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POWER STEERING SYSTEM
G STEERING

PS A

SECTION

POWER STEERING SYSTEM C

CONTENTS

PRECAUTIONS ......................................................... 2 Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER" ................................................................. 2 Precautions for Steering System ............................. 2
PREPARATION .......................................................... 3 Special Service Tools (SST) .................................... 3
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 STEERING WHEEL ......................................................... 7 CHECKING STEERING WHEEL TURNING FORCE ................................................................. 7 CHECKING FRONT WHEEL TURNING ANGLE..... 8 Removal and Installation ......................................... 9 REMOVAL ............................................................ 9 INSTALLATION .................................................... 9 STEERING COLUMN ...............................................11 Removal and Installation ........................................11 COMPONENT .....................................................11 REMOVAL OF LOWER SHAFT AND HALL COVER ...............................................................11 INSTALLATION OF LOWER JOINT AND HALL COVER .............................................................. 12 REMOVAL OF STEERING COLUMN ................ 12 INSPECTION AFTER REMOVAL ...................... 12 INSTALLATION OF STEERING COLUMN ........ 12

INSPECTION AFTER INSTALLATION ............... 13 F

Disassembly and Assembly ................................... 13

DISASSEMBLY .................................................. 13

ASSEMBLY ........................................................ 14 PS POWER STEERING GEAR AND LINKAGE ........... 15

Removal and Installation ....................................... 15

REMOVAL .......................................................... 15 INSTALLATION .................................................. 15

INSPECTION AFTER INSTALLATION ............... 16

Component ............................................................ 17 Disassembly and Assembly ................................... 18 I

DISASSEMBLY .................................................. 18

INSPECTION AFTER DISASSEMBLY ............... 19

ASSEMBLY ........................................................ 21 J

POWER STEERING OIL PUMP .............................. 26

On-Vehicle Inspection and Service ........................ 26

CHECKING RELIEF OIL PRESSURE ............... 26 K Removal and Installation ....................................... 26

REMOVAL .......................................................... 26

INSTALLATION .................................................. 26 Disassembly and Assembly ................................... 27 L

INSPECTION BEFORE DISASSEMBLY ............ 27

DISASSEMBLY .................................................. 27

INSPECTION AFTER DISASSEMBLY ............... 28 M

ASSEMBLY ........................................................ 29

HYDRAULIC LINE ................................................... 31

Components .......................................................... 31

Removal and Installation ....................................... 32

SERVICE DATA AND SPECIFICATIONS (SDS) ..... 33

Steering Wheel ...................................................... 33

Steering Angle ....................................................... 33

Steering Column .................................................... 33

Steering Outer Socket and Inner Socket ............... 33

Steering Gear ........................................................ 34

Oil Pump ................................................................ 34

Steering Fluid ......................................................... 34

Edition; 2004 May

PS-1

2005 Q45

PRECAUTIONS

PFP:00001

Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT

BELT PRE-TENSIONER"

EGS000FJ

The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted. Information necessary to service the system safely is included in the SRS and SB section of this Service Manual.
WARNING: q To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be performed by an authorized NISSAN/INFINITI dealer.
q Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag Module, see the SRS section.
q Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness connectors.

Precautions for Steering System

EGS00087

q In case of removing steering gear, make the final tightening with grounded and unloaded vehicle condition, and then check wheel alignment.
q Observe the following precautions when disassembling. Before disassembly, thoroughly clean the outside of the unit. Disassembly should be done in a clean work area. It is important to prevent the internal parts from becom-
ing contaminated by dirt or other foreign matter. For easier and proper assembly, place disassembled parts in order on a parts rack. Use nylon cloth or paper towels to clean the parts; common shop rags can leave lint that might interfere
with their operation. Do not reuse non-reusable parts. Before assembling, apply the specified grease to the directed parts.

Edition; 2004 May

PS-2

2005 Q45

PREPARATION

PREPARATION Special Service Tools (SST)

PFP:00002
A
EGS0006V

The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.

Tool number (Kent - Moore No.)

B
Description

Tool name

ST27180001 (J25726 -A) Steering wheel puller

HT72520000 (J25730-A) Ball joint remover a: 33 mm (1.30 in) b: 50 mm (1.97 in) c: 11.5 mm (0.453 in)
ST3127S000 (See J25765 - A) Preload gauge 1.GG9103000.
(J25765 - A) Torque wrench 2.HT62940000
( ) Socket adapter 3.HT62900000
( ) Socket adapter

KV48104400

(

)

Teflon ring correcting tool

Removing of steering wheel

S-NT544

F
Removing steering outer socket

NT546

Inspection of sliding torque, steering torque, and rotating torque for ball joint

S-NT541

K
Installation of rack Teflon ring
L

S-NT550
M

KV48103404 ( ) Torque adapter

Inspection rotating torque

ZZA0824D

Edition; 2004 May

PS-3

2005 Q45

Tool number (Kent - Moore No.) Tool name
KV48103500 (J26357 and J26357-10) Pressure gauge
KV4802500 (J33914) Pressure gauge adapter

