Forcing a jet of compressed air through the aperture for
brake liquid, push out pistons 14 from the cylinder block and take
out sealing rings 4.
The reassembly of the front brake is carried out in sequence
reverse to dismantle. When assembling, lubricate the sealing
rings, pistons and cylinder mirrors with brake liquid, and grease
the protective caps with Ñí-1.
Components inspection
Carefully examine all components, having previously washed
them in warm water with washing liquid and dried by a jet of com-
pressed air.
If on pistons and on cylinder mirrors any traces of wear or
jamming are found, renew the cylinder block complete with pis-
tons.
Note.
In all cases, when the piston is taken out from the cylin-
der, it is recommended to renew the dust cap and the sealing
rings in the cylinder block flutes to ensure satisfactory operation
of the system.
Brake disc runout check
Check the axial runout of the brake disc without removing it
from the vehicle (fig. 6-15). The maximum allowable runout by
the indicator is 0.15 mm; if the runout is greater, it is necessary
to grind the disc, but the final thickness of the disc after grinding
should be no less than 9.5 mm. In case of damage or very deep
risks, and also if wear exceeds 1 mm on each side, renew the
disc.
Replacement of brake pads
Renew the pads, if the friction lining thickness has decreased
to 1.5 mm.
To replace the pads do the following:
- remove the pins from the shaft of the upper clamping lever,
take out the shaft and remove the lever; remove the caliper
129
Fig. 6-13. Removing the front brake:
Arrows are pointing to the bolts that should be undone to remove the front brake
Fig. 6-14. Front brake components:
1 - carrier; 2 - caliper; 3 - piston cap; 4 - sealing ring; 5 - cylinder block; 6 - brake pads; 7 - brake disc; 8 - caliper dust cover; 9 - brake splash guard; 10 - bleeder;
11 - brake hoses; 12 - cylinder block detent; 13 - detent spring; 14 - piston; 15 - clamping lever spring; 16 - clamping lever; 17 - pin; 18 - clamping lever shaft
Summary of Contents for Niva 4x4
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