Infiniti QX56 (Z62). Manual - part 1101

HYDRAULIC BODY-MOTION CONTROL SYSTEM

SCS-41

< REMOVAL AND INSTALLATION >

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Middle Tube Assembly RH (from Rear Shock Absorber RH Upper to Right Side Middle Joint)

1.

Reduce system pressure. Refer to 

SCS-17, "Work Procedure"

.

2.

Disconnect upper side pipe (A) of rear shock absorber RH.

3.

Disconnect pipe (A) of rear tube assembly A from right side rear
joint (B).

4.

Remove pipe (A) of accumulator assembly RH from right side
middle joint (B).

5.

Disconnect PPMU pipe B (A) from right side middle joint (B).

6.

Separate chassis and body. Refer to 

DLK-251, "Removal and

Installation"

.

7.

Remove mounting bolts of each bracket.

8.

Remove middle tube assembly RH from the vehicle.

9.

Perform inspection after removal. Refer to 

SCS-43, "PPMU,

MIDDLE TUBE ASSEMBLY, PPMU PIPE : Inspection"

.

PPMU pipe A and PPMU pipe B 

1.

Reduce system pressure. Refer to 

SCS-17, "Work Procedure"

.

2.

Remove PPMU pipe A from left side middle joint.

3.

Remove PPMU pipe B from right side middle joint.

4.

Separate chassis and body. Refer to 

DLK-251, "Removal and Installation"

.

5.

Remove PPMU pipe B from the vehicle.

6.

Perform inspection after removal. Refer to 

SCS-43, "PPMU, MIDDLE TUBE ASSEMBLY, PPMU PIPE :

Inspection"

.

B

: Lower side pipe

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SCS-42

< REMOVAL AND INSTALLATION >

[HBMC]

HYDRAULIC BODY-MOTION CONTROL SYSTEM

INSTALLATION

PPMU

Note the following, and install in the reverse order of removal.
• Check connection portion of each piping for dirt or dust.
• Completely engage hooks of bracket on frame when installing

PPMU.

Middle Tube Assembly LH (from Rear Shock Absorber LH Upper to Left Side Middle Joint)

Note the following, and install in the reverse order of removal.
• Apply genuine NISSAN hydraulic suspension fluid to O-ring.
• Check connection portion of each piping for dirt or dust.
• For tightening torque for pipe of rear tube assembly B, refer to 

SCS-44, "REAR TUBE ASSEMBLY :

Exploded View"

.

• For tightening torque for pipe of accumulator assembly LH, refer to 

SCS-35, "ACCUMULATOR : Exploded

View"

.

• Completely insert guide (A) to guide hole on frame when installing

left side middle joint.

Middle Tube Assembly RH (from Rear Shock Absorber RH Upper to Right Side Middle Joint)

• O-ring must be free of scratches and damage.
• Apply genuine NISSAN hydraulic suspension fluid to O-ring.
• Check connection portion of each piping for dirt or dust.
• For tightening torque for pipe of rear tube assembly A refer to 

SCS-44, "REAR TUBE ASSEMBLY :

Exploded View"

.

• For tightening torque for pipe of accumulator assembly RH, refer to 

SCS-35, "ACCUMULATOR : Exploded

View"

.

• Completely insert guide (A) to guide hole on frame when installing

right side middle joint.

PPMU pipe A and PPMU pipe B

Install in the reverse order of removal.

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HYDRAULIC BODY-MOTION CONTROL SYSTEM

SCS-43

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PPMU, MIDDLE TUBE ASSEMBLY, PPMU PIPE : Inspection

INFOID:0000000006256030

INSPECTION AFTER REMOVAL

• O-ring must be free of scratches and damage.
• Pipe and tube must be free of scratches and damage.

INSPECTION AFTER INSTALLATION

Check oil leakage, twists, deformation, contact with other parts, and loose connections.

ADJUSTMENT AFTER INSTALLATION

Perform air bleeding. Refer to 

SCS-18, "Work Procedure"

.

PPMU, MIDDLE TUBE ASSEMBLY, PPMU PIPE : Disposal

INFOID:0000000006256031

CAUTION:

• Always wear safety goggles.
• Always wear safety gloves.
• Be careful since pressure is higher when temperature is high.
• Be careful since metal shavings or oil may be blown away by compressed gas.
• Discard drained oil in accordance with local laws and regulations.

WORK PROCEDURE

1.

Remove both tanks using an oil filter wrench.

2.

Secure tank using a vise.

3.

Drill a hole as shown in the figure (

z

) using an electric drill.

Drain gas and oil.
NOTE:
• Gas is colorless, odorless, and harmless.
• Use an electric drill with a drill bit of approximately 4 mm (0.16

in).

• Drilling a hole is easier when electric drill speed is slow.

REAR TUBE ASSEMBLY

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SCS-44

< REMOVAL AND INSTALLATION >

[HBMC]

HYDRAULIC BODY-MOTION CONTROL SYSTEM

REAR TUBE ASSEMBLY : Exploded View

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REAR TUBE ASSEMBLY : Removal and Installation

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REMOVAL

Rear Tube Assembly A (from Rear Shock Absorber LH Lower to Right Side Rear Joint)

1.

Reduce system pressure. Refer to 

SCS-17, "Work Procedure"

.

2.

Remove rear muffler. Refer to 

EX-5, "Removal and Installation"

.

1.

Rear tube assembly A

2.

O-ring

3.

Rear tube assembly B

: Vehicle front

:

Apply genuine NISSAN hydraulic 
suspension fluid

Refer to 

GI-4, "Components"

 for symbols not described on the above.

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