2008 INFINITI QX56 power steering

POWER STEERING OIL PUMPST-17
< ON-VEHICLE REPAIR >
C
DE
F
H I
J
K L
M A
B
ST
N
O P
POWER STEERING OIL PUMP
On-Vehicle Inspection and ServiceINFOID:0000000004920097
CHECKING RELIEF OIL PRESSURE
CAUTION:
Before starting work, confirm belt tension is proper.
1. Connect Tool between oil pump discharge connector and high pressure hose and then bleed air from the hydraulic circuit.
2. Start engine. Allow engine to run until tank temperature reaches 50 ° – 80 °C (122° – 176°F).
CAUTION:
• Warm up engine with shut-off valve fully opened. If engine is started with shut-off valve closed,
fluid pressure in power steering pump increases to maximum. This will raise fluid temperature
excessively.
• Be careful not to contact hose with belt when engine is started.
3. With engine at idle, close shut-off valve and read the relief oil pressure.
CAUTION:
Do not close shut-off valve of pressure gauge for more than 10 seconds.
4. After measurement, open shut-off valve slowly. • If relief oil pressure is outside the specification, repair or replace oil pump. Refer to ST-35, "
Disassembly
and Assembly" .
5. After inspection, disconnect oil pressure gauge and oil pressure gauge adapter from hydraulic circuit, con-
nect oil pump discharge connector and high pressure hose. Add fluid and bleed air from hydraulic circuit
thoroughly. Refer to ST-13, "
Air Bleeding Hydraulic System" .
Tool number:
Pressure gauge and shut-off valve KV48103500
(J26357 and J26357-10)
Oil pump side Connector A and O-
ring
KV48105300-4 and 5295262U10
(—)
Eye-bolt and O-ring KV48105300-3 and 5295262U00
(—)
High pressure
piping side Connector B and O-
ring
KV48105300-1 and 5295262U00
(—)
Nut KV48105300-2
( — )
SGIA0570E
Relief oil pressure
: 9.0 – 9.8 mPa (91.77 – 99.93 kg/cm2 , 1305.34 – 1421.37 psi)
Revision: March 2010 2008 QX56

POWER STEERING GEAR AND LINKAGEST-23
< REMOVAL AND INSTALLATION >
C
DE
F
H I
J
K L
M A
B
ST
N
O P
POWER STEERING GEAR AND LINKAGE
Removal and InstallationINFOID:0000000004920101
CAUTION:
Spiral cable may snap due to steering operation if steering column is separated from steering gear
assembly. Therefore secure steer ing wheel to avoid turning.
REMOVAL
1. Turn wheels to the straight-ahead position.
2. Remove tires from vehicle using power tool.
3. Remove undercover using power tool.
4. On 4WD models, remove front final drive, then support drive shafts with wire. Refer to DLN-212,
"Removal and Installation".
5. Make sure slit of lower joint fits with the projection on rear cover cap, while checking that mark on steering gear assembly aligns
with mark on rear cover cap.
6. Remove cotter pin at steering outer socket and discard, then loosen nut.
1. Cotter pin 2. Mounting bracket 3. Mounting insulator
4. Steering gear assembly 5. Washer
WGIA0127E
SST491C
Revision: March 2010 2008 QX56

ST-24
< REMOVAL AND INSTALLATION >
POWER STEERING GEAR AND LINKAGE
7. Remove steering outer socket from steering knuckle using Tool.Be careful not to damage ball joint boot.
CAUTION:
Temporarily tighten nut to prevent damage to threads and
to prevent Tool from coming off.
8. On 2WD models, remove stabilizer bolts then reposition stabilizer bar. Refer to FSU-16, "
Removal and
Installation".
9. Remove oil piping (high pressure side and low pressure side) from steering gear assembly, then drain fluid from piping.
10. Remove lower joint bolt of lower joint shaft.
11. Remove nuts of steering gear assembly using power tool, then remove bolts and steering gear assembly.
INSTALLATION
Installation is in the reverse order of removal.
• After removing/installing or replacing steering components, check wheel alignment. Refer to FSU-7, "
Front
Wheel Alignment".
• After adjusting wheel alignment, adjust neutral position of steering angle sensor. Refer to BRC-8, "
ADJUST-
MENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Special Repair Requirement".
Tool number : HT72520000 (J-25730-A)
WGIA0130E
LGIA0032E
LGIA0029E
LGIA0024E
Revision: March 2010
2008 QX56

POWER STEERING GEAR AND LINKAGEST-25
< REMOVAL AND INSTALLATION >
C
DE
F
H I
J
K L
M A
B
ST
N
O P
• With steering wheel in straight ahead position, make sure slit of lower joint "A" fits with the projection on rear cover cap "B", while
checking that mark on steering gear assembly aligns with mark on
rear cover cap
• After installation, bleed the air from the steering hydraulic system. Refer to ST-13, "
Air Bleeding Hydraulic
System".
INSPECTION AFTER INSTALLATION
Check if steering wheel turns smoothly when it is turned several times fully to the left and right lock positions.
SST491C
Revision: March 2010 2008 QX56

