CARGO BED COVER (CBC) HMMWV, TYPE I
THEORY OF OPERATION
THEORY OF OPERATION
The Cargo Bed Cover (CBC) HMMWV, Type I unit is designed to be mounted on the HMMWV for
purposes of carrying and storing equipment for use in the field. The CBC is suitable for worldwide
transportation and storage environments, including helicopter airlift when mounted on the HMMWV. It
is waterproof, vented, CARC painted and secure. CBCs are painted in either sand color or in a
camouflage pattern. The CBC shell features include a non-skid interior floor and exterior roof,
equipment mounting provisions on three walls and the roof panel. The shell is composite fiberglass,
which makes it resistant to the harshest of environments for the life of the CBC. All attaching hardware
is corrosion-resistant. A CBC installation kit containing the required hardware and instructions for
mounting is furnished with each CBC. The CBC is mounted to the HMMWV using six holes in the bed
with no modification to the HMMWV whatsoever.
The CBC has two doors, an upper and a lower door, located at the aft end to gain access to the unit.
The doors can be latched together to operate as a single door or operate separately. An override lock
on the inside of upper door allows personnel to exit in case of an emergency. Access from the
HMMWV to the CBC can also be obtained by way of sliding cab access doors, located at the forward
end of the CBC.
Additional features of the CBC are as follows:
Two 2-way ventilators for air circulation.
Two access plates, one each side, when unscrewed allow cables to be pushed through the cable
boot opening for connecting with equipment inside the CBC. When unscrewed, the access plate
hangs to the outside supported by a lanyard.
Storage access panels, one on each side, when closed, provide storage space for storing tools or
A tie-down rubber strap fastens the storage access panel assembly to the HMMWV.
A 24 ladder is stored inside the CBC and held in place by a ratchet strap assembly. It is used for
climbing into the CBC.
Two folding steps, located at the aft end, when extended, provide access to the roof of the CBC.
The steps are spring-loaded.
Two chest handles are located on the roof to grab onto when climbing the steps.
For lifting the CBC, lifting rings are attached on each corner near the top.
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