Chevrolet Light Operator's Manual page 51

a point about
1f4"
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.
Bleeding Hydraulic System
Only G. M. Hydraulic Brake Fluid Super No. 11 should be
used when bleeding brakes. This brake fluid
is
satisfactory for
any atmospheric temperature, hot or cold, and has all the
qualities necessary for satisfactory operation, such as a high
boiling point
to
prevent evaporation and tendency to vapor lock
and still remain fluid at low temperatures.
The hydraulic brake system must be bled whenever a pipe
line has been disconnected, when a leak has allowed air to
enter the system or at any time the system has been opened.
For satisfactory brake operation the system must be completely
free of all air.
Bleeding, which may be accomplished by one of two methods;
Pressure or Manual, on all models except
Ilh and 2
ton, should
be
done on the longest line first, the proper sequence being left
rear, left front, right rear and right front.
Pressure Bleeding (Except 1% and 2 Ton)
1.
Clean all dirt from top of main cylinder and remove filler
plug.
2. Connect hose from bleeder
tank
to main cylinder filler
plug opening
~d
open valves at both ends of hose.
NOTE: Make sure fluid in tank is up to petcock above outlet and
that tank
i~
charged with 20 pounds air pressure.
3. Remove bleeder valve screw and screw bleeder hose into
bleeder valve, placing other end of hose in a container having
sufficient fluid to cover end of hose.
4. Open bleeder valve by turning % turn in a counterclock-
wise direction and watch flow of fluid at end of bleeder hose.
5. Close bleeder valve tightly as soon as bubbles stop and
fluid flows in a solid stream.
6. Remove bleede' r hose and install bleeder valve screw in
bleeder valve.
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