NISSAN 350Z 2007 Z33 Power Steering System Owner's Manual

POWER STEERING GEAR
PS-21
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PS
Revision: 2006 November2007 350Z
11. Heat rack Teflon ring to approximately 40°C (104°F) with a
dryer, then remove it and O-ring A from rack assembly.
CAUTION:
Be careful not to damage rack. If it is damaged, change to a
new one to avoid oil leaks.
12. 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, oil leaks will result.
INSPECTION AFTER DISASSEMBLY
Boot
Check boot for cracks and deformation. Replace it, if necessary.
Rack Assembly
Check rack for damage and wear. Replace it, if necessary.
Gear-sub Assembly

Check pinion gear for damage or wear. Replace if necessary.

Rotate pinion and check for torque variation or rattle. Replace if necessary.
Gear Housing Assembly
Check gear housing assembly for damage and scratches (inner wall). Replace it, if necessary.
Outer Socket and Inner Socket
Swing Torque

Hook a spring balance at the point shown in the figure. Confirm
if the reading is within the specification. When ball stud and
inner socket start moving the measured value must be within the
specification. If the reading is outside the specification, replace
socket.
SGIA0151E
SGIA0179E
SGIA0358E

PS-22
POWER STEERING GEAR
Revision: 2006 November2007 350Z
Specified value
Rotating Torque

Using a preload gauge (SST), check if reading is within the
value specified below. If the value is outside the standard,
replace outer sockets.
Axial End Play

Apply load of 490 N (50 kg,110 lb) to ball stud axially. Use a dial-
gauge to measure the amount of the movement that the stud
makes. Check if the reading is within the specified below. If the
value is outside the standard, replace outer and inner sockets.
ASSEMBLY
1. Apply recommended fluid to O-ring A. Put an O-ring A into rack Teflon ring.
NOTE:
Do not reuse O-ring A.
2. Heat rack Teflon ring to approximately 40°C (104°F) with a
dryer. Assemble it to mounting groove of rack.
NOTE:
Do not reuse rack Teflon ring.
Item Outer socket Inner socket
Measuring point Cotter-pin hole of stud shown as L: 48.5 mm (1.909 in)
Swing torque 0.3 - 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 - 69 in-lb)
Measuring value 4.42 - 42.7 N (0.5 - 4.4 kg, 1 - 10 lb) 10 - 78 N (1 - 8 kg, 2 - 18 lb)
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
SGIA1437E
SGIA0153E

POWER STEERING GEAR
PS-23
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Revision: 2006 November2007 350Z
3. To fit rack Teflon ring on rack, use rack Teflon ring installation
tool (SST) from tooth side. Compress rim of ring with the tool.
4. Apply Multi-purpose grease or equivalent to rack oil seal. Insert
rack oil seal, then insert rack to gear housing assembly.
NOTE:
Do not reuse rack oil seal.
CAUTION:

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

When unstring rack, do not damage cylinder inner wall. If
it is damaged, It may cause oil leaks. Replace gear hous-
ing assembly.

Attach rack oil seal. Both inner lip and outer lip should
face each other.
a. To avoid damaging inner rack oil seal, wrap an OHP sheet
[approximately. 70 mm (2.76 in) × 100 mm (3.94 in)] around rack
tooth. Place oil seal on sheet. Then, pull oil seal along with OHP
sheet until they pass the toothed section of rack, then remove it.
b. Insert rack oil seal (inner) to piston (rack Teflon ring) position
and push retainer to adjust screw side with fingers lightly, and
then make rack move in gear housing assembly, install rack oil
seal (inner) to fit in with gear housing assembly.
SGIA0154E
SGIA0205E
SGIA0155E
SGIA0548E

