TM 9-2330-271-14&P
e.
Installation.
(2) Disconnect two air tubes from air filter
fittings.
(1) Position air chamber mounting studs
(3) Remove two tube fittings from air filter.
through bracket. Secure with two lock washers and nuts.
(4) Remove two nuts and washers from U-bolt
(2) Connect air chamber-to-relay valve tube.
and remove U-bolt and filter.
(3) Close drain cock on air reservoir.
c. Installation.
(4) Add hydraulic fluid to master cylinder
(1) Position air filter on crossmember with
arrow on body of air filter pointing in direction of air flow.
(5) Bleed and adjust brakes (paragraphs 4-32
(2) Place U-bolt over air filter through holes in
crossmember and secure with two nuts and washers.
(3) Connect air tubes to air filter fittings.
4-40.
Air Filter (fig. 4-32)
(4) Connect intervehicular SERVICE and
EMERGENCY brake air hose couplings and close air
NOTE
reservoir drain cock.
Some semitrailers are not equipped
with air filters.
4-41.
Relay Valve (fig. 4-33)
a. Draining of Moisture. Remove drain plug from
bottom of relay valve (fig. 4-33) to drain accumulated
moisture. Replace plug after draining.
Figure 4-82. Air filter and air lines.
a.
Service.
(1) Disconnect intervehicular SERVICE and
EMERGENCY brake air hose couplings and open air
reservoir drain cock.
(2) Remove drain plug from bottom of air filter
to remove any water accumulation.
(3) To remove internal parts, hold filter body
with wrench, unscrew cover nut and remove gasket,
spring, washer and element.
Figure 4-33. Relay valve.
(4) Clean all metal parts, including body, and
b. Operating Test.
rinse element with approved cleaning solvent (paragraph
(1) With brake air system of semitrailer
connected and charged, check if brakes on wheels apply
(5) If unserviceable components are detected,
properly.
replace filter assembly.
(2) Release brakes and check whether air
(6) Assemble gasket, spring, washer and
pressure is being exhausted promptly.
element on cover nut, insert in air filter body and tighten
(3) With semitrailer chassis brake system fully
nut.
charged, close shutoff valve in emergency line tube on
b. Removal.
towing vehicle and disconnect
(1) Disconnect intervehicular SERVICE and
EMERGENCY brake air hose couplings and open air
reservoir drain cock.
4-47
