Great Wall service chassis and body Manual - part 60

BR-36

7.

Tear down the toggle plate and the brake lever:

(a) Tear down the open retainer ring;

(b) Tear down the toggle plate;

(c)

Tear down the pin clip;

(d)

Tear down the brake lever.

8.

Tear down the wheel-brake cylinder:

(a)

Tear down the brake pipeline. And block the pipeline

with a clean cork.

(b)

Tear down the two bolts to take apart the wheel-brake

cylinder.

9.

Tear down the following parts:

(a)

Two dust covers;

(b)

Two pistons;

(c)

Two piston cups

(d)

Spring.

Braking System

 Rear Brake (SF)

BR-37

Check and Repair the Brake Parts

1.

Check the disassembled parts;

Check the disassembled parts to see whether there is abrasion,

rust or damage.

2.

Measure the inner diameter of the brake drum;

Inner diameter

295.0mm

Max diameter

297.0mm

3.

Measure the thickness of brake shoe liner;

Standard thickness

6.5mm

Min thickness

1.5mm

In case the thickness of brake shoe liner is less than the min

thickness or there is uneven abrasion, change the brake shoe.

Remark: if either brake shoe is required to change, all rear

brake shoes shall be changed to maintain the even braking

properties.

4.

Check the brake shoe liner and the brake drum to see

whether there is close contact;

If there is poor contact between the brake shoe liner or brake

drum, repair or change the brake shoe cluster with the grinding

devices.

Braking System

 Rear Brake (SF)

BR-38

Assembly of Rear Brake

left wheel

right wheel

forward

forward

1.

Assemble the wheel-brake cylinder:

(a)

Coat moderate lithium soap base glycol grease on the

piston cup.

(b)

Assembly the wheel-brake cylinder

Mount the two piston cups on two pistons

Mount the two dust cover on two pistons.

Encase the spring and the two pistons in the wheel

cylinder body.

Remark: assembly correctly according to the direction shown

in the drawing.

2. Mount the wheel-brake cylinder:

(a)

Mount the wheel-brake cylinder on the rear bottom plate

with two bolts.

Fastening torque

(6.5
10)N

m

(b)

Connect the brake pipeline on the wheel-brake cylinder.

Fastening torque

(18+2)N

m

3. Coat the lithium base grease on the following parts:

(a)

Hex convex platform where the bottom plate contacts

with the brake shoe.

(b)

Two ends of support brocks

(c)

Contact position where the piston and the shoe rib.

Remark: Do not pollute the friction pads.

Braking System

 Rear Brake (SF)

remark: assemble the component elements in the direction shown in the drawing;

BR-39

(c)

Self adjusting screw arbor thread;

(d)

Contact position where the self-adjusting screw sleeve

and the brake shoe.

4.

Mount the parking brake lever and the toggle plate

(a)

Mount the parking brake lever and lock it with a new pin.

(b)

Mount the toggle plate and a new open retainer ring.

5.

Mount the adjuster on the rear brake shoe:

(a)

Mount the adjuster;

(b)

Mount the clearance-adjusting spring;

6.

Mount the rear brake shoe:

(a)

Mount the brake bracing wire on the parking brake lever;

(b)

Mount the tension spring on the rear brake shoe;

(c)

Encase the rear brake shoe in such way that the end shoe

is inserted in the wheel-brake cylinder.

(d)

Mount the brake shoe pressure spring, pressure spring

cap and the claming pin.

Notice: Do not let the oil or lubricant touch the brake

shoe.

Braking System

 Rear Brake (SF)