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12-14-support-perednego-tormoza.html
12.14. Support of a forward brake
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1. Remove a wheel.
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2. Turn out a hollow bolt and disconnect from a support a brake hose. For an exception of an effluence of brake liquid close an opening in a brake hose a suitable stopper. |
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3. Turn out two bolts and remove a support with the brake cylinder. |
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Dismantling
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1. Twist directing fingers and remove a support from the holder. |
2. A screw-driver with a direct sting remove a ring of a dustproof cover of the piston.
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3. Remove a piston cover. |
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4. The compressed air squeeze out the piston from the support cylinder.
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At piston expression by the compressed air have no fingers in front of the piston. |
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5. An edge of a screw-driver remove a sealing ring from the piston, thus do not damage a cylinder surface. |
6. Clear brake liquid an external surface of the piston and an internal surface of the cylinder.
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Check
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| 1. Check the support cylinder on lack of wear, damages, cracks and a rust.
2. Check the piston on lack of a rust, damages, cracks and wear of an external surface.
3. Check the plug and directing finger on absence of damages and a rust.
4. Check brake shoes on absence of deformation, a raid of metal and oil traces.
5. Check the wear indicator on lack of wear and damages.
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6. Measure thickness of a brake disk. By the indicator of hour type measure palpation of a brake disk at small distance from external edge. Thickness of a brake disk:
The nominal: 24 mm
The minimum admissible: 22,4 mm
Maximum permissible palpation: 0,08 mm.
Maximum permissible difference of thickness of a brake disk: 0,01 mm
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7. If necessary, replace a brake disk.
Lift the car and fix it on support.
Remove a wheel.
Remove a support and fix it a wire.
Remove a forward brake disk.
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Check of a brake disk
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1. Turn out bolts of fastening of a support, lift a support up and fix it a wire. |
2. Slowly turning a brake disk, visually check its condition from two parties. Wear of a brake disk from blocks should be in admissible limits. If there are cracks on a disk, the disk is subject to replacement.
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3. The indicator of hour type check palpation of a brake disk. The indicator of hour type fix in any convenient place and, turning a brake disk, define its palpation at distance of 5 mm from external edge.
Maximum permissible palpation: 0,05 mm.
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Tighten nuts of fastening of a wheel to fix a brake disk on a nave.
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Correction of palpation of a brake disk
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1. If palpation of a brake disk exceeds maximum permissible value, change the provision of a disk in relation to a nave and repeatedly measure palpation of a brake disk.
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Before shift of a brake disk, note the party of a nave of a wheel in which the maximum palpation is observed.
Remove a brake disk, then establish the indicator of hour type as is shown in drawing, move a nave to the axial direction and will measure люфт.
Maximum permissible люфт: 0,05 mm
If люфт exceeds maximum permissible, check each element of a suspension bracket.
If люфт does not exceed maximum permissible value, establish a brake disk in the situation turned on 180 ° from a label and repeatedly measure palpation of a brake disk.
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2. If palpation cannot be eliminated with shift of a brake disk, replace a brake disk or process it on the special machine (" MAD, DL–8700 PF" or equivalent). The processed brake disks a part have smaller palpation, than new brake disks. |
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Check of thickness of a brake disk
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1. By a micrometer measure thickness of a disk in eight places, approximately through everyone 45 ° at distance of 10 mm from external edge of a disk.
Thickness of a brake disk:
The nominal: 24 mm
The minimum admissible: 22,4 mm
Maximum permissible difference of thickness of a brake disk (in 8 places): 0,015 mm
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2. If thickness of a brake disk of less maximum permissible, replace a brake disk. |
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Assembly
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1. Clear all details isopropyl alcohol, except for brake shoes.
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2. Put special greasing on a sealing ring of the piston and establish it in a piston flute. |
3. Grease an external surface of the piston and establish it in the support cylinder.
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4. Establish a cover of the piston and a ring of fastening of a cover. |
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5. Establish covers of directing fingers and directing fingers. |
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Installation
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1. Establish brake shoes and a support.
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2. Screw and tighten the demanded moment of an inhaling a hollow bolt of fastening of a brake hose.
Moments of an inhaling of the union of pumping: 7–13 N • m
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3. Fill in in a tank brake liquid.
4. Remove air from a hydraulic drive of brake system. Several times press a pedal of a brake and check absence of leakage of brake liquid.
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