Infiniti QX56 (Z62). Manual - part 1094

 

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Infiniti QX56 (Z62). Manual - part 1094

 

 

SYSTEM

SCS-13

< SYSTEM DESCRIPTION >

[HBMC]

C

D

F

G

H

I

J

K

L

M

A

B

SCS

N

O

P

During rough road driving (Front wheel LH: compressing, front wheel RH: extending, rear wheel LH: extending, rear
wheel RH: compressing)

Discharged oil from each shock absorber moves along piping path, but oil does not overflow from piping path,
since oil moves in between each shock absorber. Oil does not flow in accumulator and system pressure does
not increase.
Since the oil from the contracted shock absorber flows into the shock absorber upper chamber, stabilizer-like
action is not generated. This improves the adhesion level and the running performance on rough roads.

JSEIA0177GB

SCS-14

< SYSTEM DESCRIPTION >

[HBMC]

SYSTEM

Component Description

INFOID:0000000006256008

JSEIA0178GB

Component parts

Description

Needle valve A

Needle valve for oil filling or trouble diagnosis. It is usually closed.

Needle valve B

Needle valve for trouble diagnosis. It is usually open.

Needle valve C

Needle valve for oil filling or trouble diagnosis. It is usually closed.

Needle valve D

Needle valve for trouble diagnosis. It is usually open.

Needle valve E

Needle valve for oil filling or trouble diagnosis. It is usually closed.

Relief valve

If system pressure increases, then the orifice becomes clogged and oil flow into PPMU be-
comes disrupted, resulting in a large pressure difference between PPMU and both pipes. In 
this case, the relief valve opens to let the oil flow.

Oil injection jack

• Oil filling inlet
• For basic inspection use.

Air bleeder

For air bleeding use.

CHECK SYSTEM PRESSURE

SCS-15

< BASIC INSPECTION >

[HBMC]

C

D

F

G

H

I

J

K

L

M

A

B

SCS

N

O

P

BASIC INSPECTION

CHECK SYSTEM PRESSURE

Work Procedure

INFOID:0000000006256009

CAUTION:

• Clean surrounding areas of oil injection jack using steam before starting operation, since there may

be mud on it.

• Clean oil pressure gauge (special service tool: KV40108000) jack with steam before use.

1.

Lift up the vehicle.

2.

Remove protector of PPMU.

3.

Remove cap of oil injection jack.

4.

Install an oil pressure gauge (SST: KV40108000) (A) to oil injec-
tion jack. 

CAUTION:

• Jack must be securely inserted until a click sound can be

heard.

• Pressure reducing valve (B) of the oil pressure gauge

must be closed.

5.

Loosen needle valves A, C, and E of PPMU by approximately 2
rotations.

CAUTION:

Never loosen the needle valve more than required.

6.

Refer to the figure and check the specified pressure.

7.

Tighten needle valves A, C, and E of PPMU to the specified
torque.

JSEIA0186ZZ

JSEIA0187ZZ

Tightening torque

: 8.3 N·m (0.85 kg-m, 73 in-lb)

JSEIA0222GB

SCS-16

< BASIC INSPECTION >

[HBMC]

CHECK SYSTEM PRESSURE

8.

Loosen pressure reducing valve (A) of oil pressure gauge and
then lower pressure.

CAUTION:

Be careful since oil drains swiftly from oil drain hole (B).

9.

Check that reading of oil pressure gauge is 0 MPa.

10. Remove oil pressure gauge.

11. Install cap of oil injection jack.

12. Install protector of PPMU. Refer to 

SCS-39, "PPMU, MIDDLE

TUBE ASSEMBLY, PPMU PIPE : Exploded View"

.

JSEIA0188ZZ

 

 

 

 

 

 

 

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