What are some safe options to replace a broken shear pin on the rear main winch? Would a grade ? bolt work as a replacement or ? This was the 1st time Ive ever put a load on it and the drum stopped moving completely. I got under there and saw the hyd motor would turn but the coupler was spinning on the winch input shaft. What I could see is a silver pin with a cotter pin thru it.
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M936 Rear winch shear pin options
- Thread starter guns1977
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I do believe that the pin is an aluminum alloy. Replacing with a steel pin guarantees that you will bust the aluminum winch housing. If your load shears the pin, you need to be using blocks.
Thats what I was thinking it was some type of alloy with it a silver pin but didnt know if a grade 5 bolt would be safe to use temporarily. Eastern surplus has this one https://www.easternsurplus.net/Part...Shear-Pin-Wrecker-drag-winch-M543A2-M816-M936 but it looks like its steel with relief cuts
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- Burgkunstadt, Germany
Have you looked in a parts TM to see what part you need? That way you KNOW whats the right part.
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- Tonopah, AZ
I have some pins in my M936, I will try to remember to take a photo later and post it.
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@M35A2-AZ I beat you to it-
Attachments
- 3,217
- 390
- 83
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- Tonopah, AZ
Here is a pic of the pin 5/8" dia. 
and it is made of steel.
and it is made of steel.
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I tapped my broken one out with an Allen wrench and a hammer.
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I notice the head on yours is different than the one in my picture.
- 16,031
- 22,540
- 113
- Location
- Burgkunstadt, Germany
I am not a truck guy. But I have replaced several shear pins on several different types of trucks. All of the shear pins looked like what @M35A2-AZ pictured.
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- 113
- Location
- Burgkunstadt, Germany
What is the NSN on your truck?
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When I broke my shear pin on my wrecker, @M35A2-AZ was gracious enough to send me one exactly like the one he pictured. I ordered spares that are like the one I pictured. The cutouts on the shank are in the same position. I'm presuming the difference in the shape of the head is merely a variance between manufacturers.