Nissan Murano Z50 (2006 year). Manual

POWER STEERING GEAR

PS-15

Revision: 2006 August

2006 Murano

POWER STEERING GEAR

PFP:49001

Removal and Installation

NGS0003M

COMPONENT

REMOVAL
2WD

Set vehicle to the straight-ahead position.

Remove lock nut and bolt, then separate lower shaft (1) from
upper joint (2).

Remove tires from vehicle with power tool.

Confirm slit of lower shaft (C) fits with the projection (A) on rear
cover cap (1), furthermore marking position (B) on steering gear
assembly nearly fits with the projection (A) on rear cover cap (1).

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

Steering gear assembly

Cotter pin

Rack mounting bracket

Rack mounting insulator

Sleeve

SGIA0486E

SGIA1137E

SGIA1140E

PS-16

POWER STEERING GEAR

Revision: 2006 August

2006 Murano

Remove steering outer socket from steering knuckle so as not to
damage ball joint boot using the ball joint remover [suitable tool].

CAUTION:

Temporarily tighten the nut to prevent damage to threads
and to prevent the ball joint remover [suitable tool] from
suddenly coming off.

Remove high-pressure piping (1) and low-pressure hose (2) of
hydraulic piping, and then drain power steering fluid. Refer to

PS-34, "Removal and Installation"

Remove mounting bolt (lower side) of lower shaft (1).

CAUTION:

Spiral cable may snap due to steering operation if steering
column is separated from steering gear assembly. There-
fore fix steering wheel with a string to avoid turns.

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.

SGIA1164E

SGIA1165E

SGIA1138E

SGIA0458E

POWER STEERING GEAR

PS-17

Revision: 2006 August

2006 Murano

AWD

Set vehicle to the straight-ahead position.

Remove lock nut and bolt, then separate lower shaft (1) from
upper joint (2).

Remove tires from vehicle with power tool.

Remove undercover from vehicle with power tool.

Remove high-pressure piping (1) and low-pressure hose (2) of
hydraulic piping, and then drain power steering fluid. Refer to

PS-34, "Removal and Installation"

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

Remove steering outer socket from steering knuckle so as not to
damage ball joint boot using the ball joint remover [suitable tool].

CAUTION:

Temporarily tighten the nut to prevent damage to threads
and to prevent the ball joint remover [suitable tool] from
suddenly coming off.

SGIA1137E

SGIA1140E

SGIA1165E

SGIA1164E

PS-18

POWER STEERING GEAR

Revision: 2006 August

2006 Murano

Remove mounting bolt (lower side) of lower shaft (1).

CAUTION:

Spiral cable may snap due to steering operation if steering
column is separated from steering gear assembly. There-
fore fix steering wheel with a string to avoid turns.

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

EX-3,

"EXHAUST SYSTEM"

11. Remove rear propeller shaft. Refer to

PR-4, "REAR PROPEL-

LER 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-108, "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-108, "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.

SGIA1138E

SGIA0458E

POWER STEERING GEAR

PS-19

Revision: 2006 August

2006 Murano

INSTALLATION

Note the following, and install is in the reverse order of removal.

●

Refer to

PS-15, "COMPONENT"

about each tightening torque.

●

When installing lower shaft to steering gear assembly, follow the procedure listed below.

–

Set rack of steering gear in the neutral position.

NOTE:
To get the neutral position of rack, turn sub-gear assembly and measure the distance of inner socket, and
then measure the intermediate position of the distance.

–

Align rear cover cap projection (A) with the marking position (B) of gear housing assembly.

–

Install slit part of lower shaft (C) aligning with the projection (A)
of rear cover cap (1). Make sure that the slit part of lower shaft
(C) is aligned with both the projection (A) of rear cover cap (1)
and the marking position (B) of gear housing assembly.

●

After installation, bleed air from the steering hydraulic system.
Refer to

PS-7, "Air Bleeding Hydraulic System"

●

Perform final tightening of nuts and bolts on each part under
unladen conditions with tires on level ground when removing
steering gear assembly. Check wheel alignment. Refer to

FSU-

5, "Wheel Alignment Inspection"

●

Adjust neutral position of steering angle sensor after checking
wheel alignment. Refer to

SRS-41, "INSTALLATION"

INSPECTION AFTER INSTALLATION

●

Make sure that steering wheel operates smoothly by turning several times from full left stop to full right
stop.

SGIA1140E

POWER STEERING GEAR

PS-21

Revision: 2006 August

2006 Murano

DISASSEMBLY

CAUTION:

●

Disassemble steering gear assembly by securing the mounting area in a vise using copper plates.

●

Clean steering gear assembly with kerosene before disassembling. Be careful to avoid splashing
or applying any kerosene over connector of discharge port or return port.

