lock NISSAN PATROL 1998 Y61 / 5.G Front Suspension Workshop Manual

FRONT AXLE &
FRONT SUSPENSION
SECTION
FA
CONTENTS
PRECAUTIONS AND PREPARATION............................1
Precautions ..................................................................1
Special Service Tools ..................................................1
Commercial Service Tools ...........................................2
NOISE, VIBRATION AND HARSHNESS (NVH)
TROUBLESHOOTING.....................................................3
NVH Troubleshooting Chart.........................................3
FRONT AXLE AND FRONT SUSPENSION...................4
ON-VEHICLE SERVICE..................................................5
Front Axle and Front Suspension Parts ......................5
Front Wheel Bearing....................................................5
Front Wheel Alignment ................................................8
FRONT AXLE Ð Drive ¯ange and Free-running
Hub.................................................................................10
FRONT AXLE Ð Manual-lock Free-running Hub...... 11
Removal ..................................................................... 11
Installation ..................................................................12
Inspection...................................................................12
FRONT AXLE Ð Auto-lock Free-running Hub..........13
Removal .....................................................................13
Installation ..................................................................13FRONT AXLE Ð Wheel Hub and Rotor Disc............14
Removal and Installation ...........................................14
Inspection...................................................................15
Assembly ...................................................................15
FRONT AXLE Ð Knuckle Flange................................17
Removal .....................................................................17
Inspection...................................................................19
Installation ..................................................................19
Knuckle Flange Grease Seal.....................................21
FRONT AXLE Ð Drive Shaft.......................................23
Inspection...................................................................23
Installation ..................................................................23
FRONT SUSPENSION..................................................24
Shock Absorber .........................................................25
Stabilizer Bar .............................................................25
Coil Spring .................................................................25
Leading Arm...............................................................26
Panhard Rod..............................................................26
SERVICE DATA AND SPECIFICATIONS (SDS)..........27
General Speci®cations ...............................................27
Inspection and Adjustment ........................................27
FA

Precautions
+When installing rubber parts, ®nal tightening must be car-
ried out under unladen condition* with tires on ground.
* Fuel, radiator coolant and engine oil full. Spare tire, jack,
hand tools and mats in designated positions.
+Use ¯are nut wrench when removing and installing brake
tubes.
+After installing removed suspension parts, check wheel
alignment and adjust if necessary.
+Always torque brake lines when installing.
Special Service Tools
Tool number
Tool nameDescription
ST29020001
Gear arm puller
NT551
Removing tie-rod and drag link
a: 34 mm (1.34 in)
b: 6.5 mm (0.256 in)
c: 61.5 mm (2.421 in)
KV401021S0
Bearing race drift
NT153
Installing wheel bearing outer race
KV40105400
Wheel bearing
lock nut wrench
NT154
Removing and installing wheel bearing lock
nut
GG94310000
Flare nut torque wrench
NT406
Removing and installing brake piping
a: 10 mm (0.39 in)
SBR820BA
PRECAUTIONS AND PREPARATION
FA-1

PRELOAD ADJUSTMENT
Adjust wheel bearing preload after wheel bearing has been
replaced or front axle has been reassembled.
Adjust wheel bearing preload as follows:
1. Before adjustment, thoroughly clean all parts to prevent dirt
entry.
2. Apply multi-purpose grease sparingly to the following parts:
+Wheel hub (as shown at left)
+Wheel bearing
+Grease seal lip
+Contact surface between wheel bearing lock washer (cham-
fered side) and outer wheel bearing
3. Tighten wheel bearing lock nut with Tool.
: 167 - 196 Nzm (17 - 20 kg-m, 123 - 145 ft-lb)
4. Turn wheel hub several times in both directions.
5. Loosen wheel bearing lock nut so that torque becomes0Nzm
(0 kg-m, 0 ft-lb).
6. Retighten wheel bearing lock nut with Tool.
:3-5Nzm (0.3 - 0.5 kg-m, 26 - 43 in-lb)
SFA853B
SFA469A
FA781
SFA748BA
ON-VEHICLE SERVICE
Front Wheel Bearing (Cont'd)
FA-6

