Infiniti QX56 (Z62). Manual — part 738

FSU-12

< REMOVAL AND INSTALLATION >

FRONT COIL SPRING AND SHOCK ABSORBER

When installing the shock absorber attachment to shock absorber, wrap a shop cloth around
shock absorber to protect it from damage.

2.

Compress coil spring using a spring compressor (commercial service tool), and install it onto shock
absorber.

CAUTION:

• Be sure a spring compressor is securely attached to coil spring. Compress coil spring.
• Set coil spring so that its paint marks face downward.

3.

Apply soapy water to dust cover.

CAUTION:

Never use machine oil.

4.

Install dust cover, bound bumper cover, rubber seat, bushings, tube, shock absorber mounting bracket,
and washer to shock absorber.
• Install the shock absorber mounting bracket (1) as shown in

the figure.

• Check that the lower end of the coil spring (B) is positioned at

the spring lower seat of the shock absorber.

5.

Secure piston rod tip so that piston rod does not turn, then
tighten piston rod lock nut to the specified torque.

6.

Gradually release a spring compressor, and remove coil spring.

CAUTION:

Loosen while making sure coil spring attachment position
does not move.

7.

Remove the shock absorber attachment from shock absorber.

Inspection and Adjustment

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INSPECTION AFTER REMOVAL (WITH HBMC)

Shock Absorber assembly

Check shock absorber assembly for oil leakage or other malfunctions. Replace it if necessary.

INSPECTION AFTER DISASSEMBLY (WITHOUT HBMC)

Shock Absorber

Check the following items, and replace the part if necessary.
• Shock absorber for deformation, cracks or damage.
• Piston rod for damage, uneven wear or distortion.
• Oil leakage.

Shock Absorber Mounting Bracket and Rubber Parts Inspection

Check shock absorber mounting bracket for cracks and rubber parts for wear. Replace it if necessary.

Coil Spring

Check coil spring for cracks, wear or damage. Replace it if necessary.

INSPECTION AFTER INSTALLATION

1.

Check wheel sensor harness for proper connection. Refer to

BRC-134, "FRONT WHEEL SENSOR :

Exploded View"

.

2.

Check wheel alignment. Refer to

FSU-7, "Inspection"

.

Angle (a)

: 90

°

A

: Shock absorber mounting bracket bolt

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FRONT COIL SPRING AND SHOCK ABSORBER

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< REMOVAL AND INSTALLATION >

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3.

Adjust neutral position of steering angle sensor. Refer to

BRC-64, "Work Procedure"

.

4.

Adjust levelizer adjustment of height sensor. Refer to

EXL-61, "LEVELIZER ADJUSTMENT : Special

Repair Requirement"

.

ADJUSTMENT AFTER INSTALLATION (WITH HBMC)

Bleed air from the HBMC. Refer to

SCS-18, "Work Procedure"

.

Disposal

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WITHOUT HBMC

1.

Set shock absorber horizontally with the piston rod fully extended.

2.

Drill 2 – 3 mm (0.08 – 0.12 in) hole at the position (

) from top

as shown in the figure to release gas gradually.

CAUTION:

• Wear eye protection (safety glasses).
• Wear gloves.
• Be careful with metal chips or oil blown out by the com-

pressed gas.

NOTE:
• Drill vertically in this direction (

).

• Directly to the outer tube avoiding brackets.
• The gas is clear, colorless, odorless, and harmless.

3.

Position the drilled hole downward and drain oil by moving the piston rod several times.

CAUTION:

Dispose of drained oil according to the law and local regulations.

WITH HBMC

NOTE:
Releasing gas is not required.

A

: 20 – 30 mm (0.79 – 1.18 in)

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< REMOVAL AND INSTALLATION >

LOWER LINK

LOWER LINK

Exploded View

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Removal and Installation

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REMOVAL

1.

Remove tires with power tool. Refer to

WT-64, "Removal and Installation"

.

2.

