Defender 300Tdi (1996+). Manual — part 69
BRAKES
3
DESCRIPTION AND OPERATION
90 Models
110/130 Models
Hydraulic system
A- Primary circuit
B- Secondary circuit
C- Pressure reducing valve (PRV)
1. LH rear brake caliper
2. T connector
3. RH rear brake caliper
4. Brake servo
5. Master cylinder and reservoir
6. LH front brake caliper
7. RH front brake caliper
BRAKES
1
REPAIR
GENERAL BRAKE SERVICE PRACTICE
Brake fluid precautions
WARNING: Do not allow brake fluid to
come into contact with eyes or skin.
CAUTION: Brake fluid can damage
paintwork, if spilled wash off immediately
with plenty of clean water.
CAUTION: Use only correct grade of brake
fluid. If an assembly fluid is required use
ONLY brake fluid. Do NOT use mineral oil,
i.e. engine oil etc.
CAUTION: Thoroughly clean all brake
calipers, pipes and fittings before
commencing work on any part of the brake
system. Failure to do so could cause foreign
matter to enter the system and cause damage to
seals and pistons which will seriously impair the
efficiency of the brake system. To ensure the
brake system efficiency is not impaired the
following warnings must be adhered to :-
DO NOT use any petroleum based cleaning
fluids or any proprietary fluids containing
petrol.
DO NOT use brake fluid previously bled from
the system.
DO NOT flush the brake system with any fluid
other than the recommended brake fluid.
The brake system should be drained and flushed
at the recommended service intervals.
Cover all electrical terminals carefully to make
absolutely certain that no fluid enters the
terminals and plugs.
FLUID LEVEL CHECK/TOP UP
WARNING: Clean reservoir body and filler
cap before removing cap. Use only fluid
from a sealed container.
1. Park vehicle on level ground.
2. Check level is between ’MIN’ and ’MAX’ marks.
3. If level is below ’MIN’ mark top up fluid level to
’MAX’ mark on reservoir, using correct fluid.
See
LUBRICANTS, FLUIDS AND CAPACITIES,
Information, Recommended lubricants and
fluids
CAUTION: Do not fill reservoir above
maximum line.
70
BRAKES
2
REPAIR
BRAKE SYSTEM BLEED
Service repair no - 70.25.02
Preparation
WARNING: Before bleeding the brake
system refer to general brake service
practice.
See General Brake Service
Practice .
During bleed procedure, brake fluid level must
not be allowed to fall below the MIN level.
To bleed the hydraulic circuits, four bleed
nipples are provided, one at each caliper.
There are two methods by which air can be
removed from the braking system:-
1. MANUAL BLEED PROCEDURE.
2. PRESSURE BLEED PROCEDURE.
Pressure bleed procedure
Purpose designed equipment for pressure filling and
bleeding of hydraulic systems may be used on Land
Rover vehicles. The equipment manufacturer’s
instructions must be followed and the pressure must
not exceed 4.5 bar, 65 lb/in
2
.
Manual bleed procedure
Equipment required
Clean glass receptacle
Bleed hose
Wrench
Approx 2 litres (3 pints) brake fluid.
See
LUBRICANTS, FLUIDS AND CAPACITIES,
Information, Recommended lubricants and
fluids
Master cylinder bleed
1. Disconnect battery.
2. Depress brake pedal fully and slowly 5 times.
3. Release the pedal and wait for ten seconds.
4. Air bubbles will rise into the reservoir during
these instructions.
5. Repeat instructions until a firm resistance is felt
at the pedal.
Complete circuit bleed
1. Disconnect battery.
2. Bleed front calipers, driver’s side first. Fit bleed
hose to bleed screw.
3. Dip free end of bleed hose into brake fluid in
bleed bottle.
4. Open bleed screw of caliper.
5. Depress brake pedal fully several times until fluid
is clear of air bubbles.
6. Keeping pedal fully depressed, tighten bleed
screw, then release pedal.
7. Repeat procedure on other front caliper followed
by rear calipers.
8. Fit all bleed screw protection caps.
9. Check/top-up fluid level when bleeding is
complete
See Fluid Level Check/Top-Up .
BRAKES
3
REPAIR
MASTER CYLINDER
Service repair no - 70.30.08
Before starting repair refer to general brake service
practice
See General Brake Service Practice .
Remove
1. Disconnect battery.
2. Place a container under the master cylinder to
catch escaping brake fluid.
3. Clean area round master cylinder ports.
4. Disconnect pipes from master cylinder ports.
Cover, not plug, the pipe ends to prevent entry of
dirt.
5. Disconnect electrical leads from reservoir cap.
6. Remove two nuts securing master cylinder to
servo and withdraw cylinder.
7. Remove reservoir cap and drain fluid into
suitable container for disposal.
8. The reservoir is a push fit in the master cylinder
and secured by seals. Carefully ease the
reservoir from the master cylinder by rolling it
from the seals. Note that the two seals are
different sizes.
Refit
9. Insert new reservoir seals in the master cylinder
ports and fit reservoir to master cylinder.
10. Ensuring that water ingress seal is in position, fit
master cylinder to servo. Tighten fixings to
26
Nm (19 lbf/ft).
11. Connect brake pipes to master cylinder ports
and tighten to
15 Nm (11 lbf/ft).
12. Fit electrical leads to reservoir cap
13. Fill reservoir with recommended brake fluid.
See
LUBRICANTS, FLUIDS AND CAPACITIES,
Information, Recommended lubricants and
fluids
14. Bleed the brake system
See Brake system
bleed .
15. Reconnect battery and road test vehicle.
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст