TM 9-2330-294-14
be removed as a unit for ease of repair, however,
makes connecting and disconnecting shells easier.
individual components may be removed as detailed
Connect all electrical and ground connections. Turn
screws out of pads, install wiring harness into
b. Removal (fig. 5-4 and
5-5).
clamps and secure clamps, using screw and lock-
washer to each securing point. Install grommet at
each harness transit hole.
remove two air hoses from each axle.
NOTE
b. Circuit Breaker. Remove and install circuit
breaker in accordance with procedures in paragraph
removed from axle number 2. Axle number 1
4-16.
has identical air hoses to be removed. It is
c. Intervehicular Receptacle Cover. Remove and
not necessary to remove any other air lines
install intervehicular receptacle cover in accordance
when removing the front bogie.
d. Utility Outlet. Remove and install utility
(2) Remove nut, two flat washers, bolt and two
adapters that secure torque rod to torque rod axle
outlet in accordance with procedures in paragraph 4-
18.
bracket.
e. Stationary Clearance Light. Remove and
(3) Remove nut, two flat washers, bolt and two
adapters that secure other end of torque rod to
install stationary clearance light in accordance with
bracket on frame cross-menber. Remove torque rod.
f. Composite Stoplight-Taillight. Remove and
(4) Remove other torque rod in same manner as
install composite stoplight-taillight in accordance
(2) and (3) above.
(5) Using overhead crane or other suitable
g. Retractable Clekarance Light. Remove and
lifting device, attach lifting chains to semitrailer (see
install retractable clearance light in accordance with
slack in chains but do not lift semitrailer.
h. Low Air Pressure Warning Switch. Remove
(6) Remove four nuts and flat washers that
and install low air pressure warning switch in ac-
secure right equaliser beam to saddle assembly.
Remove left equalizer beam in same manner.
(7) Lift semitrailer until chassis is clear of
5-12. Air System Components
suspension. Roll suspension forward from under
a. Air Lines, Fittings, Valves and Air Tanks.
semitrailer.
(1) General. Remove, install, test and adjust
(8) Position suitable supports under chassis
air system components in accordance with
and lower semitrailer onto supports.
(2) Air line nylon tubing. Nylon tubing is
(10) SuPport axles and remove wheels and tires
(pare 4-59).
(3) Air line copper tubing. Copper tubing is
personnel will manufacture all specified brake and
(13) Remove plunger housing assembly (para 4-
35).
contains complete illustrated specifications and
(14) Remove brake air chamber and fail-safe
general fabricating instructions for copper tube
assemblies.
(15) Remove equalizer beam center pin and
(4) Bench test air valves. Direct support
personnel will perform bench tests of air valves
(16) Remove two cotter pins and two nuts that
removed from the semitrailer for replacement. Ap-
secure each end of equalizer beam to beam hanger
pendix E contains illustrated bench test procedures
bracket on axles (fig. 5-5). Remove two springs, two
for all M747 semitrailer air valves. Valves that prove
felt retainers and two felt washers from beam-to-axle
operational will be returned to the supply system.
shaft. Retain felt washers, springs and felt retainers
b. Air Suspension Axle Lift. Remove and install
for inspection.
air suspension axle lift in accordance with procedures
(17) Support equalizer beam and drive out one
beam-to-axle shaft taking care not to damage
c. Air Suspension Springs. Remove and install
threads. Lower free end of equalizer beam to rest on
air suspension springs in accordance with procedures
gouund and remove other beam-to-axle shaft,
Remove equalizer beam from semitrailer.
(18) Remove other equalizer beam in same
a. General. The front bogie on the semitrailer can
manner as (16) and (17) above.