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Nissan Murano Z50 (2005 year). Manual - part 199

POWER STEERING GEAR AND LINKAGE

PS-15

Revision: 2005 August

2005 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

Set wheels in the straight-ahead position.

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

Remove tires from vehicle with power tool.

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.

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

Steering gear assembly

Cotter pin

Rack mounting bracket

Rack mounting insulator

Sleeve

SGIA0486E

SGIA0471E

SGIA0487E

PS-16

POWER STEERING GEAR AND LINKAGE

Revision: 2005 August

2005 Murano

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.

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

Remove mounting bolt (lower side) of lower joint.

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

POWER STEERING GEAR AND LINKAGE

PS-17

Revision: 2005 August

2005 Murano

AWD

Set wheels in the straight-ahead position.

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

Remove tires from vehicle with power tool.

Remove undercover from vehicle with power tool.

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.

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

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

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

PS-18

POWER STEERING GEAR AND LINKAGE

Revision: 2005 August

2005 Murano

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 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-33, "HYDRAULIC LINE"

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

EM-107, "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-107, "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-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.

●

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.

●

After installation, bleed air from piping. Refer to

PS-7, "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.

SGIA0474E

SGIA0458E

SGIA0487E

POWER STEERING GEAR AND LINKAGE

PS-19

Revision: 2005 August

2005 Murano

Disassembly and Assembly

AGS000EQ

COMPONENTS

SGIA1397E

PS-20

POWER STEERING GEAR AND LINKAGE

Revision: 2005 August

2005 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

Remove cylinder tubes from gear housing assembly.

Remove rear cover cap from gear housing assembly.

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.

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

Outer socket

Boot clamp

Boot

Inner socket

Boot clamp (stainless wire)

Gear housing assembly

Rack oil seal

Rack assembly

Rack Teflon ring

10. O-ring A

11.

End cover assembly

12. Rear cover cap

13. Rear cover

14. O-ring B

15. Sub-gear assembly

16. Cylinder tubes

Refer to

GI-10, "Components"

, and the followings for the symbols in the figure.

: Apply Thread Locking Sealant, Three Bound TB1111 or equivalent.

: Apply multi-purpose grease.

: Apply Genuine NISSAN PSF or equivalent.

SGIA0500E

SGIA0568E

SGIA0826E

POWER STEERING GEAR AND LINKAGE

PS-21

Revision: 2005 August

2005 Murano

Remove O-ring B 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 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.

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

(suitable tool).

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 assem-

bly.

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 A 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.

SGIA0508E

STC0013D

SGIA0151E

SGIA0179E

PS-22

POWER STEERING GEAR AND LINKAGE

Revision: 2005 August

2005 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.

●

Check bearing while rotating it. Replace bearing 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

●

Hook a spring balance at the point shown in the figure. Confirm
if the reading is within the specification. When ball stud and
inner socket start moving the measured value must be within the
specification. If the reading is outside the specification, replace
socket.

Rotating Torque

●

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

SGIA0547E

Item

Outer socket

Inner socket

Measuring point

Cotter pin hole of stud

Shown as L: 83.2 mm (3.276 in)

Swing torque

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

1.0 - 7.8 N·m (0.11 - 0.79 kg-m, 9 - 69 in-lb)

Measuring value

4.84 - 46.7 N (0.5 - 4.8 kg, 1 - 10 lb)

12.1 - 93.7 N (1.2 - 9.6, kg, 3 - 21 lb)

Rotating torque

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

SST882B

POWER STEERING GEAR AND LINKAGE

PS-23

Revision: 2005 August

2005 Murano

Axial End Play

●

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 outside the standard, replace outer and inner sockets.

ASSEMBLY

Apply Nissan PSF or equivalent to O-ring A. Put an O-ring A into rack Teflon ring.
NOTE:
Do not reuse O-ring A.

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.

To fit rack Teflon ring on rack, use rack Teflon ring installation
tool (SST) from tooth side. Compress rim of ring with the tool.

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:

●

When inserting rack assembly, do not damage retainer
sliding part. If it is damaged, replace gear housing
assembly.

