Chevrolet Light - Page 57

Ffg.S3-PropelierSho"Broh
drum of .010"-.015" measured
at a point directly above bolt
"A". Then hold bolt and
tighten lock nut securely.
3. Loosen lock nut "C"
and draw up nut "B " to se-
cure .010"-.015" clearance be-
tween inner shoe facing and
brake drum. Then hold nut
"B " and tighten lock nut "C"
securely.
4. Recheck both facing-
to-drum clearances.
Brake Pedal Clearance. Should be checked and adju s ted as
fQllows, when necessary.
1. Brake pedal should be adjusted to give 1 ~6 " cleararn::e
between top of pedal arm and underside of brake pedal toe pan
depression.
2. Loosen check nut "C" (fig. (4) at rear of clevis on main
cylinder push rod "D".
3. Turn main cylinder push rod "D" by knurled portion
a head of boot, in the proper direction, to secure de s ired clear-
ance.
4. Tighten check nut "C" against the clevis.
Hydrovac Power Brakes
Description . The Hydrovac is standard equipment on the 2-ton
,- ________ --, :: i~V:I:n a~~~:~:e :~d:
tional equipment on % and 1
ton and 111'2 ton regular mod-
els. This self-contained unit is
connected in the hydraulic
brake system betwe en the
brake main cylinder and the
lines leading to the wheel
cylinder s.
The Hydrovac (fig. 54)
'-- ---=- -----' consists of three operating
Fig.S4-Hycl,ovo(
units built into one assembly;
'55'