Remove cylinder tubes from gear housing assembly.

Remove rear cover cap from gear housing assembly.

Measure adjusting screw height “H”, and loosen adjusting
screw.

CAUTION:

●

Do not loosen adjusting screw 2 turns or more.

●

Replace steering gear assembly if adjusting screw is
loosened 2 turns or more and it is removed.

Use a Tool (A) to remove rear cover from sub-gear assembly.

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

Remove sub-gear assembly from gear housing assembly.

CAUTION:

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

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

Remove boot clamp, and then remove boot from inner socket.

CAUTION:

●

Do not damage inner socket and gear housing assembly
when removing boot.

●

Inner socket and gear housing assembly must be replaced if inner socket and gear housing
assembly are damaged because it may cause foreign material interfusion.

Cotter pin

Outer socket

Boot clamp

Boot

Inner socket

Boot clamp

Gear housing assembly

Cylinder tubes

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

SGIA0624E

Tool number

A: KV48104400 (J-46213)

SGIA1542E

SGIA0508E

PS-22

POWER STEERING GEAR

Revision: 2006 August

2006 Murano

10. Drill out the clinching part of gear housing assembly (end cover

assembly side) outer rim with a 3 mm (0.12 in) drill bit. [Drill for
approximately 1.5 mm (0.059 in) depth.]

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

(suitable tool).

CAUTION:

●

Do not damage rack assembly surface when removing.

●

Rack assembly must be replaced if damaged because it
may cause fluid leakage.

12. Pull rack assembly together with rack oil seal (outer side) out

from gear housing assembly.

CAUTION:

●

Do not damage cylinder inner wall when removing rack
assembly.

●

Gear housing assembly must be replaced if damaged because it may cause fluid leakage.

13. Heat rack Teflon ring to approximately. 40

C (104

F) with a

dryer, then remove it and O-ring from rack.

CAUTION:

Do not damage rack assembly. Rack assembly must be
replaced if damaged because it may cause fluid leakage.

14. Push rack oil seal inside with a 29 mm (1.14 in) socket and an

extension bar to push out rack oil seal (inner side) from gear
housing assembly.

CAUTION:

●

Do not damage gear housing assembly and cylinder
inner wall.

●

Gear housing assembly must be replaced if damaged
because it may cause fluid leakage.

STC0013D

SST081B

SGIA0151E

SGIA0179E

POWER STEERING GEAR

PS-23

Revision: 2006 August

2006 Murano

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.

Sub-Gear Assembly

●

Check pinion gear for damage and wear. Replace it, if necessary.

●

Rotate pinion and check for torque variation or rattle. Replace if there are.

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 and pull
the spring balance. Make sure that the spring balance reads the
specified value when ball stud and inner socket start to move.
Replace outer socket and steering gear assembly if they are
outside the standard.

Rotating Torque

●

Make sure that the reading is within the following specified
range using Tool. Replace outer socket if the reading is outside
the specified value.

Axial End Play

●

Apply an axial load of 490 N (50 kg, 111 lb) to ball stud using a
dial gauge. Measure amount of stud movement, and then make
sure that the value is within the following specified range.
Replace outer socket and inner socket if the measured value is
outside the standard.

Swing torque

Measuring point:

Outer socket: Cotter pin hole of stud

Inner socket: [“L” = 83.2 mm (3.276 in)]

Outer socket:

4.84 - 46.7 N (0.50 - 4.7 kg, 1.09 - 10.4 lb)

Inner socket:

12.1 - 93.7 N (1.3 - 9.5, kg, 2.8 - 21.0 lb)

Tool number

A: ST3127S000 (

—

)

Outer socket:

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

SGIA0547E

SGIA1382E

Outer socket

: 0.5 mm (0.02 in) or less

Inner socket

: 0.2 mm (0.008 in) or less

SGIA0057E

PS-24

POWER STEERING GEAR

Revision: 2006 August

2006 Murano

ASSEMBLY

CAUTION:

Assemble steering gear assembly by securing the mounting area in a vise using copper plates.
1.

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

CAUTION:

Do not reuse O-ring.

Heat rack Teflon ring to approximately 40

C (104

F) with a

dryer. Assemble it to mounting groove of rack assembly.

CAUTION:

Do not reuse rack Teflon ring.

Install the Tool (A) from tooth side of rack to fit rack Teflon ring
(1) on rack. Compress the ring with tool.

Apply multi-purpose grease to rack oil seal. And install rack oil
seal in the following procedure. Then assemble rack assembly
to gear housing assembly.

CAUTION:

●

Do not reuse rack oil seal.

●

Install rack oil seal in a direction so that the lip of inner oil
seal and the lip of outer oil seal face each other.

●

Do not damage retainer sliding surface by rack assembly.
Replace gear housing assembly if damaged.

