Nissan Murano Z50 (2003 year). Manual — part 253
PS-22
POWER STEERING GEAR AND LINKAGE
Revision; 2004 April
2003 Murano
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.
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.
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 (0.50 - 4.7 kg, 4 - 34 lb)
12.1 - 93.7 N (1.3 - 9.5, kg, 9 - 69 lb)
Rotating torque
0.3 - 2.9 N·m (0.03 - 0.29 kg-m, 3 - 25 in-lb)
SST882B
Outer socket
0.5 mm (0.02 in) or less
Inner socket
0.2 mm (0.008 in) or less
SGIA0057E
POWER STEERING GEAR AND LINKAGE
PS-23
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Revision; 2004 April
2003 Murano
ASSEMBLY
1.
Apply Nissan PSF II or equivalent to O-ring. Put an O-ring into rack Teflon ring.
NOTE:
Do not reuse O-ring.
2.
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.
3.
To fit rack Teflon ring on rack, use rack Teflon ring installation
tool 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:
●
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.
SGIA0153E
SGIA0154E
SGIA0205E
PS-24
POWER STEERING GEAR AND LINKAGE
Revision; 2004 April
2003 Murano
a.
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.
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, move it to gear housing assembly.
5.
Using a 45 mm (1.77 in) open head (SST), 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.
6.
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.
7.
Install sub-gear assembly to gear housing assembly.
CAUTION:
In order to protect oil seal from any damage, insert sub-gear assembly out straightly.
8.
Apply Nissan PSF II or equivalent to O-ring. Install O-ring to rear cover.
SGIA0155E
SGIA0569E
SGIA0157E
Tightening torque
: 58.9 - 73.5 N·m (6.0 - 7.4 kg-m, 44 - 54 ft-lb)
SGIA0158E
POWER STEERING GEAR AND LINKAGE
PS-25
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Revision; 2004 April
2003 Murano
NOTE:
Do not reuse O-ring.
9.
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.
11. Apply thread locking adhesive (Three Bond TB1111B or equiva-
lent. Refer to
) 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.
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
PS-26
POWER STEERING GEAR AND LINKAGE
Revision; 2004 April
2003 Murano
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.
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:
SGIA0484E
Amount of vertical movement with rack
Less than 0.265 mm (0.010 in)
Measuring point
Shaft direction of rack
5 mm (0.197 in) away from end
of gear housing assembly
Radius direction of rack
Shaft direction of adjusting
screw
SGIA0550E
RAC1133D
Dimension “M”:
Max: 3.5 mm (0.138 in)
DSF0047D
POWER STEERING GEAR AND LINKAGE
PS-27
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Revision; 2004 April
2003 Murano
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
PS-19, "Disassembly and Assem-
. 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.
Tightening torque:
19.7 - 26.4 N·m (2.0 - 2.6 kg-m, 15 - 19 in-lb)
SGIA0500E
Tie-rod length “L”
: 135.2 mm (5.32 in)
SGIA0167E
PS-28
POWER STEERING OIL PUMP
Revision; 2004 April
2003 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.
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:
●
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.
●
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.
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
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
AGS000CS
REMOVAL
1.
Remove tires with power tool.
2.
Remove side splash guard from vehicle with power tool.
SGIA0570E
Relief oil pressure:
8,000 - 8,800 kPa (81.60 - 89.76 kg/cm
2
, 1160 - 1276 psi)
SGIA0501E
POWER STEERING OIL PUMP
PS-29
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Revision; 2004 April
2003 Murano
3.
Remove heat insulator from vehicle.
4.
Loosen adjust screw and oil pump fixing bolt, then remove belt from oil pump pulley. Refer to
5.
Drain power steering fluid from reservoir tank.
6.
Remove piping of high pressure and low pressure (drain fluid from their pipings). Refer to
7.
Remove mounting bolts, then remove power steering pump.
INSTALLATION
Refer to
for tightening torque. Install in the reverse order of removal.
●
After installation, adjust belt tension. Refer to
●
After installation, bleed air. Refer to
PS-6, "Air Bleeding Hydraulic System"
Disassembly and Assembly
AGS000CT
SGIA0502E
1.
Rear cover
2.
Gasket
3.
Lock pin
4.
Cam ring
5.
Rotor
6.
Vane
7.
Cartridge
8.
Side plate
9.
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
SGIA0503E
PS-30
POWER STEERING OIL PUMP
Revision; 2004 April
2003 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.
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.
4.
Remove pulley from drive shaft.
5.
Unscrew mounting bolts of bracket and remove bracket from body assembly.
6.
Remove snap ring from drive shaft assembly and press out it.
CAUTION:
When removing snap ring, be careful not to damage drive
shaft assembly.
7.
Using a screwdriver, remove oil seal for body assembly.
8.
Remove O-ring from body assembly.
9.
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.
SST010B
SST034A
SST036A
POWER STEERING OIL PUMP
PS-31
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Revision; 2004 April
2003 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.
1.
Apply a coat of Nissan PSF II 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 Nissan PSF II or equivalent to drive shaft, and press drive shaft assembly into body
assembly with suitable tool, then install snap ring.
3.
Apply a coat of Nissan PSF II or equivalent to O-ring and install O-ring into body assembly.
NOTE:
Do not reuse O-ring.
4.
Install side plate to body assembly.
