NISSAN PICK-UP 1998 Repair Manual

6. Turn wheel bearing lock nut back 45 degrees.
7. Fit adjusting cap and new cotter pin. Align cotter pin slot by
loosening nut 15 degrees or less.
8. Measure wheel bearing preload and axial end play.
Axial end play: 0 mm (0 in)
Wheel bearing preload
(As measured at wheel hub bolt):
New grease seal
9.8 - 28.4 N (1.0 - 2.9 kg, 2.2 - 6.4 lb)
Used grease seal
9.8 - 23.5 N (1.0 - 2.4 kg, 2.2 - 5.3 lb)
Repeat above procedures until correct bearing preload is
obtained.
9. Spread cotter pin.
10. Install hub cap.
PRELOAD ADJUSTMENT (4WD)
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:
lThreaded portion of spindle
lContact surface between wheel bearing washer and outer
wheel bearing
lGrease seal lip
lWheel hub (as shown at left)
3. Tighten wheel bearing lock nut with Tool.
: 78 - 98 N´m (8 - 10 kg-m, 58 - 72 ft-lb)
4. Turn wheel hub several times in both directions.
5. Loosen wheel bearing lock nut so that torque becomes 0 N´m
(0 kg-m, 0 ft-lb).
6. Retighten wheel bearing lock nut with Tool.
: 0.5 - 1.5 N´m (0.05 - 0.15 kg-m, 4.3 - 13.0 in-lb)
SFA452B
SMA574A
SRA417
SFA891
SFA814B
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.
: 0.5 - 1.5 N´m (0.05 - 0.15 kg-m, 4.3 - 13.0 in-lb)
9. Measure wheel bearing axial end play.
Axial end play: 0 mm (0 in)
10. Measure starting force ``A'' at wheel hub bolt.
11. Install lock washer by tightening the lock nut within 15 to 30
degrees.
12. Turn wheel hub several times in both directions to seat wheel
bearing correctly.
13. Measure starting force ``B'' at wheel hub bolt. Refer to step
10.
14. Wheel bearing preload ``C'' can be calculated as shown
below.
C=BþA
Wheel bearing preload ``C'':
7.06 - 20.99 N (0.72 - 2.14 kg, 1.59 - 4.72 lb)
15. Repeat steps 3 through 14 until correct axial end play and
wheel bearing preload are obtained.
16. Install free-running hub.
Front Wheel Alignment
Before checking front wheel alignment, make a preliminary
inspection (Unladen*).
*: Fuel, radiator coolant and engine oil full. Spare tire, jack,
hand tools and mats in designated positions.
PRELIMINARY INSPECTION
1. Check tires for wear and proper inflation.
2. Check outside and inside wheel runout.
Wheel runout average
[(Outside runout value + Inside runout value) x 0.5]:
Refer to SDS, FA-35.
3. Check front wheel bearings for looseness.
4. Check front suspension for looseness.
5. Check steering linkage for looseness.
6. Check that front shock absorbers work properly by using the
standard bounce test.
SFA845B
SMA580A
SFA830
SFA356B
ON-VEHICLE SERVICE
Front Wheel Bearing (Cont'd)
FA-7

7. Measure vehicle height (Unladen):H=AþBmm(in)
Refer to SDS, FA-36.
a. Exercise the front suspension by bouncing the front of the
vehicle 4 or 5 times to ensure that the vehicle is in a neutral
height attitude.
b. Measure wheel alignment.
Refer to SDS, FA-36.
c. If wheel alignment is not as specified, adjust vehicle posture.
Refer to SDS, FA-36.
d. Adjust wheel alignment.
Refer to SDS, FA-36.
CAMBER, CASTER AND KINGPIN INCLINATION
Before checking camber, caster or kingpin inclination, move
vehicle up and down on turning radius gauge to minimize
friction. Ensure that the vehicle is in correct posture.
lMeasure camber, caster and kingpin inclination of both right
and left wheels with a suitable alignment gauge and adjust
in accordance with the following procedures.
Camber, Caster and Kingpin inclination:
Refer to SDS, FA-36.
lIn the following two cases, temporarily tighten the adjusting
bolts while aligning the matching marks with the slits as
shown in the figure at the left and measure the camber,
caster and kingpin inclination:
(1) When replacing the upper link or other suspension parts
with new ones
(2) When matching marks were not painted on adjusting
bolts before suspension disassembly procedures
lIf matching marks were already painted during suspension
disassembly, align the matching marks with the slits, then
temporarily tighten the adjusting bolts. Measure the camber,
caster and kingpin inclination.
SFA815B
SFA816B
SFA894
SFA817B
ON-VEHICLE SERVICE
Front Wheel Alignment (Cont'd)
FA-8