PREPARATION
Description

S-NT547

Measurement oil pump relief pressure

S-NT542

Measurement oil pump relief pressure

Edition; 2004 May

PS-4

2005 Q45

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING NVH Troubleshooting Chart

Use the chart below to help you find the cause of the symptom. If necessary, repair or replace these parts. B

Reference page

H
Possible cause and SUSPECTED PARTS
I

Symptom STEERING ×: Applicable

Edition; 2004 May

Noise Shake Vibration Shimmy Judder

× × ××××× × ×

Fluid level

PS-6

Air in hydraulic system

PS-6

Outer socket ball joint swinging force

PS-20

Outer socket ball joint rotating torque

PS-20

PS-5

Outer socket ball joint end play

PS-20

Steering gear fluid leakage

PS-6

Steering wheel play

PS-7

Steering gear rack sliding force

Drive belt looseness

EM-13

×××

×××××

×××

Improper steering wheel

Improper installation or looseness or tilt lock lever

PS-12

Mounting rubber deterioration

Steering column deformation or damage

PS-13

Improper installation or looseness of steering column

PS-11

Steering linkage looseness

PS-15

× × × × ×× ×

PROPELLER SHAFT

NVH in PR section

DIFFERENTIAL

NVH in RFD section

PFP:00003
A
EGS00081

× × ×× ×

××

×××

AXLE AND SUSPENSION

NVH in FAX, RAX, FSU and RSU section

TIRES

NVH in WT section

2005 Q45

ROAD WHEEL

NVH in WT section

DRIVE SHAFT

NVH in RAX section

×M

BRAKES

NVH in BR section

POWER STEERING FLUID

PFP:KLF20

Checking Fluid Level

EGS0006W

q Stop engine before performing a fluid level check.
q Ensure that fluid level is between the MAX range and MIN level. q Because fluid level differs within the HOT range and the COLD
range, check it carefully.

HOT COLD

: Fluid temperatures from 50 to 80°C (122 to 176°F)
: Fluid temperatures from 0 to 30°C (32 to 86°F)

CAUTION: q Do not overfill the Max level.
q Do not reuse any used power steering fluid.
q Recommended fluid is Genuine NISSAN PSF or equivalent.

PGIA0007J

Checking Fluid Leakage

EGS0006X

Check the hydraulic piping lines for improper attachment and for leaks, cracks, damage, loose connections, chafing or deterioration.

1. Run engine until fluid temperatures 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.)

SST836C

4. If fluid leakage at connections is noticed, then loosen flare nut and then retighten. Do not over tighten connector as this can damage O-ring, washer and connector.

5. If fluid leakage from oil pump is noticed, check oil pump. Refer to PS-26, "POWER STEERING OIL PUMP" .

6. Check steering gear boots for accumulation of fluid indicating a from steering gear.

Air Bleeding Hydraulic System

EGS0006Y

Incomplete air bleeding causes the following. When this happens, bleed air again.
q Generation of air bubbles in reservoir tank.
q Generation of clicking noise in oil pump.
q 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 in a reservoir tank to go below the low-level line. Check tank frequently 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. (Three is the possibility that oil pump may be damaged.)
4. Check generation of air bubbles and cloud in fluid.

Edition; 2004 May

PS-6

2005 Q45

STEERING WHEEL

STEERING WHEEL
On-Vehicle Inspection and Service
CHECKING CONDITION OF INSTALLATION

PFP:48430
A
EGS0006Z

q Check installation condition of steering gear assembly, front suspension, axle and steering column.

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

direction.

End play of the axial direction for steering wheel : 0 mm (0 in)

q Check if the mounting bolts for steering gear assembly are loose or not. Refer to PS-15, "POWER

STEERING GEAR AND LINKAGE" . D
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.

Steering wheel play on the outer circumference : 0 35 mm (0 1.38 in)

CHECKING NEUTRAL POSITION ON STEERING WHEEL

Check neutral position on steering wheel after confirming that front wheel alignment is correct. Refer to FSU-

5, "Wheel Alignment Inspection" .

1. Set vehicle to the straight 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 within the two teeth of steering gear assembly, loosen outer socket lock nuts of steering outer sockets, then adjust outer socket 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).]

Tires need to be inflated normal pressure.

4. Check steering wheel turning force when steering wheel has

been turned 360° from neutral position.

Steering wheel turning force : 36 N (3.7kg, 8.2lb) or less
5. If steering wheel turning force is out of the specification, check rack sliding force.
a. Disconnect steering column lower joint and knuckle arms from gear.
b. Start and run engine at idle to make sure steering fluid has reached normal operating temperature.

L M
SST491B

c. While pulling outer socket slowly in the ±11.5 mm (±0.453 in) range from neutral position, make sure rack sliding force is within the specification.
Rack sliding force : 255- 294 N (26-30 kg, 57 - 66 lb)
d. Check sliding force outside above the range.
Rack sliding force : Not more than 294 N (30kg, 66lb)
e. If rack sliding force is not within specification, overhaul steering gear assembly.

