About The Mpd; Parking Brake - CMC Rescue MPD User Manual

ABOUT THE MPD

4

PARKING BRAKE

A unique feature of the MPD is the Parking Brake, which when locked,
prevents inadvertent letting out of the rope. The design of the Parking
Brake allows for rope to be taken in if required without having to unlock it,
although increased rope friction will be encountered. Lock the Parking Brake
prior to releasing your grip from the running end of the rope, except when
the MPD is rigged as a ratchet or progress capture in a pulley system. For
example, once the rigged MPD is connected to the anchor, for safety, lock
the Parking Brake until you are ready to use the device. To fully lock the
Parking Brake when using untensioned, icy or saturated rope, it may first be
necessary to pull out the Release Handle and rotate it clockwise to further
force the Moving Brake against the rope.
THE MPD
To rig the MPD, first ensure that the Parking Brake is unlocked. Hold the
MPD so that the back plate faces up. Take note of the diagram showing
the proper rope orientation, then open the MPD by rotating the back plate
clockwise until there is sufficient space to insert the rope between the fixed
and moving friction brakes.
Insert the rope with the running end between the friction brakes and place
the rope around the pulley in a clockwise direction. The load end of the rope
exits the pulley opposite the friction brakes. Close the MPD by rotating the
back plate completely counterclockwise, making sure that the rope properly
enters and exits the MPD as shown in the diagram on the back plate. Attach
the MPD to the anchor using an appropriate locking carabiner or screw link
through both the front and back plates.