PS-24
POWER STEERING GEAR
Revision: 2006 November2007 350Z
c. When installing outer rack oil seal, cover the end of rack with an
OHP sheet [70 mm (2.76 in) × 100 mm (3.94 in)]. It will avoid
damaging rack oil seal. Then place oil seal on sheet. Pull rack oil
seal along with OHP sheet until they pass rack end. Then
remove OHP sheet.
d. Install end cover assembly to rack, move it to gear housing
assembly.
5. Using a 42 mm (1.65 in) open head (suitable tool), tighten end
cover assembly at the specified torque.
CAUTION:
Do not damage rack surface. If it is damaged, it may cause
oil leaks. Replace rack assembly.
6. After tightening end cover assembly, caulk cylinder at one point
as shown in the figure using a punch. This will prevent end cover
from getting loose.
7. Apply recommended fluid to O-ring B. Install O-ring B to gear
housing assembly.
NOTE:
Do not reuse O-ring B.
8. Install gear-sub assembly to gear housing assembly.
9. Decide neutral position of rack.
10. Install the projection part (Tip) of rear cover cap to gear-sub
assembly as shown in the figure.
SGIA0157E
SST081B
SGIA0158E
Rack stroke “L” : 64.5 mm (2.539 in)
SGIA0629J
SGIA1753E

POWER STEERING GEAR
PS-25
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PS
Revision: 2006 November2007 350Z
11. Apply thread locking adhesive (Three Bond 1111B or equivalent)
to the thread of adjusting screw to the adjusting screw height
from gear housing assembly. The adjusting screw height is the
same as it was measured in the overhaul in advance.
12. Rotate pinion ten times whole range of rack so that parts get to
fit with each other.
13. Measure pinion rotating torque within from –180° to + 180°
make preload gauge (SST) and torque adapter (SST) in rack
neutral position, then hold preload gauge (SST) at maximum
torque.
14. After loosening adjusting screw once, tighten it again with torque
of 4.9 - 5.9 N·m (0.50 - 0.60 kg-m, 44 - 52 in-lb). After that
loosen it within from 20° to 40°.
15. Measure pinion rotating torque with torque adapter (SST) and
preload gauge (SST), then confirm whether its reading is within
the specified value. If the reading is not within the specified
value, readjust screw angle with adjusting screw. Change gear
assembly to new one, if the reading is still not within the speci-
fied value or the rotating torque of adjusting screw is less than 5
N·m (0.51kg-m, 44 in-lb)
16. Turn pinion fully to the end of the left with tie-rods to rack.
17. Set dial gauge to rack as shown in the figure. 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 reading is within
the specified value. If reading is outside of the specification,
readjust screw angle with adjusting screw. If reading is still out-
side of specification, or if the rotating torque of adjusting screw is
less than 5 N·m (0.51 kg-m, 44 in-lb), replace steering gear
assembly.
SGIA0568E
SGIA0159E
Pinion rotation torque:
Around neutral position (within ±100°)
Average “A”:
1.71 - 2.34 N·m (0.18 - 0.23 kg-m, 16 - 20 in-lb)
Other than above (more than ±100°)
Maximum variation “B”:
2.3 N·m (0.23 kg-m, 20 in-lb)
SGIA0160E
SGIA0773E

PS-26
POWER STEERING GEAR
Revision: 2006 November2007 350Z
Specified value
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.
21. Install boot clamp to the large-diameter side of boot.
NOTE:
Do not reuse boot clamp.
a. Tighten large-diameter side of RH/LH boot with boot clamp
(stainless wire).
b. After wrapping clamp around boot groove for two turns, insert
screwdriver in loop on both ends of wire. Twist 4 to 4.5 turns
while pulling with a force of approx. 98 N (10 kg, 22 lb).
c. Twist boot clamp as shown in the figure, pay attention to rela-
tionship between winding and twisting directions.
d. Confirm the twisted point with clamp faces in the opposite direc-
tion to adjusting screw within 30° as shown in the figure.
Amount of vertical movement with rack Less than 0.265 mm (0.0104 in)
Measuring pointAxial direction of rack 5 mm (0.20 in) away from end of gear housing
Radius direction of rack Shaft direction of adjusting screw
SGIA0550E
Wire length “L” : 370 mm (14.57 in)
SGIA0163E
SGIA0164E
SGIA0361E

POWER STEERING GEAR
PS-27
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Revision: 2006 November2007 350Z
e. After twisting wire 4 to 4.5 turns, bend cut end of wire. Cut end of
wire should not touch boot. Be sure wire end is at least 5 mm
(0.20 in) away from clearance for tube.
22. Install cylinder tubes to gear housing assembly.
23. Tighten lightly inner socket in specified length “L”, then tighten
lock nut at specified torque. Refer to PS-19, "
COMPONENTS" .
Reconfirm if inner socket 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 value
given here.
SGIA0166E
SGIA0360E
Inner socket length “L” : 106.3 mm (4.19 in)
SGIA0167E

