Parking brake--Parking brake assembly

Parking brake assembly

Overhaul

Hint: overhaul process for right side is same as the left

side.

1. Disassemble left rear wheel.

2. Disassemble left rear brake branch pump bracket

assembly.

3. Disassemble left rear brake.

Hint:

z

Make mark on disk and shaft hub.

z

If disk is not easy to disassemble, adjust shoe until

wheel could rotate freely.

4. Check the inner diameter of brake drum.

Use centimeter or other measures with same grade to mea-

sure inner diameter of brake drum.

Standard inner diameter: 173mm

Maximal inner diameter: 174mm

5. Disassemble support lever of parking brake shoe

(LH).

(a) Use needle-nosed pliers  to disassemble two springs on

upside of shoe.

(b) Disassemble support lever of parking brake shoe.

6. Disassemble parking brake shoe adjustor.

(a) Use needle-nosed pliers to disassemble return spring.

(b) Disassemble left parking brake shoe adjustor.

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Parking brake--Parking brake assembly

7. Disassemble parking brake shoe assembly (LH).

Use special tool to disassemble parking brake shoe, localiz-

ing spring, pin and brake exterior shoe.

8. Disassemble parking brake shoe assembly (LH).

(a) Use special tool to disassemble parking brake shoe, localiz-

ing spring, pin and brake inner shoe.

(b) Disassemble parking brake lever, then disassemble parking

brake inner shoe.

9. Check the thickness of  friction plate of parking

brake shoe

Use ruler to measure the thickness of friction plate of shoe.

Standard thickness: 3.5mm

Maximal thickness: 1.0mm

10. Check whether the contact between brake drum and

friction plate of parking brake shoe is applicable.

Spread chalk on inner diameter of brake drum, then mesh it

with shoe friction plate. If the contact between brake shoe and

brake drum is not applicable, use brake drum to abrade and

repair shoe or change brake shoe assembly.

11. Disassemble lever of parking brake shoe (LH).

Use needle-nosed pliers to disassemble parking brake pull cable,

then disassemble lever of parking brake shoe.

12. Spread high temperature lubricating grease.

Spread high temperature lubricating grease on brake back

board of contacting part of shoe.

13. Assemble parking drag lever (LH).

Use needle-nosed pliers to connect parking brake pull cable to

lever of left parking brake shoe.

14. Assemble parking brake inner shoe assembly (LH).

(a) Spread high temperature lubricating grease on contacting

part between parking brake shoe and  lever.

(b) Use special tool to assemble parking brake shoe with park-

ing shoe, localizing spring and pin.

Special

tool

Special

tool

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Special tool

15. Assemble parking brake exterior shoe assembly

(LH).

Use special tool to assemble parking brake shoe with parking

shoe, localizing spring and pin.

16. Assemble parking brake shoe adjustor.

(a) Spread high temperature lubricating grease on adjusting

bolt.

(b) Assemble parking brake shoe adjustor.

(c) Use needle-nosed pliers to assemble return spring.

17. Assemble support lever of parking brake shoe (LH).

(a) Spread high temperature lubricating grease on contacting

surface between shoe support lever and tension spring.

(b) Assemble support lever of parking brake shoe.

(c) Use needle-nosed pliers  to assemble upper two tension

springs.

Parking brake--Parking brake assembly

Special

tool

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18. Check the assembly of parking brake system.

Check every part after assembly.

Note: do not attach oil dirt or lubricating grease on contacting surface between shoe friction

sheet and brake drum.

Parking brake--Parking brake assembly

19. Assemble the brake

20. Adjust the clearance of parking brake shoe.

(a) Lock screw cap of shaft hub temporarily.

(b) Disassemble hole plug, then use screw driver to turn the

adjustor until brake drum is locked by shoe.

(c) Return the adjustor for 8 gears.

(d) Check whether shoe has lag.

(e) Assemble hole plug.

21. Assemble rear disk type brake branch pump assem-

bly (LH).

22. Assemble rear wheels.

Torque: 103 

±±±±± 10N⋅⋅⋅⋅⋅m

23. Check the travel of parking brake drag lever.

24. Adjust the travel of parking brake drag lever.

Left

Right

Front

Front

Increase the

clearance

Decrease the

clearance

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