Nissan Murano Z50 (2007 year). Manual

POWER STEERING GEAR

PS-23

Revision: 2006 July

2007 Murano

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.

SST081B

SGIA0151E

SGIA0179E

PS-24

POWER STEERING GEAR

Revision: 2006 July

2007 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.

Pinion 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

POWER STEERING GEAR

PS-25

Revision: 2006 July

2007 Murano

ASSEMBLY

CAUTION:

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

Apply recommended fluid 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 recommended 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

PS-26

POWER STEERING GEAR

Revision: 2006 July

2007 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 pinion assembly to gear housing assembly.

CAUTION:

In order to protect oil seal from any damage, insert pinion
assembly out straightly.

Apply recommended fluid 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

SGIA0871E

Tool number

A: KV48104400 (J-46213)

SGIA1542E

POWER STEERING GEAR

PS-27

Revision: 2006 July

2007 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

PS-28

POWER STEERING GEAR

Revision: 2006 July

2007 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

SGIA1325E

Wire length “L”

: 390 mm (15.35 in)

SGIA0163E

SGIA0164E

POWER STEERING GEAR

PS-29

Revision: 2006 July

2007 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-21, "COMPONENTS"

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-21, "COMPONENTS"

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

PS-30

POWER STEERING OIL PUMP

Revision: 2006 July

2007 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-8, "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-32, "Disassembly and Assembly"

Apply recommended fluid 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-36, "Removal and Installation"

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

PS-8, "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

POWER STEERING OIL PUMP

PS-31

Revision: 2006 July

2007 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-36, "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-36, "Removal and Installation"

about each tightening torque.

●

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

PS-36, "Removal and Installation"

●

Perform the following procedure after installing.

–

Adjust belt tension. Refer to

EM-13, "DRIVE BELTS"

–

Bleed air. Refer to

PS-8, "Air Bleeding Hydraulic System"

SGIA0502E

PS-32

POWER STEERING OIL PUMP

Revision: 2006 July

2007 Murano

Disassembly and Assembly

NGS0003Q

COMPONENTS

DISASSEMBLY

NOTE:
Secure oil pump in a vise if necessary.

CAUTION:

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

Remove rear cover mounting bolts and then remove rear cover from body assembly.

Remove gasket from body assembly.

Remove dowel pin, cartridge and side plate from body assembly.

Remove pulley mounting nut and then remove pulley from drive shaft.

Remove bracket mounting bolts and then remove bracket from body assembly.

Remove snap ring from drive shaft assembly and press out it.

CAUTION:

When removing snap ring, be careful not to damage drive
shaft assembly.

Spring washer

Pulley

Snap ring

Drive shaft

Oil seal

Bracket

Suction hose

O-ring

Body assembly

10. Copper washer

11.

Joint

12. Flow control valve

13. Spring

14.

O-ring

15. Side plate

16. Cartridge

17.

Vane

18. Rotor

19. Cam ring

20.

Dowel pin

21. Gasket

22. Rear cover

Refer to

GI-10, "Components"

, and the followings for the symbols in the figure.

: Apply power steering fluid.

: Apply multi-purpose grease

SGIA1688E

SST010B

POWER STEERING OIL PUMP

PS-33

Revision: 2006 July

2007 Murano

Remove oil seal from body assembly using a flat-bladed screw-
driver.

CAUTION:

Do not damage body assembly.

Remove O-ring from body assembly.

Loosen eye bolt and remove joint and washer, then pull out flow
control valve and spring from body assembly.

CAUTION:

Be careful not to drop and deform the flow control valve.

10. Remove suction hose from body assembly.

11. Remove O-ring for suction hose.

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.

Side Plate Inspection

Check side plate for damage. Replace side plate if there are.

Flow Control Valve Inspection

Check flow control valve and spring for damage. Replace if there are.

ASSEMBLY

NOTE:
Secure oil pump in a vise if necessary.

CAUTION:

Use copper plates when securing in a vise.

Apply recommended grease to oil seal lips (1). Apply recom-
mended fluid to around oil seal, and then install oil seal to body
assembly.

CAUTION:

Do not reuse oil seal

Apply recommended fluid to drive shaft, and press drive shaft
into body assembly, then install snap ring.

CAUTION:

Do not reuse snap ring.

Apply recommended fluid to O-ring, and install O-ring into body
assembly.

CAUTION:

Do not reuse O-ring.

SST034A

SST036A

SGIA1150E

PS-34

POWER STEERING OIL PUMP

Revision: 2006 July

2007 Murano

Install side plate to body assembly.

