2004 INFINITI QX56 steering

PS-12
STEERING COLUMN
Revision: August 20072004 QX56
CAUTION:

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
mounting nut from front side of vehicle.
INSPECTION AFTER INSTALLATION

After installing steering column to vehicle, check tilt device and its operation range is as specified.

Check if steering wheel operation can turn to the end of the left
and right stops smoothly.
SST 4 91 C
Range "A" : 61.3 mm (2.41 in)
WGIA0083E

STEERING COLUMN
PS-13
C
D
E
F
H
I
J
K
L
MA
B
PS
Revision: August 20072004 QX56
Disassembly and AssemblyEGS000ND
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.
1. Steering column assembly 2. Upper joint 3. Ignition switch
4. Tamper resistant self-shear screw
WGIA0091E

PS-14
STEERING COLUMN
Revision: August 20072004 QX56
ASSEMBLY

Assembly is in the reverse order of disassembly.

Install new tamper resistant self-shear screws.
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.
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.
7. After installing the steering column, check the tilt mechanism for
proper operation.
CAUTION:

Replace the column if it is depleted of grease, worn, dam-
aged, or if any scratches or coating separation is present
on the shaft seal area.

During lower joint detachment, insert a tool into the yoke
groove to prevent gouging damage.
WGIA0009E
Steering column length "L" : 610 mm (24.02 in)
WGIA0080E
Tilt mechanism range
(Manual tilt): 3° per notch at 5 stops
WGIA0026E

POWER STEERING GEAR AND LINKAGE
PS-15
C
D
E
F
H
I
J
K
L
MA
B
PS
Revision: August 20072004 QX56
POWER STEERING GEAR AND LINKAGEPFP:49001
Removal and InstallationEG S00 0M U
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 models, 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 mounting nut.
1. Cotter pin 2. Mounting bracket 3. Bushing
4. Washer 5. Steering gear assembly 6. Mounting insulator
WGIA0092E
SST 4 91 C

PS-16
POWER STEERING GEAR AND LINKAGE
Revision: August 20072004 QX56
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 models, remove stabilizer bar mounting bolts and reposition stabilizer bar. Refer to FSU-12,
"STABILIZER BAR" .
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 shaft.
11. Remove mounting bolts and nuts of steering gear assembly
using power tool, and then remove steering gear assembly from
vehicle.
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-62,
"Adjustment of Steering Angle Sensor Neutral Position" . Tool number : HT72520000 (J-25730-A)
SDIA1434E
LGIA0032E
LGIA0029E
LGIA0024E

POWER STEERING GEAR AND LINKAGE
PS-17
C
D
E
F
H
I
J
K
L
MA
B
PS
Revision: August 20072004 QX56

With steering wheel in straight ahead position, make sure slit of
lower joint fits with the projection on rear cover cap, while check-
ing 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 AssemblyEGS000MV
SST 4 91 C
1. Outer socket 2. Boot clamp (small) 3. Boot
4. Inner socket 5. Boot clamp (large) 6. Gear housing assembly
7. Cylinder tubes 8. Rear cover cap 9. Rear cover
10. O-ring 11. Sub-gear assembly 12. Rack oil seal
13. Rack assembly 14. Rack Teflon® ring 15. O-ring
16. End cover assembly
WGIA0093E

PS-18
POWER STEERING GEAR AND LINKAGE
Revision: August 20072004 QX56
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 discharge and return port connectors.
DISASSEMBLY
1. Remove cylinder tubes from gear housing assembly.
2. Remove rear cover cap from gear housing assembly.
3. Measure adjusting screw height from gear housing assembly,
then loosen adjusting screw.
CAUTION:

Do not turn adjusting screw more than twice.

Replace steering gear assembly when adjusting screw is
removed or more than twice.
4. Use a Tool to remove rear cover from sub-gear assembly.
5. Remove O-ring with a flat-bladed screwdriver, and pull out rear
cover.
6. Remove sub-gear assembly from gear housing assembly.
CAUTION:
In order to protect oil seal from any damage, pull sub-gear assembly straight out.
7. Loosen lock nut of outer socket, and remove outer socket.
8. 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, replace them to avoid fluid leaks.
SGIA0568E
Tool number : — (J-46213)
WGIA0146E
SGIA0508E

POWER STEERING GEAR AND LINKAGE
PS-19
C
D
E
F
H
I
J
K
L
MA
B
PS
Revision: August 20072004 QX56
9. Drill out the clinching part of cylinder outer rim with a 3 mm (0.12
in) drill bit, drill to a depth of 1.5 mm (0.059 in).
10. Remove end cover assembly with a 45 mm (1.77 in) open head
wrench or suitable tool.
CAUTION:
Be careful not to damage gear housing assembly. If it is
damaged, replace gear housing assembly. Otherwise, fluid
leaks may result.
11. Pull rack assembly with oil seal out of gear housing assembly.
CAUTION:
Be careful not to damage cylinder. If it is damaged, replace gear housing assembly. Otherwise,
fluid leaks may result.
12. Heat rack Teflon® ring to approximately 40°C (104°F) with a
dryer, then remove it and O-ring from rack assembly.
CAUTION:
Be careful not to damage rack assembly. If it is damaged,
replace with a new one to avoid fluid leaks.
13. Use a taped 29 mm (1.14 in) socket and an extension bar.
Remove rack oil seal from gear housing assembly.
CAUTION:
Be careful not to damage gear housing assembly and cylin-
der inner wall. If it is damaged, gear housing assembly
must be replaced. Otherwise, fluid leaks will result.
STC0013D
SST 0 81 B
SGIA0151E
SGIA0179E