Chevrolet Light Duty Truck 1973 Service Manual page 321

Probable Cause
1. Gummy 1in in g .
2. T ir e tread s l i c k .
Probable Cause
1. Linin gs too s e n s it iv e to water.
2. D i r t y brakes.
3. Bent fla n g e p la te - opening.
4. Scored drums.
Probable Cause
1. Flange p la te bent or shoes tw is te d .
2. M e t a l lic p a r t i c le s or dust imbedded in l i n i n g .
3. L inin g r i v e t s loose or l i n i n g not held t i g h t l y
a g ainst the shoe a t the ends.
4. Drums not square or d i s t o r t e d .
5. Shoes scraping on fla n g e p la te ledges.
6. Weak or broken hold down s pring s .
7. Loose wheel be arings.
8. Loose fla n ge p la t e , anchor, drum wheel c y li n d e r .
9. Loose shoe 1 in k s .
10. Linin gs located wrong on shoes.
11. Brake drum s il e n c e r spring missing or too weak.
DIAGNOSIS—DRUM BRAKES
ONE WHEEL LOCKS
1. Replace the l i n i n g s .
2. Match up t i r e treads from side to sid e.
WET WEATHER: BRAKES GRAB OR W O N T HOLD
1. Replace the 1in in g s .
2. Clean.
3. S tra ig h te n .
4. Grind or tu rn in pa irs,
BRAKES SQUEAK
1.
2.
3.
5
.
g
9
11.
Remedy
Remedy
Rem edy
Stra ig h te n or replace damaged p a rts .
Sand the surfaces o f the l i n i n g s and drums.
p a r t i c le s o f metal t h a t may be found in the surface o f
the 1i ni ngs.
Replace r i v e t s an d/or tig h t e n l i n i n g by r e - r i v e t i n g .
Turn or grin d or replace drums.
Apply Delco Brake Lube #5450032 (or e q u iv a le n t) to
ledges. Replace w ith new shoe and l i n i n g s , i f d i s t o r t e d .
Replace d e f e c t iv e p a rts .
Tighten to proper s e t t i n g .
T ighten.
T ighten.
I n s t a l l l i n i n g s c o r r e c t l y .
I n s t a l l new s pring .
BRAKES 5 -5 5
Remove a l l
LIGHT DUTY TRUCK SERVICE MANUAL