Nissan Murano Z50 (2003 year). Manual - part 252

PS-6

POWER STEERING FLUID

Revision; 2004 April

2003 Murano

POWER STEERING FLUID

PFP:KLF20

Checking Fluid Level

AGS000CH

●

Stop engine before performing a fluid level check.

●

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

●

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

CAUTION:

●

Do not overfill the Max range.

●

Do not reuse any used power steering fluid.

●

Recommended fluid is Genuine NISSAN PSF II or equivalent.

Checking Fluid Leakage

AGS000CI

Check the lines for improper attachment and for leaks, cracks, dam-
age, 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 from oil pump is noticed, check oil pump. Refer to 

PS-28, "POWER STEERING OIL

PUMP"

 .

6.

Check steering gear boots for accumulation of power steering fluid indicating a steering gear leak.

Air Bleeding Hydraulic System

AGS000CJ

Incomplete air bleeding causes the following to occur. 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 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.

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

SGIA0506E

POWER STEERING FLUID

PS-7

C

D

E

F

H

I

J

K

L

M

A

B

PS

Revision; 2004 April

2003 Murano

CAUTION:

Do not hold steering wheel in a located position for 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.

PS-8

STEERING WHEEL

Revision; 2004 April

2003 Murano

STEERING WHEEL

PFP:48430

On-Vehicle Inspection and Service

AGS000CK

CHECKING CONDITION OF INSTALLATION

●

Check installation conditions of steering gear assembly, front suspension, 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 and nut for steering gear are loose
or not.

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

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 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.

Remove driver air bag module from steering wheel. Refer to 

SRS-36, "DRIVER AIR BAG MODULE"

 .

3.

Start engine at idle, make steering fluid reach to normal operat-
ing temperature [50 to 80

°

C (122 to 176

°

F)], then check steering

wheel turning torque with pre-load gauge (SST).

4.

If steering wheel turning force is out of specification, check relief hydraulic pressure of oil pump. Refer to

PS-28, "POWER STEERING OIL PUMP"

 .

End play of the axial direction for steering wheel

: 0 mm (0 in) 

Tightening torque

Bolt: 136 - 164 N·m (14 - 16 kg-m, 101 - 120 ft-lb)

Nut: 121.6 - 149.1 N·m (13 - 15, kg-m, 90 - 109 ft-lb)

SGIA0458E

Steering wheel play

: 0 - 35 mm (0 - 1.38 in)

Steering wheel turning force:

7.45 N·m (0.76 kg-m, 66 in-lb) or less

SGIA0459E

STEERING WHEEL

PS-9

C

D

E

F

H

I

J

K

L

M

A

B

PS

Revision; 2004 April

2003 Murano

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.

●

Start engine and run at idle, turn steering wheel all the way right
and left, measure the turning angle.

●

Any turning angles are not adjustable. If any of steering angles are out of the specification, check if the fol-
lowing parts are worn or damaged.

–

Steering gear

–

Steering column

–

Front suspension components
If found that they are worn or damaged, replace them with new ones respectively.

Removal and Installation

AGS000CL

Refer to 

PS-10, "STEERING COLUMN"

 .

FAA0016D

Tire Size

18 inch

Inner wheel (Angle: A)

Minimum

35

°

00

′

 (35.0

°

)

Nominal

38

°

00

′

 (38.0

°

)

Maximum

39

°

00

′

 (39.0

°

)

Outer wheel (Angle: B)

Nominal

31

°

30

′

 (31.5

°

)

SGIA0055E

PS-10

STEERING COLUMN

Revision; 2004 April

2003 Murano

STEERING COLUMN

PFP:48810

Removal and Installation

AGS000CM

CAUTION:

●

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

●

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

REMOVAL

1.

Set vehicle to the straight ahead-direction.

2.

Remove driver air bag module from steering wheel. Refer to 

SRS-36, "DRIVER AIR BAG MODULE"

 .

3.

Disconnect steering switch connector, remove steering wheel lock nut, then remove steering wheel. Refer
to 

SRS-38, "SPIRAL CABLE"

 .

1.

Steering wheel lock nut

2.

Lid

3.

Steering wheel

4.

Combination switch and spiral cable 5.

Steering column assembly

6.

Hole cover seal

7.

Clamp

8.

Hole cover

9.

Lower joint

10. Tilt lever knob

SGIA0468E

STEERING COLUMN

PS-11

C

D

E

F

H

I

J

K

L

M

A

B

PS

Revision; 2004 April

2003 Murano

4.

Remove fixing screw of tilt lever knob, then remove tilt lever
knob from tilt lever.

5.

Remove instrument driver lower panel. Refer to 

IP-10, "INSTRUMENT PANEL ASSEMBLY"

 .

6.

Remove steering column cover and ignition key finisher. Refer to 

IP-10, "INSTRUMENT PANEL ASSEM-

BLY"

 .

7.

Remove NATS antenna amp. Refer to 

BL-204, "How to Replace NATS Antenna Amp."

 .

8.

