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 frame beam, to a threaded opening near the bottom of' the
emergency relay valve.
It transmits compressed air to fill the
semitrailer
reservoir
and
to
maintain
the
proper
air
pressure.
emergency relay
valve,
to
apply
the
under
the
control
of
the
brakes of the semitrailer.
Air filters (figs. 10 and 11) are connected
f.
Air Filters.
lines
and
are
secured
to
into the service and emergency air
chassis frame cross members by U-bolts. Their purpose is to
remove
any
mousture)
or
foreign
matter
from
the
air
passing
The air filters are fitted with removable ele-
through them.
ments, held in Place by spring washers and springs. The filter
element is removed by unscrewring the nut at the base of the
cleaner body. The nut is fitted with a plug which is removed
to
drain
accumulations
of
moisture.
The air reservoir
and
13)
is
a
(g. Air
Reservoir.
metal tank mounted on brackets attached to the chassis frame
b e t w e e n t h e ) s u s p e n s i o n mounting
brackets.
It
is
connected
by
The
reservoir
provides
a
a tube to the emergency relay valve.
It is
supply of air. on the semitrailer for applying the brakes.
equipped
with
a
drain
cock
for
draining
accumulations
of
mois-
for r e l e a s i n g a i r p r e s s u r e i n
the semitrailer brake
ture
and
TAGO 1321B
24
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