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
TUBE ASSEMBLY, PPMU PIPE : Exploded View"
.
JSEIA0188ZZ
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