Main Cylinder For Drum Type Brakes - Exploded View - Chevrolet 1967 Chevelle Service Manual

BRAKES 5-19
correct service parts when servicing a Bendix main
cylinder.
1. The two-letter identification stamp on the end of
the master cylinder indicates the displacement capa-
bilities of that particular cylinder. Master cylinders
should only be replaced with another cylinder bearing
the same two-letter identification.
2. The length of the component pistons in the master
cylinders are critical factors in displacement capa-
bilities of a particular master cylinder. These
pistons are coded, using rings or grooves in the
shank of the piston. It is mandatory that when
pistons are replaced, the replacing piston must con-
tain the same identification marks and the same
contour at the push rod end as the piston which
is removed.
Delco Moraine dual master cylinders, used with
drum-type brakes, contain a rubber check valve and
check valve spring in each outlet boss. When the
car is equipped with disc brakes on the front and
drum brakes on the rear, the dual master cylinder
will have a check valve and spring in the outlet
boss for the rear brakes. No check valve is required
for four wheel disc brakes, and, therefore, the outlet
1. Spring
2. Check Valve
3. Valve Seat
4. Bleeder Valve
5. Bail Wire
6. Cover
7. Diaphragm
8. Stop Screw
9. Body
Fig. 32-Main Cylinder for Drum Type Brakes-Exploded View
10. Spring
11. Retainer
12. Seal
13. Seal Protector
14. Primary Piston
15. Seal
16. Seal
17. Piston Extension Screw
18. Secondary Piston Stop
19. Spring
20. Spring Retainer
21. Seal
22. Seal Protector
23. Secondary Piston
24. Seal
25. Retaining Ring
CHEVROLET CHASSIS SERVICE MANUAL