TM 5-3810-288-12
b. Valves, Hoses, and Fittings. Refer to figure 7-40
and remove and install a defective valve, hose, or fitting.
No repair is possible for hoses or fittings, except those
described under Field Expedient Repairs, paragraph 7-
c. Front Brake Chambers.
wheel brake chamber.
wheel brake chamber.
d. Rear Brake Chambers.
wheel brake chamber.
wheel brake chamber.
e. Alcohol Evaporator.
(1) General. The purpose of the alcohol evaporator is
to permit vaporized alcohol to be drawn into the air
brake piping. This vapor pre-vents any possibility of
loss of braking action due to freezing of water vapor
in the system components. The device consists of a
casting which forms a support for the reservoir, as
shown in figure 7-43. Ordinary methyl alcohol is
used in the system. In operation, the compressor
maintains a partial vacuum in the compressor intake
manifold, and the line from the alcohol evaporator to
the intake manifold also has a partial vacuum. This
vacuum is the reason alcohol vapors enters the
system.
remove the nuts and lockwashers which secure the
evaporator cap. Unscrew the cap from the reservoir
to disassemble.
(3) Repair. To determine if the evaporator is operating
properly. start the carrier engine and check to see if
air bubbles pass through the alcohol in the reservoir.
If bubbles are seen passing through the reservoir,
the evaporator is operating properly. If no bubbles
are present, remove the alcohol evaporator as
previously instructed in this paragraph. Then, repair
the alcohol evaporator as follows:
(a) Remove the strainer in the evaporator cap and
clean thoroughly, using a suitable solvent.
(b) Replace the filler cap gasket and the cap gasket.
(c) Check to see that both lines to the evaporator
are tight at the end where they are
Figure 7-41. Front wheel brake chamber, removal and
replacement.
7-48
