2007 INFINITI QX56 service

PS-12
< SERVICE INFORMATION >
STEERING COLUMN
• When installing the steering column, finger-tighten all of the lower bracket and joint retaining bolts;
then tighten them to specification. Do not apply undue stress to the steering column.
• The lower nut on the upper joint may not be reused.
NOTE:
Align slit of the coupling joint with projection on dust cover. Insert the
joint until surface "A" contacts surface "B".
• After installation, turn steering wheel to make sure it moves
smoothly. Make sure the number of turns are the same from the
straight-forward position to left and right locks. Make sure that the
steering wheel is in a neutral position when driving straight ahead.
• When installing steering column to steering member, install mount-
ing nut from front side of vehicle.
INSPECTION AFTER INSTALLATION
• After installing steering column to vehicle, check tilt device operation range is within specification.
• Check if steering wheel operation can turn to the end of the left and
right stops smoothly.
SST491C
Range "A" : 61.3 mm (2.41 in)
WGIA0083E

STEERING COLUMN
PS-13
< SERVICE INFORMATION >
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Disassembly and AssemblyINFOID:0000000003532828
DISASSEMBLY
1. Remove mounting bolt from upper joint, then remove upper joint from steering column assembly.
2. Remove ignition switch tamper resistant self-shear screws with a drill or other suitable tool.
ASSEMBLY
Assembly is in the reverse order of disassembly.
• Install new tamper resistant self-shear screws.
NOTE:
Any time the ignition switch has been removed and installed, the
keys must be re-registered in the BCM. Refer to CONSULT-II opera-
tion manual IVIS/NVIS.
INSPECTION AFTER ASSEMBLY
When the steering wheel does not turn smoothly, check the steering column as follows:
1. Check the column bearings for damage or unevenness. Lubricate with recommended multi-purpose
grease. Replace the steering column as an assembly, if necessary.
2. Check the column tube for deformation or breakage. Replace the steering column as an assembly, if nec-
essary.
1. Steering column assembly 2. Upper joint 3. Ignition switch
4. Tamper resistant self-shear screw
WGIA0091E
WGIA0009E

PS-14
< SERVICE INFORMATION >
STEERING COLUMN
3. If the vehicle has been involved in a collision, or if noise and rat-
tles are heard during a turn, check the length "L" of the column.
If out of specification, replace the steering column as an assem-
bly.
4. Check for proper lubrication, apply grease as necessary.
5. Check for wear around the seal edges, replace the steering col-
umn as an assembly as necessary.
6. Check for corrosion or pitting around the seal sliding area.Steering column length "L" : 610 mm (24.02 in)
WGIA0080E

POWER STEERING GEAR AND LINKAGE
PS-15
< SERVICE INFORMATION >
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POWER STEERING GEAR AND LINKAGE
Removal and InstallationINFOID:0000000003532829
CAUTION:
Spiral cable may snap due to steering operation if steering column is separated from steering gear
assembly. Therefore secure steering 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 model, remove front final drive, then support drive shafts with wire. Refer to FFD-12, "
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

PS-16
< SERVICE INFORMATION >
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 mounting nut to prevent damage to
threads and to prevent Tool from coming off.
8. On 2WD model, remove stabilizer bar mounting bolts and reposition stabilizer bar. Refer to FSU-12,
"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 mounting 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-6, "
Front
Wheel Alignment" .
• After adjusting wheel alignment, adjust neutral position of steering angle sensor. Refer to BRC-54, "
Adjust-
ment of Steering Angle Sensor Neutral Position" . Tool number : HT72520000 (J-25730-A)
SDIA1434E
LGIA0032E
LGIA0029E
LGIA0024E

POWER STEERING GEAR AND LINKAGE
PS-17
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• With steering wheel in straight ahead position, 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
• After installation, bleed the air from the steering hydraulic system. Refer to PS-6, "
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.
Disassembly and AssemblyINFOID:0000000003532830
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.
SST491C
1. Boot clamp 2. Inner socket 3. Boot
4. Boot clamp 5. Outer socket 6. Cylinder tubes
7. Gear housing assembly 8. Connector
WGIA0128E

PS-18
< SERVICE INFORMATION >
POWER STEERING GEAR AND LINKAGE
• Before performing disassembly, clean steering gear assembly with kerosene. Be careful not to bring
any kerosene into contact with the discharge 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 side 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 them to avoid oil leaks.
4. Remove inner sockets.
INSPECTION AFTER DISASSEMBLY
Boot
Check boot for tears, cracks and deformation. Replace if necessary.
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 Tool. When ball stud and inner
socket start moving the measured value must be within the specifi-
cation. If the reading is outside 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
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, 9 − 69 lb)
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

POWER STEERING GEAR AND LINKAGE
PS-19
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• Apply a load of 490 N (50 kg-f, 110 lb-f) to the ball stud axially. Use
a 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.
2. Install the large-diameter side of the boots to the gear housing
assembly.
3. Install the small-diameter side of the boots to the groove of the
inner sockets.
4. Install the boot clamps to the boots, as shown.
CAUTION:
Do not reuse the large-diameter boot clamps.Outer socket : 0.5 mm (0.020 in) or less
Inner socket : 0.2 mm (0.008 in) or less
SGIA0057E
SGIA0550E
AST139