TM 5-3810-307-24-1-2
Air Governor: The air governor provides the signal to
actuate and terminate compressor pumping cycles.
The governor mounts on the compressor governor mount-
ing pad. If not, and remote mounting is required, locate the
governor as close as possible to the compressor. Using a
signal line between the governor and the compressor
exceeding 1.06 m [3.5 feet] is not recommended and can
result in unloader actuation problems.
Avoid mounting the governor in high heat areas of the
engine. Rubber seals in the governor can deteriorate and
cause failures under high temperature exposure. Envi-
ronmental temperatures exceeding 93C [200F] must be
avoided.
Air Dryers: Air dryers are recommended for all vehicle air
brake systems. The primary function of the air dryer is
moisture removal to prevent downstream freeze-ups and
corrosion of air lines, air tanks, and valving components.
The air dryer also functions as oil and air contamination
removal system, which helps provide improved system
performance and longer service life.
Consult the manufacturer for optimum air dryer installation
requirements.
Alcohol Additive Devices: The manufacturer does not
recommend alcohol injectors and evaporators. Typically,
these devices use a wide variety of alcohol mixtures which
can cause negative reactions with downstream
components, and shorten system life.
Use of an evaporator system with turbocharged compres-
sor inlet air can require an additional valve to prevent
siphoning the alcohol into the compressor air intake and
subsequently into the engine.
Use of an injector system adds inherent restrictions in the
compressor discharge line, potentially increasing build-up
times and carbon formation problems.
Air Tanks: Air tanks provide the vehicle with an air stor-
age reservoir area for braking needs. As a minimum, a
service and emergency air reservoir tank are required. A
third tank is also provided and acts as a reservoir wet tank
where moisture and other system contaminates condense
during the air cooling process downstream of the com-
pressor.
NOTE
To
obtain
optimum
air
system
performance, all air reservoir tanks must
be purged daily to prevent excess ac-
cumulation of contaminate material and
reduced air storage volume.
