NISSAN NAVARA 2005 Repair Workshop Manual

PS-14
POWER STEERING GEAR AND LINKAGE
POWER STEERING GEAR AND LINKAGE
PFP:49001
Removal and InstallationEGS001LJ
COMPONENT
CAUTION:
Spiral cable may be cut if steering wheel turns while separating steering column assembly and steer-
ing gear assembly. Be sure to secure steering wheel using string to avoid turning.
REMOVAL
1. Set vehicle to the straight-ahead position.
2. Remove tyres from vehicle with a power tool.
3. Remove undercover from vehicle with a power tool.
4. Remove lower side fixing bolt of lower shaft.
5. Remove cotter pin (1), and then loosen the nut.
6. Remove steering outer socket (2) from steering knuckle (3) so
as not to damage ball joint boot (4) 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.
1. Cotter pin 2. Steering gear assembly 3. Rack mounting bracket
4. Rack mounting insulator 5. Washer 6. RHD models
Refer toGI-10, "
Components"for the symbols in the figure.
SGIA1315E
SGIA1183E

POWER STEERING GEAR AND LINKAGE
PS-15
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PS
7. Remove high and low pressure piping of hydraulic piping, and
then drain power steering fluid. Refer toPS-6, "
POWER
STEERING FLUID".
8. Remove steering hydraulic piping bracket from front suspension
member. Refer toPS-30, "
HYDRAULIC LINE".
9. Remove mounting bolts and nuts of steering gear assembly, and
then remove steering gear assembly, rack mounting bracket,
rack mounting insulator and washer from vehicle.
INSTALLATION
lInstallation is the reverse order of removal. For tightening torque, refer toPS-14, "COMPONENT".
lWhen 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 pinion 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.
lAfter installation, bleed air from the steering hydraulic system.
Refer toPS-6, "
Air Bleeding Hydraulic System".
lPerform final tightening of nuts and bolts on each part under
unladen conditions with tyres on level ground when removing
steering gear assembly. Check wheel alignment. Refer toFSU-
7, "Front Wheel Alignment".
INSPECTION AFTER INSTALLATION
Make sure that steering wheel operates smoothly by turning several times from full left stop to full right stop.
LGIA0032E
SGIA1140E

PS-16
POWER STEERING GEAR AND LINKAGE
Disassembly and Assembly
EGS001LK
COMPONENT
CAUTION:
lDisassemble and assemble steering gear assembly by securing the mounting area in a vise using
copper plates.
lClean steering gear assembly with kerosene before disassembling. Be careful to avoid splashing
or applying any kerosene over connector of discharge port or return port.
1. Outer socket 2. Boot clamp 3. Boot
4. Inner socket 5. Boot clamp 6. Gear housing assembly
7. Cylinder tubes 8. Rear cover cap 9. Rear cover
10. O-ring A 11. Pinion assembly 12. Rack oil seal
13. Rack assembly 14. Rack Teflon ring 15. O-ring B
16. End cover assembly
Refer toGI-10, "
Components"and the followings for the symbols in the figure.
:
Apply Type DEXRON
TMIII or equivalent.
:A p p l y G e n u i n e T h r e a d L o c k i n g S e a l a n t , T h r e e B o u n d T B 1111 o r e q u i v a l e n t .
:Apply multi-purpose grease.
SGIA1349E

POWER STEERING GEAR AND LINKAGE
PS-17
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PS
DISASSEMBLY
1. Remove cylinder tubes from gear housing assembly.
2. Remove rear cover cap from gear-sub assembly.
3. Using a rear cover wrench [SST: KV489Q0030] (A) to remove
rear cover from pinion assembly.
4. Remove O-ring A using a flat-bladed screwdriver, and pull out
rear cover.
5. Measure adjusting screw height “H”, and loosen adjusting
screw.
CAUTION:
lDo not loosen adjusting screw 2 turns or more.
lReplace steering gear assembly if adjusting screw is
loosened 2 turns or more and it is removed.
6. Remove pinion assembly from gear housing assembly.
7. Loosen outer socket lock nut, and remove outer socket.
8. 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.
9. Remove inner socket from gear housing assembly.
10. Drill out the clinching part of gear housing assembly (end cover
assemblyside)outerrimwitha3mm(0.12in)drillbit.[Drillfor
approximately 1.5 mm (0.059 in) depth.]
SGIA1331E
SGIA0508E
SGIA0624E
STC0013D

PS-18
POWER STEERING GEAR AND LINKAGE
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 dam-
aged because it may cause fluid leakage.
13. Heat rack Teflon ring to approximately 40°C(104°F) with a
dryer, and remove rack Teflon ring and O-ring B from rack
assembly.
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.
INSPECTION AFTER DISASSEMBLY
Boot
Check boot for cracks, and replace it if a malfunction is detected.
Rack Assembly
Check rack for damage or wear, and replace it if a malfunction is detected.
Pinion Assembly
lCheck pinion assembly for damage or wear, and replace it if a malfunction is detected.
lRotate pinion and check for torque variation or rattle, and replace it if a malfunction is detected.
Gear Housing Assembly
Check gear housing assembly for damage and scratches (inner wall). Replace if there are.
Outer Socket and Inner Socket
1. Ball joint swinging torque
SST081B
SGIA0151E
SGIA0179E

