fluid INFINITI QX56 2004 Factory Service Manual

POWER STEERING GEAR AND LINKAGE
PS-19
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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

POWER STEERING GEAR AND LINKAGE
PS-21
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PS
Revision: August 20072004 QX56
ASSEMBLY
1. Apply Genuine NISSAN PSF or equivalent to O-ring. Put an O-ring into rack Teflon® ring.

Refer to MA-10, "RECOMMENDED FLUIDS AND LUBRICANTS" .
CAUTION:
Do not reuse O-ring.
2. Heat rack Teflon® ring to approximately 40°C (104°F) with a
dryer. Assemble it to mounting groove of rack.
CAUTION:
Do not reuse rack Teflon® ring.
3. To fit rack Teflon® ring on rack, use rack Teflon® ring installation tool from tooth side. Compress rim of
ring using Tool.
4. Apply multi-purpose grease to rack oil seal. Insert rack oil seal, then insert rack assembly to gear housing
assembly. Refer to MA-10, "
RECOMMENDED FLUIDS AND LUBRICANTS" .
CAUTION:

Do not reuse rack oil seal.

When inserting rack assembly, do not damage retainer sliding part. If it is damaged, replace
gear housing assembly.

When inserting rack assembly, do not damage cylinder inner wall. If it is damaged, it may cause
oil leaks. Replace gear housing assembly.

Attach rack oil seal. Both inner lip and outer lip should
face each other.
SGIA0153E
Tool number : KV48104400 ( — )
SGIA0154E
SGIA0205E

POWER STEERING GEAR AND LINKAGE
PS-23
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PS
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-26
POWER STEERING OIL PUMP
Revision: August 20072004 QX56
POWER STEERING OIL PUMPPFP:49110
On-Vehicle Inspection and ServiceEGS000MW
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, disassemble and repair oil pump. Refer to PS-17, "Dis-
assembly 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 PS-6, "
Air Bleeding Hydraulic System" .
Removal and InstallationEG S0 0 0MX
REMOVAL
1. Drain power steering fluid from reservoir tank.
2. Remove engine room cover. Refer to EM-11, "
Removal and Installation" .
3. Remove air duct assembly. Refer to EM-14, "
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-12,
"Removal and Installation" .
6. Disconnect pressure sensor electrical connector.
7. Remove high pressure and low pressure piping from power steering oil pump. Refer to PS-31, "
HYDRAU-
LIC LINE" .
8. Remove mounting bolts, then remove power steering pump.
INSTALLATION
Installation is in the reverse order of removal. Refer to PS-31, "HYDRAULIC LINE" for tightening torque.

After installation, bleed air. Refer to PS-6, "Air Bleeding Hydraulic System" .
NOTE:
Belt tension is automatic and requires no adjustment.
Tool number:
Pressure gauge and shut-off valveKV48103500
(J26357 and J26357-10)
Oil pump sideConnector A and
O-ringKV48105300-4 and 5295262U10
(—)
Eye-bolt and O-ringKV48105300-3 and 5295262U00
(—)
High pressure
piping sideConnector B and
O-ringKV48105300-1 and 5295262U00
(—)
NutKV48105300-2
( — )
Relief oil pressure
: 9.0 – 9.8 mPa (91.77 – 99.93 kg/cm2 , 1305.34 – 1421.37 psi)
SGIA0570E

PS-28
POWER STEERING OIL PUMP
Revision: August 20072004 QX56
6. Remove snap ring from drive shaft assembly, then press out
drive shaft assembly.
CAUTION:
When removing snap ring, be careful not to damage drive
shaft assembly.
7. Using a screwdriver, remove oil seal from body assembly.
8. Remove O-ring from body assembly.
9. Remove connector bolt, then flow control valve and spring from
body assembly.
CAUTION:
Be careful not to drop and deform the flow control valve.
10. Remove suction pipe from body assembly.
11. Remove O-ring for suction pipe.
INSPECTION AFTER DISASSEMBLY
Body Assembly and Rear Cover Inspection

Check body assembly and the inside of rear cover for damage. If any damage is found, replace with new
part for rear cover and replace with new power steering pump assembly for body assembly.
Cartridge Assembly Inspection

