53
53
1.
1. Spring
Spring
8.
8. Return
Return spring
spring
15.
15. Spr
Spring
ing pull
pull rod
rod
2.
2. Cup
Cup
9.
9. Adjusting
Adjusting lever
lever
16.
16. Parking
Parking pull
pull rod
rod
3.
3. Piston
Piston
10. Second
10. Secondary
ary brake
brake shoe
shoe 17.
17. Parking
Parking push
push rod
rod
4.
4. Cylinder
Cylinder body
body
1
11.
1. Clearance
Clearance adjuster
adjuster
18.
18. Operating
Operating cylinder
cylinder
5.
5. Push
Push rod,
rod, piston
piston 12.
12. Spring
Spring
19.
19. Return
Return spring
spring
6.
6. Return
Return spring
spring
13.
13. Parking
Parking cable
cable assy
assy
20.
20. Primary
Primary brake
brake unit
unit
7.
7. Push
Push rod
rod
14.
14. Spring
Spring cover
cover
▲Clearance self
▲Clearance self
-adjuster
-adjuster
The clearance self-adjuster keeps suitable clearance automatically between friction
The clearance self-adjuster keeps suitable clearance automatically between friction
pieces and brake drum, it actuates only when the truck in reverse travel is braked. The
pieces and brake drum, it actuates only when the truck in reverse travel is braked. The
secondary brake shoe comes into contact with the brake drum
secondary brake shoe comes into contact with the brake drum and rotates together
and rotates together. As a
. As a
result of this, the parking pull rod turns right around the point A so that the point B of the
result of this, the parking pull rod turns right around the point A so that the point B of the
rod raises. After release the brake pedal, the parking pull rod turns left with the spring
rod raises. After release the brake pedal, the parking pull rod turns left with the spring
force so that the point B of the rod lowers. (Fig4.3)
force so that the point B of the rod lowers. (Fig4.3)
As
As the
the clearance
clearance between
between the
the friction
friction pieces
pieces and
and the
the brake
brake drum
drum increases,
increases, the
the
rotating vertical distance of the pawl by point B increases, too. When the clearance is
rotating vertical distance of the pawl by point B increases, too. When the clearance is
more than 0.4mm, the adjuster is dialed a tooth and the adjusting lever becomes longer,
more than 0.4mm, the adjuster is dialed a tooth and the adjusting lever becomes longer,
so that the clearance decreases.
so that the clearance decreases.
Clearance adjusting range: Within 0.4 to 0.45mm.
Clearance adjusting range: Within 0.4 to 0.45mm.
Fig4.3 Clearance self-adjuster
Fig4.3 Clearance self-adjuster
4.4 Operating device of
4.4 Operating device of parking brake
parking brake
The parking brake is of a lever type. Open the second cap on the right of the meter
The parking brake is of a lever type. Open the second cap on the right of the meter
bracket covering, the brake force can be adjusted with the
bracket covering, the brake force can be adjusted with the parallel-driver
parallel-driver..
Brake force adjustment:
Brake force adjustment:
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