service INFINITI QX4 2001 Factory Service Manual

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

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

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

SFA975B
FRONT WHEEL ALIGNMENTNBSU0006Before checking front wheel alignment, be sure to make a prelimi-
nary inspection (Unladen*).
*: Fuel, radiator coolant and engine oil full. Spare tire, jack, hand
tools and mats in designated positions.
Preliminary InspectionNBSU0006S011. Check tires for wear and improper inflation.
2. Check wheels for deformation, cracks and other damage.
If deformed, remove wheel and check wheel runout.
NOTE:
Measure both the inner and outer sides for the radial runout and
lateral runout, and confirm the figures are within the standards.
Wheel runout (Dial indicator value):
Refer to SDS.
3. Check front wheel bearings for looseness.
4. Check front suspension for looseness.
5. Check steering linkage for looseness.
6. Check that front shock absorbers work properly.
7. Check vehicle posture (Unladen).
SFA894
Camber, Caster and Kingpin InclinationNBSU0006S02Camber, caster and kingpin inclination are preset at factory
and cannot be adjusted.
1. Measure camber, caster and kingpin inclination of both right
and left wheels with a suitable alignment gauge.
Camber, Caster and Kingpin inclination:
Refer to SDS, SU-13.
2. If camber, caster or kingpin inclination is not within
specification, inspect front suspension parts. Replace dam-
aged or worn out parts.
FRONT SUSPENSION
On-vehicle Service (Cont'd)
SU-6

SFA614B
SFA234AC
Toe-inNBSU0006S03Measure toe-in using the following procedure.
WARNING:
IAlways perform the following procedure on a flat surface.
IMake sure that no person is in front of the vehicle before
pushing it.
1. Bounce front of vehicle up and down to stabilize the posture.
2. Push the vehicle straight ahead about 5 m (16 ft).
3. Put a mark on base line of the tread (rear side) of both tires at
the same height of hub center. This mark is a measuring point.
4. Measure distance ªAº (rear side).
5. Push the vehicle slowly ahead to rotate the wheels 180
degrees (1/2 turn).
If the wheels have rotated more than 180 degrees (1/2 turn), try
the above procedure again from the beginning. Never push
vehicle backward.
6. Measure distance ªBº (front side).
Total toe-in:
Refer to SDS, SU-13.
SFA749B
7. Adjust toe-in by varying the length of steering tie-rods.
a. Loosen lock nuts.
b. Adjust toe-in by screwing tie-rods in and out.
SFA486A
Make sure both tie-rods are the same length.
Standard length ªLº:
Refer to ST-33, ªSteering Gear and Linkageº.
c. Tighten lock nuts to specified torque.
Lock nut tightening torque:
Refer to ST-17, ªPOWER STEERING GEAR AND LINK-
AGEº.
SFA439BA
Front Wheel Turning AngleNBSU0006S04Turning angle is set by stroke length of steering gear rack and
cannot be adjusted.
1. Set wheels in straight-ahead position. Then move vehicle for-
ward until front wheels rest on turning radius gauge properly.
2. Rotate steering wheel all the way right and left; measure turn-
ing angle.
Do not hold the steering wheel on full lock for more than 15
seconds.
Wheel turning angle (Full turn):
Refer to SDS, SU-13.
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FRONT SUSPENSION
On-vehicle Service (Cont'd)
SU-7

SFA449BA
IInstall stabilizer bar with ball joint socket properly placed.
ARA027
INSPECTIONNBSU0013ICheck stabilizer for deformation and cracks. Replace if neces-
sary.
ICheck rubber bushings for deterioration and cracks. Replace
if necessary.
ICheck ball joint can rotate in all directions. If movement is not
smooth and free, replace stabilizer bar connecting rod.
SFA757B
Transverse Link and Lower Ball Joint
REMOVAL AND INSTALLATIONNBSU00141. Separate drive shaft from knuckle.
Refer to AX-10, ªDrive Shaftº.
2. Separate lower ball joint stud from knuckle.
3. Remove lower ball joint assembly from transverse link.
4. Remove transverse link.
5. During installation, final tightening must be carried out at curb
weight with tires on ground.
6. After installation, check wheel alignment.
Refer to ªFRONT WHEEL ALIGNMENTº, ªOn-vehicle Serviceº,
SU-6.
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FRONT SUSPENSION
Stabilizer Bar (Cont'd)
SU-11

Service Data and Specifications (SDS)
GENERAL SPECIFICATIONS (FRONT)=NBSU0016
Suspension type Independent macpherson strut with coil spring
Strut typeDouble-acting hydraulic
Stabilizer barStandard equipment
WHEEL ALIGNMENT (UNLADEN*1)NBSU0017Unit: Degree minute (Decimal degree)
Applied modelAll
CamberMinimum þ0É35¢(þ0.58É)
Nominal 0É10¢(0.17É)
Maximum 0É55¢(0.92É)
Left and right differ-
ence45¢(0.75É) or less
CasterMinimum 2É15¢(2.25É)
Nominal 3É00¢(3.00É)
Maximum 3É45¢(3.75É)
Left and right differ-
ence45¢(0.75É) or less
Kingpin inclinationMinimum 13É35¢(13.58É)
Nominal 14É20¢(14.33É)
Maximum 15É05¢(15.08É)
Total toe-inDistance (A - B)Minimum 1 mm (0.04 in)
Nominal 2 mm (0.08 in)
Maximum 3 mm (0.12 in)
Angle (left plus right)Minimum 5¢(0.08É)
Nominal 10¢(0.17É)
Maximum 15¢(0.25É)
Wheel turning angle Full turn*2InsideMinimum 30É00¢(30.00É)
Nominal 33É00¢(33.00É)
Maximum 34É00¢(34.00É)
OutsideMinimum 28É00¢(28.00É)
Nominal 31É00¢(31.00É)
Maximum 32É00¢(32.00É)
*1: Fuel, radiator coolant and engine oil full. Spare tire, jack, hand tools and mats in designated positions.
*2: On power steering models, wheel turning force (at circumference of steering wheel) of 98 to 147 N (10 to 15 kg, 22 to 33 lb) with
engine idle.
LOWER BALL JOINTNBSU0018
Swinging force ªAº
(Measuring point: cotter pin hole of ball stud)7.8 - 76.5 N (0.8 - 7.8 kg, 1.8 - 17.2 lb)
Turning torque ªBº 0.5 - 4.9 N´m (5 - 50 kg-cm, 4.3 - 43.4 in-lb)
Vertical end play ªCº0mm(0in)
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FRONT SUSPENSION
Service Data and Specifications (SDS)
SU-13