Chevrolet 1956 Truck Operator's Manual page 52

and
2lh
ton models are equipped with a propeller shaft brake.
Th~
service brake system consists of the brake pedal, main
cylinder, brake lines to all wheels, wheel cylinders, shoes with
linings and brake drums. The parking brake on
lh
and
% ton
models with standard transmission consists of the brake lever,
pull rods, cables and the toggle at the wheels which actuates
the brake shoes.
The parking brake on 1 ton models and others with 3-speed
heavy duty, 4-speed, or automatic transmission consists of the
brake lever, bell cranks, pull rod, brake drum attached to the
transmission, and an external brake band.
Parking brake on
llh,
2 and
2lh
ton models consists of the
brake lever, bell cranks, pull rod, brake drum attached to the
transmission drive flange and internal and external brake
shoes. When equipped with optional transmission, these
models have the external band type propeller shaft brake.
The hydraulic system must be kept full of fluid at all times
in order to function properly. The main cylinder includes a res-
ervoir for a reserve supply of fluid. This automatically keeps
the system full of fluid as long as there is a reserve supply in
the reservoir. Should the reservoir become empty or the hy-
draulic system be opened at any point, air will enter the sys-
tem and affect the efficiency of the brakes. When this occurs
the hydraulic system must be bled. See "Bleeding Hydraulic
System."
Care. The Chevrolet braking system requires very little care;
however, the system should be
checked occasionally for indications
of fluid leak. If leaks are found the
necessary repairs should be made at
once.
The main cylinder inspection
plug in the left side of floor board
should be removed and the top of
main cylinder cleaned carefully (fig.
52). The filler cap should be re-
moved and if the fluid is low in
Fig.
52-Hydraulic Bralce
Main Cylinder Location
the reservoir, it should be filled to
a point about
lh"
from the top of reservoir with G. M. Super
No. 11 Hydraulic Brake fluid. Check the filler cap to see that
the vent holes are open. Install filler cap and inspection plug .
• 51 •