SST090B

Edition; 2004 May

PS-7

2005 Q45

STEERING WHEEL
CHECKING FRONT WHEEL TURNING ANGLE Check front wheel turning angle after the toe-in inspection. Place front wheels on turning radius gauges and rear wheels on stands so that vehicle can be level. Check the maximum inner and outer wheel turning angles for LH and RH road wheels.
q Start engine and run at idle, turn steering wheel all the way right and left, measure the turning angle. Inner wheel (Angle: A) Minimum : 39°45 (39.75°) Nominal : 42°45 (42.75°) Maximum : 43°45 (43.75°) Outer wheel (Angle: B) Nominal : 33°50(33.83°)
q If it is not within the specification, measure the rack stroke. Rack stroke : 68.5 mm (2.697 in)
q If the rack stroke is outside of the specification, disassemble steering gear to check rack stroke.
q Turning angles are not adjustable. If any of steering angles is not within the specification, check following components for wear or damage.
Steering gear Steering column Front suspension components

SMA127 SGIA0055E SST307BA

Edition; 2004 May

PS-8

2005 Q45

STEERING WHEEL
Removal and Installation
REMOVAL 1. Remove driver air bag module. Refer to SRS-39, "DRIVER AIR
BAG MODULE" . 2. Remove horn connector. 3. Remove steering wheel mounting nut and then paint mating
marks on the top of column shaft and steering wheel.
4. Remove steering wheel with steering wheel puller (SST).
INSTALLATION Paying attention to the following items, install in the reverse order of the removal. q Align spiral cable correctly when installing steering wheel.
a.Set the front wheels in the straight-ahead position. b.Make sure that spiral cable is in neutral position. The neutral position is detected by turning left about 2.5 or 3.5 revolutions from right end position. Align the two marks( ). (The spiral cable can be turned up to about 2.5 or 3.5 turns from neutral position to both right and left. The number of turns depends on spiral cable type. Always confirm the number indicated on the caution label attached to spiral cable before starting work.) q Always work from side of air bag module.

EGS00070
A

D
SBF812E
E

F PS

SST818C

I J

K L

SRS230

Edition; 2004 May

PS-9

2005 Q45

STEERING WHEEL
Place combination switch assembly with the L-mark side facing down.
Align the protruding portions of combination switch assembly with their corresponding holes in steering wheel, then install steering wheel. Refer to the figure at right.

SST687C SST688C

Edition; 2004 May

PS-10

2005 Q45

STEERING COLUMN
Removal and Installation
COMPONENT

STEERING COLUMN

PFP:48810
A
EGS00071
B

1. Driver air bag module 4. Column cover 7. Upper joint 10. Lower joint

2. Steering wheel 5. Steering column assembly 8. Hole cover 11. Rid

3. Spiral cable 6. Collar 9. Lower shaft

K
SGIA0830E
L

CAUTION:

q Care must be taken not to give axial impact to steering column assembly during removal and

installation.

q Care must be taken not to move steering gear during removal of steering column assembly.

REMOVAL OF LOWER SHAFT AND HALL COVER 1. Set vehicle to the straight ahead-direction. 2. Remove pinch bolt at lower-side of lower joint. 3. Loosen pinch bolt at lower shaft-side of upper joint. 4. Remove cooler, mounting bolt and nut at steering column assembly-side of upper joint. 5. Remove hall cover mounting nuts, and remove upper joint, lower joint, lower shaft and hall cover from
vehicle. 6. Remove fixing bolt and remove lower joint from lower shaft. 7. Remove fixing bolt and remove upper joint from lower shaft. 8. Remove lower shaft from hall cover.

Edition; 2004 May

PS-11

2005 Q45

STEERING COLUMN

INSTALLATION OF LOWER JOINT AND HALL COVER

q Refer to PS-11, "Removal and Installation" for tightening torque. Install in the reverse order of the removal.

q After removing/installing or replacing steering components, check wheel alignment. Refer to FSU-5, "Wheel Alignment Inspection" .

q After adjusting wheel alignment, adjust neutral position of steering angle sensor. Refer to BRC-6, "Adjustment of Steering Angle Sensor Neutral Position" .

q Install lower joint to power steering gear assembly in the following procedure.

Set rear cover cap projection into slot A in the gear sub-assembly.

Lock steering wheel by turning steering wheel clockwise by 60° from neutral position.

Install lower joint to power steering gear while keeping position shown at steps 1 and 2. Keep slit in lower section of lower joint off rear cover cap projection.

Unlock steering and set steering wheel in the neutral position.

Check that rear cover cap projection is correctly positioned relative to slot A in the gear sub-assembly as shown in the illustration.

PGIA0008E

REMOVAL OF STEERING COLUMN 1. Set vehicle to the straight ahead-direction. 2. Remove steering wheel. Refer to PS-7, "STEERING WHEEL" . 3. Remove column cover, steering lock escutcheon, and driver-side instrument lower driver panel. Refer to
IP-10, "INSTRUMENT PANEL ASSEMBLY" . 4. Remove combination switch & spiral cable. Refer to SRS-42, "SPIRAL CABLE" . 5. Loosen fixing bolt at lower shaft-side of upper joint. 6. Remove collar, mounting bolt and nut at steering column-side of upper joint. Then remove upper joint from
steering column assembly. 7. Disconnect harness connector from each switch on steering column shaft, then separate vehicle side har-
ness from it. 8. Remove steering column assembly from vehicle.

INSPECTION AFTER REMOVAL
q Check if there is something wrong with jacket tube of steering column assembly and collar etc. And then if they are damaged, replace with new one.
q If vehicle has a minor collision, check column length "L1 , L2 " as shown in the figure. Then if it is out of the specified value, replace with new one.

Steering column length "L1 "
Steering column lower shaft length "L2 "

: 643 mm (25.31 in) : 379.8 mm (14.95 in)

SST315B
INSTALLATION OF STEERING COLUMN q Refer to PS-11, "Removal and Installation" for tightening torque. Install in the reverse order of the
removal. NOTE: Refer to component parts location and do not reuse non-reusable parts. q After removing/installing or replacing steering components, check wheel alignment. Refer to FSU-5, "Wheel Alignment Inspection" .

Edition; 2004 May

PS-12

2005 Q45

STEERING COLUMN

q After adjusting wheel alignment, adjust neutral position of steering angle sensor. Refer to BRC-6, "Adjust-

ment of Steering Angle Sensor Neutral Position" .

INSPECTION AFTER INSTALLATION

q After installing steering column to vehicle, check tilt device and

its operation range. Ranges of operation are shown in the figure.

q Check if steering wheel operation can turn to the end of the left and right smoothly. C

Disassembly and Assembly
DISASSEMBLY

SGIA0053E

EGS00072

1. Upper jacket tube 4. Steering column upper shaft 7. Telescopic motor 10. Bracket 13. Mounting nut

2. Tilt motor 5. Tilt lever 8. Telescopic sensor 11. Jacket tube

Edition; 2004 May

PS-13

3. Tilt sensor 6. Spring 9. Snap ring 12. O-ring

PGIA0002E
2005 Q45

STEERING COLUMN
Steering Column 1. Remove tilt motor and sensor from jacket tube. 2. Remove telescopic motor and sensor from jacket tube. 3. Remove snap ring from steering column upper shaft. 4. Remove upper jacket tube. 5. Remove mounting nuts, and remove steering column upper shaft from jacket tube. Steering Lock 1. Break self-shear type screws with a drill or other appropriate
tool. 2. Install new self-shear type screws and then cut off self-shear
type screw heads.
SST678C
ASSEMBLY Refer to PS-13, "Disassembly and Assembly" for tightening torque. Install in the reverse order of disassembly.

Edition; 2004 May

PS-14

2005 Q45

POWER STEERING GEAR AND LINKAGE
POWER STEERING GEAR AND LINKAGE Removal and Installation

PFP:49001
A
EGS00073
B

SGIA0831E

1. Rack mounting bracket

2. Rack mounting insulator

3. Steering gear assembly

4. Lower joint

5. EPS solenoid valve

6. Cotter pin

CAUTION:

Spiral cable may snap due to steering operation if steering column is separated from steering gear

assembly. Therefore fix steering wheel with a string to avoid turns.

REMOVAL

1. Set wheels in the straight-ahead position.

2. Remove tires from vehicle with power tool.

3. Remove undercover with power tool.

4. Remove cotter pin at steering outer socket, then loosen mounting nut.

5. Use a ball joint remover (SST: HT72520000 {J25730-A}) to remove steering outer socket from steering

knuckle. Be careful not to damage ball joint boot.

CAUTION: Tighten temporarily mounting nut to prevent damage to threads and to prevent ball joint remover

(SST) from coming off.

6. Remove oil pipings (high pressure side and low pressure side) from steering gear assembly, then drain

fluid from pipings.

7. Remove fixing bolt on lower side of lower joint.

8. Loosen fixing bolt on upper side of lower joint.

9. Remove mounting bolts of steering gear assembly with power tool, and then remove rack mounting bracket, rack mounting insulator.

10. Disconnect EPS solenoid valve connector.

11. Remove steering gear assembly from vehicle.

INSTALLATION
q Refer to PS-15, "Removal and Installation" for tightening torque. Install in the reverse order of removal.
NOTE: Refer to component parts location and do not reuse non-reusable parts.
q After removing/installing or replacing steering components, check wheel alignment. Refer to FSU-5, "Wheel Alignment Inspection" .
q After adjusting wheel alignment, adjust neutral position of steering angle sensor. Refer to BRC-6, "Adjustment of Steering Angle Sensor Neutral Position" .

