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Chery QQ6 (S21) / S12LHD. Manual - part 45

2. Preparation

Tools: ratchet wheel, lug bar, 13#, 14#, 16#, 18#, 19#, 32# sleeves, 10#, 13#, 14#, 16# box

wrenches, vice, torque spanner, surveying rod.

Accessories: brake fluid

3. Precautions

3.1 Please wear necessary labor protection supplies to avoid accidents.

3.2 The brake fluid is noxious. If it contacts your skin or eye(s) by careless, please use a lot of

clean water to wash the skin or eye(s), and go to see a doctor in time, if necessary.

3.3 Waste brake fluid shall be put in vessels. DO NOT pour the fluid into the sewage system or

store the fluid together with the domestic wastes.

3.4 DO NOT step on the brake pedal and move the vehicle during the disassembly/reassembly

operation.

3.5 DO NOT make the friction lining or friction disc stained with the oil/fluid which may reduce

the braking effeciency.

4. Removal and Maintenance

4.1 Remove the tightening nuts from tire with a 19#

torque spanner or attached wrench, and the take off the tire.

Torque: 110±10N.m.

4.2 (Check the thickness of friction lining) Unscrew

the fixing bolt as shown in the picture with a 14# torque

spanner and a sleeve.

Torque: 22-23N.m.

Fixing Bolt

4.3 Unscew the fixing bolt as shown in the picture with

a 14# torque spanner and a sleeve.

4.4 Unscrew the brake caliper housing.

4.5 Take off two friction linings.

4.6 Measure the thickness of friction lining. If the thickness

is below 3 mm, please replace it in time, and the lining

shall be replaced in pairs.

Fixing Bolt

Caliper Housing

Fixing Bolt

4.7 (Maintenance of brake wheel cylinder) Unscrew two fixing bolts as shown in the picture

below with a 18# torque spanner and a sleeve.

Torque: 74-91 N.m

4.8 Unscrew the bolt as shown in the picture below with

a 13# torque spanner, and then take off the caliper assy.

CAUTION: The brake fluid is noxious. DO NOT splash

the brake fluid to your cloth or skin when the brake hose

was removed

4.9 Detach the caliper assy with a 14# spanner.

4.10 Remove the dustproof seal and check the damage

of dustproof seal. If necessary, replace it. Clean the

contact surface of brake piston and apply a thin layer of

muffler paste. Attention that the dustproof seal is NOT

allowable to contact the muffler paste because it may make

the seal swell.

Two

Bolt

4.11 Remove the piston. Prepare a wood plate applicable

to block the piston, and place the plate into the position

between the piston and caliper wall. Carefully press out the

piston via the connecting hole with the compressed air.

Place a protective plate (hard wood, etc) into the notch of

brake caliper to protect the piston.

CAUTION: DO NOT hole the piston with your fingers—

Clamped Hazard! It is unallowable to remove the caliper

piston as desired. It can be removed and reinstalled only by

profeesionals or under the dirctions of professionals.

4.12 Check the guide sleeve. Push the guide sleeve by hand,

and the sleeve shall move flexibly and freely. If clamped or

inflexible, replace it. Attention that lubricating grease shall

be applied on the guide sleeve when reassembling.

4.13 Carefully remove the seal ring with a plastic needle,

and clean the brake cylinder and parts with alcohol. And dry

them with the compressed air. Carefully check the brake

cylinder, piston and flange surface. It is unallowable to

machine the brake cylinder and piston.

4.14 (Installation of brake wheel cylinder) Apply a thin

layer of brake cyliner paste on the cylinder body, plunger and

seal collar. Install the seal ring into the ring groove at the rear

of brake cyliner. Install the dustproof seal into the front ring

groove, and press it completely into the groove.

Content .. 43 44 45 46 ..