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
(6.510)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)
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