Chevrolet 30 Series 1967 Service Manual page 242

BRAKES 5-26
2. Remove both brake shoe return springs, using Tool
J-22348.
3. Remove C-washer and flat washer from adjusting
cam and hold-down stud. Lift shoes off backing
plate.
4. Clean all dirt out of brake drum. Inspect drum for
roughness, scoring, or out-of-round. Replace or
recondition brake drum as necessary.
5. Inspect wheel bearings and oil seals as outlined in
Section 3.
. Check flange plate attaching bolts to make sure they
6
are tight. Clean all dirt off flange plate.
7. Inspect brake shoe
cracked, or weakened, replace with new springs.
. Check cam and shoe guide stud and friction spring on
8
flange plate for corrosion or binding. Cam stud
should turn easily with an eight inch wrench, but
should not be loose. If frozen, lubricate with kero­
sene or penetrating oil and work free.
9. Examine brake shoe linings for wear. Linings should
be replaced if worn down close to rivet heads. Refer
to " Brake Shoe Relining" in this section.
Installation (Figs. 49 and 50)
1. Install anti-rattle spring washer on each cam and
shoe guide stud, pronged side facing adjusting cam.
.
2
Place shoe assembly on backing plate with cam and
shoe guide stud inserted through hole in shoe web;
locate shoe toe in wheel cylinder piston shoe guide
and position shoe heel in slot in anchor block.
3.
Install flat washer and C-washer on cam and shoe
guide stud. Crimp ends of C-washer together.
4.
After installing both shoes, install brake shoe return
springs. To install each spring, place spring end
with short hook in toe of shoe, then using Tool
J-22348, stretch spring and secure long hook end in
heel of opposite shoe.
5. Install hub and brake drum assembly.
.
6
Adjust brake as directed under " Brake Adjustments"
in " Maintenance and Adjustments."
60 Series—Rear
(Wagner Type " FR-3" )
Removal (Figs. 51 and 52)
1. Jack up axle and remove hub and brake drum assem­
bly as directed in Section 3.
2. Install wheel cylinder clamps to hold pistons in
cylinders.
3. Using Tool J-8049,
springs.
4. Remove lock wires, nuts, and washers from brake
s h o e guide bolts,
assemblies.
5. Remove screws attaching
springs to anchor supports. Thread each adjusting
screw from the shoe side of its anchor support by
turning adjusting wheels, then lift adjusting wheels
out of slots in anchor supports.
. Clean all dirt out of brake drum. Inspect drum for
6
roughness, scoring, or out-of-round.
7. Recondition or replace drum as necessary. Inspect
brake flange plate for oil leakage past axle shaft oil
seal. Install new seals if necessary.
. Clean all dirt out of anchor pin holes and adjusting
8
screw openings in anchor supports.
return springs. If broken,
remove brake shoe return
then r e m o v e brake shoe
adjusting wheel lock
Fig. 51—Wagner Type " FR-3"
1. W h eel C ylin d er Heat Shield
2. Upper W h eel C ylin d er
3. Anchor Pin
4. Return Spring (Short)
5. G u id e Washer
6. G u id e Bolt
7. G u id e Bolt N u t Lock W ire
9. Inspect wheel bearings and oil seals as directed in
Section 3.
10. Inspect brake shoe
cracked, or weakened, replace with new springs.
11. Inspect threads on adjusting screws and in adjusting
wheels for wear or damage. Replace as necessary.
12. Examine brake shoe linings for wear. Linings should
be replaced if worn down close to rivet heads. Refer
to Brake Shoe Relining in this section.
Installation (Figs. 51 and 52)
1. Install adjusting screws and wheels in anchor sup­
ports dry; use no lubricant. Insert each adjusting
wheel in slot in anchor support, insert threaded end
of adjusting screw in anchor support, then turn
adjusting wheel to thread adjusting screw into anchor
support.
.
2 Install brake shoes with cut-away end of shoe web
next to adjusting screw and with ends of shoes en­
gaging slots in wheel cylinder push rods. Install flat
washer and nut on each brake shoe guide bolt.
Tighten nuts finger-tight, then back off one full turn
and install lock wires.
3. Install brake shoe return springs, hooking one end of
each spring (short hook) in brake shoe web, then hook
other end over anchor pins with Tool J-8049.
4. Remove wheel cylinder clamps.
5. Install hub and brake drum assembly as directed in
Section 3.
.
Adjust brakes as previously directed under Brake
6
Adjustments under Maintenance and Adjustments.
Rear Brakes
8. Brake Shoe and Lining
Assembly
9. Return Spring (Long)
10. Adjusting W h e e l Lock Spring
11. Adjusting W h eel
12. Lower W h e e l C y lin d e r
13. Backing Plate
return springs. If broken,
CHEVROLET TRUCK SERVICE MANUAL