check oil NISSAN 350Z 2007 Z33 Power Steering System Workshop Manual

PS-1
POWER STEERING SYSTEM
G STEERING
CONTENTS
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Revision: 2006 November2007 350Z
POWER STEERING SYSTEM
PRECAUTIONS .......................................................... 2
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 2
Precautions for Battery Service ................................ 2
Precautions for Steering System .............................. 2
PREPARATION ........................................................... 3
Special Service Tools ............................................... 3
Commercial Service Tools ........................................ 4
NOISE, VIBRATION AND HARSHNESS (NVH)
TROUBLESHOOTING ................................................ 5
NVH Troubleshooting Chart ..................................... 5
POWER STEERING FLUID ........................................ 6
Checking Fluid Level ................................................ 6
Checking Fluid Leakage ........................................... 6
Air Bleeding Hydraulic System ................................. 6
STEERING WHEEL .................................................... 7
On-Vehicle Inspection and Service .......................... 7
CHECKING CONDITION OF INSTALLATION ...... 7
CHECKING STEERING WHEEL PLAY ................ 7
CHECKING NEUTRAL POSITION ON STEER-
ING WHEEL .......................................................... 7
CHECKING STEERING WHEEL TURNING
FORCE .................................................................. 7
CHECKING FRONT WHEEL TURNING ANGLE ..... 8
Removal and Installation .......................................... 9
REMOVAL ............................................................. 9
INSTALLATION ..................................................... 9
STEERING COLUMN ............................................... 10
Removal and Installation ........................................ 10
COMPONENTS .................................................. 10
REMOVAL ........................................................... 10
INSPECTION AFTER REMOVAL ....................... 13
INSTALLATION ................................................... 13INSPECTION AFTER INSTALLATION ................ 14
Disassembly and Assembly .................................... 15
COMPONENTS ................................................... 15
DISASSEMBLY ................................................... 15
INSPECTION AFTER DISASSEMBLY ................ 16
ASSEMBLY ......................................................... 16
POWER STEERING GEAR AND LINKAGE ............ 17
Removal and Installation ........................................ 17
COMPONENTS ................................................... 17
REMOVAL ........................................................... 17
INSTALLATION ................................................... 18
POWER STEERING GEAR ...................................... 19
Disassembly and Assembly .................................... 19
COMPONENTS ................................................... 19
DISASSEMBLY ................................................... 20
INSPECTION AFTER DISASSEMBLY ................ 21
ASSEMBLY ......................................................... 22
POWER STEERING OIL PUMP ............................... 28
On-Vehicle Inspection and Service ......................... 28
CHECKING RELIEF OIL PRESSURE ................ 28
Removal and Installation ........................................ 28
REMOVAL ........................................................... 28
INSTALLATION ................................................... 29
Disassembly and Assembly .................................... 29
COMPONENTS ................................................... 29
INSPECTION BEFORE DISASSEMBLY ............. 30
DISASSEMBLY ................................................... 30
INSPECTION AFTER DISASSEMBLY ................ 30
ASSEMBLY ......................................................... 31
HYDRAULIC LINE .................................................... 33
Removal and Installation ........................................ 33
SERVICE DATA AND SPECIFICATIONS (SDS) ...... 35
Steering Wheel ....................................................... 35
Steering Angle ........................................................ 35
Steering Column ..................................................... 35
Steering Outer Socket and Inner Socket ................ 35
Steering Gear ......................................................... 36
Oil Pump ................................................................. 36
Steering Fluid .......................................................... 36

PS-6
POWER STEERING FLUID
Revision: 2006 November2007 350Z
POWER STEERING FLUIDPFP:KLF20
Checking Fluid LevelNGS00007

Stop engine before performing a fluid level check.

Ensure that fluid level is between the MAX range and MIN level.

Because fluid level differs within the HOT range and the COLD
range, check it carefully.
CAUTION:

Do not overfill the MAX level.

Do not reuse any used power steering fluid.
Checking Fluid LeakageNGS00008
Check that hydraulic piping lines for improper attachment and for
leaks, cracks, damage, loose connections, chafing or deterioration.
1. Run engine until fluid temperature reaches 50 to 80° C (122 to
176°F) in reservoir tank. Keep engine speed idle.
2. Turn steering wheel right-to-left several times.
3. Hold steering wheel at each “lock” position for five seconds to
check fluid leakage.
CAUTION:
Do not hold steering wheel in a locked position for more
than 10 seconds. (There is the possibility that oil pump may
be damaged.)
4. If fluid leakage at connections is noticed, then loosen flare nut and then retighten. Do not over tighten con-
nector as this can damage O-ring, washer and connector.
5. If fluid leakage at the connectors is noticed, then loosen the flare nut and retighten it.
6. Check steering gear boots for accumulation of fluid indicating a from steering gear.
Air Bleeding Hydraulic SystemNGS00009
Incomplete air bleeding causes the following. When this happens, bleed air again.

