Brake System
BR-6
Front Brake
Disassembly
Remove the brake drum and wheel hub assembly, take down the return spring, brake shoe, brake cam, air chamber
bracket and brake bottom plate in sequence.
Check
1.Make sure whether the brake drum is damaged or distorted, replace in necessary.
2.When the brake drum is worn out and becomes out of round, it is allowed to bore, but the accumulative machin-
ing quantity should not exceed 4mm for the diameter direction.
3.When the brake drum assembly has been bored:
The run-out of the drum inside surface to the bearing axis (mm) <0.25
The difference of the inside diameters of left and right drums on one vehicle (mm) <1mm
4.The wear allowance of the lining thickness is 7mm. The distance from the lining surface to the rivet head should
not be less than 1mm. The lining surface should not be cracked and broken away. Otherwise, it should be
replaced.
5.The wear allowance of the shoe flat face at one end should not exceed 0.30mm.
6.Check carefully. There should not be any crack (especially at the two end hooks).
7.The diaphragm of the brake chamber should be in good condition. It should not have any ageing crazing or
crack. It is not allowed to use the same size diaphragms of different hardness on one truck.
8.Check clearance of all fitting surface.
Assembly
1.Install the assembled brake backing plate assembly on the front axle steering knuckle.
Tighten bolts with the specified torque 160~220N
·
m
2.Put the tightening bolts with the locking wires into the holes around the brake camshaft seat from the inside.
Install anchor pin into its seating holes and make two eccentric journals of the anchor pins opposite each other.
3.Assemble brake chamber brackets (with brake chamber assembly) in turn and tighten them. Put in the brake
camshaft and the adjusting washer. Then assemble the front brake slack adjuster on the brake camshaft and lock
it with the cotter pin. The brake air chamber push rod will be connected with the brake adjust arm by a pin.
4.Fit the brake shoes inside the brake backing plate. At anchor pin ends lock brake shoes with lock plate and cot-
ter pins.
5.The return spring is hooked between two brake shoes.
Содержание DFA1063DJ10-301
Страница 1: ...DONGFENG DFA1063DJ10 14 301 303 SERVICE MANUAL DONGFENG AUTOMOBILE CO LTD September 2006 ...
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