TM 5-1940-322-10
GENERAL INFORMATION,
EQUIPMENT DESCRIPTION, AND THEORY OF OPERATION
BRIDGE ERECTION BOAT (BEB)
MK II-S
NSN 1940-01-526-0770
P/N 12492423
EQUIPMENT DESCRIPTION AND DATA
EQUIPMENT CHARACTERISTICS, CAPABILITIES, AND FEATURES
The BEB MK II-S is a twin diesel, dual hydrojet powered, aluminum hull workboat
27.3 ft (8.3 m) in overall length with a beam width of 8.2 ft (2.5 m) and a draft of
26 in. (66 cm). It is capable of rotating on its own axis at low engine speeds by the
use of water jet propulsion, making it highly maneuverable.
The BEB MK II-S retains the basic design characteristics and safety features of the
MK II BEB. New technology components have replaced older non-supportable
components without changing the overall configuration, locations of controls, and
general operating characteristics and capabilities of the MK II. The MK II-S utilizes
the existing aluminum hull with modifications to its transom and an added
mounting base for accommodating new hydrojets.
New Ultra Jet 305 hydrojets utilize larger heavy duty drive shafts and new intake
grills. Hydrojet steering deflectors are operated in tandem by a single hydraulic
cylinder powered by a Kobelt 7031 helm pump at the boat's steering wheel, and
reverse deflectors (scoops) are individually operated by a TeleflexMorse dual
lever/single function Twin S control linked to hydraulic actuators at the hydrojets.
New Cummins 6BT5.9 engines and Twin Disc MG-5011SC transmissions are
installed utilizing the same motor mount locations and configuration, and a new
single Duramax Duracooler keel cooler is used for each engine. Engine throttle and
transmission gear selection are now combined in one dual lever/dual function
TeleflexMorse Twin MT-3 control. Morse 33C series cables are used on the throttle,
transmission, and scoop controls.
Other features on the MK II-S are:
a. New instrument panel with improved circuit breaker system
b. Redesigned raw-water cooling system with positive drainage
c. 2,000 GPH fore-and-aft electric bilge pumps and portable 6 GPM hand-
operated bilge pump
d. Automatic fire extinguisher system with Halon-free FM-200 extinguishing
agent
e. New master power battery switch and electrical wiring system
f. New 2-speed Lewmar winch (capstan)
0002 00-1