ST-26
< REMOVAL AND INSTALLATION >
POWER STEERING OIL PUMP
POWER STEERING OIL PUMP
Removal and InstallationINFOID:0000000004920102
REMOVAL
1. Drain power steering fluid from reservoir tank.
2. Remove engine room cover. Refer to EM-24, "
Removal and Installation".
3. Remove air duct assembly. Refer to EM-25, "
Removal and Installation".
4. Remove power steering reservoir tank.
5. Remove serpentine drive belt belt from auto tensioner and power steering pump. Refer to EM-13,
"Removal and Installation".
6. Disconnect pressure sensor electrical connector.
7. Remove high pressure and low pressure piping from power steering oil pump. Refer to ST-27
.
8. Remove bolts, then remove power steering pump.
INSTALLATION
Installation is in the reverse order of removal. Refer to ST-27 for tightening torque.
• After installation, bleed air. Refer to ST-13, "
Air Bleeding Hydraulic System".
NOTE:
Belt tension is automatic and requires no adjustment.
Revision: March 2010 2008 QX56

ST-28
< REMOVAL AND INSTALLATION >
HYDRAULIC LINE
• Confirm mating marks are aligned with hose and clamp, then cor-rect if needed.
• To install eye joint, align projection of eye joint with notch of power steering pump, and attach eye joint to power steering pump prop-
erly. Tighten eye bolt by hand fully, then torque to specification.
SGIA0563E
WGIA0089E
Revision: March 2010 2008 QX56

POWER STEERING GEAR AND LINKAGEST-31
< DISASSEMBLY AND ASSEMBLY >
C
DE
F
H I
J
K L
M A
B
ST
N
O P
POWER STEERING GEAR AND LINKAGE
Disassembly and AssemblyINFOID:0000000004920105
CAUTION:
• Secure steering gear assembly with a vise, using copper plates or something similar to prevent it
from being damaged. Do not grip cylinder with a vise.
• Before performing disassembly, clean steering gear assembly with kerosene. Be careful not to bring
any kerosene into contact with the di scharge and return port connectors.
DISASSEMBLY
1. Remove cylinder tubes from gear housing assembly.
2. Loosen lock nuts of outer sockets, and remove outer sockets.
3. Remove boot clamps of the small diameter si de and the large diameter side, then remove boot.
CAUTION:
When removing boots, be careful not to damage inner socket and gear housing assembly. If they
are damaged, change th em to avoid oil leaks.
4. Remove inner sockets.
INSPECTION AFTER DISASSEMBLY
Boot
Check boot for tears, cracks and deformation. Replace if necessary.
1. Boot clamp 2. Inner socket3. Boot
4. Boot clamp 5. Outer socket6. Cylinder tubes
7. Gear housing assembly 8. Connector
AWGIA0087GB
Revision: March 2010 2008 QX56

ST-32
< DISASSEMBLY AND ASSEMBLY >
POWER STEERING GEAR AND LINKAGE
Gear Housing Assembly
Check gear housing assembly for dents, cracks or damage. Replace as an assembly if necessary.
Outer Socket and Inner Socket
SWING TORQUE• Measure the swing torque, using suitable Tool. When ball stud and
inner socket start moving the measured value must be within the
specification. If the reading is out side the specification, replace the
socket.
ROTATING TORQUE• Measure the rotating torque, using Tool. If the value is outside the
specification, replace the outer sockets.
AXIAL END PLAY• Apply a load of 490 N (50 kg-f, 110 lb-f) to the ball stud axially. Usea dial gauge to measure the amount of the movement that the stud
makes. If the value is outside the specification, replace the sock-
ets.
ASSEMBLY
1. Install the inner sockets. Tool number : — (J-44372)
WGIA0131E
Item
Outer socket Inner socket
Measuring point Cotter pin hole of stud Shown as L: 83.2 mm (3.276 in)
Swing torque 0.3 − 2.9 N·m (0.03 − 0.29 kg-m, 3 − 25 in-lb) 1.0 − 7.8 N·m (0.11 − 0.79 kg-m, 9 − 69 in-lb)
Measuring value (F) 4.84 − 46.7 N (0.50 − 4.7 kg-f, 4 - 34 lb-f) 12.1 − 93.7 N (1.3 − 9.5 kg-f, 9 − 69 lb-f)
Tool number : ST3127S000 (J-25765-A)
Rotating torque : 0.3 − 2.9 N·m (0.03 − 0.29 kg-m,
3 − 25 in-lb)
WGIA0132E
Outer socket : 0.5 mm (0.020 in) or less
Inner socket : 0.2 mm (0.008 in) or less
SGIA0057E
Revision: March 2010 2008 QX56