Great Wall service chassis and body Manual - part 54

BR-12

Brake System

 Vacuum Booster

4.

Mount the pedal return spring.

5.

Mount the brake master cylinder

(see Page BR-8)

6.

Connect the hose and the vacuum booster.

7.

Fill the oil cup with brake liquid and exhaust the air in

braking system.

(see page BR-6)

8.

Check the liquid leakage;

9.

Check and adjust the brake pedal

(See page BR-5)

10. Check the operation

(See Page BR-6)

BR-13

Front Brake

Element figure

No. 2 lock plate of brake pad

No. 1 lock plate of brake pad

silent pad cluster

brake pad assembly

silent pad cluster

caliper body

No. 2 lock plate of

brake pad

No. 1 lock plate of

brake pad

long sliding caliper liner

sliding sleeve dust cover

caliper body

rectangular sealing ring

piston

piston dust cover

piston dust cover

snapping spring

sliding sleeve dust cover

short sliding caliper liner

short sliding caliper sleeve

sliding sleeve dust cover

vent screw

vent screw dust cover

long sliding caliper sleeve

sliding sleeve dust cover

Dr

Braking System

 Front Brake (Dr)

BR-14

Brake pad change

Remark: Check the thickness of the friction material of brake

pad through the observation hole on caliper body after the

vehicle covers thirty thousand; if the thickness fails to fall

within the specified range, change is required. (If the brake is

used often, the thickness of friction materials of brake

pad is required to check whether it is within the specified

range after the vehicle covers more than ten thousand,

if not, change it.

1.

Tear down the front wheel;

2.

Check the thickness of friction material of brake pad:

Check the thickness of friction material of brake pad through

the observation hole on caliper body, if it fails to be within the

specified range, change it.

Min thickness: 2.0mm

3.

Raise the wheel-brake cylinder:

(a)

Tear down the short bolts of sliding sleeve;

(b)

Uplift the wheel brake pump and hang it with rope to

protect the brake oil pipe.

Remark: Do not loosen the brake oil pipe and the bleeding plug.

4.

Tear down the following parts:

(a)

Two braking pads;

(b)

Two silent pad clusters;

(c)

Four braking pad lock plates.

Braking System

 Front Brake (Dr)

BR-15

5.

Brake disc measurement

(See page BR-17)

6.

Measure the radial run-out of the brake disc;

(See BR-18)

7.

Mount the lock plate of brake pad.

8.

Mount the new brake pad.

(a)

Mount the silent pad cluster on brake pads of both the

inner and outer sides;

Remark: Pollution of oil stain or coat is not allowed on the

work faces of brake pad or brake disc.

(b)

Draw out a little brake liquid from the liquid container to

prevent the brake liquid overflowing from the liquid

container;

(c)

Press in the piston with the hammer lever or similar tool.

9.

Mount the wheel-brake cylinder;

Mount and screw up the hex bolts (the hex bolts shall be coated

with the thread locking sealing agents.

Fastening torque

(38-50)N
m

Remark: only one brake pad can be changed in one time so as

to prevent the piston of other wheel being shot out.

Braking System

 Front Brake (Dr)