Generation of air bubbles in reservoir tank

Generation of clicking noise in oil pump

Excessive buzzing in oil pump
NOTE:
When vehicle is stationary or while steering wheel is being turned slowly, some noise may be heard from
oil pump or gear. This noise is normal and does not affect any system.
1. Stop engine, and then turn steering wheel fully to right and left several times.
CAUTION:
Do not allow steering fluid reservoir tank to go below the low-level line. Check tank frequenter and
add fluid as needed.
2. Run engine at idle speed. Turn steering wheel fully to the right and then fully to the left, and keep for about
three seconds. Then check whether a fluid leakage has occurred.
3. Repeat the 2nd procedure several times at about three seconds intervals.
CAUTION:
Do not hold steering wheel in the locked position more than 10 seconds. (There is the possibility
that oil pump may be damaged.)
4. Check generation of air bubbles and cloud in fluid.
5. If air bubbles and the cloud don't fade, stop engine, hold air bleeding until air bubbles and the cloud fade.
Perform the 2nd and the 3rd procedures again.
6. Stop engine, check fluid level.HOT : Fluid temperatures from 50 to 80 °C (122 to
176°F)
COLD : Fluid temperatures from 0 to 30°C (32 to 86°F)
SGIA0232J
SST836C

STEERING WHEEL
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Revision: 2006 November2007 350Z
STEERING WHEELPFP:48430
On-Vehicle Inspection and ServiceNGS0000A
CHECKING CONDITION OF INSTALLATION

Check installation condition of steering gear assembly, front sus-
pension, axle and steering column.

Check if movement exists when steering wheel is moved up and
down, to the left and right and to the axial direction.

Check if the mounting bolts for steering gear assembly are loose
or not. Refer to PS-17, "
POWER STEERING GEAR AND LINK-
AGE" .
CHECKING STEERING WHEEL PLAY
1. Set tires to the straight ahead, start engine, then turn steering wheel to the left and right lightly, and mea-
sure steering wheel movement on the outer circumference when steering wheel is turned up to the point
where tires start moving.
CHECKING NEUTRAL POSITION ON STEERING WHEEL

Check neutral position on steering wheel after confirming that front wheel alignment is correct. Refer to
PS-35, "
SERVICE DATA AND SPECIFICATIONS (SDS)" .
1. Set the vehicle to the straight ahead-direction, check if steering wheel is in the neutral position.
2. If it is not in the neutral position, remove steering wheel and reinstall it correctly.
3. If the neutral position cannot adjust in the two teeth of steering gear assembly, loosen tie-rod lock nuts of
steering outer sockets, then adjust tie-rods by the same amount in the opposite direction.
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 176°F).]
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-28,
"CHECKING RELIEF OIL PRESSURE" .
a. Disconnect lower joint and steering knuckle from steering gear assembly. Refer to PS-17, "
Removal and
Installation" , FA X - 4 , "Removal and Installation" .
b. Start and run engine at idle to make sure steering fluid has reached normal operating temperature.End play of the axle direction for steering wheel:
0 mm (0 in)
SGIA0348E
Steering wheel play on the outer circumference : 0 - 35 mm (0 - 1.38 in)
Steering wheel turning
force: 7.45 N·m (0.76 kg-m, 66 in-lb)
SGIA1136E

POWER STEERING GEAR
PS-21
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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-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

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

POWER STEERING OIL PUMP
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Revision: 2006 November2007 350Z
Flow Control Valve Assembly Inspection

Check flow control valve assembly for damage. If any damage is found, replace it with new one.
ASSEMBLY
NOTE:
Fix oil pump in vise as occasion demands.
CAUTION:
When retaining drive shaft in a vise, always use copper or aluminium plates between vise and shaft.
1. Apply a coat of Multi-purpose grease or equivalent to oil seal lip
and to the circumference of oil seal. Using proper tool such as
hand press machine, install it to the body assembly.
NOTE:
Do not reuse oil seal.
2. Install shaft kit to body assembly.
3. Apply recommended fluid to O-ring B and O-ring C, then install
O-ring B and O-ring C to body assembly.
NOTE:
Do not reuse O-ring B and O-ring C.
4. Set dowel pin at the illustration position (The position is the
same regardless of right or left direction), and install side plate to
body assembly.
5. Install cam ring on side plate as follows;

Turn chamfered edge side of cam ring to side plate as shown
in the figure.

Position large chamfered side of cam ring as shown in the fig-
ure.
SST038A
SGIA0171E
SGIA0172E
SGIA0173E