I've got a 773 F series and i cant seem to be able to get the pins out that hold the bob tach to the loader arms. Any ideas?:Banghead
Biggest sledge you can swing. There is no real secret. I have used the old bolts and blew the threads outs trying to drive them out.
That's a tapered pin isn't it? Best way to loosen a taper is to put some pressure on it lengthwise and strike it from the side. In that case probably have to hit the boom where the pin is. The force and vibration will deform the bore enough to break the hold of the taper if you are lucky. Sometimes nothing really works well though.
They are only "tapered" on the end i.e. cut on a 45 degree angle. The pins are likely seized in their bores due to a lack of use and lubrication. BobcatDan's method is more directionally correct: pound them out. Depending on the design of your bobtach, you may be able to heat the sleeves with a rose bud. That should make them easier to hammer out. It can be an SOB of a job no matter how you slice it. Best of luck!!
Sorry, I misinterpreted the question!! My bad!! Yes they are tapered on then end. I did mine by buying longer grade 8 bolts that would thread all the way to the bottom of the holes, then hit them as hard as I could. Don't forget to removed the grease fittings first. One of my original pin retaining bolts was so corroded that I had to drill the head off of it to get it out. Again, best of luck!!
The pins are designed to wedge tight in the arm. They do not move, the Bob tach rotates over them. The fact they are tight is a good thing. When repairing pivot pins, if they do not fit tight, the arm needs to be reamed. If not, the retaining bolt will not stay tight.
New Holland pins in the arms are similar and the maint book recommends striking from the side to loosen them and it does work better than a longitudinal blow. Hard to do in some cases though.