2011 INFINITI QX56 suspension

SCS-34
< REMOVAL AND INSTALLATION >[HBMC]
HYDRAULIC BODY-MOTION CONTROL SYSTEM
3. Disconnect pipe (A) of accumulator assembly RH from right side
3-way (B).
4. Disconnect lower side pipe (B) of front shock absorber RH.
5. Remove protector A with power tool.
6. Remove mounting bolts of right side 3-way.
7. Remove protector B with power tool.
8. Remove mounting bolts of each bracket.
9. Remove front tube assembly B from the vehicle.
10. Perform inspection after removal. Refer to SCS-34, "
FRONT
TUBE ASSEMBLY : Inspection".
INSTALLATION
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.
 Completely insert guide (A) to guide hole on frame when installing
left side 3-way.
 For tightening torque for pipe of accumulator assembly LH, refer to SCS-35, "
ACCUMULATOR : Exploded View".
 For tightening torque for pipe of accumulator assembly RH, refer to
SCS-35, "
ACCUMULATOR : Exploded View".
FRONT TUBE ASSEMBLY : InspectionINFOID:0000000006256023
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, cont act with other parts, and loose connections.
ADJUSTMENT AFTER INSTALLATION
Perform air bleeding. Refer to SCS-18, "Work Procedure".
ACCUMULATOR
JSEIA0197ZZ
A : Upper side pipe
JSEIA0234ZZ
JSEIA0198ZZ
Revision: 2010 May2011 QX56

HYDRAULIC BODY-MOTION CONTROL SYSTEMSCS-35
< REMOVAL AND INSTALLATION > [HBMC]
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ACCUMULATOR : Exploded ViewINFOID:0000000006256024
ACCUMULATOR : Removal and InstallationINFOID:0000000006256025
REMOVAL
Accumulator Assembly LH
WARNING:
1. O-ring 2. Accumulator assembly RH 3. Accumulator assembly LH :Vehicle front
:Apply genuine NISSAN hydraulic
suspension fluid
Refer to GI-4, "
Components" for symbols not described on the above.
JSEIA0230GB
Revision: 2010 May2011 QX56

HYDRAULIC BODY-MOTION CONTROL SYSTEMSCS-37
< REMOVAL AND INSTALLATION > [HBMC]
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Never remove mounting bolts of protector.
1. Reduce system pressure. Refer to SCS-17, "
Work Procedure".
2. Disconnect pipe (A) of accumulator assembly RH from right side 3-way (B).
3. Remove pipe (A) of accumulator assembly RH from right side middle joint (B).
4. Separate chassis and body. Refer to DLK-251, "
Removal and
Installation".
5. Remove mounting bolts of each bracket.
6. Remove mounting bolts of accumulator assembly RH. WARNING:
Never remove mounting bolts of protector.
7. Remove accumulator assembly RH from the vehicle.
8. Perform inspection after removal. Refer to SCS-38, "
ACCUMU-
LATOR : Inspection".
INSTALLATION
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.
JSEIA0200GB
JSEIA0197ZZ
JSEIA0201ZZ
JSEIA0200GB
Revision: 2010 May2011 QX56

HYDRAULIC BODY-MOTION CONTROL SYSTEMSCS-39
< REMOVAL AND INSTALLATION > [HBMC]
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PPMU, MIDDLE TUBE ASSEMBLY, PPMU PIPE : Exploded ViewINFOID:0000000006256028
PPMU, MIDDLE TUBE ASSEMBLY, PPMU PIPE : Removal and Installation
INFOID:0000000006256029
REMOVAL
PPMU
1. PPMU pipe B 2. Cap 3. Middle tube assembly RH
4. O-ring 5. Bleeder valve 6. Middle tube assembly LH
7. PPMU 8. Cap 9. Protector
10. PPMU pipe A
A. To rear shock absorber RH B. To rear shock absorber LH
:Vehicle front
:Apply genuine NISSAN hydraulic
suspension fluid
Refer to GI-4, "
Components" for symbols not described on the above.
JSEIA0231GB
Revision: 2010 May2011 QX56

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 (fro m 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.
JSEIA0211ZZ
JSEIA0215ZZ
JSEIA0215ZZ
Revision: 2010 May2011 QX56

SCS-44
< REMOVAL AND INSTALLATION >[HBMC]
HYDRAULIC BODY-MOTION CONTROL SYSTEM
REAR TUBE ASSEMBLY : Exploded View
INFOID:0000000006256032
REAR TUBE ASSEMBLY : Removal and InstallationINFOID:0000000006256033
REMOVAL
Rear Tube Assembly A (from Rear Shock Abso rber 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.
JSEIA0247GB
Revision: 2010 May2011 QX56

SCS-46
< REMOVAL AND INSTALLATION >[HBMC]
HYDRAULIC BODY-MOTION CONTROL SYSTEM
3. Remove lower side pipe (A) of rear shock absorber RH.
4. Remove pipe (A) from left side rear joint (B).
5. Remove mounting bolts of bracket of rear tube assembly B.
6. Remove mounting bolts of bracket of rear left brake hose, and
then free hose.
7. Remove rear tube assembly B from the vehicle.
8. Perform inspection after removal. Refer to SCS-46, "
REAR
TUBE ASSEMBLY : Inspection".
INSTALLATION
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.
REAR TUBE ASSEMBLY : InspectionINFOID:0000000006256034
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".
JSEIA0212ZZ
JSEIA0204ZZ
Revision: 2010 May2011 QX56

DESCRIPTIONSCS-49
< SYSTEM DESCRIPTION > [AIR LEVELIZER CONTROL SYSTEM]
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SYSTEM DESCRIPTION
DESCRIPTION
DescriptionINFOID:0000000006256039
 Corrects sinkage of vehicle rear that occurs in laden or towing conditions.
 Maintains vehicle height at a constant level and improv es riding comfort by charging or discharging air in air
chamber of rear shock absorber, according to signal from vehicle height sensor installed to rear suspension.
Revision: 2010 May2011 QX56