Edition; 2004 May

PS-15

2005 Q45

POWER STEERING GEAR AND LINKAGE

q After installation, bleed air from piping. Refer to PS-6, "Air Bleeding Hydraulic System" .
q Follow the procedure below to install lower joint to power steering gear:
1. Set rear cover cap projection into slot A in the gear sub-assembly.
2. Lock steering wheel by turning steering wheel clockwise by 60° from neutral position.
3. Install lower joint to power steering gear while keeping position shown at steps 1 and 2. Keep slit in lower section of lower joint off rear cover cap projection.
4. Unlock steering and set steering wheel in the neutral position.
5. Check that rear cover cap projection is correctly positioned relative to slot A in the gear sub-assembly as shown in the illustration.

PGIA0008E

INSPECTION AFTER INSTALLATION Check if steering wheel turns smoothly when it is turned several times fully to the end of the left and right.

Edition; 2004 May

PS-16

2005 Q45

Component

POWER STEERING GEAR AND LINKAGE

EGS00074
A B C D E F PS H I J K L M

Edition; 2004 May

PS-17

SGIA0832E
2005 Q45

POWER STEERING GEAR AND LINKAGE

1. Outer socket 4. Spacer ring 7. Boot clamp 10. O-ring 13. Gear housing assembly 16. Lock nut 19. Retainer 22. Pinion Teflon ring 25. EPS solenoid valve

2. Inner socket 5. Boot clamp 8. End cover assembly 11. Rack Teflon ring 14. Cylinder tube 17. Adjusting screw 20. O-ring 23. Rear housing assembly 26. O-ring

CAUTION: q Disassemble and assemble steering gear by securing the
mounting area in a vise using copper plates.
q Clean steering gear with kerosene before disassembling. Be careful to avoid splashing or applying any kerosene over connector of discharge port or return port.

3. Lock plate 6. Boot 9. Rack oil seal 12. Rack assembly 15. Washer 18. Spring 21. Pinion 24. Rear cover cap 27. Gear sub assembly

Disassembly and Assembly
DISASSEMBLY 1. Remove EPS solenoid valve.
CAUTION: Do not attempt to disassemble EPS solenoid valve.
2. Remove cylinder tubes from gear housing assembly.
3. Remove rear cover cap from gear sub assembly.
4. Measure adjusting screw height from gear housing assembly, then loosen lock nut.
5. Remove adjust screw, spring and retainer from gear housing assembly.
6. Remove mounting bolts of gear sub assembly, then remove gear sub assembly from gear housing assembly.
CAUTION: Do not overhaul gear sub assembly because it is non overhaul part. If there is something wrong with gear sub-assembly, change it to new one.
7. Remove O-ring from gear housing assembly.
8. Loosen lock nut of outer socket, and remove outer socket.

9. Remove boot clamps of the small side and the large side, then remove boots.
CAUTION: When removing boots, be careful not to damage inner socket and gear housing assembly. If they are damaged, change them to avoid oil leaks.
10. Move spacer ring to rack assembly side, raise clinching part (at two points of part A) of lock plate and loosen inner socket, then remove inner socket from rack assembly.
CAUTION: When removing lock plate, be careful not to damage the surface of rack assembly. If damaged rack assembly sur-

Edition; 2004 May

PS-18

SGIA0056E EGS00075
SGIA0018E
SGIA0363E
2005 Q45

POWER STEERING GEAR AND LINKAGE

face will cause an oil leak. Therefore, if the rack assembly surface is damaged, replace rack

assembly.

11. Drill out the clinching part of cylinder outer rim with a 3 mm (0.12 in) drill in 1.5 mm (0.059 in) depth.

12. Remove end cover assembly with a open head (suitable tool). CAUTION: Be careful not to damage rack assembly. If it is damaged, replace rack assembly. Otherwise, oil leaks may result.
13. Pull rack assembly with rack oil seal out of gear housing assembly. CAUTION: Be careful not to damage cylinder. If it is damaged, replace gear housing assembly. Otherwise, oil leaks may result.
14. Heat rack Teflon ring to approximately 40°C (104°F) with a dryer, then remove it and O-ring from rack. CAUTION: Be careful not to damage rack. If it is damaged, change to a new one to avoid oil leaks.

D
STC0013D
E

F PS

SST081B

I J

15. 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 cylinder inner wall. If it is damaged, gear housing assembly must be replaced. Otherwise, oil leaks will result.

K
SGIA0151E
L
M

INSPECTION AFTER DISASSEMBLY Boot Check boot for cracks and deformation. Replace it, if there are.
Rack Check rack for damage and wear. Replace it, if there are.
Gear Sub-Assembly q Check pinion gear for damage and wear. Replace gear sub-assembly, if necessary.

Edition; 2004 May

PS-19

SGIA0179E
2005 Q45

POWER STEERING GEAR AND LINKAGE

q Check bearing while rotating it. Replace gear sub assembly if bearing ball race was dented, worn, or damaged.
Gear Housing Assembly Check gear housing assembly for damage and scratches (inner wall). Replace it, if necessary.
Outer Socket and Inner Socket Swing Torque q 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 moving, the measured value must be within the specification. If the reading is outside the specification, replace socket.

Item

Outer socket

Inner socket

Swinging torque

4.81 45.7 N (0.49 4.67 kg, 1.08 10.32
lb)

8.9 64 N·m (0.91 6.5 kg-m,
79 566 in-lb) (point indicated by
arrow)

Rotating torque
q Using preload gauge (SST), check if reading is within the value specified below. If the value is outside the standard, replace outer sockets.

