1999 LAND ROVER DEFENDER brake

BRAKES
7
REPAIR Refit
11.Position modulator to mounting bracket and
connect multiplug.
12.Fit modulator to mounting bracket and tighten
nuts to9 Nm (7 lbf.ft).
13.Connect 2 multiplugs to rear of modulator.
14.Remove plugs from brake pipes and modulator.
15.Clean brake pipe unions.
16.Connect brake pipe unions to modulator
ensuring pipes are connected to their correct
ports.
17.Tighten all unions to14 Nm (10 lbf.ft).
18.Bleed brake system.See Adjustment.
NOTE: To ensure correct operation, the
ABS system MUST be tested using
TestBook.BRAKE CALIPER - FRONT
Service repair no - 70.55.02
Remove
1.Loosen front road wheel nuts.
2.Raise front of vehicle.
WARNING: Support on safety stands.
3.Remove road wheel.
4.Remove split pins from pad retaining pins.
5.Remove brake pad retainers and springs.
6.Remove brake pads and shim if fitted.
7.Pull back brake hose shield.
8.Clamp brake hose using a suitable clamp.
9.Position container beneath brake caliper to
collect spillage.
10.Loosen brake pipe union and disconnect from
caliper.
11.Plug brake pipe and caliper connections.
12.Remove 2 bolts securing caliper.
13.Remove brake caliper.
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70BRAKES
8
REPAIR Refit
14.Clean caliper to hub mating faces.
15.Position caliper to hub, fit bolts and tighten to82
Nm (60 lbf.ft).
16.Remove plugs from pipe to caliper connections
and wipe.
17.Connect pipe to caliper, tighten union to15 Nm
(11 lbf.ft).
18.Apply a light film of grease to rear of brake pads.
19.Fit pads to calipers.
From 02MY, ensure pads are correctly fitted,
with leading edge chamfer fitted as shown.
20.Fit pad retainers and springs.
21.Fit split pins to retainers.
22.Remove brake hose clamp.
23.Bleed brakes.See Adjustment.
24.Depress brake pedal to seat pads onto discs.
25.Fit road wheels, remove axle stands and tighten
nuts to130 Nm (96 lbf.ft).BRAKE CALIPER - REAR
Service repair no - 70.55.03
Remove
1.Loosen rear road wheel nuts.
2.Raise rear of vehicle.
WARNING: Support on safety stands.
3.Remove road wheel.
4.Remove split pins from brake pad retaining pins.
5.Remove brake pad retaining pins.
6.Remove brake pad retainer springs.
7.Remove brake pads and shim if fitted.
8.Position container beneath brake caliper to
collect spillage.
9.Loosen brake pipe union and disconnect from
caliper.
CAUTION: Plug the connections.
10.Remove 2 bolts securing caliper.
11.Remove brake caliper.
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BRAKES
9
REPAIR Refit
12.Clean caliper to axle bracket mating faces.
13.Position caliper to axle bracket, fit bolts and
tighten to82 Nm (60 lbf.ft).
14.Remove plugs from pipe and caliper.
15.Clean brake pipe union and caliper.
16.Connect pipe to caliper, tighten union to15 Nm
(11 lbf.ft).
17.Apply a light film of grease to rear of brake pads.
18.Fit brake pads.
From 02MY, ensure shims are correctly fitted,
see illustration.
NOTE: Vehicles from 02MY have leading
and trailing edge chamfers on rear pads.
19.Fit pad retainer springs.
20.Fit brake pad retaining pins and secure with new
split pins.
21.Bleed brakes.See Adjustment.
22.Depress brake pedal to seat pads onto discs.
23.Fit road wheels, remove axle stands and tighten
nuts to130 Nm (96 lbf.ft).SWITCH - STOP LIGHT
Service repair no - 70.35.42
Remove
1.Disconnect 2 Lucars from stop light switch.
2.Remove mastic from around switch.
3.Remove switch from pedal box.
Refit
4.Fit and tighten switch to pedal box.
5.Apply mastic to switch.
