35 (1.38) or less
Movement of gear housing±2(±0.08) or less
Steering ColumnNBST0039Unit: mm (in)
Steering column length ªL1º 716.7 - 718.7 (28.22 - 28.30)
Steering column lower shaft length ªL
2º 178 - 180 (7.01 - 7.09)
Steering column upper joint length ªL
3º 430.7 - 432.7 (16.96 - 17.04)
SST739C
Steering Transfer GearNBST0041
Rotating torque0.25 - 0.69 N´m (2.5 - 7.0 kg-cm, 2.2 - 6.1 in-lb)
SERVICE DATA AND SPECIFICATIONS (SDS)
General Specifications
ST-32

Steering Gear and LinkageNBST0040
Applied modelAll
Steering gear typePR32K
Tie-rod outer ball jointSwinging force at cotter pin hole: ªAº 4.9 - 47.1 N (0.5 - 4.8 kg, 1.1 - 10.6 lb)
Rotating torque: ªBº 0.3 - 2.9 N´m (3 - 30 kg-cm, 2.6 - 26.0 in-lb)
Axial end play: ªCº 0.1 mm (0.004 in) or less
Tie-rod inner ball jointSwinging force*: ªAº 3.9 - 32.4 N (0.4 - 3.3 kg, 0.9 - 7.3 lb)
Axial end play: ªCº 0.3 mm (0.012 in) or less
Tie-rod standard length ªLº200 mm (7.87 in)
Rack stroke ªSº72.0 mm (2.835 in)
Pinion gear preload without
gear fluidLock to lock
Average rotating torque0.78 - 1.47 N´m (8.0 - 15.0 kg-cm, 6.9 - 13.0 in-lb)
Within±100É from the neutral position
Maximum torque variation0.4 N´m (4 kg-cm, 3.5 in-lb)
Outside the above range
Maximum torque variation0.6 N´m (6 kg-cm, 5.2 in-lb)
*: Measuring point [: 240 mm (9.45 in)]
SST740C
Power SteeringNBST0042
Steering gear typePR32K
Rack sliding force
Under normal operating oil pressure137 - 255 N (14 - 26 kg, 31 - 57 lb)
Retainer adjustment
(Adjustment screw)Initial tightening torque 4.9 - 5.9 N´m (50 - 60 kg-cm, 43 - 52 in-lb)
Retightening torque after loosening 0.2 N´m (2 kg-cm, 1.7 in-lb)
Tightening torque after gear has settled 4.9 - 5.9 N´m (50 - 60 kg-cm, 43 - 52 in-lb)
Returning angle 10É - 20É
Steering wheel turning force
(Measured at one full turn from the neutral position)39 N (4 kg, 9 lb) or less
Fluid capacity (Approximate)0.9(1 US qt, 3/4 Imp qt)
Oil pump maximum pressure 8,630 - 9,219 kPa (88 - 94 kg/cm
2, 1,251 - 1,337 psi)
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SERVICE DATA AND SPECIFICATIONS (SDS)
Steering Gear and Linkage
ST-33

FRONT & REAR SUSPENSION
SECTION
SU
CONTENTS
FRONT SUSPENSION....................................................2
Precautions ..................................................................2
PRECAUTIONS.........................................................2
Preparation ..................................................................2
SPECIAL SERVICE TOOLS........................................2
COMMERCIAL SERVICE TOOLS................................2
Noise, Vibration and Harshness (NVH)
Troubleshooting ...........................................................3
NVH TROUBLESHOOTING CHART............................3
Components.................................................................4
On-vehicle Service.......................................................5
FRONT SUSPENSION PARTS...................................5
FRONT WHEEL ALIGNMENT.....................................6
Coil Spring and Strut Assembly...................................8
COMPONENTS.........................................................8
REMOVAL.................................................................9
DISASSEMBLY..........................................................9
INSPECTION.............................................................9
ASSEMBLY.............................................................10
Stabilizer Bar .............................................................10
REMOVAL AND INSTALLATION...............................10
INSPECTION........................................................... 11
Transverse Link and Lower Ball Joint ....................... 11
REMOVAL AND INSTALLATION............................... 11
INSPECTION...........................................................12
Service Data and Specifications (SDS).....................13
GENERAL SPECIFICATIONS (FRONT).....................13
WHEEL ALIGNMENT (UNLADEN*1)..........................13
LOWER BALL JOINT...............................................13
WHEELARCH HEIGHT (UNLADEN*).........................14
WHEEL RUNOUT AVERAGE*..................................14
REAR SUSPENSION.....................................................15
Precautions ................................................................15
PRECAUTIONS.......................................................15
Preparation ................................................................15
COMMERCIAL SERVICE TOOLS..............................15
Noise, Vibration and Harshness (NVH)
Troubleshooting .........................................................15
Components...............................................................16
On-vehicle Service.....................................................16
REAR SUSPENSION PARTS...................................16
Removal and Installation ...........................................17
Coil Spring and Shock Absorber ...............................18
COMPONENTS.......................................................18
REMOVAL AND INSTALLATION...............................19
INSPECTION...........................................................19
Upper Link, Lower Link and Panhard Rod ................19
INSPECTION...........................................................19
BUSHING REPLACEMENT.......................................19
INSTALLATION........................................................20
Stabilizer Bar .............................................................20
REMOVAL AND INSTALLATION...............................20
Service Data and Specifications (SDS).....................20
GENERAL SPECIFICATIONS (REAR).......................20
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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