SST038A
SGIA0422E
PS-32
POWER STEERING OIL PUMP
Revision; 2004 April
2003 Murano
5.
Install lock pin into lock pin hole, and install cam-ring as shown
in the figure.
●
When installing cam-ring, turn carved face with a letter on 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.
6.
Install rotor to body assembly.
●
When installing rotor, turn punch mark face on rotor to body
assembly.
7.
Install vane to rotor with arc of vane in contact with cam ring.
8.
Check if drive shaft assembly turns smoothly.
9.
Install gasket to body assembly.
NOTE:
Do not reuse gasket.
SGIA0423E
SGIA0424E
SST843A
POWER STEERING OIL PUMP
PS-33
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Revision; 2004 April
2003 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.
NOTE:
Do not reuse washer.
14. Apply a coat of Nissan PSF II or equivalent to O-ring and Install O-ring to suction pipe.
15. Install suction pipe to body assembly.
SGIA0425E
PS-34
HYDRAULIC LINE
Revision; 2004 April
2003 Murano
HYDRAULIC LINE
PFP:49721
Components
AGS000CU
SGIA0505E
HYDRAULIC LINE
PS-35
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Revision; 2004 April
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Removal and Installation
AGS000F5
●
Refer to
for tightening torque. Install in the reverse order of removal.
NOTE:
Refer to component parts location and do not reuse non-reusable parts.
●
Ensure that hose touches spool of tube when tube is to be
inserted to hose.
CAUTION:
Do not apply power steering fluid to the junction surface
between tube and hose.
●
To install eye joint, join projection of eye joint into notch of power
steering pump, and attach eye joint to power steering pump
properly. Then, fully tighten eye bolt by hands, and tighten it to a
specified torque.
●
Connect harness connector into pressure sensor securely.
1.
Reservoir tank
2.
Reservoir tank bracket
3.
Suction hose
4.
High pressure hose
5.
Oil pump
6.
Steering gear assembly
7.
Eye bolt
8.
Oil pressure sensor
9.
Copper washer
10.
Clamp
11. Eye joint
SGIA0514E
SGIA0515E
PS-36
SERVICE DATA AND SPECIFICATIONS (SDS)
Revision; 2004 April
2003 Murano
SERVICE DATA AND SPECIFICATIONS (SDS)
PFP:00030
Steering Wheel
AGS000CV
Steering Angle
AGS000CW
Steering Column
AGS000CX
Steering Outer Socket and Inner Socket
AGS000CY
Steering wheel axial end play
0 mm (0 in)
Steering wheel free play
0 - 35 mm (0 - 1.38 in)
Tire size
18 inch
Inner wheel
Degree minute (Decimal degree)
Minimum
35
°
00
′
(35.0
°
)
Nominal
38
°
00
′
(38.0
°
)
Maximum
39
°
00
′
(39.0
°
)
Outer wheel
Degree minute (Decimal degree)
Nominal
31
°
30
′
(31.5
°
)
Steering column length “L1”
181 - 183 mm (7.13 - 7.20 in)
Steering column length “L2”
240.4 - 244.8 mm (9.46 - 9.64 in)
SGIA0475E
Steering gear type
PR26AM
Tie-rod outer ball joint
Swinging torque
0.3 - 2.9 N·m (0.03 - 0.29 kg-m, 3 - 25 in-lb)
Measurement on spring balance
●
Measuring point: cotter pin hole of stud
4.84 - 46.7 N (0.50 - 4.7 kg, 4 - 34 lb)
Rotating torque
0.3 - 2.9 N·m (0.03 - 0.29 kg-m, 3 - 25 in-lb)
Axial end play
0.5 mm (0.02 in) or less
Tie-rod inner ball joint
Swinging torque
1.0 - 7.8 N·m (0.11 - 0.79 kg-m, 9 - 69 in-lb)
Measurement on spring balance
●
Measuring point: L mark see below,
L=83.2 mm (3.276 in).
12.1 - 93.7 N (1.3 - 9.5 kg, 9 - 69 lb)
Axial end play
0.2 mm (0.008 in) or less
SGIA0547E
SERVICE DATA AND SPECIFICATIONS (SDS)
PS-37
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Revision; 2004 April
2003 Murano
Steering Gear
AGS000CZ
Oil Pump
AGS000D0
Steering Fluid
AGS000D1
Tie-rod length “L”
135.2 mm (5.32 in)
SGIA0167E
Steering gear model
PR26AM
Rack neutral position, dimension “L” (rack stroke)
71.5 mm (2.815 in)
Rack sliding force
At the neutral point:
Range within
±
11.5 mm (
±
0.453in)
from the neutral position
(in power ON)
Area average
value
215.8 - 274.6 N (22 - 28 kg, 160 - 202 lb) (2WD model)
225.4 - 284.2 N (23 - 28 kg, 167 - 209 lb) (AWD model)
Allowable variation
98 N (10 kg, 22 lb) or less
Whole area (in power OFF)
Peak value
294 N (30.0 kg, 66 lb) or less
Allowable variation
147 N (16 kg, 35 lb) or less
SGIA0549E
Oil pump relief hydraulic pressure
8,000 - 8,800 kPa (81.60 - 89.76 kg/cm
2
, 1160 - 1276 psi)
Fluid capacity
Approx. 1.0
(1-1/8 US qt, 7/8 Imp qt)
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