SST333B

Rotating torque

: 0.3 2.9 N·m (0.03 0.29 kg-m, 3 25 i n-lb)

Axial End Play q 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 out side the standard, replace outer and inner sockets.
Outer socket : 0.5 mm (0.02 in) or less
Inner socket : 0.2 mm (0.008 in) or less

SST882B SGIA0057E

Edition; 2004 May

PS-20

2005 Q45

POWER STEERING GEAR AND LINKAGE

ASSEMBLY

1. Apply Genuine Nissan PSF or equivalent to O-ring. Put an O-ring into rack Teflon ring.

NOTE: Do not reuse O-ring.

2. Apply Genuine Nissan PSF or equivalent to rack Teflon ring,

then 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.

E
SST083B

3. To fit rack Teflon ring on rack assembly, use rack Teflon ring cor-

recting tool (SST) from tooth side. Compress rim of ring with the

tool.

4. Apply multi-purpose grease to rack oil seal. Insert rack oil seal,

then insert rack assembly to gear housing assembly.

NOTE:

Do not reuse rack oil seal.

CAUTION:

q When inserting rack assembly, do not damage retainer

sliding part. If it is damaged, replace gear housing

assembly.

SST885B

q When inserting rack assembly, do not damage cylinder inner wall. If it is damaged, it may cause I

oil leaks. Replace gear housing assembly.

q 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)]. 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.

SGIA0205E

SGIA0155E

Edition; 2004 May

PS-21

2005 Q45

POWER STEERING GEAR AND LINKAGE
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 with gear housing assembly.

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 assembly, move it to gear housing assembly.
5. Using a 36 mm (1.42 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, clinching cylinder at one point as shown in the figure using a punch. This will prevent end cover assembly from getting loose.
7. Apply genuine Nissan PSF or equivalent to O-ring, then install O-ring to gear housing assembly.
NOTE: Do not reuse O-ring.
8. Install gear sub assembly to gear housing assembly.

9. Attach lock plate to rack assembly.
NOTE: Do not reuse lock plate.
a. Attach spacer ring to rack assembly.
NOTE: Do not reuse spacer ring.
b. Install inner socket to lock plate.
c. Apply locking sealant (Three Bound 1111B or equivalent) to the thread of inner socket. Screw inner socket into rack assembly and tighten at the specified torque.

Edition; 2004 May

PS-22

SGIA0671E SGIA0157E SST081B SST073B SST866C
2005 Q45

POWER STEERING GEAR AND LINKAGE
d. Caulk lock plate at two points on rack groove. e. Install spacer ring to lock plate as shown in the figure.
CAUTION: When installing spacer ring, avoid damaging it. 10. Decide neutral position of rack assembly.
Rack stroke (L) : 68.5 mm (2.697 in) 11. Install rear cover cap to gear sub assembly. 12. Apply multi-purpose grease to retainer, then install retainer,
spring and adjust screw to gear housing assembly.

13. Apply thread locking adhesive (Three Bound TB IIIIB 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.
14. With adjusting screw held in place, tighten lock nut to the specified torque.
15. Rotate pinion ten times throughout the full stroke of rack assembly so that parts get to fit each other.

16. Measure pinion rotating torque within ±180°, preload gauge (SST) and torque adapter (SST), then hold preload gauge (SST) at a position showing the maximum torque.
17. After loosening adjusting screw once, tighten it again with torque of 4.9 5.9 N·m (0.5 0.6 kg-m, 44 52 in-lb). After that loosen it within 20° to 40°.
18. With adjusting screw held in place, tighten lock nut to specified torque.

19. Measure pinion rotating torque with torque adapter (SST) and preload gauge (SST), then confirm whether it's 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 specified value or the rotating torque of adjusting screw is less than 5 N· m (0.51 kg-m, 44 in-lb).

Pinion rotating torque: Around neutral position [within±11.5 mm (0.453 in]
Average "A" 0.79 1.27 N·m (0.08 0.12 kg-m, 7 11 in-lb)
Fluctuation "B": 0.39 N·m (0.04 kg-m, 3 in-lb)
Other than above Average "A"
0.58 N·m (0.06 kg-m, 5 in-lb)

Edition; 2004 May

PS-23

A B C D E
SGIA0629J
F PS
H
SGIA0568E
I J K L
STC0036D
M
SGIA0788E
2005 Q45

POWER STEERING GEAR AND LINKAGE
Maximum variation "B" 1.86 N·m (0.19 kg-m, 16 in-lb)
20. Turn pinion fully to the end of the left with inner socket to gear housing assembly. 21. Set dial gauge to rack as shown in the figure. Measure vertical
movement of rack assembly when pinion is turned counterclockwise with torque of 4.9 N·m (0.5 kg-m, 43 in-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. 22. Install large side of boot to gear housing assembly. 23. Install small side of boot to the mounting groove of inner socket boot. 24. Install boot clamp to the small side of boot. 25. Install boot clamp to the large side of boot. NOTE: Do not reuse boot clamp. a. Tighten large side of RH/LH boot with boot clamp (stainless steel wire).
Wire length (L) : 370 mm (14.57 in)
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, 22.1 lb).
c. Twist boot clamp as shown in the figure, pay attention to relationship between winding and twisting directions.
d. Twisted point should face front of vehicle (* marked portion) with steering gear assembly installed on vehicle (to prevent interference with other parts).

