Question about CMP winch?
What pull are they rated at?
I’ve looked through my various manuals and though I think I remember seeing it once I can’t seem to find it. My reason for asking is that I finally mounted the 125 feet of 5/8 in cable on my 1941 C60L and well if you’ve got a winch why not use it. But looking at the breaking strength of the cable 20.6 Tons I realized that this is not something you want to use with 3/8 chain from the hardware store.
One of the first things I discovered/read in the drivers handbook is that the cable must be wound on to the drum under tension. In doing this I soon discovered that the winch was perfectly happy to drag the truck with the brakes locked on. After a couple of tries I learned the proper amount of brake to wind cable on smoothly. Then I started playing a little with the winch, thanks to Bob I have a pair of the winch scotches my first experiment was to place the scotches as shown in the book using some 6000 lb tow cable and chain lengths for proper adjustment. With the truck sitting on the hard packed gravel drive and the cable run out 50 feet and chained to a very large pine tree, transfer case in winch position, slowly released the clutch and the cable brake and throttle just above idle, the truck started to move slowly back as the scotches sank into the ground and the truck just kept moving. The scotches just cutting two trenches, then I applied the brakes both drum and parking to check what was happening under tension.
What was very clear is that there is a great deal of pulling power available, two that the light chains and cable I’d used on the scotches were exceeding their useable strength (near breaking), third that if I’m going to actually use the winch I should use only scotch cables and attachment chains that are rated to the capacity of the winch. Hence my question what is the rated capacity of the winch?
One last point unlike most US Military winches that have a shear pin which is defeated when it breaks the first time and is replaced with a harden bolt, I don’t remember seeing any designed shear pin in the CMP winch, is there one?
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