Chery A21 2005 Service Manual page 93

CHERY A520 SERVICE MANUAL
SECTION I BRAKE SYSTEM PARAMETER
1) Check brake disc:
The friction surface of brake disc should be flat and has no apparent grooves; otherwise,
brake disc should be replaced.
2) Check the thickness of brake disc:
Use caliber rule to check the thickness of brake disc.
The standard thickness of front disc (ventilation disc) is 22mm with its operating limit of
19mm; when exceeding the operating limit, the front disc should be replaced.
The standard thickness of the rear disc (solid disc) is 10mm with its operating limit of 7mm;
when exceeding the operating limit, the rear disc should be replaced.
3) Check brake disc runout:
Use micrometer guage to check the runout degree of brake disc surface. The operating limits
of front disc and rear disc are both 0.03mm respectively.
4) Check the thickness of brake lining:
The standard thickness of front brake lining is19.3mm and the operating limit is 9mm. The
residual thickness of brake pad thickness limit should be not less than 1mm (coated plate:
5mm, noise insulator: 0.6m).
The standard thickness of rear-brake lining is 16mm with its operating limit of 8 mm. The
residual thickness of brake pad thickness limit should be not less than 1mm (coated plate:
5.5mm, noise insulator: 0.3m).
5) Remark:
Before dismounting the wheel, you should check the thickness of external brake lining
through the aperture in the wheel spoke, or dismount the wheel to have a check.
Important Notice:
² After replacing the friction lining or brake disc, you should step on the brake for several
times in order to ensure a break-in between the brake lining and brake disc. Thus, the
safety can be guaranteed.
²
After replacing the brake lining, you should check whether the brake fluid level is
positioning between MIN and MAX.
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CHAPTER I BRAKE SYSTEM
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