2011 INFINITI QX56 check oil

SCS-6
< PREPARATION >[HBMC]
PREPARATION
PREPARATION
PREPARATION
Special Service ToolsINFOID:0000000006255997
The actual shapes of Kent-Moore tool
s may differ from those of special service tools illustrated here.
Commercial Service ToolsINFOID:0000000006414888
Tool number
(Kent-Moore No.)
Tool name Description
KV40107700
(—)
Suspension oil pump  Air bleeding
 System diagnosis
KV40108000
(—)
Oil pressure gauge System pressure check
KV40108400
(—)
Leak check plug Shock absorber leakage check
JSEIA0183ZZ
JSEIA0184ZZ
JSEIA0185ZZ
Tool name
Description
Power tool Loosening bolts and nuts
PBIC0190E
Revision: 2010 May2011 QX56

CHECK SYSTEM PRESSURESCS-15
< BASIC INSPECTION > [HBMC]
C
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B
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BASIC INSPECTION
CHECK SYSTEM PRESSURE
Work ProcedureINFOID:0000000006256009
CAUTION:
 Clean surrounding areas of oil inj ection 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
Revision: 2010 May2011 QX56

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
Revision: 2010 May2011 QX56

PRESSURE REDUCING METHODSCS-17
< BASIC INSPECTION > [HBMC]
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G H
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B
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PRESSURE REDUCING METHOD
Work ProcedureINFOID:0000000006256010
CAUTION:
 Clean surrounding areas of oil inj ection 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 beheard.
 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. Loosen pressure reducing valve (A) of oil pressure gauge and then lower pressure.
CAUTION:
Be careful since oil drains sw iftly from oil drain hole (B).
7. Check that reading of oil pressure gauge is 0 MPa.
8. 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)
JSEIA0188ZZ
Revision: 2010 May2011 QX56

SCS-18
< BASIC INSPECTION >[HBMC]
AIR BLEEDING METHOD
AIR BLEEDING METHOD
Work ProcedureINFOID:0000000006256011
WARNING:
 Always check the piping for loose co
nnections, damage, or twists before starting operation, since
pressure in hydraulic circuit b ecomes high during operation.
 When repairing or replacing a malfunctioning pa rt, always release pressure from hydraulic circuit,
since dangerous conditions may be created when oil leakage occurs during air bleeding operation.
CAUTION:
 Clean surrounding areas of oil injection jack and air bleeder using steam before starting operation,
since there may be mud on it.
 Clean suspension oil pump (special servi ce tool: KV40107700) jack with steam before use.
 Check system pressure again 1 day or more after bleeding operation is complete, since system pres-
sure may decrease when air bleeding is insufficient.
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.
5. Loosen pressure reducing valve (A) of hose portion of suspen- sion oil pump.
6. Set knob (A) of suspension oil pump to the direction as shown in the figure.
7. Close pressure reducing valve of hose portion of suspension oil pump while sending oil by applying pressure using suspension
oil pump. (Air bleeding in hose is complete.)
JSEIA0189ZZ
JSEIA0190ZZ
JSEIA0191ZZ
Revision: 2010 May2011 QX56

AIR BLEEDING METHODSCS-19
< BASIC INSPECTION > [HBMC]
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8. Loosen needle valves A, C, and E of PPMU by approximately 2 rotations.
CAUTION:
Never loosen the needle valve more than required.
9. Install bleeder tube and drain tank to bleeder valve in upper side of rear shock absorber RH.
10. Loosen bleeder valve and bleed air while sending oil by applying pressure using suspension oil pump, and then quickly tighten air
bleeder.
CAUTION:
Be careful that oil in suspensi on oil pump is not at half or
less.
11. Repeat step 10 until no air appears in bleeder tube.
12. Tighten bleeder valve to the specified torque. Refer to SCS-32, "
FRONT TUBE ASSEMBLY : Exploded
View" (front shock absorber), SCS-39, "PPMU, MIDDLE TUBE ASSEMB LY, PPMU PIPE : Exploded
View" (upper side of rear shock absorber).
13. Perform operation according to steps 9 to 12 in the order of rear shock absorber RH (lower side) → front
shock absorber RH (upper side and lower side) → rear shock absorber LH (upper side and lower side) →
front shock absorber LH (upper side and lower side).
14. Repeat steps 9 to 13 (2nd turn).
15. Refer to the figure and send oil by applying pressure.
16. Tighten needle valves A, C, and E of PPMU to the specified torque.
17. 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.
18. Remove hose of suspension oil pump.
19. Install cap of oil injection jack.
20. Install protector of PPMU. Refer to SCS-39, "
PPMU, MIDDLE
TUBE ASSEMBLY, PPMU PIPE : Exploded View".
Lower side of rear shock absorber
Tightening torque : 8.3 N·m (0.85 kg-m, 73 in-lb)
JSEIA0187ZZ
JSEIA0236GB
Tightening torque : 8.3 N·m (0.85 kg-m, 73 in-lb)
JSEIA0193ZZ
Revision: 2010 May2011 QX56

SCS-20
< BASIC INSPECTION >[HBMC]
CHECK INTERNAL LEAKAGE
CHECK INTERNAL LEAKAGE
Work ProcedureINFOID:0000000006256012
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 beheard.
 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 C and E of PPMU.
7. Loosen lock nut of needle valve D of PPMU and then tighten needle valve D.
8. Lift down the vehicle. CAUTION:
Check that the lift is fully lowered.
9. Write down a value of the oil pressure gauge after 5 minutes.
10. Tighten needle valve A of PPMU.
11. Loosen lock nut of needle valve B of PPMU and then tighten needle valve B.
12. Loosen needle valve C of PPMU by approximately 2 rotations. CAUTION:
Never loosen the needle valve more than required.
13. Read a value of oil pressure gauge.
14. Compare difference of reading with pressure reading in step 9.
15. Tighten needle valves A, C, and E of PPMU to the specified torque.
16. Loosen needle valves B and D of PPMU by approximatel y 2 rotations and then tighten lock nut to the
specified torque.
CAUTION:
Never loosen the needle valve more than required.
JSEIA0186ZZ
Pressure difference
0.1 MPa or more : Normal
0.1 MPa or less : Malfunction
: 8.3 N·m (0.85 kg-m, 73 in-lb)
JSEIA0187ZZ
Revision: 2010 May2011 QX56

CHECK INTERNAL LEAKAGESCS-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 sw iftly 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
Revision: 2010 May2011 QX56