steering INFINITI M35 2007 Factory Service Manual

POWER STEERING GEAR AND LINKAGE
PS-23
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Revision: 2007 April2007 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, and replace it if a malfunction is detected.
Rack Assembly
Check rack for damage or wear, and replace it if a malfunction is detected.
Gear-Sub Assembly

Check gear-sub assembly for damage or wear, and replace it if a malfunction is detected.

Rotate gear-sub assembly and check for torque variation or rattle, and replace it if a malfunction is
detected.
Gear Housing Assembly
Check gear housing assembly for damage and scratches (inner wall). Replace if there are.
SGIA0179E

PS-24
POWER STEERING GEAR AND LINKAGE
Revision: 2007 April2007 M35/M45
Outer Socket and Inner Socket
1. Ball joint swinging torque

Hook a spring balance at the point shown in the figure and
pull the spring balance. Make sure that the spring balance
reads the specified value when ball stud and inner socket
start to move. Replace outer socket and steering gear assem-
bly if they are outside the standard.
2. Ball joint rotating torque

Make sure that the reading is within the following specified
range using the preload gauge [SST]. Replace outer socket if
the reading is outside the specified value.
3. Ball joint axial end play

Apply an axial load of 490 N (50 kg, 111 lb) to ball stud using a
dial gauge. Measure amount of stud movement, and then
make sure that the value is within the following specified
range. Replace outer socket and inner socket if the measured
value is outside the standard.
SGIA0896E
Items Outer socket Inner socket
Measuring point of spring balance Stud cotter pin mounting hole Measuring point at *mark shown in the figure
Swinging torque0.3 – 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, 9.0 – 69 in-lb)
Spring balance measurement4.81 – 45.7 N
(0.5 – 4.7 kg, 1.1 – 10.4 lb)8.9 – 64 N
(0.9 – 6.5 kg, 2.0 – 14.3 lb)
Outer socket rotating torque 0.3 – 2.9 N·m (0.03 – 0.29 kg-m, 3 – 25 in-lb)
SGIA0941E
Outer socket 0.5 mm (0.020 in) or less
Inner socket 0.2 mm (0.008 in) or less
SGIA0057E

POWER STEERING GEAR AND LINKAGE
PS-25
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Revision: 2007 April2007 M35/M45
ASSEMBLY
1. Apply recommended fluid to O-ring. Put an O-ring into a rack Teflon ring.
2. Heat rack Teflon ring to approximately 40°C (104°F) 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 recommended grease to rack oil seal, and then 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 OHP
sheet along with rack oil seal until they pass rack assembly
teeth, and remove OHP sheet.
SGIA0153E
SGIA0154E
SGIA0205E
SGIA0155E

PS-26
POWER STEERING GEAR AND LINKAGE
Revision: 2007 April2007 M35/M45
b. Insert rack oil seal (inner) into rack assembly piston (rack Teflon
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 recommended fluid to O-ring, and then install O-ring to
gear housing assembly.
8. Install gear-sub assembly to gear housing assembly.
9. Install power steering 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 GEAR AND LINKAGE
PS-27
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Revision: 2007 April2007 M35/M45
12. Apply recommended thread locking sealant to the thread (2
turns thread), and then screw in the adjusting screw until it
reaches height “H” from gear housing assembly measured
before disassembling.
13. Move rack assembly 10 strokes throughout the full stroke so that
the parts can fit with each other.
14. Measure pinion rotating torque within ±180° of neutral position
of the rack assembly using the preload gauge [SST] and preload
adapter [SST]. Stop the gear at the point where highest torque is
read.
15. Loosen adjusting screw and retighten to 5.4 N·m (0.55 kg-m, 48
in-lb), and then loosen by 20 to 40°.
16. Measure pinion rotating torque using the preload adapter [SST]
and preload gauge [SST] to make sure that the measured value
is within the standard. Readjust if the value is outside the stan-
dard. Replace steering gear assembly if the value is outside the
standard after readjusting or adjusting screw rotating torque is 5
N·m (0.51 kg-m, 44 in-lb) or less.
17. Apply recommended liquid gasket to inner socket and turn pinion fully to left with inner socket installed to
gear housing assembly.
18. Set dial gauge as shown in the figure. Measure vertical move-
ment of rack assembly when pinion is turned clockwise with
torque of 19.6 N·m (2.0 kg-m, 14 ft-lb). Readjust adjusting screw
angle if the measured value is outside the standard. Replace
steering gear assembly if the measured value is still outside the
standard or adjusting screw rotating torque is 5 N·m (0.51 kg-m,
44 in-lb) or less.
SGIA0624E
SGIA0942E
SGIA0936E
Pinion rotating torque standard 2WD AWD
Around neutral position (within±100°)
Average A1.95 - 2.58 N·m
(0.20 - 0.26 kg-m, 18 - 22 in-lb)2.27 - 3.05 N·m
(0.24 - 0.31 kg-m, 20 - 26 in-lb)
Maximum variation B 0.98 N·m (0.10 kg-m, 9.0 in-lb)
SGIA1185E

PS-28
POWER STEERING GEAR AND LINKAGE
Revision: 2007 April2007 M35/M45
19. Install large end of boot to gear housing assembly.
20. Install small end of boot to inner socket boot mounting groove.
21. Install boot clamp to boot small end.
22. Install large side of boot clamp.