●

Do not damage gear housing assembly inner wall by rack
assembly. Gear housing assembly must be replaced if
damaged because it may cause fluid leakage.

Wrap an OHP sheet [approximately 70 mm (2.76 in)

100 mm

(3.94 in).] Around rack assembly teeth to avoid damaging rack
oil seal (inner). Install rack oil seal over sheet. Then, pull oil seal
along with OHP sheet until they pass rack assembly teeth, and
remove OHP sheet.

SGIA0153E

Tool number

A: KV48104400 (

—

)

SGIA1543E

SGIA0205E

SGIA0155E

POWER STEERING GEAR

PS-25

Revision: 2006 August

2006 Murano

Insert rack oil seal (inner) into rack assembly piston (rack Teflon
ring).

Push retainer to adjusting screw side by hand, and move the
rack assembly inside the gear housing assembly so that the
rack oil seal (inner) can be pressed against the gear housing
assembly.

Wrap an OHP sheet [approximately 70 mm (2.76 in)

100 mm

(3.94 in).] Around the edge to avoid damaging rack oil seal
(outer). Install rack oil seal over sheet. Then, pull oil seal along
with OHP sheet until they pass rack edge, and remove OHP
sheet.

Install end cover assembly to rack edge, and move rack oil seal
(outer) until it contacts with gear housing assembly.

Tighten end cover assembly to specified torque using a 45 mm
(1.77 in) open head (suitable tool).

CAUTION:

Do not damage rack assembly. Replace it if damaged
because it may cause fluid leakage.

Crimp gear housing assembly at one point using a punch as
shown in the figure so as to prevent end cover assembly from
getting loose after tightening end cover assembly.

Install sub-gear assembly to gear housing assembly.

CAUTION:

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

Apply Nissan PSF or equivalent to O-ring. Install O-ring to rear
cover.

CAUTION:

Do not reuse O-ring.

Using a Tool (A), install rear cover to gear housing assembly.

SGIA0671E

SGIA0157E

SST081B

Tool number

A: KV48104400 (J-46213)

SGIA0871E

SGIA1542E

PS-26

POWER STEERING GEAR

Revision: 2006 August

2006 Murano

10. Decide on the neutral position for the rack.

11. Install rear cover cap to gear housing assembly.

CAUTION:

Make sure that the projection of rear cover cap is aligned
with the marking position of gear housing assembly.

12. Apply Three Bond TB1111 or equivalent to the thread (2 turns

thread), and then screw in the adjusting screw until it reaches
height “H” from gear housing assembly measured before disas-
sembling.

CAUTION:

●

Do not turn adjusting screw more than twice.

●

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

13. Adjust pinion rotating torque with the following procedure.

Measure pinion rotating torque within

180

of neutral position

of the rack assembly using Tools. Stop the gear at the point
where highest torque is read.

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). Furthermore
loosen it within from 20

to 40

Measure pinion rotating torque using Tools to make sure that the
measured value is within the standard. Readjust if the value is
outside the standard. Replace steering gear assembly if the
value is outside the standard after readjusting or adjusting screw
rotating torque is 5 N·m (0.51 kg- m, 44 in-lb) or less.

Turn pinion fully to the end of the left with inner socket to gear housing assembly.

Rack stroke “L”

: 71.5 mm (2.815 in)

SGIA0629J

SGIA0624E

Tool number

A: ST3127S000 (J-25765-A)

B: KV48103400 (

—

)

SGIA1383E

Pinion rotating torque

Maximum variation “B”:

2.3 N.m (0.23 kg-m, 20 in-lb)

Around neutral position (without

100

) fluctuation

Average “A”:

0.8 - 2.0 N.m (0.09 - 0.20 kg-m, 7 - 17 in-lb)

SGIA0160E

POWER STEERING GEAR

PS-27

Revision: 2006 August

2006 Murano

Install dial indicator (B) at 5mm (L) from the edge of housing (2),
and tooth point.

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), using Tool.

●

If reading is outside of the specification, readjust screw angle
with adjusting screw.

CAUTION:

●

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.

●

Do not turn adjusting screw more than twice.

●

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

14. Install large side of boot to gear housing assembly.

15. Install small side of boot to the mounting groove of inner socket

boot.

16. Install boot clamp to the small side of boot.

17. Install boot clamp to the large side of boot with the following procedure.

CAUTION:

Do not reuse boot clamp.

Tighten large side of RH/LH boot with boot clamp (stainless
steel wire).

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).

Twist boot clamp as shown in the figure, pay attention to rela-
tionship between winding and twisting directions.

