Ford Sierra

1982-1993 of release

Repair and car operation

3.1.4.10.2. Service and repair

GENERAL INFORMATION

Back disk brake

1–support,
2–holder of a support,
3–a directing finger of a support,
4–protective casing,
5–a bolt of fastening of a support to the holder,
6–deaerator,
7–lever of the hand brake,
8–spring,

9–elements of actuating of the piston after inclusion of the hand brake,
10-piston,
11-brake shoes,
12-brake disk,
13-nave of a wheel,
14-sealing ring,
15-bearing of a nave of a wheel,
16-board of a brake disk

FORWARD BRAKES

Service and repair of forward brakes are carried out in the same way, as well as brakes without anti-blocking system (see subsection 10.2).

BACK BRAKES

Replacement of brake columns

Prevention

It is recommended to replace at the same time all brake shoes of both back brakes at achievement of the minimum thickness at least with one of brake shoes. It is necessary to use brake shoes specified brand and type.

PERFORMANCE ORDER

1. To weaken nuts of fastening of back wheels.
2. To check, whether the hand brake is switched on.
3. To lift and fix a back part of the car on supports and to remove back wheels.
4. To disconnect a cable of the hand brake from a bracket on the lever of a back suspension bracket.
	5. To weaken a back bolt of fastening of a support to the holder, holding with a flat key directing finger of a support.
6. To unscrew and take a forward bolt of fastening of a support to the holder, holding with a flat key directing finger of a support.
	7. To turn a support up concerning the holder (on back to a fastening bolt).
8. To take brake shoes.
9. Carefully to press the piston in the support cylinder by means of the corresponding wooden whetstone, paying attention not to damage an elastic casing of the piston.
10. To check: – condition of a casing of the piston; – condition of a surface of a support; – condition of a brake disk; – lack of traces of an effluence of brake liquid.
	11. To establish new brake shoes.
12. To turn a support (on back to a fastening bolt).
13. To insert a plate protecting from vibration (if it is used).
14. To tighten the corresponding moment bolts of fastening of a support to the holder.
15. To hook on a cable of the hand brake for a bracket of the lever of a back suspension bracket.
16. To check, whether the brake disk can freely rotate at the released pedal of a brake.
17. To put on back wheels and to lower the car.
18. To tighten nuts of fastening of back wheels the corresponding moment.

Removal and support installation

Prevention

Before removal of a support it is necessary to merge the hydraulic accumulator of brake system. For this purpose it is necessary to switch off ignition and to press against the stop a brake pedal (about 20 times) while it does not become "firm".

PERFORMANCE ORDER

1. To weaken nuts of fastening of back wheels.

2. To lift and fix a back part of the car and to remove the corresponding wheel.

3. To lift and fix a back part of the car and to remove the corresponding wheel.

4. To disconnect a cable of the hand brake from the lever on a support.

5. To disconnect brake hoses from pipelines. Openings in pipelines to close the corresponding caps.

6. To unscrew and take bolts of fastening of the holder of a support.

7. To remove the holder of a support and a support.

8. For installation of a support it is necessary to execute actions in return sequence in relation to process of its removal and to remove air from brake system.

Dismantling and support assembly

The method of dismantling and assembly of a support is described at removal and installation of brake shoes (see subsection 10.3.2).

Support repair

PERFORMANCE ORDER

1. To remove a brake support (see above).

2. To disconnect a support from the holder.

3. To establish a support in a vice.

4. To extend the piston from a support by means of the adaptation 12.006 so that he acted from the cylinder approximately on 20 mm.

5. To remove an elastic casing from a piston flute.

6. Completely to take the piston from the cylinder.

7. To take an elastic casing of the piston.

8. Carefully to wash up the piston and the cylinder.

9. Attentively to check a condition of all details. All scratches or wear tracks on a surface of the piston or the cylinder mean obligation of replacement of a complete support.

10. At assembly it is necessary to replace all consolidations and to grease components with brake liquid.

11. To connect a support to his holder.

12. To establish and fix a support in the car (see subsection 10.2.2).

13. To remove air from brake system.

Replacement of a brake disk

PERFORMANCE ORDER

1. To weaken nuts of fastening of the corresponding back wheel.

2. To lift the car and to remove a wheel.

3. To disconnect a cable of the hand brake from a bracket on the lever of a back suspension bracket.

4. To unscrew two bolts of fastening of a support.

5. To suspend a support under the car by means of a soft wire, paying attention not to damage brake hoses.

6. To designate the provision of a disk concerning a wheel nave.

7. To take a spring adjusting ring of a brake disk.

8. To take a brake disk.

9. To establish a brake disk in relation to a wheel nave according to the designations executed at removal, and to put on a spring adjusting ring.

10. To fix a support.

11. To hook on a cable of the hand brake for a bracket on the lever of a back suspension bracket.

12. To establish a wheel and to lower the car.

13. To tighten nuts of fastening of a wheel the necessary moment.

14. To press several times a brake pedal, to bring brake shoes into contact to a brake disk.