2006 INFINITI M35 Oil

PS-10
STEERING WHEEL
Revision: 2006 January2006 M35/M45
STEERING WHEELPFP:48430
On-Vehicle Inspection and ServiceNGS000D8
CHECKING CONDITION OF INSTALLATION
Check installation conditions of steering gear assembly, front suspension assembly, axle and steering col-
umn assembly.
Check if movement exists when steering wheel is moved up and down, to the left and right and to the axial
direction.
Check steering gear assembly mounting bolts and nut for looseness. Refer to PS-18, "COMPONENTS" .
CHECKING STEERING WHEEL PLAY
Turn steering wheel so that front wheels come to the straight-ahead position. Start engine and lightly turn
steering wheel to the left and right until front wheels start to move. Measure steering wheel movement on
the outer circumference.
When the measurement value is outside the standard value, check backlash for each joint of steering col-
umn assembly and installation condition of steering gear assembly.
CHECKING NEUTRAL POSITION STEERING WHEEL
Make sure that steering gear assembly, steering column assembly and steering wheel are installed in the
correct position.
Perform neutral position inspection after wheel alignment. Refer to FSU-6, "Wheel Alignment Inspection"
(2WD), FSU-23, "Wheel Alignment Inspection" (AWD).
Set vehicle to the straight-ahead position and confirm steering wheel is in the neutral position.
Loosen outer socket lock nut and turn inner socket to left and right equally to make fine adjustments if
steering wheel is not in the neutral position.
CHECKING STEERING WHEEL TURNING FORCE
1. Park vehicle on a level and dry surface, set parking brake.
2. Start engine.
3. Bring power steering fluid up to adequate operating temperature. [Make sure temperature of fluid is
approximately 50 to 80
C (122 to 176F).]
4. Check steering wheel turning force when steering wheel has
been turned 540
from neutral position.
NOTE:
Multiply the distance (L) from the hook of spring scale to the
center of steering wheel by the measurement value with a spring
scale.
5. If steering wheel turning force is out of the specification, check
rack sliding force and relief hydraulic pressure of oil pump.
Regarding relief hydraulic pressure of oil pump, refer to PS-29,
"CHECKING RELIEF OIL PRESSURE" .
a. Disconnect lower joint and steering knuckle from steering gear assembly. Refer to PS-13, "
COMPO-
NENTS" , FAX-5, "COMPONENT" .
b. Start and run engine at idle to make sure steering fluid has reached normal operating temperature. Steering wheel axial end play : 0 mm (0 in)
Steering wheel play : 0 - 35 mm (0 - 1.38 in)
Steering wheel turning
force: 7.45 Nꞏm (0.76 kg-m, 66 in-lb)
SGIA1025J

PS-20
POWER STEERING GEAR
Revision: 2006 January2006 M35/M45
Disassembly and AssemblyNGS000DD
COMPONENTS
CAUTION:
Disassemble and assemble steering gear assembly by securing the mounting area in a vise using
copper plates.
Clean steering gear assembly with kerosene before disassembling. Be careful to avoid splashing
or applying any kerosene over connector of discharge port or return port.
1. Outer socket 2. Boot clamp 3. Boot
4. Inner socket 5. Boot clamp (stainless wire) 6. End cover assembly
7. Rack oil seal 8. Rack Teflon ring 9. O-ring
10. Rack assembly 11. Gear housing assembly 12. Cylinder tubes
13. O-ring 14. Gear-sub assembly 15. EPS solenoid valve
16. Rear cover cap
Refer to GI-11, "
Components" , and the followings for the symbols in the figure.
: Apply power steering fluid.
: Apply Genuine Liquid Gasket, Three Bound 1111 B o r equivalent.
: Apply multi-purpose grease.
SGIA1388E

