1-7. PURPOSE, CAPABILITIES AND FEATURES (Cont)
(4) Semitrailer M129A1, M129A1C, M129A2C Special Features.
(a) 12-ton, 4-wheel supply van semitrailer.
(b) Used as supply van.
(c) Body has seven windows with blackout covers.
(d) Front window is stationary. Six windows (three each side of trailer) are retractable.
(e) Additional 110v ac electrical system with dome lights, wall receptacles, circuit breakers, and
a. Model M127.
. Straight air brake
. Timken 36,000 lb tandem bogie suspension with leaf springs
. Thomas or Westran landing gear
Structural weldment frame
. 24-volt lamps and wiring
. 4-wheel internal brakes are located within the brake drums and consist of S-cam, 2 shoe, double-
anchor expanding-type wheel brake assemblies
b. Model M127A1.
. Air-over-hydraulic brakes
. Military standard axles, hub and drum, air chamber (bogie assembly and brakes)
. 24-volt electricaI system
. Military lights, service, tail and stop
.Military type blackout lights
.4-wheel internal brakes located within brake drum, consists of 4-hydraulic operated self-centering
.FR2S-type wheel brake assemblies
Equipped with chains which support the panels and lifting rings for hoisting the semitrailer
_. Model M127A1C, M128A1, M128A1C, M129A1, M129A1C.
. 24-volt electrical system and a separate 12-volt lighting system
. All features of M127A1
d. Model M129A1, M129A1C, M129A2C.
. Additional 1100-volt ac body wiring for dome lights
_. Model M127A2C, M128A2C, M129A2C.
Later design of bogie assembly and service brakes (axle, spring seat, "U" bolts, torque rods, hardware
. Tail lights consist of:
(1) TwO 24-volt composite tail, stop, turn and marker lights
(2) Two 12-volt stop, turn and tail lights