Tighten large side of boot with boot clamp (stainless wire).

Wrap clamp around boot groove for two turns. Insert a flat-
bladed screwdriver in loops on both ends of wire. Twist 4 to
4.5 turns while pulling them with force of approximately 98 N
(10 kg, 22 lb).

Twist boot clamp as shown. Pay attention to relationship
between winding and twisting directions.

Twisted point of clamp is in the opposite side of adjusting
screw (1) as shown in the figure (to prevent contact with other
parts).
Measuring pointRack axial direction 5 mm (0.20 in) from housing end surface
Rack radial direction Axial direction of the adjusting screw
Vertical movement of rack 0.265 mm (0.0104 in)
SGIA1325E
Wire length L : 370 mm (14.57 in)
SGIA0163E
SGIA0164E
SGIA1186E

POWER STEERING GEAR AND LINKAGE
PS-29
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Revision: 2007 April2007 M35/M45

Bent cut end of the wire toward rack axial as shown in the fig-
ure after twisting the wire 4 to 4.5 turns so that cut end does
not contact with boot.
CAUTION:
Keep gap from cylinder tube 5 mm (0.20 in) or more.
23. Install cylinder tubes to gear housing assembly.
24. Adjust inner socket to standard length L, and then tighten lock
nut to the specified torque. Refer to PS-21, "
COMPONENTS" .
Check length of inner socket L again after tightening lock nut.
Make sure that the length is the standard.
CAUTION:
Adjust toe-in after this procedure. Length achieved after
toe-in adjustment is not necessary the above value.
SGIA0260J
Drive type 2WD AWD
Inner socket length L 63.9 mm (2.516 in) 55.2 mm (2.173 in)
SGIA0167E

PS-30
POWER STEERING OIL PUMP
Revision: 2007 April2007 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 176°F).
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 if the
relief oil pressure is outside the standard. Refer to PS-31, "
Dis-
assembly and Assembly (Models with VK45DE)" , PS-35, "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-16, "
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-39,
"HYDRAULIC LINE" .
6. Remove power steering oil pump mounting bolts, and then remove power steering oil pump. Refer to PS-
39, "Removal and Installation" .
INSTALLATION
Installation is the reverse order of removal. For tightening torque, refer to PS-39, "HYDRAULIC LINE" .

Perform the following procedure after installing.
–Adjust belt tension (VQ35DE). Refer to EM-16, "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

POWER STEERING OIL PUMP
PS-31
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Revision: 2007 April2007 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

PS-32
POWER STEERING OIL PUMP
Revision: 2007 April2007 M35/M45
DISASSEMBLY
NOTE:
Secure oil pump in a vise if necessary.
CAUTION:
Use copper plates when securing in a vise.
1. Remove rear cover mounting bolts, and then remove rear cover from body assembly.
2. Remove gasket from body assembly.
3. Remove dowel pin, cartridge and side plate from body assembly.
4. Remove pulley mounting nut and washer, then remove pulley from drive shaft.
5. Remove snap ring from drive shaft and press out it.
CAUTION:
When removing snap ring, be careful not to damage drive
shaft.
6. Remove oil seal from body assembly using a flat-bladed screw-
driver.
7. Remove O-ring from body assembly.
8. Remove lock nut, and then remove copper washer, joint and O-
ring.
9. Remove connector bolt, and then remove O-ring, flow control
valve and spring from body assembly
10. Remove mounting bolts of suction pipe, and then remove suc-
tion pipe from body assembly.
11. Remove O-ring from body assembly.
INSPECTION AFTER DISASSEMBLY
Body Assembly and Rear Cover Inspection
Check body assembly and rear cover for internal damage. Replace rear cover if it is damaged. Replace oil
pump assembly if body assembly is damaged.
Cartridge Assembly Inspection
Check cam ring, rotor and vane for damage. Replace cartridge assembly if there are.
Side Plate Inspection
Check side plate for damage. Replace side plate if there are.
Flow Control Valve Inspection
Check flow control valve and spring for damage. Replace if there are.
SST010B
SST034A