Remove fixing screws of knee protector, then remove knee pro-
tector from vehicle.

9.

Remove combination switch and spiral cable from steering column assembly. Refer to 

SRS-38, "SPIRAL

CABLE"

 .

10. Disconnect harness connector from each switch on steering column shaft, then separate vehicle side har-

ness from it.

11. Remove lock nut and bolt, then separate lower joint from upper

joint.

12. Remove fixing nuts from steering member, remove steering col-

umn assembly from steering member.

13. Remove hole cover seal and clamp.

SGIA0469E

SGIA0470E

SGIA0471E

SGIA0473E

PS-12

STEERING COLUMN

Revision; 2004 April

2003 Murano

14. Remove mounting nuts, then remove hole cover from dash panel.

15. Raise vehicle, then remove mounting bolt (lower side) of lower

joint and remove lower joint from vehicle.

INSPECTION AFTER REMOVAL

●

Check if there is something wrong with jacket tube etc. And then if they are damaged, replace with new
one.

●

If vehicle is light shocked, check column length “L1” or “L2” as
shown in the figure. Then if it is out of the specified value,
replace with new one.

●

Check the turning torque of steering column with preload gauge (SST). If it is out of the specified value,
repair it or replace with new one.

INSTALLATION

●

Refer to 

PS-10, "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.

●

When installing steering column to steering member, install mounting nut from front side of vehicle.

INSPECTION AFTER INSTALLATION

●

After installing steering column to vehicle, check tilt device and
its operation range. Ranges of operation are shown in the figure.

●

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

SGIA0474E

Steering column length

           L1: 181 - 183 mm (7.13 - 7.20 in)

           L2: 240.4 - 244.8 mm (9.46 - 9.64 in)

SGIA0475E

Turning torque

: 0 - 0.2 N·m (0 - 0.02 kg-m, 0 - 1 in-lb)

SGIA0476E

STEERING COLUMN

PS-13

C

D

E

F

H

I

J

K

L

M

A

B

PS

Revision; 2004 April

2003 Murano

Disassembly and Assembly

AGS000CN

DISASSEMBLY

1.

Remove spring from steering column assembly and tilt lever.

2.

Remove fixing bolt of upper joint, then remove upper joint from
steering column assembly.

ASSEMBLY

●

Refer to 

PS-13, "Disassembly and Assembly"

  for tightening torque. Install in the reverse order of removal.

1.

Steering column assembly

2.

Spring

3.

Tilt lever knob

4.

Upper joint

SGIA0478E

SGIA0479E

PS-14

POWER STEERING GEAR AND LINKAGE

Revision; 2004 April

2003 Murano

POWER STEERING GEAR AND LINKAGE

PFP:49001

Removal and Installation

AGS000CO

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
2WD

1.

Set wheels in the straight-ahead position.

2.

Remove lock nut and bolt, then separate lower joint from upper
joint.

3.

Remove tires from vehicle with power tool.

4.

Confirm slit of lower joint fits with the projection on rear cover
cap, furthermore marking position on steering gear assembly
nearly fits with the projection on rear cover cap.

5.

Remove cotter pin at steering knuckle, then loosen mounting nut.

1.

Steering gear assembly

2.

Cotter pin 

3.

Rack mounting bracket

4.

Rack mounting insulator

5.

Sleeve

SGIA0486E

SGIA0471E

SGIA0487E

POWER STEERING GEAR AND LINKAGE

PS-15

C

D

E

F

H

I

J

K

L

M

A

B

PS

Revision; 2004 April

2003 Murano

6.

Use a ball joint remover (SST) to remove steering outer socket
from steering knuckle. Be careful not to damage ball joint boot.

CAUTION:

To prevent damage to threads and to prevent ball joint
remover (SST) from coming off, and temporarily tighten
mounting nut.

7.

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

8.

Remove mounting bolt (lower side) of lower joint.

9.

Remove mounting bolts and nut of steering gear assembly, and
then remove steering gear assembly, rack mounting bracket,
rack mounting insulator and sleeve from vehicle.

SGIA0488E

SGIA0489E

SGIA0474E

SGIA0458E

PS-16

POWER STEERING GEAR AND LINKAGE

Revision; 2004 April

2003 Murano

AWD

1.

Set wheels in the straight-ahead position.

2.

Remove lock nut and bolt, then separate lower joint from upper
joint.

3.

Remove tires from vehicle with power tool.

4.

Remove undercover from vehicle with power tool.

5.

Confirm slit of lower joint fits with the projection on rear cover
cap, furthermore marking position on steering gear assembly
nearly fits with the projection on rear cover cap.

6.

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

7.

Remove cotter pin at steering knuckle, then loosen mounting nut.

8.

Use a ball joint remover (SST) to remove steering outer socket
from steering knuckle. Be careful not to damage ball joint boot. 

CAUTION:

To prevent damage to threads and to prevent ball joint
remover (SST) from coming off, and temporarily tighten
mounting nut.

