1999 LAND ROVER DEFENDER wheel

70 - BRAKES
CONTENTS
Page
DESCRIPTION AND OPERATION
REAR BRAKE CALIPERS - FROM 02MY 2...........................................................
ADJUSTMENT
BRAKE SYSTEM BLEED 1.....................................................................................
PARK BRAKE - ADJUST 2.....................................................................................
REPAIR
ECU - ABS 1...........................................................................................................
SENSOR - ABS - FRONT WHEEL 2......................................................................
SENSORS - ABS - REAR WHEELS 3....................................................................
MASTER CYLINDER 4...........................................................................................
SERVO ASSEMBLY 5............................................................................................
MODULATOR UNIT - ABS 6...................................................................................
BRAKE CALIPER - FRONT 7.................................................................................
BRAKE CALIPER - REAR 8....................................................................................
SWITCH - STOP LIGHT 9.......................................................................................
FRONT BRAKE PADS - FROM 02MY 10...............................................................
REAR BRAKE PADS - FROM 02MY 11.................................................................
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BRAKES
3
DESCRIPTION AND OPERATION Modifications to the rear brakes have been introduced on 110 and 130 models. This is to increase the service life
of the rear brake pads in harsh environments.
New rear brake calipers are introduced which allow the fitment of brake pads with a thicker friction material. The
brake pads have increased leading and trailing edge chamfers which improve efficiency.
Aerodynamic deflectors are located forward of the rear wheels to protect the rear calipers from the ingress of dirt,
which can cause excessive pad wear. The deflectors are manufactured from moulded rubber and are flexible to
prevent damage from impact. These deflectors are fitted to 90, 110 and 130 models in markets where
environmental conditions cause excessive brake pad wear.
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70BRAKES
2
ADJUSTMENT PARK BRAKE - ADJUST
Service repair no - 70.45.09
Check
NOTE: The park brake should be fully
operational on third notch of ratchet.
1.Raise one rear wheel clear of ground and
support on axle stand.
2.Release park brake lever.
3.Tighten brake adjuster to25 Nm (18 lbf.ft)to
fully expand shoes to drum.
4.Back off adjuster 1
1/2turns, check that drum is
free to rotate.
5.Check operation of park brake lever to give pawl
2 notches free movement on ratchet before
being fully operational on third notch of ratchet.
Adjust park brake accordingly if lever travel
exceeds the above tolerance.
CAUTION: Cable adjustment must ONLY
be used for initial setting and to
compensate for cable stretch. It MUST
NOT be used to take up brake shoe wear, which
MUST be adjusted at brake drum.
6.Remove axle stand and wheel chock.
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70BRAKES
2
REPAIR SENSOR - ABS - FRONT WHEEL
Service repair no - 70.65.30
Remove
1.Raise vehicle on a 2 post ramp.
2.Carefully prize ABS sensor from front hub.
3.Release clip securing ABS sensor harness to
brake pipe.
4.Release clip securing ABS sensor harness to
inner wing.
5.Lower vehicle.
6.Release second clip securing ABS harness to
inner wing.
7.Disconnect sensor harness multiplug.
8.Remove sensor and harness.
Refit
9.Connect sensor harness multiplug.
10.Position sensor harness and secure to inner
wing with clip.
11.Raise vehicle.
12.Secure harness to inner wing and brake pipe
with clips.
13.Apply grease to sensor.
14.Carefully fit sensor to hub assembly.
15.Lower vehicle.
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BRAKES
3
REPAIR SENSORS - ABS - REAR WHEELS
Service repair no - 70.65.31
Remove
1.Raise vehicle on a 2 post ramp.
2.Remove both rear wheels.
3.Remove 3 bolts securing each brake disc
backplate to hub assemblies.
4.Remove both back plates.
5.Remove 2 cable ties securing sensor harness to
outer ends of axle.
6.Carefully prise both sensors from hub
assemblies.
7.Release 4 clips securing sensor harness to axle.
8.Release cable tie securing harness to
differential.
9.Release 3 cable ties securing harness to chassis
longitudinal.
10.Disconnect sensor multiplug.
11.Remove harness and sensor assembly.
Refit
12.Position harness and sensor assembly to vehicle
and connect multiplug.
13.Apply grease to both sensors.
14.Carefully fit both sensors to hub assemblies.
15.Secure harness to axle and differential with
cable ties.
16.Secure harness to axle with clips.
17.Secure harness to chassis with cable ties.
18.Fit both back plates to hub assemblies and
secure with bolts.
19.Fit rear wheels and tighten to130 Nm (95 lbf.ft)
.
20.Lower vehicle.
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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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