lock INFINITI QX56 2004 Factory Service Manual

POWER STEERING GEAR AND LINKAGE
PS-17
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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-23
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Revision: August 20072004 QX56
6. After tightening end cover assembly, caulk cylinder at one point
as shown using a punch. This will prevent end cover from get-
ting loose.
7. Install sub-gear assembly to gear housing assembly.
CAUTION:
Oil seal may be damaged if sub-gear assembly is not installed correctly.
8. Apply Genuine NISSAN PSF or equivalent to O-ring. Refer to MA-10, "
RECOMMENDED FLUIDS AND
LUBRICANTS" . Then install O-ring to rear cover.
NOTE:
Do not reuse O-ring.
9. Install rear cover to gear housing assembly using Tool.
10. Make sure projection on rear cover cap aligns with mark on gear housing assembly.
11. Apply thread locking sealant (Refer to GI-45, "
RECOMMENDED
CHEMICAL PRODUCTS AND SEALANTS" ) to the thread of
the adjusting screw. Then set adjusting screw height from gear
housing assembly. The adjusting screw height is the same as it
was measured previously.
12. Rotate pinion ten times through entire rack range to seat gears and to check operation.
13. With steering gear in neutral position, measure pinion rotating
torque using Tool from within –180° to +180°, while applying and
holding maximum torque to pinion gear.
14. After loosening adjusting screw once, tighten it again with torque of 5.4 N·m (0.55 kg-m, 48 in-lb). Then
loosen it within 20° – 40°.
SGIA0158E
Tool number : — (J-46213)
SGIA0568E
Tool number A: ST3127S000 (J25765-A)
B: KV48103400 ( — )
WGIA0147E

PS-24
POWER STEERING GEAR AND LINKAGE
Revision: August 20072004 QX56
15. Measure pinion rotating torque using Tool, then confirm whether
the reading is within the specified value. If the reading is not
within the specified value, readjust screw angle with adjusting
screw. If the reading is still not within the specified value or the
rotating torque of adjusting screw is less than 5 N·m (0.51 kg-m,
44 in-lb), replace the steering gear assembly.
16. Turn pinion to the full left lock position with inner socket to gear housing assembly.
17. Mount dial gauge to rack as shown. Measure vertical movement
of rack when pinion is turned counterclockwise with torque of
19.6 N·m (2.0 kg-m, 14 ft-lb). Check if reading is within the spec-
ified value. If reading is outside of the specification, readjust
screw angle with adjusting screw. If reading is still outside of
specification, or if the rotating torque of adjusting screw is less
than 5 N·m (0.51 kg-m, 44 in-lb), replace the steering gear
assembly.
18. Install large-diameter side of boot to gear housing assembly.
19. Install small-diameter side of boot to the mounting groove of
inner socket boot.
20. Install boot clamp to the small-diameter side of boot.Pinion rotating torque:
Around neutral position (within ±100°)
Average “A”:
0.8 − 2.0 N·m (0.09 − 0.20 kg-m, 7 − 17 in-lb)
Other than above (more than ±100°)
Maximum variation “B”:
2.3 N·m (0.23 kg-m, 20 in-lb)
SGIA0160E
Tool number : ST3127S000 (J25765-A)
WGIA0148E
Amount of vertical movement with rack Less than 0.265 mm (0.010 in)
Measuring pointAxial direction of rack5 mm (0.197 in) away from end of
gear housing
Radius direction of rack Shaft direction of adjusting screw
SGIA0550E

POWER STEERING GEAR AND LINKAGE
PS-25
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Revision: August 20072004 QX56
21. Install new boot clamps and crimp securely using Tool.
CAUTION:
Do not reuse boot clamps.
22. Install cylinder tubes to gear housing assembly.
23. Install lock nut and outer socket to inner socket.
24. Tighten lightly tie-rod in specified length “L”, then tighten lock nut
at specified torque. Refer to PS-17, "
Disassembly and Assem-
bly" . Reconfirm if tie-rod length is within limit of specified length
“L”.
CAUTION:
Perform toe-in adjustment after this procedure. Length
achieved after toe-in adjustment is not necessarily the
value given here.Tool number : KV40107300 ( — )
AST 1 39
Inner socket length “L” : 115.2 mm (4.54 in)
SGIA0167E

POWER STEERING OIL PUMP
PS-27
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PS
Revision: August 20072004 QX56
Disassembly and AssemblyEGS000MY
INSPECTION BEFORE DISASSEMBLY
Disassemble power steering oil pump only if the following conditions are found.

Oil leakage from oil pump

Deformed or damaged pulley

Poor performance
DISASSEMBLY
CAUTION:
When retaining drive shaft in a vise, always use copper or aluminum plates between vise and shaft.
NOTE:
Mount the oil pump in a vise as needed.
1. Unscrew three bracket bolts and remove bracket from rear cover.
2. Unscrew four rear cover bolts and remove rear cover from body assembly.
3. Remove gasket from body assembly.
4. Remove lock pin, cartridge and side plate from body assembly.
5. Remove pulley from drive shaft assembly.
1. Bracket 2. Rear cover 3. Gasket
4. Lock pin 5. Cam ring 6. Rotor
7. Vane 8. Cartridge 9. Side plate
10. O-ring 11. Body assembly 12. Oil seal
13. Drive shaft assembly 14. Snap ring 15. Pulley
16. Spring washer 17. Flow control valve 18. Pressure sensor
19. Connector bolt 20. Copper washer 21. Bracket
22. Suction pipe 23. O-ring
WGIA0076E

POWER STEERING OIL PUMP
PS-29
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Revision: August 20072004 QX56
2. Install oil seal to body assembly using suitable tool.
NOTE:
Do not reuse oil seal.
3. Apply a coat of Genuine NISSAN PSF or equivalent to drive shaft assembly and press drive shaft assem-
bly into body assembly with suitable tool, then install snap ring.
NOTE:
Do not reuse snap ring.
4. Apply a coat of Genuine NISSAN PSF or equivalent to O-ring and install O-ring into body assembly.
NOTE:
Do not reuse O-ring.
5. Install side plate to body assembly.
6. Install lock pin into lock pin hole, and install cam-ring as shown.