6.Connect 2 Lucars to switch.
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70BRAKES
10
REPAIR FRONT BRAKE PADS - FROM 02MY
Service repair no - 70.40.02
Remove
1.Remove front road wheels.
2.Clean exterior of calipers.
3.Remove split pin from retaining pins.
4.Remove pad retaining pins and anti-rattle
springs.
5.Remove brake pads.
6.Clean exposed parts of pistons, using new brake
fluid. Wipe away excess with a lint free cloth.
7.Using piston clampLRT-70-500press each
piston back into its bore. Ensure that displaced
brake fluid does not overflow from reservoir.
Refit
8.Fit brake pads.
NOTE: Ensure pads are correctly fitted,
with leading edge chamfer fitted as shown.
9.Fit pad retaining pins and anti-rattle springs.
Secure with new split pins.
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BRAKES
11
REPAIR 10.Apply service brake pedal several times to locate
pads.
11.Fit road wheels, remove chassis stands and
jack. Tighten wheel nuts to130 Nm (96 lbf/ft).
12.Check fluid reservoir. Top up if necessary, using
correct grade of fluid.See LUBRICANTS,
FLUIDS AND CAPACITIES, Information.REAR BRAKE PADS - FROM 02MY
Service repair no - 70.40.03
Remove
1.Remove rear road wheels.
2.Clean exterior of calipers.
90 Models
110/130 Models
3.Remove pad retaining pins and anti-rattle
springs. Note differences between 90 and
110/130 models.
4.Remove brake pads and shims.
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70BRAKES
12
REPAIR 5.Clean exposed parts of pistons, using new brake
fluid.
6.Wipe away excess fluid with lint free cloth.
7.Using piston clampLRT-70-500press each
piston back into its bore. Ensure that displaced
brake fluid does not overflow from reservoir.
Refit
8.Fit brake pads and shims.
Ensure shims are correctly fitted, see illustration.
NOTE: Vehicles from 02MY have leading
and trailing edge chamfers on rear pads.
Shims are also fitted.
9.Fit anti-rattle springs and secure with retaining
pins.10.Apply service brake pedal several times to locate
pads.
11.Fit road wheels, remove chassis stands and
jack. Tighten wheel nuts to130 Nm (96 lbf/ft).
12.Check fluid reservoir, top up if necessary, using
correct grade of fluid.See LUBRICANTS,
FLUIDS AND CAPACITIES, Information.
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77PANEL REPAIRS
8
SEALING AND CORROSION PROTECTION CORROSION PROTECTION
The following information details the materials that are
applied during manufacture for corrosion protection.
Factory Treatments
The Defender is treated with the following
anti-corrosion materials in production:
A PVC-based underbody sealer material
which is sprayed onto the underfloor, wheel
arches and undersill areas.
An application of cavity wax which is
sprayed into enclosed cavities and box
sections.
A final coating of underbody wax to cover
the complete underfloor including
components but excluding brake discs,
exhaust system and propeller shafts.
A coat of protective lacquer applied to the
whole body.
A coat of protective wax applied to the
engine bay and wheel arch areas.
NOTE: Do not apply wax to engine bay of
Td5 models.
In addition to the above measures, all steel parts are
zinc-coated both sides.
Underbody Sealer
Underfloor areas and outer sill panels are treated with
a Plastisol PVC underbody sealer. This material is not
suitable for re-treatment.
When repairing areas of underbody sealer, strip the
factory-applied material back to a suitable break point,
ensuring that a clean metal surface is exposed and
that the edge of the existing material adheres soundly
to the panel.
Blanking plugs and grommets in the floor pan (except
those used for wax injection) MUST be fitted before
underbody sealer application. Heat-fusible plugs
which have been disturbed should either be refitted
with the aid of a hot air blower or replaced with rubber
grommets.
NOTE: Application of new underbody
sealer must be carried out between primer
and surfacer paint operations. Areas
where seam sealer is used should be re-treated as
necessary before application of underbody sealer.
CAUTION: Ensure that suspension units,
wheels, tyres, power unit, driveshafts,
exhaust and brakes (including all
mounting points) are shielded prior to application
of fresh underbody sealer.
Cavity Wax
Cavity wax is applied to certain box sctions The
information given on the following pages is intended
as a guide and shows the areas to be treated with
cavity wax, as well as the access holes used during
manufacture.See GENERAL INFORMATION DATA,
Sealing and corrosion protection section.
Underbody Wax
A coat of underbody wax is applied to the entire
underbody inboard of the sill vertical flanges, and
covers all moving and flexible components EXCEPT
for wheels and tyres, brakes and exhaust. The wax is
applied over paints and underbody sealers.
The underbody wax must be reinstated following all
repairs affecting floor panels.
CAUTION: Old underbody wax must be
completely removed from a zone
extending at least 200 mm (7.9 in) beyond
the area where new underbody sealer is to be
applied.
Engine Bay Wax
Reinstate protective engine bay wax disturbed during
repairs using the approved material.
Wheel Arch Wax
Reinstate protective wheel arch wax disturbed during
repairs using the approved material.
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77PANEL REPAIRS
10
SEALING AND CORROSION PROTECTION Underbody Protection Repairs
When body repairs are carried out, always ensure that
full sealing and corrosion protection treatments are
restored. This applies both to the damaged area, and
also to areas where protection has been indirectly
impaired as a result of accident damage or repair
operations.
Prior to straightening out or panel beating, remove all
corrosion protection material in the damaged area.
This applies in particular to panels coated with wax,
PVC underbody sealer, sound deadening pads etc.
WARNING: DO NOT use oxy-acetylene gas
equipment to remove corrosion prevention
materials. Large amounts of fumes and
gases are liberated by these materials when they
burn.
Equipment for the removal of tough anti-corrosion
sealers offers varying degrees of speed and
effectiveness. The compressed air-operated scraper
(NOT an air chisel) offers a relatively quiet mechanical
method of removal using an extremely rapid
reciprocating action. During use, direct the operating
end of the tool along the work surface.
The most common method is by the use of a hot air
blower with integral scraper.
CAUTION: High temperatures can be
generated with this equipment which may
cause fumes. Always exercise care in its
use.
Another tool, and one of the most efficient methods, is
the rapid-cutting’hot knife’. This tool uses a wide
blade and is quick and versatile, able to be used
easily in profiled sections where access is otherwise
awkward.
Use the following procedure when repairing
underbody coatings:
1.Remove existing underbody coatings.2.After panel repair, clean the affected area with a
solvent wipe, and treat bare metal with an etch
phosphate material.
3.Re-prime the affected area.DO NOT under any
circumstances apply underbody sealer
directly to bare metal surfaces.
4.Replace all heat-fusible plugs which have been
disturbed. Use rubber grommets of equivalent
size if plugs are not available, but ensure that
they are embedded in sealer.
5.Mask off all mounting faces from which
mechanical components, hoses and pipe clips,
have been removed. Underbody sealer must be
appliedbeforesuch components are refitted.
6.Brush sealer into all exposed seams.
7.Spray the affected area with an approved
service underbody sealer.
8.Remove masking from component mating faces,
and touch-in where necessary. Allow adequate
drying time before applying underbody wax.
Underbody Wax
After refitting mechanical components, including
hoses, pipes and small fixtures, mask off the brake
discs and apply a coat of approved underbody wax.
NOTE: Where repairs include the
application of finish paint coats in the
areas requiring underbody wax, paint
operations must be carried out BEFORE wax
application.
Underbonnet Wax
Where repairs have involved replacement of engine
bay panels, treat the entire engine compartment
including all components, clips and small fixtures with
an approved underbonnet lacquer or wax.
Proprietary Anti-Corrosion Treatments
The application of proprietary anti-corrosion
treatments in addition to the factory-applied treatment
could invalidate the Corrosion Warranty and should be
discouraged. This does not apply to approved,
compatible, preservative waxes which may be applied
on top of existing coatings.
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