Check cam ring, side plate, rotor and vane for damage. If any damage is found, replace cartridge assem-
bly with new one.
ASSEMBLY
CAUTION:
When retaining drive shaft assembly in a vise, always use copper or aluminum plates between vise
and shaft.
NOTE:
Mount the oil pump in a vise as needed.
1. Apply a coat of Genuine NISSAN PSF or equivalent to oil seal lip and to the circumference of oil seal.
Refer to MA-10, "
RECOMMENDED FLUIDS AND LUBRICANTS" .
SST 0 10 B
SST 0 34 A
SGIA0524E

SERVICE DATA AND SPECIFICATIONS (SDS)
PS-35
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PS
Revision: August 20072004 QX56
Steering GearEGS000NI
Oil PumpEG S0 0 0NJ
Steering FluidEGS000NK
Steering gear modelPR26AM
Rack neutral position, dimension “L” (rack stroke) 85.5 mm (3.36 in)
Rack sliding forceAt the neutral point:
Range within ± 11.5 mm
(±0.453 in) from the neutral
position
(in power ON)Area average value 147 − 211 N (14.99 − 21.52 kg, 33.1 − 47.52 lb)
Allowable variation 98 N (10 kg, 22 lb) or less
Whole area (in power OFF)Peak value 294 N (30.0 kg, 66 lb) or less
Allowable variation 147 N (16 kg, 35 lb) or less
STC0034D
Relief oil pressure
9.0 − 9.8 mPa (91.77 − 99.93 kg/cm2 , 1305.34 − 1421.37 psi)
Fluid capacity
Approx. 1.0 (1-1/8 US qt, 7/8 Imp qt)

REAR DRIVE SHAFT
RAX-11
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RAX
Revision: August 20072004 QX56
4. Install the ball cage, steel ball, and inner race assembly on the
shaft, and secure them tightly using the snap ring.
NOTE:
Discard the old snap ring and use a new one for assembly.
5. Insert the specified quantity of Genuine NISSAN Grease or
equivalent, onto the housing (indicated by * marks), and install it
onto shaft. Refer to MA-10, "
RECOMMENDED FLUIDS AND
LUBRICANTS" .
6. Install the stopper ring onto the housing.
7. After installation, pull on the shaft to check engagement between the joint sub-assembly and the stopper
ring.
8. Install the boot securely into the grooves (indicated by * marks)
as shown.
CAUTION:
If there is grease on boot mounting surfaces (indicated by*
marks) of shaft and housing, boot may come off. Remove
all grease from surfaces.
9. Check that the boot installation length “L” is the specified length.
Insert a flat-bladed screwdriver or similar tool into bigger side of
boot. Bleed the air from the boot to prevent any boot deforma-
tion.
CAUTION:

The boot may break if the boot installation length is less than the specified length.

Do not touch the tip of the screwdriver to the inside of the boot.
10. Secure the big and small ends of the boot with the new boot
bands as shown.
NOTE:
Discard the old boot bands and use new ones for assembly.
11. After installing the housing and shaft, rotate the boot to check that the boot is positioned correctly. If the
boot is not positioned correctly, reposition the boot and secure the boot using a new boot band.
SDIA11 25 E
Grease capacity : 175 − 195 g (6.17 − 6.88 oz)
RAC0678D
Boot installation length “L ” : 147.9 mm (5.82 in)WDIA0287E
SFA39 5