7. Turn wheel hub several times in both directions.
8. Retighten wheel bearing lock nut with Tool.
:3-5Nzm (0.3 - 0.5 kg-m, 26 - 43 in-lb)
9. Again turn wheel hub several times in both directions.
10. Measure starting force ``A'' at wheel hub bolt.
11. Tighten lock nut until screw hole is aligned with screw hole in
lock washer. Lock washer may be used with either side up.
Temporarily tighten lock washer using screw.
12. Turn wheel hub several times in both directions.
13. Measure starting force ``B'' at wheel hub bolt. Refer to proce-
dure 10.
14. Wheel bearing preload ``C'' can be calculated as shown below.
C=BþA
Wheel bearing preload ``C'':
0 - 18.6 N (0 - 1.9 kg, 0 - 4.2 lb)
15. If wheel bearing preload ``C'' is outside speci®cations, loosen
lock nut and adjust wheel bearing preload ``C'' to 0 to 18.6 N
(0 to 1.9 kg, 0 to 4.2 lb) range.
16. Measure wheel bearing axial end play.
Axial end play:
0mm(0in)
17. Tighten screw.
: 1.2 - 1.8 Nzm (0.12 - 0.18 kg-m, 10.4 - 15.6 in-lb)
18. Recheck to ensure that wheel bearing preload and axial end
play are within speci®ed ranges.
SFA854B
SFA855B
SFA470AA
SFA856B
SFA470AA
ON-VEHICLE SERVICE
Front Wheel Bearing (Cont'd)
FA-7

TOE-IN
Measure toe-in using the following procedure.
WARNING:
+Always perform the following procedure on a ¯at surface.
+Make sure that no person is in front of the vehicle before
pushing it.
1. Bounce front of vehicle up and down to stabilize the posture.
2. Push the vehicle straight ahead about 5 m (16 ft).
3. Put a mark on base line of the tread (rear side) of both tires at
the same height of hub center. This mark is a measuring point.
4. Measure distance ``A'' (rear side).
5. Push the vehicle slowly ahead to rotate the wheels 180 degrees
(1/2 turn).
If the wheels have rotated more than 180 degrees (1/2 turn), try
the above procedure again from the beginning. Never push
vehicle backward.
6. Measure distance ``B'' (front side).
Total toe-in:
Refer to SDS (FA-27).
7. Adjust toe-in by varying the length of steering tie-rod.
(1) Loosen lock nuts.
(2) Adjust toe-in by screwing tie-rod in and out.
Make sure both tie-rods are the same length.
(3) Tighten lock nuts to speci®ed torque.
Lock nut tightening torque:
Refer to ST section (``POWER STEERING GEAR
AND LINKAGE'').
FRONT WHEEL TURNING ANGLE
Turning angle is set by stroke length of steering gear rack and
cannot be adjusted.
1. Set wheels in straight-ahead position. Then move vehicle for-
ward until front wheels rest on turning radius gauge properly.
2. Rotate steering wheel all the way right and left; measure turn-
ing angle.
Do not hold the steering wheel on full lock for more than 15
seconds.
Wheel turning angle (Full turn):
Refer to SDS (FA-27).
3. Adjust by stopper bolt if necessary.
:30-40Nzm (3.1 - 4.1 kg-m, 22 - 30 ft-lb)
SFA614B
SFA234AC
SFA857B
SFA439BA
SFA858B
ON-VEHICLE SERVICE
Front Wheel Alignment (Cont'd)
FA-9

Removal
1. Set knob of manual-lock free-running hub to the ``FREE'' posi-
tion.
2. Loosen bolts and remove free-running hub assembly.
3. Remove snap ring and take off drive clutch.
4. Take out bushing and spacer from wheel hub.
SFA427AA
SFA428A
SFA187
SFA188
SFA189
FRONT AXLE Ð Manual-lock Free-running Hub
FA-11

