TM 5-5420-203-14
c. Loading/Unloading of the Scissored Bridge to/from a Flatbed Semitrailer
(MS71 or M872 ) - CONT
CAUTION
When securing the bridge to the trailer, DO NOT pass the steel chains through the aluminum
pin holes of the center hinges or connectors. If this is done, damage to the aluminum pin holes
will result, rendering the bridge inoperable.
(2) Unloading. Unloading the bridge from the flatbed semitrailer is essentially the reverse procedure
of loading.
WARNING
Prior to releasing and removing the tiedown chains from the bridge/trailer, the launcher
should be engaged to the bridge on the trailer to prevent the bridge from slipping or shifting
its position.
When releasing the tiedown chain binders use extreme caution to avoid binder handle backlash.
The vehicle operator should wear protective headgear or close the hatch when recovering the
bridge onto the carrier to prevent injury from falling rocks and debris as the bridge is brought back
into the travel position on the launcher.
(a) Move the vehicle forward, lower and position the tongue for engaging the launching
diaphragm of the bridge.
(b) Ensure that the pintles of the tongue are fully seated into the launching diaphragm.
NOTE
The assistance of a crewman is needed for directing the engagement of the pintles
into the launching diaphragm, and making the two hydraulic line connections on top of
the diaphragm.
(c) With the launcher connected to the bridge on the trailer, remove the tiedowns and chain the
tie-rod ends of the bridge.
NOTE
Coordinating the movement of these two cylinders lessons the pressure on the trailer and
reduces the chance for blowing out trailer tires.
(d) Proceed to retrieve (lift) the bridge off the trailer, by working both launcher levers (#1, the
overhead cylinder, and #2, the tongue cylinder) in unison.
Change 2 2-93
