Brake Drums - Chevrolet LIGHT DUTY TRUCK (SERIES 10-35) Service Manual

5-40 BRAKES
A N C H O R
PIN
H O L D
D O W N
PIN
B A C K IN G
PLA TE
1. Place the flange plate in position on the rear bearing
retainer and fasten with four bolts. Torque bolts to 24 foot
pounds.
2. Install transmission output flange on spline of
mainshaft and fasten with flange nut. Torque nut to 100 ft.
lbs.
3. Install cable assembly from back of flange plate.
Push retainer through hole in flange plate until tangs
securely grip the inner side of the plate.
4. Place washer and reinforcement over the threaded
end of anchor pin. Hold anchor pin nut (flat side against
flange on flange plate) in position behind flange plate and
insert threaded end of anchor pin from front side. Thread
the anchor pin into nut and tighten securely (140 foot
pounds torque). Bend tang of washer over reinforcement
and side of washer over hex of anchor pin.
5. Install lever on cable by compressing spring and
inserting cable in channel of lever. Release spring.
. Install primary shoe (short lining) to lever as follows:
6
Place pin in lever, place washer on pin and push pin through
hole in primary shoe. Fasten parts together by installing the
clip in groove of pin.
7. Fasten two brake shoes and linings together by
installing connecting spring. Move the shoes toward each
other and install adjusting screw.
8 . Lubricate the flange plate contact surfaces with a
very light coat of Delco Brake Lube (or equivalent).
9. Place shoe and linings in position on flange plate.
When facing the brake assembly, the shoe with the
short lining should be to the left with the lever assembled
to it (automatic transmission), to the right (manual
LIG H T T R U C K SER V IC E M ANUAL
W A V E
W A S H E R
B R A K E L O C K
L E V E R W A S H E R
S H O E
W A S H E R
\ S O C K E T
A D JU S T IN G S C R E W
B R A K E
C A B L E
Fig. 5-47--P ropshaft Parking Brake Com ponents
R ET U R N
S P R IN G S
F L A N G E
STRU T
G U ID E
STRU T PLA T E
S P R IN G
H O L D D O W N
S P R IN G
W A S H E R , S P R IN G , C U P
transmission).
10. Pull brake shoes apart and install strut lever and
spring between them. The loop on the strut spring should
be in the "up" position.
11. Install hold down pins, washers, springs and cups
from flange plate to shoes.
12. Place guide plate on anchor pin.
13. Install pull back springs.
14. Remove the "knock out" plug (if necessary) and
install a new metal plug in the brake drum adjusting hole.
15. Install the brake drum.
16. Install the propeller shaft.

BRAKE DRUMS

Inspection and Reconditioning
CAUTION: See "Caution" on Page 1 of
this section.
Whenever brake drums are removed, they should be
thoroughly cleaned and inspected for cracks, scores, deep
grooves and out-of-round.
Cracked, Scored, or Grooved Drum
A cracked drum is unsafe for further service and must
be replaced. Do not attempt to weld a cracked drum.
Smooth up any slight scores. Heavy or extensive
scoring will cause excessive brake lining wear, and it will
probably be necessary to rebore in order to true up the
braking surface.
If the brake linings are slightly worn and the drum is
D R U M