9-8 Chapter 9 Brakes
5.4a Duo-servo type drum brake-exploded view
7 Anti-rattle spring
12
Cable guide 17 Adjuster assembly
8 Parking brake strut
13 Hold-down cup
18 Secondary shoe -
9 Parking brake lever
14
Hold-down spring 7 9 Adjuster spring
10 Shoe return spring 15 Primary shoe 24 Auto a@@er lever
11 Adjuster cable 16 Aqus ter spring
21
Whedc);lnder repair kit.
1
Bicking plate
2 Wheel cylinder
boot
3 Wheel cylinder
piston
4~ Wheefcytnder cup
5 Wheel cylinder
6 Hold-down pin
5.4b Use pliers or a special tool to
disengage the rear return spring
from the pivot
5.46 Remove the forward spring with Ma Remove the adjuster cable from
adjustable pliers the pivot
listedabove exist, the drum must be taken to an automotive machine shop
to have it turned (machined on a lathe). Note: Professional mechanics
recommend resurfacing the drums whenever a brake job is performed.
Resurfacing will eliminate the possibility of out-of-round drums.
15 Inspect the backing plate ledges for grooves
(see illustration).
If the
grooves are not too deep, they can be removed by filing or sanding the
backing plate. If the grooves are too deep, the backing plate must be re-
placed or the brake shoes will hang up in the grooves.
16 Check the free length of the primary (green) and secondary (grey)
brake shoe return springs
(see illustration)
and compare this measure-
mentto theone in theSpec,ificationsSection atthe beginning of this Chap-
ter. Replace any springs that are stretched with new ones.
17 Install the adjuster spring and lever onto the rear brake shoe.
18 Place the parking brake strut into position with the spring on the fliF
ward
end
(see illustration).
Note that the parking brake struts will be
stamped ‘I?’ for the right side of the vehicle and ‘C for the left side of the
vehicle.
19 Install fever into the hole at the top of the rear brake
shoe. Slip t and a new retaining clip onto the pivot. Bend
the ends of the 36 with p@rs so the clip fits tightly on the pivot. ’
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