Tool number

A: ST3127S000 (

—

)

Vertical movement

: 0.265 mm (0.0104 in)

SGIA1384E

SGIA0550E

Wire length “L”

: 390 mm (15.35 in)

SGIA0163E

SGIA0164E

PS-28

POWER STEERING GEAR

Revision: 2006 August

2006 Murano

Twisted point of clamp is in the opposite side of adjusting screw
(1) as shown in the hatched area in the figure (to prevent contact
with other parts).

Bent cut end of the wire toward rack axial as shown in the figure
after twisting the wire 4 to 4.5 turns so that cut end does not con-
tact with boot.

CAUTION:

Keep gap from cylinder tube 5 mm (0.20 in) or more.

18. Install cylinder tubes to gear housing assembly. Tighten the bolts

to the specified torque. Refer to

PS-20, "COMPONENT"

19. Install lock nut and outer socket to inner socket.

20. Adjust inner socket to standard length “L”, and then tighten lock

nut to the specified torque. Refer to

PS-20, "COMPONENT"

Check length of inner socket “L” again after tightening lock nut.
Make sure that the length is the standard.

CAUTION:

Adjust toe-in after this procedure. Length achieved after
toe-in adjustment is not necessary the above value.

Wire length “L”

: 40 mm (1.57 in) or less

SGIA1539E

STC0124D

SGIA0500E

Inner socket length “L”

: 147.7 mm (5.81 in)

SGIA0167E

POWER STEERING OIL PUMP

PS-29

Revision: 2006 August

2006 Murano

POWER STEERING OIL PUMP

PFP:49110

On-Vehicle Service

NGS000BM

RELIEF OIL PRESSURE

CAUTION:

Before starting work, confirm belt tension is proper.

Connect pressure gauge (SST) and pressure gauge adapter
(SST) between power steering oil pump discharge connector
and high pressure hose. Bleed air from the hydraulic circuit
while opening valve fully. Refer to

PS-7, "Air Bleeding Hydraulic

System"

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 exces-
sively.

●

Be careful not to contact hose with belt when engine is started.

Fully close the pressure gauge [SST] valve with engine at idle
and measure the relief oil pressure.

CAUTION:

Never keep valve closed for 10 seconds or longer.

Open the valve slowly after measuring. Repair power steering oil
pump is the relief oil pressure is outside the standard. Refer to

PS-30, "Disassembly and Assembly"

Apply Genuine Nissan PSF or equivalent to around O-ring (2),
then install eye-bolt (1). Install eye-bolt (1) with eye-joint
(assembled to high pressure hose) (B) protrusion (A) facing with
pump side cutout, and then tighten it to the specified torque after
tightening by hand. Refer to

PS-34, "Removal and Installation"

After inspection, disconnect the pressure gauge [SST] from
hydraulic circuit, then add fluid and bleed air. Refer to

PS-7, "Air

Bleeding Hydraulic System"

Tool number

: KV48103500 (J-26357 and J-26357-10)

Tool number

: KV48103500 (J-26357 and J-26357-10)

Relief oil pressure:

8,500 - 9,300 kPa (88 - 94 kg/cm

, 1,251 - 1,337 psi)

SGIA0570E

SGIA0501E

SGIA1379E

PS-30

POWER STEERING OIL PUMP

Revision: 2006 August

2006 Murano

Removal and Installation

NGS0003P

REMOVAL

Drain power steering fluid from reservoir tank.

Remove tires with power tool.

Remove side splash guard from vehicle with power tool.

Remove heat insulator from vehicle.

Loosen adjust screw and oil pump fixing bolt, then remove belt
from oil pump pulley. Refer to

EM-108, "ENGINE ASSEMBLY"

Remove piping of high pressure and low pressure (drain fluid
from their pipings). Refer to

PS-34, "Removal and Installation"

Remove mounting bolts, then remove power steering pump.

INSTALLATION

Note the following, and installation in the reverse order of removal.

●

Refer to

PS-34, "Removal and Installation"

about each tightening torque.

●

Install eye-bolt, high pressure hose and suction hose. Refer to

PS-34, "Removal and Installation"

●

Perform the following procedure after installing.

–

Adjust belt tension. Refer to

EM-13, "DRIVE BELTS"

–

Bleed air. Refer to

PS-7, "Air Bleeding Hydraulic System"

Disassembly and Assembly

NGS0003Q

COMPONENT

SGIA0502E

Rear cover

Gasket

Dowel pin

Cam ring

Rotor

Vane

Cartridge

Side plate

O-ring

10. Body assembly

11.

Oil seal

12. Drive shaft assembly

13. Snap ring

14.

Pulley

15. Spring washer

16. Bracket

17.

Suction pipe

18. O-ring

19. Washer

20.

Joint

21. Flow control valve

22. Spring

SGIA0827E

Nissan Murano Z50 (2006 year). Manual - part 180