6.1.9. Dismantling, check and assembly of a brake support

Remove a forward wheel.

Unscrew a bolt of fastening of a brake hose to a support.

Unscrew bolts of fastening of the cylinder of a support.

Remove the cylinder and brake shoes.

Fig. 6.25. Bolts of fastening of a support to a rotary fist

Unscrew bolts of fastening of a support to a rotary fist (fig. 6.25).

Remove a support.

Remove a piston boot.

Fig. 6.26. Piston extraction from a support

By means of the compressed air squeeze out the piston from a support (fig. 6.26).

Fig. 6.27. Removal of consolidation of the piston

By means of a screw-driver remove from a support piston consolidation (fig. 6.27).

NOTE Do not place fingers between the piston and a support. Be careful, do not spray brake liquid.

Check a support on lack of wear, cracks, rusts in openings under pistons.

Estimate a condition of pistons. At wear or teases replace the piston.

Check a plug and finger condition.

Be convinced of absence of damages of springs of blocks and boots of pistons.

Fig. 6.28. Measurement of thickness and palpation of a brake disk

Measure thickness and palpation of a brake disk (fig. 6.28).

ATTENTION Do not restore a piston surface an emery paper. It is impossible to establish all rubber details repeatedly.

The nominal: 24 mm.

The limiting: 22,4 mm.

Disk palpation: 0,08 mm, no more.

Difference of thickness of a brake disk: 0,01 mm.

NOTE The difference of thickness of a brake disk is defined by a difference of the minimum and maximum thickness measured in eight points on a circles approximately in 10 mm from edge of a disk.

Palpation of a disk is determined by a circle in 5 mm from disk edge.

At impossibility of carrying out repair replace a brake disk.

Wash out all details (except blocks and laying of blocks) isopropyl alcohol.

Grease piston consolidation by special greasing and establish consolidation in a flute of an opening of a support.

Fig. 6.29. Piston and boot

Establish the piston and its boot (fig. 6.29).

Grease with special greasing a support opening under the piston, an external surface of the piston and a boot.

Fig. 6.30. Scheme of installation of the piston and boot

Establish a boot on the piston, as is shown in drawing 6.30.

Insert a boot into a flute of an opening of a support, push the piston in a support.

Fig. 6.31. The scheme of assembly of sliding parts of a support

Collect sliding parts of a support (fig. 6.31).

Grease with special greasing the plug, a finger and a support opening under the plug. Grease also plug and finger boots.

Establish a boot in a flute of an opening of a support.

Establish brake shoes.

NOTE Do not allow greasing hit on blocks and a brake disk. Before an inhaling of bolts be convinced that surfaces of a sliding finger and a directing bolt are not damaged. Pump over brake system. Be convinced of absence of leakages of brake liquid.