Install dowel pin (3) into dowel pin hole (A), and install cam ring
(2) pointing it's D1 side toward the body assembly (1) side as
shown in the figure.

CAUTION:

●

When installing cam-ring, turn carved face with a letter E
(B) of it to rear cover.

●

Do not confuse the assembling direction of cam ring. If
cam ring is installed facing the incorrect direction, it may
cause pump operation malfunction.

Install rotor to body assembly.

CAUTION:

When installing rotor, turn punch mark face on rotor to
body assembly.

Install vane to rotor with arc of vane in contact with cam ring.

Check if drive shaft assembly turns smoothly.

Install gasket to body assembly.

CAUTION:

Do not reuse gasket.

SGIA0422E

SGIA1166E

SGIA0424E

SST843A

POWER STEERING OIL PUMP

PS-35

Revision: 2006 July

2007 Murano

10. Install rear cover to body assembly and tighten bolts to the spec-

ified torque.

11. Install bracket to body assembly, and tighten the two mounting

bolts to the specified torque.

12. Install pulley to drive shaft assembly, then tighten lock nut to the

specified torque.

13. Install spring, flow control valve, washer, joint and eye bolt to

body assembly. Then tighten eye bolt to the specified torque.

CAUTION:

Does not reuse spring and washer.

14. Apply recommended fluid to O-ring and Install O-ring to suction

hose.

CAUTION:

Do not reuse O-ring.

15. Install suction hose to body assembly.

SGIA0425E

PS-36

HYDRAULIC LINE

Revision: 2006 July

2007 Murano

HYDRAULIC LINE

PFP:49721

Removal and Installation

NGS0003R

Refer to the figure for tightening torque. Install in the reverse order of removal.

Reservoir tank

Reservoir tank bracket

Suction hose

High-pressure hose

Oil pump assembly

Steering gear assembly

Eye-bolt

Pressure sensor

Copper washer

SGIA1167E

HYDRAULIC LINE

PS-37

Revision: 2006 July

2007 Murano

CAUTION:

●

Securely insert harness connector to pressure sensor.

●

Do not reuse O-ring (2)

●

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 pres-
sure hose) (B) protrusion (A) facing with pump side cutout,
and then tighten it to the specified torque after tightening
by hand. Refer to

PS-36, "Removal and Installation"

●

Do not apply fluid to hose (2) and tube (1).

●

Insert hose (2) securely until it contacts spool (A) of tube
(1).

●

Install clamp (3) to hose (2) at 3 to 8 mm (L) from the edge of
the hose (2).

●

Confirm with mating marking that if it is in phase with hose
and clamp, then correct if needs.

10. Clamp

11.

Eye-joint

12. O-ring

13. Low pressure piping

14. High pressure piping

Refer to

GI-10, "Components"

and the followings for the symbols in the figure.

: Nissan PSF or equivalent.

SGIA1379E

SGIA1380E

SGIA0563E

PS-38

SERVICE DATA AND SPECIFICATIONS (SDS)

Revision: 2006 July

2007 Murano

SERVICE DATA AND SPECIFICATIONS (SDS)

PFP:00030

General Specifications

NGS000BF

Inspection and Adjustment

NGS000BG

STEERING WHEEL AXIAL END PLAY AND PLAY

Unit: mm (in)

STEERING WHEEL TURNING FORCE

Unit: N·m (kg-m, in-lb)

STEERING COLUMN LENGTH

Unit: mm (in)

STEERING ANGLE

Unit: Degree minute (Decimal degree)

Applied model

VQ35DE

Steering gear model

PR26AM

Fluid capacity (Approx.)

(US qt, lmp qt)

1.0 (1-1/8, 7/8)

Relief oil pressure

kPa (kg/cm

, psi)

8,500 - 9,300 (88 - 94, 1,251 - 1,337)

Item

Standard

End play of the axial direction for steering wheel

0 (0)

Steering wheel play on the outer circumference

0 - 35 (0 - 1.37)

Item

Standard

Steering wheel turning force

7.45 (0.76, 66) or less

Item

Standard

Steering column length “L

”

182 mm (7.17 in)

Steering column length “L

”

242.6 mm (9.55 in)

SGIA0475E

Item

Standard

Inner wheel

Minimum

′

(34.5

)

Nominal

′

(38.0

)

Maximum

′

(39.0

)

Outer wheel

Nominal

′

(31.5

)

Nissan Murano Z50 (2007 year). Manual - part 156