9-10
Chapter 9 Brakes
5.28 Leading/trailing shoe type drum
. . . . . .
Draxe - exploaea view
I Brake drum
2 Upper return spring and adjuster assembly
3 Lower return spring
4 Hold-down pins
5 Leading shoe
6 Parking brake cable
7 Vailing shoe and a@ster leverassembly
5.29 Use pliers or a special tool like
5.30 Rotate the leading shoe down and
this one to remove the
unhook the return spring
hold-down springs
23 Hook the adjuster cable into the hole on the auto adjuster lever. Place
the cable guide into position on the rear brake shoe and insert the shoe
end of the return spring into the hole in the shoe.
24 Lift up on the end of the auto adjuster lever and place the adjusting
ale eyelet over the brake shoe pivot at the top of the backing plate.
25 Place the end of the rear return spring over the pivot, then install the
forward return spring.
26 Double-check to make sure all the springs and cables are properly in-
stalled. Operate the adjuster mechanism by pulling the adjusting cable to-
ward the edge of the backing plate. The adjuster lever should ratchet over
the adjusting wheel and engage the next tooth when the cable is pulled.
27 Turn the brake adjuster star wheel by hand until the brake drum will
just fit over it, then install the drum. Install the wheels and lower the vehicle
to the ground.
Leading/trailing type
Referfoillusfrations5.28,5.29,5.30,5.3ia, 5.316,5.31~,5.36,5.38,5.39,
5.4Oa and 5.4Ob
28 Use pliers to detach the upper return spring (see
illustration).
5.31a Remove the trailing shoe
hold-down spring . . .
29 Remove the leading brake shoe hold-down spring and pin (see iiius-
tration).
This is accomplished by grasping the spring cup with a special
tool or a pair of pliers, pushing down and rotating it go-degrees, disengag-
ing it from the pin. Place a finger behind the pin to prevent it from being
pushed out.
30 Remove the leading brake shoe and disconnect the lower spring (tie
illustration).
31 Remove the trailing shoe hold-down spring and pin, remove the shoe,
disconnect the parking brake cable from the adjuster lever and remove the
shoe (see
illustrations).
~.
32 Detach the adjuster assembly from the shoe.
33 Check the wheel cylinders for signs of leaking fluid, replacing or i%
building them if necessary (see Section 6).
~__
34 Check the brake drum for hard spots, cracks, score marks and
grooves. Hard spots will appear as small discolored areas. If they can’t be
removed with emery cloth or if any of the other conditions listed above ex-
ist, the drum must be taken to an automotive machine shop to hav& it
turned (machined onalathe).
Note:
frofessionalmechanicsrecommend
resurfacing the drums whenever a brake job is petformed. Resurfacing
will eliminate the possibility of out-of-round drums.
To Next Page
Loading...
