300Tdi Defender | Rear Brake Disc for Improved Braking Performance
70
BRAKES
14
REPAIR
REV: 09/97
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 2 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
or fit new split pins, depending on vehicle model.
Note correct position of retaining springs on 90
models.
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. Finally
tighten road wheel nuts to correct torque:
Alloy wheels -
130 Nm (96 lbf/ft)
Steel wheels -
100 Nm (80 lbf/ft)
Heavy duty wheels -
170 Nm (125 lbf/ft)
25. Road test vehicle. Note 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 disc bolts.
3. Remove disc from rear hub.
Refit
4. Fit disc to rear hub.
5. Fit disc bolts. Tighten to
73 Nm (54 lbf/ft).
6. Check total disc run out, this must not exceed
0,15 mm (0.006 in). If necessary reposition disc.
7. Fit rear hub assembly
See REAR AXLE AND
FINAL DRIVE, Repair, Rear Hub Assembly .
Disc reclamation
8. Check disc thickness. This dimension may be
machined to minimum thickness of 12 mm.
Machine equal amounts off each face.
NOTE: The brake disc MUST BE renewed if
the minimum running thickness stamped
on the disc is recorded.
