Range Rover Classic. Manual — part 132
ABS
3
REPAIR
7. Bleed accumulator - open bleed screw. If vehicle
has ETC, accumulator bleed screw is on top of
ETC valve block. Switch on ignition, run pump
for 3-4 secs, switch off and repeat procedure
until fluid is clear of air bubbles. Switch off
ignition. Close bleed screw.
8. Bleed two hydraulic booster bleed screws. Open
one bleed screw, depress brake pedal, switch on
ignition, run pump until fluid is clear of air
bubbles. Close booster bleed screw, switch off
ignition, release pedal. Repeat for other bleed
screw.
9. Bleed power circuit at four calipers in turn.
Depress pedal, open bleed screw, (upper bleed
screw on front calipers). Switch on ignition, run
pump for 3-4 secs, switch off and repeat
procedure until fluid is clear of air bubbles.
Switch off ignition, close caliper bleed screw,
release pedal.
10. Bleed master cylinder - switch ignition on.
System pressure will increase until pump cuts
out. If pump does not cut out after running for 45
secs, check system for leaks.
11. Bleed hydrostatic circuit calipers - open one front
lower caliper bleed screw. Actuate brake pedal
several times, using only lower two thirds of
pedal travel, until fluid is clear of air bubbles.
Stop actuation if fluid warning light comes on
and allow pressure to build up.
12. Close caliper bleed screw before releasing
pedal, repeat for remaining three hydrostatic
bleed screws.
13. Check/top up reservoir fluid level.
See Fluid
Level Check / Top Up
14. Dry all connections, fully pressurise system,
check for leaks. If two full brake applications
switch on pump, from fully charged, rebleed
system.
70
BRAKES
4
REPAIR
HYDRAULIC BOOSTER UNIT
Service repair no - 70.65.20
Remove
CAUTION: Do not allow booster unit to be
dropped or rested on its front face.
Damage to plastic tangs of multiplug could
occur, requiring fitting a new booster unit
1. Disconnect battery negative lead. Depressurise
system.
See Depressurising System
2. Thoroughly clean area around booster unit outlet
ports and electrical connector.
3. Disconnect electrical multiplug and connector
from low fluid switch. Remove booster earth
strap.
4. Remove brake pipes and hydraulic pipes to
accumulator and hydraulic power unit.
NOTE: Each outlet port is numbered, each
brake pipe is marked with corresponding
number for reassembly. Immediately seal
each pipe and outlet port to prevent ingress of
foreign matter.
5. Inside vehicle: Remove lower dash panel and
knee bolster, where fitted.
6. Release spring clip and clevis pin from brake
pedal.
7. Remove 4 nuts securing booster unit.
8. Remove booster unit.
Refit
NOTE: New booster units are supplied in a
sealed pack marked with a ’use by’ date.
DO NOT fit a booster if date has elapsed,
or if pack is not sealed. DO NOT open sealed pack
until ready to fit unit.
9. Reverse removal procedure. Ensuring correct
fitting of pipes. Tighten booster fixings to
25 Nm
and pipes to
15 Nm.
10. Fit clevis pin into UPPER of two holes in brake
pedal.
11. Adjust brake light switch: pull red (later vehicles,
white) sleeve and black plunger fully forward.
Pull brake pedal back fully to reset switch.
12. Bleed brake system.
See Brake System Bleed
(ABS)
ABS
5
REPAIR
RESERVOIR (INCLUDE SEALS)
Service repair no - 70.65.22
Remove
1. Disconnect battery negative lead.
2. Depressurise system.
See Depressurise
System
3. Disconnect low fluid warning plug.
4. Remove reservoir cap. Remove hose from
pump, plugging exposed apertures.
5. Remove securing bolt, adjacent to low pressure
hose.
6. Ease reservoir from booster unit.
7. Remove two seals from top of booster unit.
Avoid damage to seals which could result in
rubber particles entering system. Plug booster
unit apertures
Refit
8. Lubricate and fit new seals. Refit reservoir.
Tighten securing bolt to
10 Nm.
9. Bleed pump. Check/top up fluid level.
HYDRAULIC POWER UNIT
Service repair no - 70.65.20
Remove
1. Disconnect battery negative lead.
2. Depressurise system.
See Depressurise
System
3. Disconect braided hose to accumulator.
4. Disconnect low pressure hose to reservoir,
clamp hose to prevent fluid loss and ingress of
debris.
5. Disconnect pressure switch plug.
6. Disconnect power unit connector.
7. Working below unit remove four nuts and plain
washers.
8. Remove hydraulic power unit complete with
mountings. Note position of earth strap, if fitted,
when removing mountings.
Refit
9. Reverse removal procedure. Fit new sealing
washers on high pressure hose.
10. Bleed system.
See Brake System Bleed
(ABS)
70
BRAKES
6
REPAIR
ACCUMULATOR
Service repair no - 70.65.21
WARNING: The accumulator is precharged
with nitrogen at up to 80 bar. Handle with
extreme caution. DO NOT puncture or burn
if disposal is necessary.
Remove, refit and disposal
1. Disconnect battery negative lead.
2. Depressurise system.
See Depressurise
System
3. Remove fluid inlet and outlet pipes from
accumulator.
4. On driver’s side of vehicle, release rear of front
wheel arch inner liner.
5. From inside wheel arch, remove two nuts and
plain washers securing accumulator bracket to
wing valance
6. Remove accumulator assembly.
Do not carry
out further dismantling if component is
removed for access only.
7. Remove nuts and plain washers and remove
bracket from accumulator.
Refit
8. Reverse removal procedure. Fit new sealing
washers on high pressure hose.
9. Bleed brakes.
See Brake System Bleed (ABS)
Disposal
WARNING: It is essential that safety
goggles and gloves are worn when
carrying out this procedure.
1. Secure accumulator firmly using a suitable vice.
2. Drill 5mm diameter hole in accumulator, opposite
hole fluid ports, to depressurise nitrogen
chamber.
3. Dispose of accumulator in normal way.
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