Noise, Vibration and Harshness (NVH)
Troubleshooting
=NBSU0035NVH TROUBLESHOOTING CHARTNBSU0035S01Use the chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.
Reference page
SU-4, 16
SU-8, 18
Ð
Ð
Ð
SU-8, 18
SU-6
SU-10, 20
SU-6
Ð
Ð
Ð
Ð
Ð
Ð
PD-3
PD-3
AX-3
AX-3
Refer to SUSPENSION
in this chart.
Refer to TIRES
in this chart.
Refer to ROAD WHEEL
in this chart.
BR-6
ST-6
Possible cause and
SUSPECTED
PA R T S
Improper installation, looseness
Shock absorber deformation,
damage or deflection
Bushing or mounting deterioration
Parts interference
Spring fatigue
Suspension looseness
Incorrect wheel alignment
Stabilizer bar fatigue
Out-of-round
Imbalance
Incorrect air pressure
Uneven tire wear
Deformation or damage
Non-uniformity
Incorrect tire size
PROPELLER SHAFT
DIFFERENTIAL
DRIVE SHAFT
AXLE
SUSPENSION
TIRES
ROAD WHEEL
BRAKES
STEERING Symptom
SUSPENSION
Noise´ ´ ´´´´ ´´´´ ´ ´ ´´
Shake´´´´´ ´´´ ´´´´
Vibration´ ´ ´´´ ´ ´´ ´ ´
Shimmy´´´´ ´ ´ ´ ´´´
Judder´´´ ´ ´ ´´´
Poor quality
ride or han-
dling´ ´ ´´´ ´´ ´ ´ ´
TIRES
Noise´ ´´´´´´ ´´´´ ´ ´ ´´
Shake´ ´´´´´ ´´ ´´ ´ ´ ´´
Vibration´´´´´´ ´
Shimmy´ ´´´´´´´ ´ ´ ´ ´´
Judder´ ´´´´´ ´ ´ ´ ´ ´´
Poor quality
ride or han-
dling´ ´´´´´ ´ ´ ´ ´
ROAD WHEEL
Noise´ ´´ ´ ´´´´ ´ ´ ´´
Shake´ ´´ ´ ´ ´´ ´ ´ ´´
Shimmy,
Judder´´´´´´´´´
Poor quality
ride or han-
dling´´´´´´´
´: Applicable
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FRONT SUSPENSION
Noise, Vibration and Harshness (NVH) Troubleshooting
SU-3

SMA525A
On-vehicle Service
FRONT SUSPENSION PARTSNBSU0005Check front axle and front suspension parts for excessive play,
cracks, wear and other damage.
1. Shake each front wheel to check for excessive play.
2. Retighten all axle and suspensions nuts and bolts to the speci-
fied torque.
Tightening torque:
Refer to ªComponentsº, SU-8.
SFA392B
3. Check strut (shock absorber) for oil leakage and other dam-
age.
4. Check suspension ball joint for grease leakage and ball joint
dust cover for cracks and other damage.
If ball joint dust cover is cracked or damaged, replace ball joint
assembly.
5. Check suspension ball joint end play.
a. Jack up front of vehicle and set the stands.
b. Clamp dial indicator onto transverse link and place indicator tip
on lower edge of brake caliper.
c. Make sure front wheels are straight and brake pedal is
depressed.
SFA745B
d. Place a pry bar between transverse link and knuckle.
e. While raising and releasing pry bar, observe maximum dial
indicator value.
Vertical end play:
0mm(0in)
If ball joint vertical end play exists, remove lower ball joint
assembly and recheck the ball joint. Refer to ªTranverse Link
and Lower Ball Jointº, SU-11.
SFA746B
6. Check spring height from top of wheelarch to ground using the
following procedure.
a. Park vehicle on a level surface with vehicle unladen*.
*: Fuel, radiator coolant and engine oil full. Spare tire, jack,
hand tools and mats in designated positions.
b. Check tires for proper inflation and wear (tread wear indicator
must not be showing).
c. Bounce vehicle up and down several times and measure
dimensions Hf and Hr. Refer to SDS, SU-14.
Spring height is not adjustable. If out of specification, check for
worn springs and suspension parts.
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FRONT SUSPENSION
On-vehicle Service
SU-5