One of my Fire lift ramps will not stay up high enough. The ball catches rolling downward. I suspected the "lift crank assembly" and replaced it. You can see the working, "original" on the left, the new Marco on the right. I think that right crank is not correct as it will not "lock" in a more vertical position. Any comments. I am also not able to find any other vendors for the part number listed in both Marco and in the Fire Manual A-11137 thanks in advance
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