I posted this on implements as well, but wondered if anyone here might know. I have a model 70 5 bottom IHC pull plow, the plow seems to be missing the rod and spring steel on top of the beam. This is a trip plow, it has a shear pin, but on top of each beam, there is a flat steel bent into a sort of spring shape, that appears to hold a pin down that goes through the beam. I know it has something to do with the tripping of the beam, but wondering if it is needed for sure. I am missing 3 of the 5. I looked at a semi mounted plow that is going to be on a sale to see if it had them, and it was also missing some. My question is are they needed, and what are they for. Thanks-Bob