RAX-12
REAR DRIVE SHAFT
Revision: August 20072004 QX56
Wheel Side
1. Insert the Genuine NISSAN Grease or equivalent, into the joint
sub-assembly serration hole until the grease begins to ooze
from the ball groove and serration hole. Refer to MA-10, "
REC-
OMMENDED FLUIDS AND LUBRICANTS" . After inserting the
grease, use a shop cloth to wipe off the grease that has oozed
out.
2. Wind the serrated part of the shaft with tape. Install the boot
band and boot onto the shaft. Do not damage the boot.
NOTE:
Discard the old boot band and boot and use a new one for
assembly.
3. Remove the protective tape wound around the serrated part of
the shaft.
4. Attach the circlip to the shaft. The circlip must fit securely into
the shaft groove. Attach the nut to the joint sub-assembly.
Use a soft hammer to press-fit the circlip.
NOTE:
Discard the old circlip and use a new one for assembly.
5. Insert the specified quantity of Genuine NISSAN Grease or
equivalent, into the housing from the large end of the boot. Refer
to MA-10, "
RECOMMENDED FLUIDS AND LUBRICANTS" .
6. Install the boot securely into the grooves (indicated by the *
marks) as shown.
CAUTION:
If there is grease on the boot mounting surfaces (indicated
by the * marks) of the shaft and housing, the boot may
come off. Remove all grease from the shaft surfaces.
7. Check that the boot installation length “L” is the specified length.
Insert a flat-bladed screwdriver or similar tool into the bigger
side of the boot. Bleed the air from the boot to prevent boot
deformation.
CAUTION:

The boot may break if the boot installation length is less than the specified length.

Do not contact inside surface of boot with the tip of the screwdriver.
SDIA11 27 E
SFA80 0
Grease capacity : 140 − 160 g (4.93 − 5.64 oz)
RAC0049D
Boot installation length “L” : 134.5 mm (5.30 in)WDIA0288E

NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING
RFD-5
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RFD
Revision: August 20072004 QX56
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTINGPFP:00003
NVH Troubleshooting ChartEDS002JJ
Use the chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.
×: Applicable Reference page
RFD-17RFD-19RFD-19RFD-12—
MA-10, "
Fluids and Lubricants
"
PR-3, "
NVH Troubleshooting Chart
"
FA X - 4
(FAX), RAX-4
(RAX), FSU-4
(FSU), RFD-5
(RSU)
WT-3, "
NVH Troubleshooting Chart
"
WT-3, "
NVH Troubleshooting Chart
"
FA X - 4 , "
NVH Troubleshooting Chart
" (front)
RAX-4, "
NVH Troubleshooting Chart
" (rear)
BR-5, "
NVH Troubleshooting Chart
"
PS-5, "
NVH Troubleshooting Chart
"
Possible cause and SUSPECTED PARTS
Rough gear tooth
Improper gear contact
Tooth surfaces worn
Incorrect backlash
Companion flange excessive runout
Improper gear oil
PROPELLER SHAFT
AXLE AND SUSPENSION
TIRES
ROAD WHEEL
DRIVE SHAFT
BRAKES
STEERING
Symptom FINAL DRIVE Noise×××××××××××××

FRONT OIL SEAL
RFD-7
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RFD
Revision: August 20072004 QX56
7. Remove the front oil seal using Tool as shown.
INSTALLATION
1. Apply multi-purpose grease to the sealing lips of the new oil
seal, then press the front oil seal into the carrier using Tool as
shown.
CAUTION:

Keep the oil seal even when installing, do not tilt the oil
seal when pressing it in.

Discard the old oil seal, always install a new oil seal.
2. Align the matching mark of the drive pinion with the matching
mark “B” of the companion flange as shown, then install the
companion flange.
3. Apply oil or multi-purpose grease on the drive pinion threads
and the seating surface of drive pinion nut.
4. Install drive pinion nut using Tool.

Tighten the drive pinion nut to the minimum specified torque.
Final drive pinion nut torque will be determined when adjust-
ing the total preload. Refer to RFD-12, "
TOTAL PRELOAD" .
CAUTION:
The drive pinion nut is not reusable. Use a new drive pinion
nut for installation.
5. Install the rear propeller shaft. Refer to PR-8, "
Removal and Installation" .
6. Connect the rear drive shafts to the rear final drive. Tighten the drive shaft inside flange bolts to specifica-
tion.
7. Check the rear final drive fluid and add fluid as necessary. Refer to MA-24, "
Checking Final Drive Oil" . Tool number : ST33290001 (J-34286)
LDIA0107E
Tool number : ST15310000 ( — )
LDIA0108E
SDIA0270E
Tool number : KV40104000 ( — )
Drive pinion nut : 167 - 372 N·m (17 - 38 kg-m,
124 - 274 ft-lb)
LDIA0105E
Drive shaft inside flange bolt : 118 N·m (12 kg-m, 87 ft-lb)