allis chalmers d17

I bought a D17 that needed the hydraulic pump repaired. I used it before the pump was repaired and it ran and pulled fine. Since then it has not been pulling as well. The last time I tried to use it, it would barely pull itself. It seems the pump is loading the motor up. Any ideas?

I have the oppertunity to get an old ac d17. he wants 1600 or trade for ??? i have a quad up for the part!! So now, is this a good tractor? are parts still available ??? what size disk might i be able to pull with it?? I mostly want it to pull a disk. i feel like im killing the mf which is...

I Have a guy that want to trade me his allis chalmers d17 for my jetski's im only asking $2000 for my skis is this worth it I havent heard much about this tractor at all and was kinda cirious. What do yall think and is it worth 2k? Its an Lp gas dunno the serial #

I wouldn't exactly consider a D17 vintage but this seems the best forum for it. I just bought a Allis Chalmers D17 that is in need of some new rear rims and since I am in Reno right now I want to call around at salvage yards and tractor dealerships to see if they have any laying around. But...