●

When inserting rack assembly, do not damage cylinder
inner wall. If it is damaged, it may cause oil leaks. Replace gear housing assembly.

●

Attach rack oil seal. Both inner lip and outer lip should
face each other.

Outer socket

0.5 mm (0.020 in) or less

Inner socket

0.2 mm (0.008 in) or less

SGIA1437E

SGIA0153E

SGIA0154E

SGIA0205E

PS-24

POWER STEERING GEAR AND LINKAGE

Revision: 2005 August

2005 Murano

To avoid damaging inner rack oil seal, wrap an OHP sheet
[approximately. 70 mm (2.76 in)

100 mm (3.94 in)] around rack

tooth. Place oil seal on sheet. Then, pull oil seal along with OHP
sheet until they pass the toothed section of rack, then remove it.

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.

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.

Install end cover assembly to rack, move it to gear housing
assembly.

Using a 45 mm (1.77 in) open head (suitable tool), tighten end
cover assembly to the specified torque.

CAUTION:

Do not damage rack surface. If it is damaged, it may cause
oil leaks. Replace rack assembly.

After tightening end cover assembly, caulk cylinder at one point
as shown in the figure using a punch. This will prevent end cover
from getting loose.

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 B. Install O-ring B to
rear cover.

NOTE:
Do not reuse O-ring B.

Use a rear cover wrench (SST) to install rear cover to gear housing assembly.

10. Confirm projection on rear cover cap nearly fit with marking position on gear housing assembly.

SGIA0155E

SGIA0569E

SGIA0157E

SGIA0158E

POWER STEERING GEAR AND LINKAGE

PS-25

Revision: 2005 August

2005 Murano

11. Apply thread locking adhesive (Three Bond TB1111B or equiva-

lent. Refer to

GI-47

) to the thread of adjusting screw to the

adjusting screw height from gear housing assembly. The adjust-
ing screw height is the same as it was measured in the overhaul
in advance.

12. Rotate ten times throughout whole range of rack so that parts fit

with each other.

13. Measure pinion rotating torque within from -180

to +180

, make

preload gauge (SST) and torque adapter (SST) in rack neutral
position, then hold preload gauge (SST) at maximum torque.

14. 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

15. Measure pinion rotating torque with torque adapter (SST) and

preload gauge (SST), then confirm whether their readings are
within the specified range. If the readings are not within the
specified ranges, readjust screw angle with adjusting screw.
Change gear assembly to new one, if the readings are still not
within the specified ranges, or the rotating torque of adjusting
screw is less than 5 N·m (0.51 kg-m, 44 in-lb).

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

17. Set dial gauge to rack as shown in the figure. Measure vertical

movement of rack when pinion is turned counterclockwise with
torque of 19.6 N·m (2.0 kg-m, 14 ft-lb). Check reading is within
the specified range. If reading is outside of specification, read-
just screw angle with adjusting screw. If reading is still outside 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 assem-
bly.

SGIA0568E

SGIA0483E

Pinion rotating torque:

Around neutral position (within

100

)

Average “A”:

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

Other than above (more than

100

)

Maximum variation “B”:

2.3 N·m (0.23 kg-m, 20 in-lb)

SGIA0160E

SGIA0484E

Amount of vertical movement with rack

Less than 0.265 mm (0.0104 in)

Measuring point

Shaft direction of rack

5 mm (0.20 in) away from end of gear housing assembly

Radius direction of rack

Shaft direction of adjusting screw

PS-26

POWER STEERING GEAR AND LINKAGE

Revision: 2005 August

2005 Murano

18. Install large-diameter side of boot to gear housing assembly.

19. Install small-diameter side of boot to the mounting groove of

inner socket boot.

20. Install boot clamp to the small-diameter side of boot.

21. Lock new larger boot clamp securely with a suitable tool.

NOTE:

●

Do not reuse boot clamp.

●

Secure boot band so that dimension “M” as shown in the fig-
ure satisfies the following:

22. Install cylinder tubes to gear housing assembly.

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

24. Tighten lightly tie-rod in specified length “L”, then tighten lock nut

at specified torque. Refer to

PS-19, "Disassembly and Assem-

bly"

. Reconfirm if tie-rod length is within limit of specified length

“L”.