SGIA0484E SGIA0163E

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.
26. Install cylinder tubes to gear housing assembly.

Edition; 2004 May

PS-24

SGIA0797E
STC0124D
2005 Q45

POWER STEERING GEAR AND LINKAGE

27. Tighten lightly outer socket in specified length "L", then tighten lock nut at specified torque. Refer to PS-18, "Disassembly and Assembly" . Reconfirm if outer socket length is within limit of the specified length "L".

Inner socket length (L)

: 160 mm (6.30 in)

CAUTION: Perform toe-in adjusting after this procedure. Length achieved after toe-in adjustment is not necessary value given here.

A B C
STC0125D
D E F PS H I J K L M

Edition; 2004 May

PS-25

2005 Q45

POWER STEERING OIL PUMP

PFP:49110

On-Vehicle Inspection and Service
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: q 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.
q 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.

EGS00076 SST834-F

Relief oil pressure: : 8,500 - 9,300 kPa (88 - 94 kg/cm2 , 1,251 - 1,337 psi)

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-27, "Disassembly and Assembly" .
5. After inspection, disconnect oil pressure gauge (SST) and oil pressure gauge adapter (SST) from hydraulic 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 Installation
REMOVAL 1. Remove battery and radiator reservoir tank from vehicle. 2. Drain power steering fluid from reservoir tank. 3. Loosen adjusting screw and bolts for oil pump attaching bracket and remove belt. 4. Remove oil pump union bolt and hose. 5. Remove oil pump bolts and oil pump attaching bracket. 6. Remove oil pump from vehicle.

EGS00077

INSTALLATION Refer to PS-31, "HYDRAULIC LINE" for tightening torque. Install in the reverse order of removal. q After installation, adjust belt tension. Refer to EM-13, "DRIVE BELTS" . q After installation, bleed air. Refer to PS-6, "Air Bleeding Hydraulic System" .

Edition; 2004 May

PS-26

2005 Q45

POWER STEERING OIL PUMP Disassembly and Assembly

EGS00078
A

1. Rear cover 4. Lock pin 7. Vane 10. Body assembly 13. Drive shaft assembly 16. Spring washer 19. Flow control valve 22. Washer

2. Gasket 5. Rotor 8. Side plate 11. Suction pipe 14. Snap ring 17. Oil seal 20. O-ring 23. Connector bolt

3. Cam ring 6. Cartridge 9. O-ring 12. O-ring 15. Pulley 18. Spring 21. Joint

SGIA0833E
K L M

INSPECTION BEFORE DISASSEMBLY Disassemble power steering oil pump only if the following items are found. q Oil leakage from oil pump q Deformed or damaged pulley q Poor performance
DISASSEMBLY NOTE: Secure oil pump in a vise as the occasion demands. CAUTION: When retaining drive shaft in a vice, always use copper or aluminum plates between vise and shaft. 1. Unscrew four rear cover bolts and remove rear cover from body assembly. 2. Remove gasket from body assembly. 3. Remove lock pin, cartridge and side plate from body assembly.

Edition; 2004 May

PS-27

2005 Q45

POWER STEERING OIL PUMP
4. Remove pulley from drive shaft assembly. 5. Remove snap ring from drive shaft assembly and press out it.
CAUTION: When removing snap ring, be careful not to damage drive shaft assembly.
6. Using a screwdriver, remove oil seal for body assembly. 7. Remove O-ring from body assembly.

SST010B

8. Loosen lock nut and remove washer, O-ring, joint then remove connector bolt, O-ring and pull out flow control valve and spring from body assembly.
CAUTION: Be careful not to drop and deform the flow control valve.
9. Remove suction pipe from body assembly.
10. Remove O-ring for suction pipe.

SST034A

SGIA0524E
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 assembly with new one.

Edition; 2004 May

PS-28

2005 Q45

POWER STEERING OIL PUMP

ASSEMBLY

NOTE:

Secure oil pump in a vise as the occasion demands.

CAUTION: When retaining drive shaft assembly in a vise, always use copper or aluminum plates between vise B and shaft.

1. Apply a coat of genuine Nissan PSF or equivalent to oil seal lip

and to the circumference of oil seal. Using proper tool, such as

hand press machine, install it to body assembly.

NOTE: Do not reuse oil seal
2. Apply a coat of genuine Nissan PSF or equivalent to drive shaft assembly and press drive shaft assembly into body assembly with suitable tool, then install snap ring.
NOTE: Do not reuse snap ring.
3. Apply a coat of genuine Nissan PSF or equivalent to O-ring and install O-ring into body assembly.

