Defender 90 NAS. Manual — part 72
BRAKES
1
SPECIFICATIONS, TORQUE
TORQUE VALUES
Brakes
Nm
lbf ft
Brake pipe connections to:
- Pressure reducing valve
15
. . . . . . . . . ...
11
- Brake calipers
15
. . . . . . . . . . . . . ...
11
- Master cylinder
15
. . . . . . . . . . . . . ..
11
Flexible hoses to calipers
15
. . . . . . . . . . . . .
11
Bleed screws
15
. . . . . . . . . . . . . . . . .
11
Brake caliper to swivel pin housing
82
. . . . . . . . ..
60
Brake disc bolts*
73
. . . . . . . . . . . . . . . ..
54
Brake drum screw
25
. . . . . . . . . . . . . . .
18
Rear propeller shaft flange
46
. . . . . . . . . . . ...
34
Brake drum adjuster bolt
25
. . . . . . . . . . . . ..
18
Servo assembly to pedal box
26
. . . . . . . . . . ...
19
Pedal box to engine bulkhead
25
. . . . . . . . . . ..
18
Master cylinder to servo
26
. . . . . . . . . . . . ...
19
Road wheels
130
. . . . . . . . . . . . . . . . .
95
* Apply Loctite 270 before assembly
WHEELS AND TYRES
1
DESCRIPTION AND OPERATION
TYPES OF WHEEL RIMS AND TYRES
Description
The vehicle is equipped with alloy wheels and
tubeless radial ply tyres.
Tyre codes
The writing, codes and numbers moulded into the tyre
wall vary between tyre manufacturers, however most
tyres are marked with the information shown in the
illustrated example.
NOTE: The illustration is an example of the
type of markings moulded into tyres and is
for guidance only. For specific tyre
specifications
See GENERAL SPECIFICATION
DATA, Information, Tyre size and pressures .
1. Type of tyre construction - Radial Ply
2. Load index - 104
3. Speed symbol - S or T
4. USA Tyre quality grading - Tread wear 160
Traction A temperature B
5. Tread wear indicators moulded into tread pattern
are located at intervals around the tyre and
marked by a code - E66 103S6
6. Tyres with ’Mud Snow’ type tread pattern are
marked - M&S
7. Tyre reinforcing mark - Reinforced
8. USA Load and pressure secification -
1260Kg(2778LBS) at 450kPa (65psi)
9. Tyre size - 265/75 R16 All Terrain
10. Type of tyre - TUBELESS
11. Country of manufacture - MADE IN GREAT
BRITAIN
12. USA Compliance symbol and identification -
DOT AB7C DOFF 267
13. European type approval identification - E11
01234
14. Tyre construction - SIDE WALL 2 PLIES
RAYON. TREAD 2 RAYON 2 STEEL
15. Manufacturers brand name/type - TRACTION
PLUS mzx M
WHEELS AND TYRES
1
FAULT DIAGNOSIS
TYRE WEAR CHART
FAULT
CAUSE
REMEDY
Rapid wear at
Tyres under-inflated
Inflate to correct pressure
shoulders
Worn suspension components
Replace worn components
i.e. ball joints, panhard
rod bushes,steering damper
Excessive cornering speeds
Rapid wear at
centre
Tyres over-inflated
Inflate to correct pressure
of tread
Wear at one
shoulder
Track out of adjustment
Adjust track to correct figure
Bent panhard rod
Check and replace worn or damaged
components
Bald spots or tyre
Wheel out of balance
Balance wheel and tyre
cupping
assembly
Excessive radial runout
Check runout and replace tyre
if necessary
Shock absorber worn
Replace shock absorber
Excessive braking
Tyre scalloped
Track out of adjustment
Adjust toe to correct figure
Worn suspension components
Replace as necessary
Excessive cornering speeds
CAUTION: This diagnosis chart is for general guidance only and does not necessarily include
every cause of abnormal tyre wear.
74
WHEELS AND TYRES
2
FAULT DIAGNOSIS
FAULT - SYMPTOMS
Vibration through steering wheel
1. Check tyre pressures.
See Repair, Tyre
Pressures
2. Check condition of tyres.
See Tyre Wear Chart
3. Check front wheel alignment
See STEERING,
Adjustment, Front Wheel Alignment
4. Check wheel balance.
See Repair, Wheel
Balancing
NOTE: In the event that any apparent
vibration is not eliminated at this stage.
See PROPELLER SHAFTS, Fault
diagnosis, Vibration Harshness
NOTE: Radial ply tyres have a flexible
sidewall, which produces a sidewall bulge
making the tyre appear under-inflated.
This is a normal condition for radial ply tyres. Do
not attempt to reduce this bulge by over-inflating
the tyre.
1. Correct inflation.
2. Under-inflation.
3. Over-inflation.
4. Tread contact with road.
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