CAUTION:

Perform toe-in adjustment after this procedure. Length
achieved after toe-in adjustment is not necessarily value
given here.

SGIA0550E

RAC1133D

Dimension “M”:

Max: 3.5 mm (0.138 in)

DSF0047D

Tightening torque:

19.7 - 26.4 N·m (2.0 - 2.6 kg-m, 15 - 19 in-lb)

SGIA0500E

Tie-rod length “L”

: 147.7 mm (5.81 in)

SGIA0167E

POWER STEERING OIL PUMP

PS-27

Revision: 2005 August

2005 Murano

POWER STEERING OIL PUMP

PFP:49110

On-Vehicle Inspection and Service

AGS000CR

CHECKING RELIEF OIL PRESSURE

CAUTION:

Before starting work, confirm belt tension is proper.

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.

Start engine. Allow engine to run until tank temperature reaches
50 to 80

C (122 to 176

F).

CAUTION:

●

Warm up engine with shut-off valve fully opened. If
engine is started with shut-off valve closed, fluid pres-
sure in power steering pump increases to maximum. This
will raise fluid temperature excessively.

●

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

With engine at idle, close shut-off valve and read the relief oil
pressure.

CAUTION:

Do not close shut-off valve of pressure gauge for more than
10 seconds.

After measurement, open shut-off valve slowly.

●

If relief oil pressure is outside the specification, disassemble
and repair oil pump. Refer to

PS-28, "Disassembly and

Assembly"

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-7, "Air Bleeding Hydraulic System"

Oil pump relief pressure:

8,500 - 9,300 kpa (86.7 - 94.9 kg/cm

, 1,233 - 1,349 psi)

SGIA0570E

SGIA0501E

PS-28

POWER STEERING OIL PUMP

Revision: 2005 August

2005 Murano

Removal and Installation

AGS000CS

REMOVAL

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-107,

"ENGINE ASSEMBLY"

Drain power steering fluid from reservoir tank.

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

PS-33,

"HYDRAULIC LINE"

Remove mounting bolts, then remove power steering pump.

INSTALLATION

Refer to

PS-33, "HYDRAULIC LINE"

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

●

After installation, adjust belt tension. Refer to

EM-13, "DRIVE BELTS"

●

After installation, bleed air. Refer to

PS-7, "Air Bleeding Hydraulic System"

Disassembly and Assembly

AGS000CT

COMPONENTS

SGIA0502E

Rear cover

Gasket

Lock 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

SGIA0827E

POWER STEERING OIL PUMP

PS-29

Revision: 2005 August

2005 Murano

INSPECTION BEFORE DISASSEMBLY

Disassemble power steering oil pump only if the following items are found.

●

Oil leakage from oil pump

●

Deformed or damaged pulley

●

Poor performance

DISASSEMBLY

NOTE:
Fix oil pump in vise as the occasion demands.

CAUTION:

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

Unscrew four rear cover bolts and remove rear cover from body assembly.

Remove gasket from body assembly.

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

Remove pulley from drive shaft.

Unscrew mounting bolts of bracket and 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.

Using a screwdriver, remove oil seal for 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.

10. Remove suction pipe from body assembly.
11. Remove O-ring for suction pipe.

19. Washer

20.

Joint

21. Flow control valve

22. Spring

SST010B

SST034A

SST036A

PS-30

POWER STEERING OIL PUMP

Revision: 2005 August

2005 Murano

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 assem-
bly with new one.

Relief Valve Assembly Inspection

●

Check relief valve assembly for damage. If any damage is found, replace it with new one.

ASSEMBLY

NOTE:
Fix oil pump in vise as vise occasion demands.

CAUTION:

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

Apply a coat of 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.

Apply a coat of Nissan PSF or equivalent to drive shaft, and
press drive shaft assembly into body assembly with suitable
tool, then install snap ring.

Apply a coat of Nissan PSF or equivalent to O-ring and install O-
ring into body assembly.

NOTE:
Do not reuse O-ring.

Install side plate to body assembly.

SST038A

SGIA0422E

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