Installation
Install free-running hub in the reverse order of removal.
Apply multi-purpose grease to bushing and drive clutch
before installing on wheel hub and axle shaft, respectively.
+Install drive clutch.
+Place snap ring in drive shaft groove.
Axial end play:
0.4 mm (0.016 in) or less
Snap ring size:
Refer to SDS.
+When installing manual-lock free-running hub, make sure the
position ``FREE''.
Apply multi-purpose grease to drive shaft end.
+Check operation of manual-lock free-running hub after install-
ing it.
Inspection
+Check that hub moves smoothly and freely.
+Check that clutch moves smoothly in the body.
SFA860B
SFA200
SFA428A
FRONT AXLE Ð Manual-lock Free-running Hub
FA-12

Removal
1. Set the auto-lock free-running hub at the condition ``LOCK''.
2. Remove auto-lock free-running hub assembly.
3. Remove snap ring.
4. Remove spindle washer and thrust washer.
5. After installing auto-lock free-running hub, check operation of it.
When installing it, apply recommended grease to drive shaft
end.
Installation
1. When installing hub's mating parts (such as thrust washer and
spindle washer) on drive shaft, select suitable snap ring so that
end play between drive shaft and its mating parts is within
speci®cations.
Axial end play:
0.4 mm (0.016 in) or less
Snap ring size:
Refer to SDS.
2. Install auto-lock free-running hub assembly to wheel hub.
+When installing auto-lock free-running hub assembly, be sure
to align outer brake pawl with notch in spindle.
+After inserting auto-lock free-running hub assembly into bore in
wheel hub, make sure there is no clearance between hub
assembly and wheel hub. If clearance exists, the cause may be
one of the following:
(1) Hub assembly is set in ``LOCK'' position.
(2) Outer brake pawl is not aligned with notch in spindle.
SFA861B
SFA862B
SFA863B
SFA433AA
SFA864B
FRONT AXLE Ð Auto-lock Free-running Hub
FA-13

Removal and Installation
CAUTION:
Before removing the front axle assembly, disconnect the ABS
wheel sensor from the assembly. Then move it away from the
front axle assembly area. Failure to do so may result in dam-
age to the sensor wires and the sensor becoming inoperative.
1. Remove free-running hub assembly.
Refer to FRONT AXLE Ð Auto-lock or Manual-lock Free-run-
ning Hub.
2. Remove brake caliper assembly.
Brake hose need not be disconnected from brake caliper.
In this case, suspend caliper assembly with wire so as not to
stretch brake hose.
Be careful not to depress brake pedal, or piston will pop out.
Make sure brake hose is not twisted.
3. Remove ABS sensor.
4. Remove lock washer.
5. Remove wheel bearing lock nut with Tool.
6. Remove wheel hub and wheel bearing.
Be careful not to drop outer bearing.
7. After installing wheel hub and wheel bearing, adjust wheel
bearing preload.
Refer to ``Front Wheel Bearing'', ``ON-VEHICLE SERVICE'',
FA-5.
SFA865B
SFA470AA
SFA748BA
SFA866B
FRONT AXLE Ð Wheel Hub and Rotor Disc
FA-14

7. Install bearing cap with inner bearing and adjusting shim.
Before installing seal guard, scraper, grease seal and support-
ing ring (as a unit), apply approx. 50 g (1.76 oz) of wheel bear-
ing grease to perimeters shown in ®gure at left.
Slits located in scraper and supporting ring should point
straight downward when installed.
8. When installing grease seal guard, adjust so painted surface is
visible.
Install knuckle ¯ange stopper bolt and nut on stopper side of
axle case.
After installing tie rod, adjust it to speci®ed steering angle
using turning radius gauge, then tighten with lock nut.
Knuckle Flange Grease Seal
To replace only knuckle ¯ange grease seal, proceed as follows.
REMOVAL
1. Turn steering wheel to both the extreme right and left, and
remove grease seal guard and scraper from knuckle ¯ange.
2. Extract grease seal and remove it by cutting it from axle case.
SFA883B
SFA876B
SFA884B
SFA885B
FRONT AXLE Ð Knuckle Flange
Installation (Cont'd)
FA-21