When installing cam ring, align letter "E" to rear cover as
shown.
CAUTION:
Do not confuse the assembling direction of cam ring. If
cam ring is installed facing the incorrect direction, it may
cause pump operation malfunction.
7. Install rotor to body assembly.
SST 0 38 A
SGIA0422E
WGIA0079E

PS-30
POWER STEERING OIL PUMP
Revision: August 20072004 QX56

When installing rotor, the punch mark on the face of the rotor
faces the body assembly.
8. Install vane to rotor with round portion facing outside.
9. Check if drive shaft assembly turns smoothly.
10. Install gasket to body assembly.
NOTE:
Do not reuse gasket.
11. Install rear cover to body assembly and tighten bolts to the specified torque.
12. Install bracket to rear cover and tighten bolts at the specified torque.
13. Install pulley to drive shaft assembly then tighten lock nut at the specified torque.
14. Install spring and flow control valve, copper washers, joint and connector bolt to body assembly. Then
tighten connector bolt to the specified torque.
NOTE:
Do not reuse O-ring.
15. Apply a coat of Genuine NISSAN PSF or equivalent to O-ring, then install O-ring to suction pipe.
NOTE:
Do not reuse O-ring.
16. Install suction pipe to body assembly.
SGIA0424E
SST 8 43 A

RAX-8
REAR DRIVE SHAFT
Revision: August 20072004 QX56
5. Separate the drive shaft from the wheel hub and bearing assembly by lightly tapping the end with a suit-
able hammer and wood block. If it is difficult to separate, use a suitable puller.
6. Remove the drive shaft.
CAUTION:
When removing the drive shaft, do not bend at an excessive angle to the drive shaft joint. Do not
excessively extend the slide joint.
INSPECTION AFTER REMOVAL

Move the joint up and down, left and right, and in the axial direc-
tion. Check for any rough movement or significant looseness.

Check the boot for cracks or other damage, and for any grease
leakage.

If necessary, disassemble the drive shaft, and repair as neces-
sary.
INSTALLATION
Installation is in the reverse order of removal.

Apply grease 44003 7S000CM to contact surface (A) between
wheel hub and bearing assembly and drive shaft as shown. Use
sufficient grease to completely coat contact area.

Do not reuse the drive shaft inside flange bolts, discard after
removal and use new drive shaft bolts for installation.

Do not reuse cotter pin, discard after removal and use a new
cotter pin for installation.
Disassembly and AssemblyEDS001AW
RAA0030D
WDIA0299E
1. Plug 2. Housing 3. Snap ring
4. Ball cage, steel ball, liner race assembly 5. Stopper ring 6. Boot band
7. Boot 8. Shaft 9. Circlip
10. Joint sub-assembly
WDIA0221E

RF-4
SQUEAK AND RATTLE TROUBLE DIAGNOSES
Revision: August 20072004 QX56
SQUEAK AND RATTLE TROUBLE DIAGNOSESPFP:00000
Work FlowEIS002WG
CUSTOMER INTERVIEW
Interview the customer if possible, to determine the conditions that exist when the noise occurs. Use the Diag-
nostic Worksheet during the interview to document the facts and conditions when the noise occurs and any
customer comments; refer to RF-8, "
Diagnostic Worksheet" . This information is necessary to duplicate the
conditions that exist when the noise occurs.

The customer may not be able to provide a detailed description or the location of the noise. Attempt to
obtain all the facts and conditions that exist when the noise occurs (or does not occur).

If there is more than one noise in the vehicle, be sure to diagnose and repair the noise that the customer
is concerned about. This can be accomplished by test driving the vehicle with the customer.

After identifying the type of noise, isolate the noise in terms of its characteristics. The noise characteristics
are provided so the customer, service adviser and technician are all speaking the same language when
defining the noise.

Squeak —(Like tennis shoes on a clean floor)
Squeak characteristics include the light contact/fast movement/brought on by road conditions. Hard sur-
faces = higher pitch noise/softer surfaces = lower pitch noises/edge to surface = chirping.

Creak—(Like walking on an old wooden floor)
Creak characteristics include firm contact/slow movement/twisting with a rotational movement/pitch
dependent on materials/often brought on by activity.

Rattle—(Like shaking a baby rattle)
Rattle characteristics include the fast repeated contact/vibration or similar movement/loose parts/missing
clip or fastener/incorrect clearance.

Knock —(Like a knock on a door)
Knock characteristics include hollow sounding/sometimes repeating/often brought on by driver action.

Tick—(Like a clock second hand)
Tick characteristics include gentle contacting of light materials/loose components/can be caused by driver
action or road conditions.

Thump—(Heavy, muffled knock noise)
Thump characteristics include softer knock/dead sound often drought on by activity.

Buzz—(Like a bumble bee)
Buzz characteristics include high frequency rattle/firm contact.

Often the degree of acceptable noise level will vary depending upon the person. A noise that you may
judge as acceptable may be irritating to the customer.

Weather conditions, especially humidity and temperature, may have a great effect on noise level.
SBT 8 42