Defender 90 NAS. Manual — part 70
70
BRAKES
14
REPAIR
14. Coat piston with brake fluid. Insert it squarely
into bore. Do not tilt piston during insertion and
leave 8mm, 0.2 in projecting from bore.
15. Coat a new wiper seal with brake fluid and fit to
new seal retainer. Slide assembly, seal first, over
protruding piston into bore recess.
16. Using special tool LRT-70-500- piston clamp,
press home seal retainer and piston.
Mounting inboard piston
17. Carry out same procedure as for removing and
fitting outboard piston and seals, instructions 8 to
16.
Fit calipers and pads to vehicle
18. Fit caliper to axle, tighten bolts evenly to
82 Nm,
60 lbf ft.
19. Connect brake pipe to caliper. Tighten to
15 Nm,
11 lbf ft.
20. Remove clamp from flexible brake hose.
21. Insert pads and retaining springs, secure in
position with new retaining pins and spread
ends. Ensure retaining springs are located
correctly.
22. Bleed brake system.
See Brake System Bleed
23. Press brake pedal firmly several times to locate
pads.
24. Fit road wheels, remove axle stands and finally
tighten road wheel nuts,
130 Nm, 95 lbf ft.
25. Road test vehicle.
CAUTION: New brake pads require
’bedding-in’, for several hundred miles
before brakes are at maximum efficiency.
REAR BRAKE DISC
Service repair no - 70.10.11.
Remove
1. Remove rear hub assembly.
See REAR AXLE
AND FINAL DRIVE, Repair, Rear hub
assembly .
2. Remove 5 nyloc nuts securing road speed
sensor ring to disc.
3. Remove sensor ring.
4. Remove disc bolts.
5. Remove disc from rear hub.
Refit
6. Fit disc to rear hub.
7. Apply loctite 270 and fit disc bolts. Tighten to
73
Nm, 54 lbf ft .
8. Using new nyloc nuts fit sensor ring.
9. Check total disc run out, this must not exceed
0,15 mm, 0.006 in. If necessary reposition disc.
10. Fit rear hub assembly.
See REAR AXLE AND
FINAL DRIVE, Repair, Rear Hub Assembly .
Disc reclamation
11. Check disc thickness. The disc may be
machined to minimum thickness of 12 mm,
0.472 in. Machine equal amounts off each face.
NOTE: The brake disc MUST BE renewed if
the minimum running thickness stamped
on the disc is recorded.
BRAKES
15
REPAIR
TRANSMISSION BRAKE
1. Pin
2. Washer
3. ’C’ clip
4. Brake shoe
5. Cable lever
6. Hold down spring
7. Dished washer
8. Brake drum
9. Screw
10. Brake cable
11. Adjuster slide
12. Adjuster nut
13. Spring
14. Adjuster slide
15. Adjuster bolt
16. Dished washer
17. Hold down spring
18. Brake shoe
19. Hold down pin
20. Hold down pin
21. Abutment plate
22. Back plate
23. Spring
70
BRAKES
16
REPAIR
TRANSMISSION BRAKE SHOES
Service repair no - 70.45.18
Remove
1. Park vehicle on level ground, chock road wheels
and release park brake. Alternatively, raise
vehicle on a ramp.
2. Disconnect rear propeller shaft from
transmission output flange at brake drum.
3. Slacken off transmission brake drum adjustment
bolt.
4. Remove single screw securing brake drum to
output flange.
5. Withdraw drum to expose brake assembly.
6. Release top and bottom springs from brake
shoes.
7. Grip dished washer with a pair of pliers, depress
washer and turn through 90
°
.
8. Remove dished washer, complete with hold
down spring and pin from both shoes.
9. Move brake shoes out from adjuster slides,
release from abutment plate and remove from
backplate.
10. Check that springs are satisfactory for continued
use.
NOTE: If new brake shoes are to be fitted,
the springs should also be renewed.
Refit
11. Locate RH brake shoe in slide and secure brake
shoe and lever assembly to backplate with hold
down pin, spring and dished washer.
12. Locate LH brake shoe in slide and fit abutment
plate between both brake shoes. Secure LH
shoe with hold down pin, spring and dished
washer.
13. Fit pull-off springs to brake shoes.
14. Fit brake drum. Tighten screw to
25 Nm, 18 lbf
ft.
15. Check that park brake lever is released.
16. Screw in and tighten adjuster bolt until brake
drum will not rotate by hand.
17. Tighten adjuster bolt to
25 Nm, 18 lbf ft to
ensure brake drum is locked.
18. Slacken off adjuster bolt by 1… turns to give
shoes a running clearance. Check that the drum
is free to rotate.
19. Fit propeller shaft to output flange. Tighten
fixings to
46 Nm, 34 lbf ft.
20. Remove wheel chocks and check operation of
park brake.
BRAKES
17
REPAIR
PARK BRAKE CABLE
Service repair no - 70.35.25
Remove
1. Park vehicle on level ground, chock road wheels
and release handbrake. Alternatively, raise
vehicle on ramp [hoist].
2. From inside vehicle, pull up handbrake gaiter.
3. Remove split [cotter] pin, clevis pin, washer and
disconnect cable from park brake lever.
4. Slacken off transmission brake drum adjusting
screw.
5. Disconnect propeller shaft from output flange.
6. Remove retaining screw and withdraw brake
drum.
7. Release park brake cable clevis from abutment
on cable lever, see J6337, and pull through
aperture in back plate.
8. Pull cable from heelboard and remove from
vehicle.
Refit
9. Feed new cable through heelboard ensuring
rubber grommet is correctly located.
10. Position cable over guide plate, insert through
backplate and connect to cable lever.
11. Fit cable to park brake lever and secure with
clevis pin and split [cotter] pin.
12. Fit brake drum. Tighten screw to
25 Nm, 18 lbf
ft.
13. Screw in and tighten adjuster bolt until brake
drum will not rotate by hand.
14. Tighten adjuster bolt further to
25 Nm, 18 lbf ft
to ensure brake drum is locked.
15. Slacken off adjuster bolt by 1… turns to give
brake shoes running clearance. Check that the
drum is free to rotate.
16. Slacken locknut and adjust cable to give the
park brake pawl 2 notches free movement on the
rachet before being fully operational on 3rd
notch (brake shoes are fully expanded against
drum).
NOTE: Cable adjustment is for a new cable
or to compensate for cable stretch. Cable
adjustment must not be used to take up
brake shoe wear.
17. Fit propeller shaft to output flange. Tighten
fixings to
46 Nm, 34 lbf ft.
18. Remove wheel chocks and check operation of
handbrake.
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст