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Did they or did they not serve as a dual purpose pin to hold up the hitch and lock into the latch
Rick Prentice wrote:Did they or did they not serve as a dual purpose pin to hold up the hitch and lock into the latch
The answer is YES. Click on the linkhttp://www.farmallcub.com/phpBB2/viewtopic.php?f=1&t=60272&p=495724&hilit=fast+hitch+lock#p495724 and scroll down to the pic I posted a couple years ago. I'm trying to get and find where I found that picture(clicking properties doesn't tell me anything) but I didn't just make things up Hang in there, I'll find it sooner or later.
This is the exact reason it's good practice to give credit to the source(obviously I failed on this one)
Jim Becker wrote:There are 3 different part numbers for that latch. You wouldn't think something as simple as a latch would get that much attention. The loop style came first. The part number was 517786R11, which included a roll pin 576485R1 that the spring presses down on. I have a few of these around. My '59 Lo-Boy, which is my only hitch that I consider likely as original to the tractor, has this. The second style is 523110R1, which is evidently hook style and still calls out the 576485R1 roll pin. I don't have a sample of this one, so the open hook is conjecture. The parts catalog with that part number shows an open hook. This part eventually progressed to R3. The third style is 393500R1 which has an open hook and the sides are cast in a shape that eliminates the need for a roll pin. I have some of these too.
As far as when they changed, all I can say is that evidently, the first was used until at least '59 and that the third was already in the parts catalog in 1970. So both changes were in the '59 to '70 range. The other posts already in this thread, where the hitch is known to be original to the tractor, narrow it down some more.
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