4-139. Air Compressor Governor
a. Removal.
(1) Relieve pressure from the system.
(2) Remove air compressor governor
as
illustrated in figure 4-125.
Figure 4-125. Air compressor governor and alcohol
evaporator for, removal and installation.
Figure 4-126. Air compressor governor adjustment.
b. Cleaning aid Inspection.
(1) Clean and dry thoroughly.
c.
Cleaning and Inspection.
(2) Inspect for cracks or other defects. Replace
(1) Clean the alcohol evaporator with an
defective governor.
approved cleaning solvent.
c. Installation. Install governor as illustrated in
(2) Inspect strainer in the bottom of the body
near the mounting flange to be sure it is clean and free of
d. Adjustment. Adjust air compressor governor as
obstructions.
illustrated in figure 4-126.
(3) Inspect all connections and openings in body
to be sure they are free of obstructions.
4-140. Alcohol Evaporator
(4) Inspect for cracks or other damage.
a. General The alcohol evaporator permits
(5) Replace a damaged or defective alcohol
vaporized alcohol to be drawn into the air brake system
evaporator.
and thus guards against any possible interruption of
d. Installation. Install the alcohol evaporator as
braking service when a vehicle is operated in below
illustrated in figure 4-125.
freezing temperatures. The evaporator consists of a
e. Service. Fill reservoir two-thirds full of pure
support casting and a reservoir for methyl alcohol.
methyl 188 proof alcohol. Alcohol should be free of any
inhibitor.
b. Removal. Remove alcohol evaporator as illustrated
4-141. (Not Applicable)
4-142. Air Chamber
a. Removal
(1) Relieve air pressure from system.
(2) Remove air chamber as illustrated in figure
4-128.
Figure 4-127. Not used.
4-128