ADJUSTMENT
1.Both camber and caster angles are adjusted by adjusting bolts.
lIf the kingpin inclination is outside specifications, check the
front suspension parts for wear or damage. Replace faulty
parts with new ones.
2. From the measured value, read the coordinate (or: gradua-
tion) at the intersecting point in the graph.
a. If the coordinate (or: graduation) at the intersecting point is
positive, move the pin outward by turning the corresponding
adjusting bolt by the indicated graduation.
b. If the coordinate (or: graduation) at the intersecting point is
negative, move the pin inward by turning the corresponding
adjusting bolt by the indicated graduation.
After properly moving the pin(s), tighten the front and rear
adjusting bolts to specifications.
3. Re-measure to ensure that the camber and caster are within
specified tolerances.
[Example]
a. Measured values corresponding with the two values indi-
cated below: (See chart for 4WD model.)
Camber angle: þ0É06¢(þ0.10É)
Caster angle: 2É10¢(2.17É)
b.
Apply the above two values to the graph and determine point ``A''.
c.The coordinate (or: graduation) indicates that both the front and
rear adjusting bolts must be turned outward by 3 graduations.
Turn the adjusting bolts by the amount corresponding with the 3
graduations.
SFA817B
SFA910B
ON-VEHICLE SERVICE
Front Wheel Alignment (Cont'd)
FA-9

TOE-IN
Measure toe-in using the following procedure.
WARNING:
lAlways perform the following procedure on a flat sur-
face.
lMake sure that no one 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).
lIf 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-36.
7. Adjust toe-in by varying the length of both steering tie-rods.
a. Loosen clamp bolts or lock nuts.
b. Adjust toe-in by turning both the left and right tie-rod tubes
equal amounts.
Make sure that the tie-rod bars are screwed into the tie-rod
tube more than 35 mm (1.38 in).
Make sure that the tie-rods are the same length.
Standard length (A = B):
2WD
343.9 mm (13.54 in)
4WD
297.6 mm (11.72 in)
c. Tighten clamp bolts or lock nuts, then torque them.
SFA614B
SFA234AC
SFA819B
SFA897
ON-VEHICLE SERVICE
Front Wheel Alignment (Cont'd)
FA-10

FRONT WHEEL TURNING ANGLE
1. Set wheels in straight-ahead position. Then move vehicle
forward until front wheels rest properly on turning radius
gauge.
2. Rotate steering wheel all the way right and left; measure
turning angle.
lOn power steering models, turn steering wheel to full lock
and apply force (at circumference of steering wheel) of 98 to
147 N (10 to 15 kg, 22 to 33 lb) with engine at idle.
lDo not hold the steering wheel at full lock for more than
15 seconds.
Wheel turning angle (Full turn):
Refer to SDS, FA-36.
3. Adjust stopper bolt if necessary.
Standard length ``L
1'' (2WD):
20 mm (0.79 in)
Stopper bolt lock nut:
: 39 - 49 N´m (4.0 - 5.0 kg-m, 29 - 36 ft-lb)
Standard length ``L
2'' (4WD):
26.5 mm (1.043 in)
Stopper bolt lock nut:
: 76 - 98 N´m (7.8 - 10.0 kg-m, 56 - 72 ft-lb)
Drive Shaft
lCheck for grease leakage and damage.
SFA439BA
SFA915B
SFA916B
SFA901
ON-VEHICLE SERVICE
Front Wheel Alignment (Cont'd)
FA-11

2WD
SFA822B
FRONT AXLE
FA-12

4WD
SFA919B
FRONT AXLE
FA-13

Manual-lock Free-running Hub Ð 4WD Ð
REMOVAL AND INSTALLATION
1. Set knob of manual-lock free-running hub in the FREE posi-
tion.
2. Remove manual-lock free-running hub.
3. Remove snap ring and then draw out drive clutch.
4. When installing manual-lock free-running hub, make sure the
hub is in the FREE position.
Apply multi-purpose grease to the parts shown in the above
illustration.
5. Check operation of manual-lock free-running hub after instal-
lation.
INSPECTION
lCheck that the knob moves smoothly and freely.
lCheck that the clutch moves smoothly in the body.
AFA105
SFA936
SFA937
FRONT AXLE
FA-14

Auto-lock Free-running Hub Ð 4WD Ð
Removal
1. Set the auto-lock free-running hub in the FREE condition.
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 specifications.
Axial end play:
0.45 mm (0.0177 in) or less
Snap ring size:
Refer to SDS.
SFA909B
SFA828B
SFA863B
SFA847
FRONT AXLE
FA-15