POWER STEERING GEAR
PS-21
C
D
E
F
H
I
J
K
L
MA
B
PS
Revision: 2006 January2006 M35/M45
DISASSEMBLY
1. Remove fixing bolts of EPS solenoid valve, and then remove EPS solenoid valve from gear-sub assembly.
2. Remove cylinder tubes from gear housing assembly.
3. Remove rear cover cap from gear-sub assembly.
4. Measure adjusting screw height “H”, and loosen adjusting
screw.
CAUTION:
Do not loosen adjusting screw 2 turns or more.
Replace steering gear assembly if adjusting screw is
loosened 2 turns or more and it is removed.
5. Remove fixing bolts of gear-sub assembly, and then remove
gear-sub assembly from gear housing assembly.
6. Remove O-ring from gear housing assembly.
7. Loosen outer socket lock nut, and remove outer socket.
8. Remove boot clamp, and then remove boot from inner socket.
CAUTION:
Do not damage inner socket and gear housing assembly when removing boot. Inner socket and
gear housing assembly must be replaced if inner socket and gear housing assembly are damaged
because it may cause foreign material interfusion.
9. Remove inner socket from gear housing assembly.
10. Drill out the clinching part of gear housing assembly (end cover
assembly side) outer rim with a 3 mm (0.12 in) drill bit. [Drill for
approximately 1.5 mm (0.059 in) depth.]
11. Remove end cover assembly with a 36 mm (1.42 in) open head
(suitable tool).
CAUTION:
Do not damage rack assembly surface when removing.
Rack assembly must be replaced if damaged because it
may cause fluid leakage.
12. Pull rack assembly together with rack oil seal (outer side) out
from gear housing assembly.
CAUTION:
Do not damage cylinder inner wall when removing rack
assembly. Gear housing assembly must be replaced if dam-
aged because it may cause fluid leakage.
13. Heat rack Teflon ring to approximately 40
C (104F) with a
dryer, and remove rack Teflon ring and O-ring from rack assem-
bly.
CAUTION:
Do not damage rack assembly. Rack assembly must be
replaced if damaged because it may cause fluid leakage.
SGIA0624E
STC0013D
SST081B
SGIA0151E

PS-22
POWER STEERING GEAR
Revision: 2006 January2006 M35/M45
14. Push rack oil seal inside with a 29 mm (1.14 in) socket and an
extension bar to push out rack oil seal (inner side) from gear
housing assembly.
CAUTION:
Do not damage gear housing assembly and cylinder inner
wall. Gear housing assembly must be replaced if damaged
because it may cause fluid leakage.
INSPECTION AFTER DISASSEMBLY
Boot
Check boot for cracks. Replace if there are.
Rack Assembly
Check rack for damage or wear. Replace if there are.
Gear-Sub Assembly
Check pinion gear for damage or wear. Replace if there are.
Rotate pinion and check for torque variation or rattle. Replace if there are.
Gear Housing Assembly
Check gear housing assembly for damage and scratches (inner wall). Replace if there are.
SGIA0179E

PS-24
POWER STEERING GEAR
Revision: 2006 January2006 M35/M45
ASSEMBLY
1. Apply power steering fluid to O-ring. Put an O-ring into rack Teflon ring.
2. Heat rack Teflon ring to approximately 40
C (104F) with a
dryer. Assemble it to mounting groove of rack assembly.
3. Install the Teflon ring correcting tool [SST] from tooth side of
rack to fit rack Teflon ring on rack. Compress the ring with tool.
4. Apply multi-purpose grease to rack oil seal. And install rack oil
seal in the following procedure. Then assemble rack assembly
to gear housing assembly.
CAUTION:
Install rack oil seal in a direction so that the lip of inner oil
seal and the lip of outer oil seal face each other.
Do not damage retainer sliding surface by rack assembly.
Replace gear housing assembly if damaged.
Do not damage gear housing assembly inner wall by rack
assembly. Gear housing assembly must be replaced if
damaged because it may cause fluid leakage.
a. Wrap an OHP sheet [approximately 70 mm (2.76 in)
100 mm
(3.94 in)]. Around rack assembly teeth to avoid damaging rack
oil seal (inner). Install rack oil seal over sheet. Then, pull oil seal
along with OHP sheet until they pass rack assembly teeth, and
remove OHP sheet.
SGIA0153E
SGIA0154E
SGIA0205E
SGIA0155E

POWER STEERING GEAR
PS-25
C
D
E
F
H
I
J
K
L
MA
B
PS
Revision: 2006 January2006 M35/M45
b. Insert rack oil seal (inner) into rack assembly piston (rack Te f l o n
ring).
c. Push retainer to adjusting screw side by hand, and move the
rack assembly inside the gear housing assembly so that the
rack oil seal (inner) can be pressed against the gear housing
assembly.
d. Wrap an OHP sheet [approximately 70 mm (2.76 in)
100 mm
(3.94 in)]. Around the edge to avoid damaging rack oil seal
(outer). Install rack oil seal over sheet. Then, pull oil seal along
with OHP sheet until they pass rack edge, and remove OHP
sheet.
e. Install end cover assembly to rack edge, and move rack oil seal
(outer) until it contacts with gear housing assembly.
5. Tighten end cover assembly to specified torque using a 36 mm
(1.42 in) open head (suitable tool).
CAUTION:
Do not damage rack assembly. Replace it if damaged
because it may cause fluid leakage.
6. Crimp gear housing assembly at one point using a punch as
shown in the figure so as to prevent end cover assembly from
getting loose after tightening end cover assembly.
7. Apply power steering fluid to O-ring, and then install O-ring to
gear housing assembly.
8. Install gear-sub assembly to gear housing assembly.
9. Install EPS solenoid valve to gear-sub assembly.
10. Decide on the neutral position for the rack.
11. Install rear cover cap to gear sub-assembly.
CAUTION:
Make sure that the projection of rear cover cap is aligned
with the marking position of gear housing assembly.
SGIA0671E
SGIA0157E
SST081B
SGIA0871E
Drive type 2WD AWD
Rack stroke “L” 68.5 mm (2.697 in) 67.0 mm (2.638 in)
SGIA0877E

