Defender 90 NAS. Instruction - page 74

WHEELS AND TYRES

5

REPAIR

Off vehicle balancing

Balance wheel assembly referring to equipment
manufacturer’s instructions.

It is essential that the wheel is located by the centre
hole NOT the stud holes. To ensure positive wheel
location the diameter of the locating collar on the
machine shaft must be 112.80 to 112.85 mm, 4.441 to
4.443 in. This diameter will ensure that the collar fits
correctly within the centre hole of the wheel.

Where possible always use the vehicle wheel
retaining nuts to locate the wheel on the balancer, to
avoid damaging the wheel. If this is not possible, the
locating nuts must be of a similar pattern to the
original wheel nuts. The use of conical type wheel
nuts for this purpose may damage the surface on alloy
wheels.

Cleaning

Wash the aluminium wheels using a suitable wash
and wax concentrate correctly diluted and rinse with
cold clear water. DO NOT use abrasives or aluminium
wheel cleaners containing acid, as they will destroy
the lacquer finish.

Tyre changing

Use only tyre changing equipment to mount or
demount tyres, following the equipment
manufacturer’s instructions. DO NOT use hand tools
or tyre levers, as they may damage tyre beads or the
wheel rim.

Puncture repair

Remove punctured tyre from wheel and repair using a
combination service plug and vulcanising patch.
Always follow manufacturer’s instructions when using
a puncture repair kit.

Only punctures in tread area are repairable, DO NOT
attempt to repair punctures in tyre shoulders or
sidewalls.

Do not attempt to repair a tyre that has sustained the
following: bulges or blisters, ply separation, broken or
cracked beads, wear indicators visible and punctures
larger than 6 mm diameter.

CAUTION: Do not use tyre sealants that
are injected through valve stem to repair
punctured tyres, they may produce wheel

corrosion and tyre imbalance.

Aluminium wheel rim bead seats should be cleaned
using a non-abrasive cleaner to remove the mounting
lubricants and old rubber. Before mounting or
demounting a tyre, bead area should be well
lubricated with a suitable tyre lubricant.

TYRE FITTING

Alloy wheels

1. Install a new valve assembly.
2. Ensure wheel and tyre is adequately lubricated.
3. Mount tyre in normal manner. Inflate tyre and at

same time apply hand pressure to area around
valve to aid seating over valve first.

NOTE: Stop inflation immediately if tyre
seats opposite valve, as this will result in
valve being blocked by tyre beading,

making further inflation impossible, and carry out
following procedure.

4. Deflate tyre, unseat and rotate it around the rim

until valve is in line with that part of tyre which
seated initially. This part of beading having
seated over hump previously will automatically
seat first when tyre is re-inflated.

5. Inflate tyre to seat beads correctly, finally inflate

to correct pressure.

74

WHEELS AND TYRES

6

REPAIR

WHEELS

Remove

WARNING: The parking brake acts on the
transmission, not rear wheels, and may
not hold vehicle when jacking unless the

following procedure is used. If one front wheel
and one rear wheel is raised, no vehicle holding or
braking effect is possible. Wheels MUST be
chocked in all circumstances.
Apply parking brake, select ’P’ in main gearbox
and engage low gear in transfer box.

1. Loosen 5 wheel nuts.
2. Using a suitable trolley jack, raise vehicle and

place on axle stands.

See INTRODUCTION,

Information, Jacking

3. Remove wheel nuts and carefully withdraw

wheel over studs.

Refit

4. Ensure that retaining studs and nuts are clean.
5. Alloy wheels: Lightly coat wheel mounting spigot

face with a suitable anti-seize compound to
minimise possibility of adhesion between wheel
and spigot face.

6. Refit wheel taking care not to damage stud

threads. (Do not apply oil).

7. Fit wheel nuts and turn by hand for at least 3 full

threads before using any form of wheel wrench.

8. Tighten nuts as much as possible using a

suitable wrench.

9. Lower vehicle and finally tighten nuts to correct

torque in sequence shown.

130 Nm, 95 lbf ft .

WHEEL STUD

Remove

1. Remove wheel.

See Wheels

2. Drive stud out of driveshaft flange.

Refit

3. Position stud in flange.
4. Install a suitable spacer over stud.
5. Using a M16 x 1.5 nut, a slave wheel nut is

suitable, pull stud into flange until shoulder of
stud abuts flange.

6. Refit wheel.

See Wheels

CHASSIS AND BODY

1

DESCRIPTION AND OPERATION

CHASSIS AND BODY

Chassis

The chassis on all Defender variants are of the box
section, ladder type construction, manufactured from
2 mm (14swg) steel and treated with zinc phosphate,
cathodic electro coated, followed by waxing in the rear
crossmember.

Outriggers and angled brackets welded to the chassis
support suspension and axle components and are
also used as body mounting points. A detachable box
section crossmember, located between the two
chassis longitudinals, is fitted to facilitate main
gearbox and tranfer box assembly removal.

Should chassis damage occur a comprehensive range
of components are available, including body support
outriggers, cross members and radius arm mounting
brackets. ALWAYS fit genuine parts that are fully
guaranteed and to original equipment specification,
fitted with Land Rover’s BS 5135 welding standard.

Body

All body panels, with the exception of the fascia
bulkhead, are manufactured from aluminium alloy.
Galvanized steel is used for the front wheel arches to
give optimum protection. Most panels are also treated
with zinc phosphate and cathodic electrocoated with
polyester surfacer, and are bolted to the welded
chassis.

76

CHASSIS AND BODY

2

DESCRIPTION AND OPERATION

Рассказать друзьям