D
E
SST038A
F

NOTE: Do not reuse O-ring.
PS 4. Install side plate to body assembly.

5. Install lock pin into lock pin hole, and install cam-ring as shown in the figure.
q When installing cam-ring, turn the face with a letter (E) of it to rear cover.
CAUTION: Do not confuse the assembling direction of cam ring. If cam-ring is installed facing the incorrect direction, it may cause pump operation malfunction.

J
SGIA0422E
K
L
M

6. Install rotor to body assembly. Edition; 2004 May

PS-29

SGIA0591E
2005 Q45

POWER STEERING OIL PUMP
q When installing rotor, turn punch mark face on rotor to body assembly.
7. Install vane to rotor with facing the round portion outside. 8. Check if drive shaft assembly turns smoothly. 9. Install gasket to body assembly.
NOTE: Do not reuse gasket.
10. Install rear cover to body assembly and tighten bolts at the specified torque.
11. Install pulley to drive shaft assembly then tighten lock nut at the specified torque.
12. Install spring, flow control valve, O-ring, connector bolt, joint, washer to body assembly. Then tighten lock nut at the specified torque. NOTE: Do not reuse O-ring.
13. Apply a coat of Nissan PSF or equivalent to O-ring and install Oring to body assembly. NOTE: Do not reuse O-ring.
14. Install suction pipe to body assembly.

SGIA0424E SST843A SGIA0425E

Edition; 2004 May

PS-30

2005 Q45

HYDRAULIC LINE Components

HYDRAULIC LINE

PFP:49721
A
EGS0013H
B C D E F PS H I J K L M

1. Reservoir tank 4. Oil pump
Edition; 2004 May

2. Suction hose 5. Steering gear assembly
PS-31

3. High pressure hose 6. Eye bolt

SGIA0834E

2005 Q45

HYDRAULIC LINE
Removal and Installation
q Refer to PS-31, "Components" for tightening torque. Install in the reverse order of removal. NOTE: Refer to component parts location and do not reuse non-reusable parts.
q Confirm with mating marking that if it is in phase with hose and clamp, then correct if needs.

EGS0013I

SGIA0563E

Edition; 2004 May

PS-32

2005 Q45

SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS) Steering Wheel

End play of the axial direction for steering wheel Steering wheel play on the outer circumference
Steering Angle

0 mm (0 in) 0 - 35 mm (0 - 1.38 in)

1Inner wheel Degree minute (Decimal degree)
Outer wheel Degree mine (Decimal degree)
Steering Column

Minimum Nominal Maximum
Nominal

39°45 (39.75°) 42°45 (42.75°) 43°45 (43.75°)
33°50 (33.83°)

Steering column length L1 Steering column length L2

643 mm (25.31 in) 379.8 mm (14.95 in)

PFP:00030
A
EGS0007A
B
EGS0007B
C
D
E
EGS0007C
F

SST315B

Steering Outer Socket and Inner Socket

EGS0007D

Steering gear type

PR26AF

Outer socket ball joint

Swinging torque Spring balance reading (Measuring point: stud bolt hole) Rotating torque Axial end play

0.3 - 2.9 N·m (0.03 - 0.29 kg-m, 3 - 25 in-lb)
K
4.81 - 45.7 N (0.49 - 4.67 kg, 1.08 - 10.32 lb)

0.3 - 2.9 N·m (0.03 - 0.29 kg-m, 3 - 25 in-lb)

0.5 mm (0.02 in) or less

Swinging torque

1.0 - 7.8 N·m (0.1 - 0.8 kg-m, 9 - 69 in-lb}

Inner socket ball joint

Measured value of spring scale (measuring point: mark)

8.9 - 64 N (0.91 - 6.5 kg, 79 - 566 in)

Axial end play

0.2 mm (0.008 in) or less

Inner socket length "L"

160 mm (6.30 in)

Edition; 2004 May

PS-33

STC1006D

2005 Q45

SERVICE DATA AND SPECIFICATIONS (SDS)

Steering Gear
Steering gear model Rack neutral position, dimension "L" (Rack stroke

PR26AF 68.5 mm (2.697 in)

EGS0007E

Rack sliding torque:
Oil Pump
Oil pump relief hydraulic pressure
Steering Fluid
Fluid capacity

SGIA0629J

Range within ±11.5 mm from neutral position ((at power ON)

Area average value

Allowable variation

Whole area (at power OFF)

Peak value
Allowable variation

245.2 - 294.2N (25 - 30 kg, 55 -66 lb)
58 N (6.0 kg, 13 lb) or less 294 N (30.0 kg, 66 lb) or less 147 N (15.0 kg, 33 lb) or less

8,500 - 9,300 kPa (88 -94 kg/cm2 , 1,251 - 1,337 psi)

EGS0007F

approx. 1.0 (1-1/8 us qt, 7/8 Imp qt)

EGS0007G

Edition; 2004 May

PS-34

2005 Q45

Acrobat Distiller 4.05 for Windows FrameMaker SGML 5.5.6p145J