a. Each of the removable panels has eight wood boards, interlocked edge-to-edge with horizontal shiplap
joints to form a solid wall 48 inches high. Each panel on M127 semitrailer has a wooden top rail and steel
stakes. Each panel on M127A1 thru M127A2C semitrailers has a steel top rail and steel stakes. The boards
are secured to the stakes with screws and nuts.
b. Stakes fit into stake pockets set into the outside edge of the body frame. All panels have interlocking
brackets at their outer edges near the top rail to connect them with the adjoining panels.
c. A retaining pin is chained to each side rail beneath the center side panel and to the full-width bumper
beneath the right rear panel. The stakes of the center side panels are fitted into their stake pockets after all
other side panels are in place with their lock brackets interlocked. When the retaining pin is inserted in the
hole of the center side panels' stake, all stakes on that side are locked in place. The right rear panel is similar-
ly installed and locked in place after left rear panel. The stakes of the front panel are bolted into their pockets.
d. On the M127A1 thru M127A2C semitrailer, two keyhole-type slots are provided at the top of the front
side panels and one slot each in the third, fourth, and fifth side panels. Each slot secures a link of the chain
which is anchored to the T-bracket welded on the opposite side rail. The chains brace the side panels and
prevent them from pushing outward at the top when the semitrailer is loaded.
e. There are four rope knobs at the rear of each of the rear side panels.
Figure 2-21. 24-volt ventilating fan (M128 and M129 Series)
a. Provides ventilation for vans.
b. Toggle switch above fan controls operation.
c. Located in rear upper left corner of van.