POWER STEERING GEAR AND LINKAGE
PS-19
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PS
lHook 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 assem-
bly if they are outside the standard.
2. Ball joint rotating torque
lMake sure that the reading is within the following specified
range using the preload gauge [SST]. Replace outer socket if
the reading is outside the specified value.
3. Ball joint axial end play
lApply 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.
SGIA0896E
Items Outer socket Inner socket
Measuring point of spring balance Stud cotter pin mounting holeMeasuring point at *mark
shown in the figure
Swinging torque0.3 - 2.9 N·m
(0.03 - 0.29 kg-m, 3.0 - 25 in-lb)1.0-7.8N·m
(0.11 - 0.79 kg-m, 9.0 - 69 in-lb)
Spring balance measurement4.84 - 46.7 N
(0.5 - 4.8 kg, 1.1 - 10.6 lb)12.1 - 93.7 N
(1.2 - 9.6 kg, 2.6 - 21.2 lb)
Outer socket
rotating torque0.3 - 2.9 N·m
(0.03 - 0.29 kg-m, 3.0 - 25 in-lb
SGIA0083E
Outer socket 0.5 mm (0.020 in) or less
Inner socket 0.2 mm (0.008 in) or less
SGIA0057E

PS-20
POWER STEERING GEAR AND LINKAGE
ASSEMBLY
1. Apply recommended fluid to O-ring B. Put an O-ring B into a rack Teflon ring.
2. Heat rack Teflon ring to approximately 40°C(104°F) with a
dryer. Assemble it to mounting groove of rack assembly.
3. Install the Teflon ring correcting tool [SST: KV489Q0020] (A)
from tooth side of rack to fit rack Teflon ring (1) on rack. Com-
press the ring with tool.
4. 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:
lInstall rack oil seal in a direction so that the lip of inner oil
seal and the lip of outer oil seal face each other.
lDo not damage retainer sliding surface by rack assembly.
Replace gear housing assembly if damaged.
lDo not damage gear housing assembly inner wall by rack
assembly. Gear housing assembly must be replaced if
damaged because it may cause fluid leakage.
a. 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
SGIA1324E
SGIA0205E
SGIA0155E

POWER STEERING GEAR AND LINKAGE
PS-21
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PS
b. Insert rack oil seal (inner) into rack assembly piston (rack Teflon
ring).
c. 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.
d. 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.
e. Install end cover assembly to rack edge, and move rack oil seal
(outer) until it contacts with gear housing assembly.
5. 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.
6. 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.
7. Install pinion assembly to gear housing assembly.
CAUTION:
In order to protect rack oil seal from any damage, insert pin-
ion assembly out straightly.
8. Apply recommended fluid to O-ring A. Install O-ring A to rear
cover.
9. Using a rear cover wrench [SST: KV489Q0030] (A), install rear
cover to gear housing assembly.
SGIA0671E
SGIA0157E
SST081B
SGIA0871E
SGIA1331E

PS-22
POWER STEERING GEAR AND LINKAGE
10. Decide on the neutral position for the rack.
11. Install rear cover cap to gear sub-assembly.
CAUTION:
Make sure that the projection of rear cover cap is aligned
with the marking position of gear housing assembly.
12. Apply recommended thread locking sealant to the thread (2
turns thread), and then screw in the adjusting screw until it
reaches height “H” from gear housing assembly measured
before disassembling.
13. Move rack assembly 10 strokes throughout the full stroke so that
the parts can fit with each other.
14. Measure pinion rotating torque within±180°of neutral position
of the rack assembly using the preload gauge [SST] and preload
adapter [SST]. Stop the gear at the point where highest torque is
read.
15. Loosen adjusting screw and retighten to 5.4 N·m (0.55 kg-m, 48
in-lb), and then loosen by 20 to 40°.
16. Measure pinion rotating torque using the preload adapter [SST]
and preload gauge [SST] to make sure that the measured value
is within the standard. Readjust if the value is outside the stan-
dard. 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.
17. Apply recommended thread locking sealant to inner socket and turn pinion fully to left with inner socket
installed to gear housing assembly.Rack stroke : 84 mm (3.31 in)
SGIA0877E
SGIA0624E
STC0036D
Pinion rotating torque standard
Around neutral position
(within±100°)AverageA0.8 - 2.0 N·m
(0.09 - 0.20 kg-m, 7.0 - 17 in-lb)
Maximum variation B 2.3 N·m (0.23 kg-m, 20 in-lb)
SGIA0936E

POWER STEERING GEAR AND LINKAGE
PS-23
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PS
18. Set dial gauge as shown in the figure. Measure vertical move-
ment of rack assembly when pinion is turned clockwise with
torque of 19.6 N·m (2.0 kg-m, 14 ft-lb). Readjust adjusting screw
angle if the measured value is outside the standard. Replace
steering gear assembly if the measured value is still outside the
standard or adjusting screw rotating torque is 5 N·m (0.51 kg-m,
44 in-lb) or less.
19. Install large end of boot to gear housing assembly.
20. Install small end of boot to inner socket boot mounting groove.
21. Install boot clamps to boots, as shown in the figure.
SGIA1147E
Measuring pointRack axial direction 5 mm (0.20 in) from housing end surface
Rack radial direction Axial direction of the adjusting screw
Vertical movement 0.265 mm (0.0104 in)
SGIA1325E
AST139