TM 9-2330-388-14
(5) Remove upper and lower trunnion hub and
(4) Tighten two trunnion hanger capscrews and
trunnion tube.
nuts.
(6) Remove rubber
bushing
and
trunnion
(5) Repeat steps (2) through (4) for opposite
washer from trunnion tube.
side.
(7) Loosen two trunnion hanger capscrews and
(6) Install both axles, para 5-9.
nuts, and slide hanger off trunnion tube.
(7) Install wheels on both axles, para 4-51.
(8) Repeat steps (1) through (7) for opposite
side.
(8) Remove supports and jacks, and lower rear
end of semitrailer to ground.
c.
Assembly
5-9.
Axle
(1) Slide trunnion hanger onto trunnion tube.
Do not tighten trunnion hanger capscrews and nuts at
a.
Removal, Fig. 5-4.
this time.
(1) Position semitrailer on hard level surface
(2) Slide trunnion washer and rubber bushing
with front resting on landing gear.
onto trunnion tube.
WARNING
(3) Install the upper and lower trunnion hub on
Release air pressure from both air reservoirs
the trunnion tube.
before doing any work on brake lines or
other pressurized air lines.
(4) Using lifting device, position spring on upper
trunnion hub so that center bolt of spring is in recess of
(2) Release air from both air reservoir by
trunnion hub.
opening drain cocks on bottom of reservoirs, fig. 4-54.
(5) Put wear plate in position on the spring.
(3) Loosen wheel nuts while wheels are on
The nut on the center bolt of the spring fits into hole in
ground.
the wear plate.
(4) Position jacks just inboard of the spring end
(6) Install two U-bolts over wear plate and
up on axle. Jack up axle to be removed until wheels
through holes in upper and lower trunnion hubs.
clear the ground.
(7) Install four washers and four nuts on U-
(5) Remove wheels, para 4-51.
bolts, and tighten evenly to 200-320 lb.-ft.
(6) Raise rear of semitrailer with an overhead
(8) Repeat steps (1) through (7) for opposite
crane or A-frame support until weight of springs has
side.
been removed from axle. Block frame securely, fig. 5-4.
d.
Installation.
(7) Remove brake air chambers, para 4-42.
(1) Place a jack under trunnion tube close to
(8) Remove four nuts, four washers, and four
inside of each trunnion hanger, and slowly raise
bolts which fasten the spring end cap to spring seat on
suspension into position under trunnion support
axle.
brackets.
(9) Remove four nuts, four washers, and two
(2) Aline holes in the trunnion hanger with
U-bolts which fasten the spring seat on axle to the spring
holes in the mounting bracket.
end cap.
(3) Install four bolts, four washers, and four
(10) Remove leaf spring seats.
nuts. The nuts are tightened, jack up the suspension to
seat the trunnion hanger. Tighten nuts evenly to 90 lb ft.
(11) Remove cushioning pads.
(12) Remove adjustment plates.
5-13