15:10. Support of a forward brake
Removal
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- Remove a forward wheel.
- Turn out a hollow bolt and disconnect a brake hose from a support.
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For an exception of an effluence of brake fluid close an opening in a brake hose a suitable stopper. |
- Turn out bolts of fastening of a support.
- Remove a support and brake shoes.
- Turn out bolts of fastening of the holder of a support to a rotary fist.
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- Remove the support fastener.
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Check
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- Check a support for lack of wear, damages, cracks and a rust.
- Check the piston for lack of a rust, damages, cracks and wear of an external surface.
- Check the plug and the directing finger for absence of damage and rusts.
- Check a spring and covers for absence of damage.
- Check the fastener for lack of wear, damages, cracks and a rust.
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Do not use an emery paper for cleaning of a surface of the piston.
- All rubber details need to be replaced with new.
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- Measure thickness of a brake disk. Measure by the indicator of hour type a beating of a brake disk at small distance from an outer edge.
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Thickness of a brake disk:
Nominal: 24 mm Minimum admissible: 22,4 mm
Maximum permissible beating: 0,08 mm Maximum permissible difference of thickness of a brake disk: 0,01 mm
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- Measure by a micrometer disk thickness in eight places, approximately through everyone 45 ° at distance of 10 mm from an outer edge of a disk.
- The indicator of hour type check a beating of a brake disk. Fix the indicator of hour type in any convenient place and, turning a brake disk, define its beating at distance of 5 mm from the outer edge.
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- If necessary, replace a brake disk.
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Dismantling
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- Remove a dustproof cover of the piston.
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- Compressed air squeeze out the piston from the support cylinder.
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- At expression of the piston have no compressed air fingers in front of the piston.
- Be careful as from the channel compressed air together with the piston blows brake fluid.
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- Edge of the screw-driver remove a sealing ring from the piston.
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Assembly
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- Clear all details, except for brake shoes, isopropyl alcohol.
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- Apply special lubricant on a sealing ring of the piston and establish it in a piston flute.
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- Collect the piston and covers of the piston in the following order:
– apply special lubricant on support cylinder walls, the external surface of the piston and a cover of the piston; – establish a piston cover as it is shown in the drawing; – insert a piston cover into an internal flute of a support and move the piston into a support.
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- Collect mobile details in the following order:
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– apply special lubricant on the external surface of the plug, the directing finger and in an opening for the plug and establish protective covers;
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– insert covers into support flutes.
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- Establish brake shoes.
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Never you apply lubricant on a brake disk and brake shoes. |
- Screw and tighten the required inhaling moment a hollow bolt of fastening of a brake hose.
Inhaling moments:
The directing finger: 35–45 N • m Bolt of fastening of the directing finger: 22–33 N • m Support fastener bolt: 65–75 N • m Hollow bolt of fastening of a brake hose: 25–30 N • m
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- Before installation check that surfaces of bolts and the directing finger are not damaged.
- Remove air from the hydraulic drive of the brake system. Several times press a pedal of a brake and check lack of leak of brake fluid.
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Installation
Installation is carried out to the sequences, the return to removal.
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- Establish brake shoes and a support. Never you apply lubricant on a brake disk and brake shoes.
- Screw and tighten the required inhaling moment a bolt of fastening of a support.
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- Screw and tighten the required inhaling moment a hollow bolt of fastening of a brake hose.
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- Fill in brake fluid in a tank. Remove air from the hydraulic drive of the brake system. Several times press a pedal of a brake and check lack of leak of brake fluid.
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