POWER STEERING OIL PUMP
PS-29
C
D
E
F
H
I
J
K
L
MA
B
PS
Revision: 2006 January2006 M35/M45
POWER STEERING OIL PUMPPFP:49110
On-Vehicle Inspection and ServiceNGS000DE
CHECKING RELIEF OIL PRESSURE
CAUTION:
Make sure that belt tension is normal before starting the following procedure.
1. Connect the hydraulic pressure gauge [SST] between oil pump
discharge connector and high-pressure hose. Bleed air from the
hydraulic circuit while opening valve fully. Refer to PS-8, "
Air
Bleeding Hydraulic System" .
2. Start engine. Run engine until oil temperature reaches 50 to
80
C (122 to 176F).
CAUTION:
Leave the valve of the hydraulic pressure gauge [SST]
fully open while starting and running engine. If engine is
started with the valve closed, the hydraulic pressure in
oil pump goes up to the relief pressure along with
unusual increase of oil temperature.
Be sure to keep hose clear of belts and other parts when
engine is started.
3. Fully close the hydraulic pressure gauge [SST] valve with
engine at idle and measure the relief oil pressure.
CAUTION:
Never keep valve closed for 10 seconds or longer.
4. Open the valve slowly after measuring. Repair oil pump is the
relief oil pressure is outside the standard. Refer to PS-30, "
Dis-
assembly and Assembly (Models with VK45DE)" , PS-34, "Disassembly and Assembly (Models with
VQ35DE)" .
5. After inspection, disconnect the hydraulic pressure gauge [SST] from hydraulic circuit, then add fluid and
bleed air. Refer to PS-8, "
Air Bleeding Hydraulic System" .
Removal and InstallationNGS000DF
REMOVAL
1. Drain power steering fluid from reservoir tank.
2. Remove undercover from vehicle with a power tool.
3. Loosen drive belt. Refer to EM-15, "
DRIVE BELTS" (VQ35DE), EM-174, "DRIVE BELTS" (VK45DE).
4. Remove drive belt from oil pump pulley.
5. Remove piping of high pressure and low pressure (drain fluid from their pipings). Refer to PS-38,
"HYDRAULIC LINE" .
6. Remove oil pump mounting bolts, and then remove power steering oil pump. Refer to PS-38, "
Compo-
nents" .
INSTALLATION
Installation is the reverse order of removal. For tightening torque, refer to PS-38, "HYDRAULIC LINE" .
Perform the following procedure after installing.
–Adjust belt tension (VQ35DE). Refer to EM-15, "Tension Adjustment" .
–About the installation of VK45DE drive belt, refer to EM-174, "Tension Adjustment" .
–Bleed air. Refer to PS-8, "Air Bleeding Hydraulic System" . Relief oil pressure:
8,520 - 9,320 kpa (86.9 - 95.1 kg/cm
2 , 1,235 - 1,351 psi)
SGIA0915E

PS-30
POWER STEERING OIL PUMP
Revision: 2006 January2006 M35/M45
Disassembly and Assembly (Models with VK45DE)NGS000DG
COMPONENTS
INSPECTION BEFORE DISASSEMBLY
Disassemble oil pump only when the following malfunctions occur.
If oil leakage is found on oil pump.
Oil pump pulley is damaged or deformed.
Performance of oil pump is low.
1. Pulley 2. Snap ring 3. Drive shaft
4. Joint 5. O-ring 6. Connector bolt
7. Flow control valve 8. Spring 9. Oil seal
10. Suction pipe 11. O-ring 12. Body assembly
13. O-ring 14. Side plate 15. Vane
16. Rotor 17. Cam ring 18. Cartridge
19. Dowel pin 20. Gasket 21. Rear cover
22. Copper washer
Refer to GI-11, "
Components" , and the followings for the symbols in the figure.
: Apply power steering fluid.
: Apply multi-purpose grease.
SGIA1187E