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Infiniti QX4 (R50). Manual - part 554

General Specifications

NBST0037

Applied model

All

Steering model

Power steering

Steering gear type

PR32K

Steering overall gear ratio

17.2

Turns of steering wheel
(Lock to lock)

3.09

Steering column type

Collapsible, tilt

Steering Wheel

NBST0038

Unit: mm (in)

Steering wheel axial play

0 (0)

Steering wheel play

35 (1.38) or less

Movement of gear housing

2 (

0.08) or less

Steering Column

NBST0039

Unit: mm (in)

Steering column length “L

”

716.7 - 718.7 (28.22 - 28.30)

Steering column lower shaft length “L

”

178 - 180 (7.01 - 7.09)

Steering column upper joint length “L

”

430.7 - 432.7 (16.96 - 17.04)

SST739C

Steering Transfer Gear

NBST0041

Rotating torque

0.25 - 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 Linkage

NBST0040

Applied model

All

Steering gear type

PR32K

Tie-rod outer ball joint

Swinging force at cotter pin hole: “A”

4.9 - 47.1 N (0.5 - 4.8 kg, 1.1 - 10.6 lb)

Rotating torque: “B”

0.3 - 2.9 N·m (3 - 30 kg-cm, 2.6 - 26.0 in-lb)

Axial end play: “C”

0.1 mm (0.004 in) or less

Tie-rod inner ball joint

Swinging force*: “A”

3.9 - 32.4 N (0.4 - 3.3 kg, 0.9 - 7.3 lb)

Axial end play: “C”

0.3 mm (0.012 in) or less

Tie-rod standard length “L”

200 mm (7.87 in)

Rack stroke “S”

72.0 mm (2.835 in)

Pinion gear preload without
gear fluid

Lock to lock
Average rotating torque

0.78 - 1.47 N·m (8.0 - 15.0 kg-cm, 6.9 - 13.0 in-lb)

Within

100° from the neutral position

Maximum torque variation

0.4 N·m (4 kg-cm, 3.5 in-lb)

Outside the above range
Maximum torque variation

0.6 N·m (6 kg-cm, 5.2 in-lb)

*: Measuring point [

: 240 mm (9.45 in)]

SST740C

Power Steering

NBST0042

Steering gear type

PR32K

Rack sliding force
Under normal operating oil pressure

137 - 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

10° - 20°

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

, 1,251 - 1,337 psi)

IDX

SERVICE DATA AND SPECIFICATIONS (SDS)

Steering Gear and Linkage

ST-33

NOTES

FRONT & REAR SUSPENSION

SECTION

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

IDX

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