Chevrolet 10 Series 1968, Service Manual, Page: 293 / 713

BRAKES 5-50
Figure 77 shows two pieces of tubing— one with a
single-lap flare
“ A ”
and the other with a double-lap
flare “ B” . It will be noted that the single-lap flare splits
the tubing while the double-lap flare shown in “ B” is a
heavy, well-formed joint.
The following procedure should be followed in making
up hydraulic brake pipes:
1. Cut the tubing to the desired length, using Tool
J-8000. Square off ends of tube and ream sharp
edges with reamer tool provided on the tube cutter.
2. Install compression couplings on tubing and dip end
of tubing to be flared in hydraulic brake fluid. This
lubrication results in better formation of the flare.
3. Select the correct size upset flare punch. One end
of this punch is hollowed out to gauge the amount of
tubing necessary to form a double-lap flare.
4. Slip the punch into the tool body with the gauge end
toward the die blocks, install the ram and tap lightly
until the punch meets the die blocks and they are
forced securely against the stop plate (fig. 78).
5. Draw latch plate nuts down tight to prevent tube from
slipping. Draw nuts down alternately beginning with
nut on closed side to prevent distortion of plate.
6. Remove punch and ram. Reverse punch and place
back in tool body. Install ram and tap lightly until
face of punch contacts face of die blocks to complete
first flare operation (fig. 79).
7. Remove ram and punch.
8. Insert finish flare and ram in tool body and tap ram
until a good seat is formed (fig. 80).
9. Blow tubing out with compressed air.
BENDIX POWER BRAKES
F ig . 81—Bendix Power Brake U n it—Sin g le Diaphragm Type
1. Main C y lin d e r
2. Vacuum C h eck V a lv e
3. Grommet
4. Diaphragm
5. Diaphragm Plate
6. Rear Shell
7. Diaphragm Spring
8. Reaction Plate
9. Plunger
10. Bearing Seal
11. Poppet V a lv e
12. Poppet V a lv e Spring
13. Poppet Retainer
14. Retainer
14. Dust Boot
15. V a lv e Push Rod
16. Filte r and Silencers
17. V a lv e Return Spring
18. Mounting Stud
19. A ir V a lv e Lock Plate
20. Diaphragm Lip
21. Front Shell
22. Push Rod Seal
23. C y lin d e r-to -S h e lI Seal
24. H yd rau lic Push Rod
25. Adjusting Screw
CHEVROLET TRUCK SERVICE MANUAL