PS-28
POWER STEERING OIL PUMP
Revision: 2006 November2007 350Z
POWER STEERING OIL PUMPPFP:49110
On-Vehicle Inspection and ServiceNGS0000H
CHECKING RELIEF OIL PRESSURE
CAUTION:
Before starting work, confirm belt tension is proper.
1. Connect oil pressure gauge (SST) and oil pressure gauge
adapter (SST) 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 to 80°C (122 to 176°F).
CAUTION:

Warm up engine with shut-off valve fully opened. If
engine is started with shut-off valve closed, fluid pres-
sure 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-29, "Dis-
assembly and Assembly" .
5. After inspection, disconnect oil pressure gauge (SST) and oil pressure gauge adapter (SST) from hydrau-
lic circuit, connect 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 InstallationNGS0000I
REMOVAL
1. Remove engine cover.
2. Remove air cleaner box.
3. Drain water from radiator upper tank, then remove radiator upper hose.
4. Remove radiator fan shroud. Refer to CO-13, "
Removal and Installation" .
SGIA0814E
Relief oil pressure:
9,600 - 10,200 kPa (97.9 - 104 kg/cm
2 , 1,392 - 1,479 psi)
SGIA0813E

POWER STEERING OIL PUMP
PS-29
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PS
Revision: 2006 November2007 350Z
5. Loosen idler pulley, then remove belt.
6. Drain power steering fluid from reservoir tank.
7. Remove piping of high pressure and low pressure (drain fluid
from their pipings)
8. Remove bolt common to water pump and power steering pump.
9. Remove bolt then remove power steering pump.
INSTALLATION
Refer to PS-33, "HYDRAULIC LINE" for tightening torque. Install in the reverse order of removal.

After installation, adjust belt tension. Refer to EM-12, "DRIVE BELTS" .

After installation, bleed air. Refer to PS-6, "Air Bleeding Hydraulic System" .
Disassembly and AssemblyNGS0000J
COMPONENTS
SGIA0376E
1. Plug 2. O-ring D 3. Flow control valve spring
4. Relief valve assembly 5. Flow control valve assembly 6. Shaft kit
7. Oil seal 8. Bracket 9. Body assembly
10. Suction connector assembly 11. O-ring E 12. O-ring C
13. O-ring B 14. Cartridge assembly 15. O-ring A
16. Cover assembly 17. Side plate 18. Vane
19. Rotor snap ring 20. Cam ring 21. Rotor
22. Dowel pin
SGIA0774E

PS-30
POWER STEERING OIL PUMP
Revision: 2006 November2007 350Z
INSPECTION BEFORE DISASSEMBLY
Disassemble power steering oil pump only if the following items are
found.

Oil leakage from oil pump

Deformed or damaged pulley

Poor performance
DISASSEMBLY
NOTE:
Fix oil pump in vise as the occasion demands.
CAUTION:
When retaining drive shaft in a vise, always use copper or aluminium plates between vise and shaft.
1. Unscrew two front bracket bolts and remove bracket from body assembly.
2. Unscrew four cover assembly bolts and remove cover assembly from body assembly.
3. Remove O-ring A from body assembly.
4. Remove rotor snap ring with snap ring pliers, and remove shaft
kit from body assembly.
CAUTION:
When removing rotor snap ring, be careful not to damage
pulley shaft of shaft kit.
5. Using a screwdriver, remove oil seal for body assembly.
6. Remove cam ring, rotor, vane, side plate, O-ring B and O-ring C
from body assembly.
7. Remove plug, then remove O-ring D, flow control valve spring,
relief valve assembly and flow control value assembly from body
assembly.
CAUTION:
Be careful not to drop and deform relief valve assembly and
flow control valve assembly.
8. Remove fixing bolt of suction connector assembly, then remove
suction connector assembly and O-ring E from body assembly.
INSPECTION AFTER DISASSEMBLY
Body Assembly and Cover Assembly Inspection

Check body assembly and cover assembly for damage. If any damage is found, replace with new part for
cover assembly, 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.
Relief Valve Assembly Inspection

Check relief valve assembly for damage. If any damage is found, replace it with new one.
SGIA0170E
SGIA0059E
SST034A