DongFeng DFA1063DJ10-301, Руководство по обслуживанию

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Brake System
BR-8
Rear Brake
Disassembly
After remove the rear axle half axle, take down the brake drum and wheel hub assembly, then dismount rear
brake adjust arm, brake cam, air chamber bracket, brake shoe with bottom plate assembly, and dust shield in
sequence.
Check
1.Make sure whether the brake drum is damaged or distorted, replace if necessary.
2.Make sure whether the brake shoe with linings is cracked, replace if necessary.
3.Check the roller surface for any cracks and damages, replace if necessary.
4.Check the return springs.
Note:
After replace the friction plate, the excircle of the friction plate needs to be wholly machined. That is to
install the brake shoe and brake bottom plate together, and make use of the bottom plate to position to machine the
excircle of the friction plate.
Assembly
1.Install the brake to the bottom plate, screw on the screw and fasten with steel wire, then machine the excircle of
the brake shoe friction plate.
2.Install the brake shoe and brake bottom plate to the two ends of the rear axle housing, the tightening torque of
the bolt is 130~160N.m, and then install the pressing dust shield.
3.Install the air chamber bracket and fasten, then set to the brake cam and assemble the adjusting spacer. After
that, install the brake adjust arm to the brake cam and lock with a clamp ring, connecting the air chamber push
rod to the brake adjust arm with flat pin.
4.The return spring is hooked between two brake shoes.
Adjust
Disassemble the rubber dust shield of the inspection hole
and the adjust arm. Make use of a double offset ring
spanner to press the lock bush of the worn shaft head,
turn the worm shaft to let the friction plate surface and
inner surface of brake drum contact, then turn worm
shaft loose for 1/2~2/3 circle. At this time, the clearance
between center of two brake shoe friction wafers and
brake drum is about 0.7mm, and the brake drum can turn
freely without interfere with other parts.
After air entered the chamber, the push rod must be out
immediately, and after exhaust, it can return without block. The travel of the air chamber push rod is between 25
± 5mm.
Lubricate
1.Brake shoe roller shaft
2.Roller hole
3.Roller surface
4.Other parts refer to the front brake