Chery T21 2014 Service Manual page 1219

8. Remove the rear disc brake piston seal ring.
a. Using a screwdriver wrapped with protective tape,
carefully pry out the rear disc brake piston seal ring
(arrow) from brake cylinder rear ring groove.
Inspection
1. Check brake cylinder and the piston.
a. Check piston and bore for scratches or corrosion. If there are scratches or corrosion, remove them with
fine sand cloth.
b. Remove dirt on piston with a soft brass wire brush and coarse cloth. Do not clean the piston with
polishing cloth or sand cloth, as this may damage its surface. If surface of piston is damaged, replace it.
If piston is stuck or bore is worn or corroded, replace entire brake caliper assembly. Using polishing
cloth to remove small corrosion points inside the bore.
2. Check brake caliper fixing bracket and brake caliper guide pin set.
a. Clean the contact surface of brake caliper fixing bracket and brake lining support gasket with brake
cleaner. Check for deformation, cracks, rust and foreign matter which is difficult to remove.
b. Check brake caliper guide pin rubber dust boot for deformation, cracks, worn and foreign matter which
is difficult to remove.
c. Install brake caliper guide pin and brake caliper guide pin rubber dust boot to brake caliper fixing
bracket. The brake caliper guide pin set should move smoothly without being stuck when pushing it with
hand; otherwise replace it.
d. After installing the brake lining, check if it is easy to fall out (due to insufficient elasticity of support
gasket). Replace as necessary.
3. Check brake lining.
a. Visually check brake lining for flatness, and also check for excessive wear. If condition of lining cannot
be confirmed accurately only by visual inspection, a physical check will be used as necessary.
b. Measure the minimum brake lining thickness. When
the minimum thickness of brake lining is 2 mm or less,
replace the brake lining.
c. When replacing excessively worn brake linings (inner and outer), it is also necessary to replace linings
on the opposite side of vehicle as well as unchecked linings to maintain proper braking performance. If
it is unnecessary to replace brake linings, be sure to reinstall brake linings to the original positions.
4. Check brake disc.
a. Minor scratch or wear on brake disc surface is acceptable. If severe scratch or deformation exists, the
brake disc must be replaced.
Chery Automobile Co., Ltd.
26 - BRAKE
RT21260640
RT21260650
26
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