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CMC MPD Manual

Multi-purpose device
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MPD™
MULTI-PURPOSE DEVICE
Pulley
Descent Control
Belay
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Summary of Contents for CMC MPD

  • Page 1 MPD™ MULTI-PURPOSE DEVICE Pulley Descent Control Belay • •...
  • Page 2 Thank you for selecting the CMC MPD™ for your technical rope rescue systems. Truly a multi-purpose device, the flexibility and versatility of the MPD reduces the number of components in a rescue system and simplifies system rigging. The result is a safer and more efficient rescue.

  • Page 3: Table Of Contents

    Securing the MPD Using the MPD as a Descent Control Device To Lower To Stop Lowering Using the MPD as a Belay Device Belaying a Lowering System Belaying a Raising System Mirrored Systems Using the MPD in a Mechanical Advantage System...

  • Page 4: About The Mpd

    ABOUT THE MPD The MPD is designed for use with static or low-stretch life safety rope. Use only rope that has been inspected, is of proper size and is in good condition. The user should be aware that environmental conditions may have an effect on the rope’s interaction with the MPD.
  • Page 5 As with all new rescue equipment, the MPD should be thoroughly inspected before being placed in service. The MPD is a robust unit but should still be inspected after each use to ensure that damage did not occur. When inspecting, look for any damaged, dirty or sticking components, excessive wear or any other factor that may prevent proper function.

  • Page 6: Parking Brake

    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.
  • Page 7 ROTATE BACK PLATE REVIEW DIAGRAM FULLY OPEN FOR PROPER LOADING Anchor Running End Running End Load End Load End CLOSE AND SECURE INSERT ROPE BACK PLATE Parking Brake must be unlocked to load.
  • Page 8 END OF THE ROPE TO ENSURE PROPER RIGGING PRIOR TO COMMITTING A LIVE LOAD OVER AN EDGE. WHEN RIGGED PROPERLY, THE MPD WILL LOCK UP. THE MPD MUST BE PROPERLY RIGGED PRIOR TO USE Tug on Load End Running End...

  • Page 9: Securing The Mpd

    If the MPD is to be left unattended, or if you need to release your grip on the running end of the rope for...

  • Page 10: Using The Mpd As A Descent Control Device

    Using the MPD as a descent control device allows for a high degree of responsiveness and control. As the rescuer or rescuer and patient approach the edge, it is very easy to take in rope through the MPD to prepare for the edge transition. Pre-tensioning of the Main Line is also simplified because of this.
  • Page 11 Begin lowering by rotating the handle slowly counterclockwise all the way to completely unseat the Moving Brake from the rope, controlling the rate primarily with friction on the Fixed Brake V-Groove. Maintaining the “S-shaped” bend in the rope will improve the function of the braking mechanism in the event it is needed and will increase the service life of the Moving Brake, reducing the potential for rope creep through the device.
  • Page 12 Unlock the Parking Brake. Grasp the Release Handle and pull up to engage the release mechanism (1) and then rotate counterclockwise to lower (2). Rotating the Moving Brake off the rope may significantly increase the service life of the MPD. Pull up to engage the...

  • Page 13: To Stop Lowering

    FOR HEAVY LOADS Add additional friction by threading the rope over the Secondary Friction Post. Load TO STOP LOWERING To stop lowering and lock the rope, disengage the Release Handle. NOTE Although there is a return spring to assist in disengaging the Release Handle, it is the user’s responsibility to ensure that the handle is fully pushed in when not actively lowering.

  • Page 14: Using The Mpd As A Belay Device

    USING THE MPD AS A BELAY DEVICE The MPD is designed to be used as a belay device to arrest a falling load should the Main Line system fail. It is recommended that during edge transitions, while either lowering or raising loads, that the Belay Line tension be kept hand tight and without slack in the line.
  • Page 15 Therefore, in a Shared Tension lower it is imperative that the running end rope of the Belay Line be held back toward the anchor, maintaining the “S-shaped” bend as the rope runs through the MPD. If there is a sudden change in speed or tension on the rope running through the MPD,...
  • Page 16 The other hand feeds the running end into the MPD so that the rope is unseated from the sheave tread . This will reduce rope drag on the sheave and keep the MPD from inadvertently locking up.

  • Page 17: Belaying A Raising System

    MPD. This way either rope system can perform either function, without the need for complex changeovers or function specific equipment. Additionally, if an MPD is used for both the Main Line and Belay Line in a Shared Tension System, then should either of these systems fail, the other rope system can serve as a belay and the potential arresting distance is minimized since both ropes will be pre-stretched.

  • Page 18: Using The Mpd In A Mechanical Advantage System

    USING THE MPD IN A MECHANICAL ADVANTAGE SYSTEM The MPD is designed to function both as a pulley and as a ratchet or progress capture device in a mechanical advantage (M/A) system. After lowering, there is no need for a complex changeover between a lowering system and a raising system.

  • Page 19: Additional Information

    For more information about using the MPD, visit cmcpro.com/videos to watch instruc- tional videos. Additionally, the CMC School provides comprehensive, hands-on training for all advanced techniques. For questions or information on training with the MPD, or any other CMC product, please call (800) 235-5741 or email info@cmcpro.com. CARE AND MAINTENANCE During all use, carrying, storage and transport keep the equipment away from acids, alkalis, rust and strong chemicals.

  • Page 20: Inspection And Repair

    2500. LIFESPAN / INSPECTION / RETIREMENT CMC does not specify an expiration date for hardware because the service life depends greatly on how and where it is used. The type of use, intensity of use, and environment of use are all factors in determining serviceability of the equipment.
  • Page 21 • Keep foreign objects out of the device. WARRANTY & REPAIRS If your CMC product has a defect due to workmanship or materials, please contact CMC Customer Support at info@cmcpro.com for warranty information and service. CMC’s warranty does not cover damages caused by improper care, improper use, alterations and modifications, accidental damage or the natural breakdown of material over extended use and time.

  • Page 22: Specifications

    Weight 1.1 kg (2 lb 8 oz) Rated Strength • Pulley 46 kN (10,341 lbf) • Becket 26 kN (5,845 lbf) 11 mm Rope Model Photos used throughout this manual are CMC Part Number 333000 MPD 13 mm Rope Model.

  • Page 23: Quick Reference Guide

    2. Tug on load end of rope to verify correct rigging before use. 3. Lock Parking Brake when MPD is not under load. 4. Lock Parking Brake and tie off MPD when left unattended. Descent/Lowering 1. Hold rope firmly back against Fixed Brake V-Groove, maintaining “S-shaped”...
  • Page 24 6740 Cortona Drive Goleta, CA 93117 USA support@cmcpro.com (800) 235-5741 cmcpro.com Control No. 910014_Rev01...

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