Inspection - Lifan 620 Maintenance Manual

12) Remove the oil seal of piston. Take out the oil seal from the brake slave cylinder by a
screwdriver. See Fig. 2-55.

(2) Inspection

1) Inspect eh brake slave cylinder and piston. Check if the piston is rusty or scratched.
2) Check the lining thickness of the brake pad. Measure the thickness by a ruler. See Fig. 2-56.
Standard thickness: 11.0mm; min thickness: 1.0mm.
3) Check the sheet steel of the front brake wear indicator. Make sure that the sheet steel is
sufficiently flexible and free of rust, dirt and other foreign material, and has no crack or wear.
4) Check the thickness of the brake disc. Measure the thickness of the brake disc by a micrometer
caliper. Standard: 25.0mm; min: 23.0mm.
5) Take off the front brake disc.
① Mark on the brake disc and wheel hub.
Take off the brake disc.
②
6) Install brake disc. Note: Install it through the part with min thickness.
7) Check the brake disc swaying.
Temporarily tighten the brake disc.
①
② Measure the swaying of brake disc at 10mm away from the outer edge of brake disc by a dial
indicator. See Fig. 2-57. Max: 0.05mm.
③ In case that the swaying of brake disc reaches or exceeds the limit, check the axial clearance of
the bearing and the swaying of wheel hub. If both bearing and hub are normal, adjust the swaying
of brake disc.
(3) Installation
1) Temporarily screw down the air discharging bolt on the front brake slave cylinder.
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Fig. 2-55
Fig. 2-56
Tightening torque: 103N·m.
Fig. 2-57
140
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