Defender 90 NAS. Manual — part 64
FRONT SUSPENSION
1
SPECIFICATIONS, TORQUE
TORQUE VALUES
Nm
lbf ft
Anti-roll bar front:
- Mounting brackets
30
. . . . . . . . . . . . . ..
22
- Ball link self lock nut
70
. . . . . . . . . . . . ...
50
- Castellated nut
40
. . . . . . . . . . . . . . ...
30
Drag link to axle
40
. . . . . . . . . . . . . . . ...
30
Securing ring for mounting turret
14
. . . . . . . . . ..
10
Radius arm to chassis
175
. . . . . . . . . . . . . ..
130
Panhard rod mounting arm to chassis
90
. . . . . . . .
65
Panhard rod to axle
90
. . . . . . . . . . . . . . ..
65
Panhard rod to mounting arm
90
. . . . . . . . . . ..
65
Tie bar to Panhard rod
110
. . . . . . . . . . . . . .
80
Radius arm to axle
200
. . . . . . . . . . . . . . ...
150
Road wheel nuts
130
. . . . . . . . . . . . . . . ..
95
REAR SUSPENSION
1
DESCRIPTION AND OPERATION
DESCRIPTION
The rear suspension locates the rear axle with two
round section steel lower link arms and a forged ’A’
frame upper link assembly. This system allows
maximum axle articulation and wheel travel while
maintaining roll stiffness and directional stability.
The link arm is secured by a single retaining nut to the
chassis mounting, comprising a rubber bushed
bracket, which is retained by three fixings. A ferrule
rubber bush with a single retaining bolt is used to
secure the link arm to its axle mounting.
The upper link assembly is located on the rear
differential housing by a pivot ball-pin assembly. Two
brackets, bolted to the chassis crossmember,
support both sides of the ’A’ frame of the link
assembly, secured by single retaining bolts.
Two rubber bearing bushes with retaining straps,
secure the rear of the anti-roll bar, if fitted, to the
chassis mountings, while bushed links support the
front of the anti-roll [sway] bar to the axle.
Conventional long travel coil springs and hydraulic
shock absorbers are used to control body movement.
The shock absorbers are secured to chassis mounting
brackets and fabricated lower mountings welded to to
the rear axle. Retaining plates are used to secure the
coil springs to the axle mounting while fabricated
brackets, welded to to the chassis, are used for the
upper spring location.
Rear axle suspension
1. ’A’ frame, upper link assembly
2. Lower link
3. Coil springs
4. Shock absorber
REAR SUSPENSION
1
REPAIR
REAR ROAD SPRING
Service repair no - 64.20.01.
Remove
1. Loosen rear road wheel retaining nuts.
2. Support chassis on stands and remove wheels.
3. Support rear axle weight with jack.
4. Disconnect shock absorbers at one end.
5. Position coil spring compressor correctly on road
spring.
6. Compress spring evenly to facilitate removal.
7. Lower axle to free road spring from upper seat.
CAUTION: Avoid lowering axle further than
rear brake flexible hose and road speed
sensor leads will allow.
8. Remove spring retainer plate.
9. Withdraw road spring.
10. Collect off spring seat.
Refit
11. Position spring seat on axle location.
12. Fit road spring into chassis location and using a
turning motion, fit to spring seat.
13. Fit spring retainer plate.
14. Secure shock absorber. Tighten to
37 Nm, 27
lbf ft
15. Fit road wheels. Tighten to
130 Nm, 95 lbf ft.
16. Remove chassis stands and jack.
REAR SHOCK ABSORBER
Service repair no - 64.30.02.
Remove
1. Loosen road wheel retaining nuts.
2. Support chassis on stands. Remove road wheel
and support rear axle weight with jack.
3. Remove fixings and withdraw shock absorber
from axle bracket.
4. Remove upper fixings.
5. Withdraw shock absorber.
6. If required remove mounting bracket
7. If required remove mounting rubbers.
Refit
8. Position shock absorber and fit upper fixings.
9. Secure shock absorber with lower fixings to axle
bracket. Tighten to
37 Nm, 27 lbf ft.
10. Fit road wheels. Tighten to
130 Nm, 95 lbf ft.
11. Remove chassis stands and jack.
64
REAR SUSPENSION
2
REPAIR
SUSPENSION LINK - UPPER
Service repair no - 64.35.44.
Remove
1. Support rear of chassis on stands, allow axle to
hang freely.
2. Remove fixings, upper link bracket to frame.
3. Remove fixings, upper links to pivot bracket.
4. Remove upper link complete with frame bracket.
5. Remove bolt.
6. Separate link from bracket.
Renew bush
7. Press out rubber bushes.
8. Fit bush centrally in housing.
CAUTION: Apply pressure to outer edge of
bush, and not rubber inner.
Refit
NOTE: Do no fully tighten fixings until all
components are in position.
9. Secure link to frame bracket.
10. Fit upper link to pivot bracket.
11. Fit frame bracket to chassis mounting.
12. Fully tighten fixings to correct torque.
See
Specifications, torque, Torque values.
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