Infiniti QX56 (Z62). Manual - part 1096

CHECK INTERNAL LEAKAGE

SCS-21

< BASIC INSPECTION >

[HBMC]

C

D

F

G

H

I

J

K

L

M

A

B

SCS

N

O

P

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

lower pressure.

CAUTION:

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

18. Check that reading of oil pressure gauge is 0 MPa.

19. Remove oil pressure gauge.

: 20 N·m (2.0 kg-m, 15 ft-lb)

JSEIA0188ZZ

SCS-22

< BASIC INSPECTION >

[HBMC]

CHECK FOR MALFUNCTION

CHECK FOR MALFUNCTION

Work Procedure

INFOID:0000000006256013

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.

Remove protector of PPMU.

2.

Remove cap of oil injection jack.

3.

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.

4.

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

CAUTION:

Never loosen the needle valve more than required.

5.

Lift up the vehicle.

CAUTION:

Check that tires never contact the ground.

6.

Tighten needle valves A and C of PPMU.

7.

Loosen lock nuts of needle valves B and D of PPMU and then
tighten needle valves B and D.

8.

Write down a value of the oil pressure gauge.

9.

Lift down the vehicle.

CAUTION:

Check that the lift is fully lowered.

10. Read a value of oil pressure gauge.

11. Compare difference of reading with pressure reading in step 8.

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

13. Loosen needle valves B and D of PPMU by approximately 2 rotations and then tighten lock nut to the

specified torque.

CAUTION:

Never loosen the needle valve more than required.

JSEIA0186ZZ

Pressure change

Pressure increases

: PPMU malfunction

Pressure does not change

: Shock absorber malfunction

Tightening torque

: 8.3 N·m (0.85 kg-m, 73 in-lb)

Tightening torque

: 20 N·m (2.0 kg-m, 15 ft-lb)

JSEIA0187ZZ

CHECK FOR MALFUNCTION

SCS-23

< BASIC INSPECTION >

[HBMC]

C

D

F

G

H

I

J

K

L

M

A

B

SCS

N

O

P

14. 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).

15. Check that reading of oil pressure gauge is 0 MPa.
16. Remove oil pressure gauge.

JSEIA0188ZZ

SCS-24

< BASIC INSPECTION >

[HBMC]

CHECK SHOCK ABSORBER FOR MALFUNCTION

CHECK SHOCK ABSORBER FOR MALFUNCTION

Work Procedure

INFOID:0000000006256014

CAUTION:

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

be mud on it.

• Clean suspension oil pump (special service tool: KV40107700) jack with steam before use.
• Clean leak check plug (special service tool: KV40108400) jack with steam before use.
• Check each shock absorber, one by one, in accordance with the following procedures.

1.

Lift up the vehicle.

2.

Remove protector of PPMU.

3.

Remove cap of oil injection jack.

4.

Install hose (A) of a suspension oil pump (SST: KV40107700) to
oil injection jack. 

CAUTION:

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

heard.

• Pressure reducing valve (B) of the suspension oil pump

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.

Set knob (A) of suspension oil pump to the direction as shown in
the figure and check that reading of pressure gauge is 0 MPa.

7.

Tighten needle valves A, C, and E of PPMU.

8.

Disconnect upper side pipe or lower side pipe of each shock absorber.
• For front shock absorber

JSEIA0244ZZ

JSEIA0187ZZ

JSEIA0193ZZ