Case 580CK hydraulic pump.

The splined shaft is intact, but I suspect something internal is damaged. The shaft is nearly impossible to turn by hand.

Any info would be greatly appreciated. Thanks in advance for your time. Cheers!

KellyR, I went through the failure of my Pump (530CK) that blew its seals. The short Splined Shaft was twisted nearly 45 deg (end to end)

I was advised to replace the PUMP and not rebuild as those pumps simply wear out. I think a new pump & shaft was ~$300.(CAN)

I think my failure was that I was running low on Fluid & the pump was squealing. (thought that was normal. NOT)

Hope this Helps

Thanks for the info. We wound up pulling the whole pump off and took it into a local shop to have a look. It seems the keyed shaft had twisted off where it attaches to the impeller inside the pump. The main reason being that the bearings were shot. They machined a new shaft to put the impeller and spline back onto, plus ordered a new set of bearings to replace. I lucked out, tho. The machinist lives a few miles down the road from my acreage and needs a couple trenches dug, so its all barter & trade, no cash outlay. (cost would have been just under $300, tho. Good estimate!)
Thanks again!

Kelly