SGIA0471E

SGIA0487E

SGIA0489E

SGIA0488E

POWER STEERING GEAR AND LINKAGE

PS-17

C

D

E

F

H

I

J

K

L

M

A

B

PS

Revision; 2004 April

2003 Murano

9.

Remove mounting bolt (lower side) of lower joint.

10. Remove front exhaust tube with power tool. Refer to 

EX-3, "EXHAUST SYSTEM"

 .

11. Remove rear propeller shaft. Refer to 

PR-4, "REAR PROPELLER SHAFT"

 .

12. Remove mounting nuts on lower position of stabilizer connecting rod with power tool.
13. Remove mounting bolts of stabilizer clamp and hang stabilizer on vehicle with power tool.

14. Remove steering hydraulic piping bracket from front suspension member. Refer to 

PS-34, "HYDRAULIC

LINE"

 .

15. Disconnect electrical rear engine mounting actuator harness connector. Refer to 

EM-95, "ENGINE

ASSEMBLY"

 .

16. Set jack under engine and front suspension member.
17. Remove mounting bolts of rear engine mounting insulator with power tool. Refer to 

EM-95, "ENGINE

ASSEMBLY"

 .

18. Loosen mounting nuts of front suspension member (front side).

19. Remove mounting bolts of member stay (body side) with power tool, then loosen mounting nuts of mem-

ber stay (front suspension member side).

20. Move jack down slowly (front suspension member side) to remove rear engine mounting insulator from

engine and front suspension member.

21. Remove mounting bolts and nut of steering gear assembly, and

then remove steering gear assembly, rack mounting bracket,
rack mounting insulator and sleeve from vehicle.

INSTALLATION

●

Refer to 

PS-14, "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.

●

When steering wheel is set in the straight ahead direction, con-
firm slit of lower joint fits with the projection on rear cover cap,
furthermore marking position on steering gear assembly nearly
fits with the projection on rear cover cap.

SGIA0474E

SGIA0458E

SGIA0487E

PS-18

POWER STEERING GEAR AND LINKAGE

Revision; 2004 April

2003 Murano

●

After installation, bleed air from piping. Refer to 

PS-6, "Air Bleeding Hydraulic System"

 .

INSPECTION AFTER INSTALLATION

●

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

POWER STEERING GEAR AND LINKAGE

PS-19

C

D

E

F

H

I

J

K

L

M

A

B

PS

Revision; 2004 April

2003 Murano

Disassembly and Assembly

AGS000EQ

SGIA0499E

PS-20

POWER STEERING GEAR AND LINKAGE

Revision; 2004 April

2003 Murano

CAUTION:

●

Secure steering gear assembly with a vise, using copper
plates or something similar to prevent it from being dam-
aged. Do not grip cylinder with a vise.

●

Before performing disassembly, clean steering gear assem-
bly with kerosene. Be careful not to bring any kerosene into
contact with the discharge and return port connectors.

DISASSEMBLY

1.

Remove cylinder tubes from gear housing assembly.

2.

Remove rear cover cap from gear housing assembly.

3.

Measure adjusting screw height from gear housing assembly,
then loosen adjusting screw.

CAUTION:

●

Do not turn adjusting screw more than twice.

●

Replace steering gear assembly when adjusting screw is
removed or more than twice.

4.

Use a rear cover wrench (SST) to remove rear cover from sub-
gear assembly.

5.

Remove O-ring with a flat-bladed screwdriver, and pull out rear
cover.

1.

Cotter pin

2.

Outer socket

3.

Boot clamp

4.

Boot

5.

Inner socket

6.

Boot clamp

7.

Gear housing assembly

8.

Cylinder tubes

9.

Rear cover cap

10. Rear cover

11.

O-ring

12. Sub-gear assembly

13. Rack oil seal

14. Rack assembly

15. Rack Teflon ring

16. O-ring

17. End cover assembly

SGIA0500E

SGIA0568E

SGIA0507E

SGIA0508E

POWER STEERING GEAR AND LINKAGE

PS-21

C

D

E

F

H

I

J

K

L

M

A

B

PS

Revision; 2004 April

2003 Murano

6.

Remove sub-gear assembly from gear housing assembly.

CAUTION:

In order to protect oil seal from any damage, pull sub-gear assembly out straightly.

7.

Loosen lock nut of outer socket, and remove outer socket.

8.

Remove boot clamps of the small diameter side and the large diameter side, then remove boot.

CAUTION:

When removing boots, be careful not to damage inner socket and gear housing assembly. If they
are is damaged, change them to avoid oil leaks.

9.

Drill out the punch caulking area on cylinder outer rim with a 3
mm (0.12 in) drill bit. [Drill approximately. 1.5 mm (0.059 in) in
depth.]

10. Remove end cover assembly with a 45 mm (1.77 in) open head (SST).

CAUTION:

Be careful not to damage rack. If it is damaged, replace rack. Otherwise, oil leaks may result.

11. 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.

12. 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.

13. 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

Check rack for damage and wear. Replace it, if necessary.

STC0013D

SGIA0151E

SGIA0179E