Remove brake hose bracket from steering knuckle. Refer to

BR-23, "FRONT : Removal and Installation"

.

3.

Remove caliper assembly mounting bolts. Hang caliper assembly in a place where it will not interfere with
work. Refer to

BR-37, "BRAKE CALIPER ASSEMBLY : Removal and Installation"

.

CAUTION:

Never depress brake pedal while brake caliper is removed.

4.

Remove disc rotor. Refer to

FAX-8, "Removal and Installation"

(2WD),

FAX-18, "Removal and Installation"

(4WD).

5.

Remove wheel sensor and harness connector. Refer to

BRC-134, "FRONT WHEEL SENSOR : Removal

and Installation"

.

CAUTION:

Never pull on wheel sensor harness.

6.

Remove steering outer socket from steering knuckle. Refer to

ST-42, "Removal and Installation"

.

7.

Remove height sensor from upper link (right side). Refer to

EXL-136, "Removal and Installation"

.

8.

Set suitable jack under lower link.

9.

Remove stabilizer connecting rod from lower link. (Without HBMC) Refer to

FSU-20, "Removal and Instal-

lation"

.

10. Remove shock absorber mounting bolt from lower link.
11. Separate upper link from steering knuckle. Refer to

FSU-17, "Removal and Installation"

.

1.

Upper link

2.

Eccentric disc

3.

Lower link

4.

Bump rubber

5.

Adjusting bolt

Refer to

GI-4, "Components"

for symbols in the figure.

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LOWER LINK

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< REMOVAL AND INSTALLATION >

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12. Separate drive shaft from steering knuckle. (4WD) Refer to

FAX-22, "Removal and Installation"

.

13. Remove lower link from steering knuckle. Refer to

FAX-8, "Removal and Installation"

(2WD),

FAX-18,

"Removal and Installation"

(4WD).

14. Remove protector A. (With HBMC) Refer to

SCS-32, "FRONT TUBE ASSEMBLY : Removal and Installa-

tion"

.

15. Remove bracket. (With HBMC) Refer to

SCS-32, "FRONT TUBE ASSEMBLY : Removal and Installation"

.

16. Remove adjusting bolts, nuts, eccentric discs, stopper rubber, and lower link from vehicle.

17. Remove bump rubber from lower link.

18. Perform inspection after removal. Refer to

FSU-15, "Inspection"

.

INSTALLATION

Note the following, and install in the reverse order of removal.
• Protrusion (A) of bumper rubber (1) shall be installed securely to

hole of lower link (2).

• Never tap on the ball joint cap of the stabilizer connecting rod with

a hammer or a similar item when inserting the stabilizer connecting
rod into the lower link. (Without HBMC)

• Perform final tightening of bolts and nuts at the front suspension

member installation and shock absorber lower side (rubber bush-
ing), under unladen conditions with tires on level ground.

• Perform inspection after installation. Refer to

FSU-15, "Inspection"

.

Inspection

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INSPECTION AFTER REMOVAL

Appearance

Check the following items, and replace the part if necessary.
• Lower link and bushing for deformation, cracks or damage.
• Ball joint boot for cracks or other damage, and also for grease leakage.

Ball Joint Inspection

Manually move ball stud to confirm it moves smoothly with no binding.

Swing Torque Inspection

1.

Move the ball joint at least ten times by hand to check for smooth movement.

2.

Hook a spring balance (A) at groove. Confirm spring balance
measurement value is within specifications when ball stud
begins moving.

• If swing torque exceeds standard range, replace lower link assem-

bly.

Rotating Torque Inspection

1.

Move the ball joint at least ten times by hand to check for smooth movement.

2.

Check that rotating torque is within specifications.

• If rotating torque exceeds standard range, replace lower link assembly.

Axial End Play Inspection

1.

Move the ball joint at least ten times by hand to check for smooth movement.

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Swing toque

: Refer to

FSU-21, "Ball Joint"

.

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Rotating toque

: Refer to

FSU-21, "Ball Joint"

.