Oliver 550 Hydraulic Problem - Uh-OH - HELP!

I started by trying to drain the old oil. I had already cleaned the hydraulic filter and the I put the 1/4 in. pipe in and a hose to a bucket. I started the tractor and nothing came out. I knew it was low from checking it earlier so I poured 3-4 quarts of Kerosene in the hydraulic fill hole under the seat and restarted the tractor....Nothing.

Now I don't have the cap with the dipstick for the hydraulics so I made a wooden dipping stick and stuck it in the hole. There was only 1/8 in. of goo on the end of it, no oil, no kero. I then pulled the level check plug for the rearend and it was over full.

What do you guys think?

I'm worried that the water that had gotten in there has rusted a hole through the hydraulic oil pan.

Guess I'm gonna wait until I get my shop manual in the mail and then lift the top off and see what i can see.

The tractor was outside for probably 4 yrs and I don't know when the hydraulic dipstic went missing but it certainly wasn't the day before I looked at it. I'm actually hoping that it is a hole in the pan vs the pump.

I was talking to my Dad tonight on the phone and he had a line on a "parts" 550. Maybe things will work out.

Suppose the water could have froze in the pump and hurt it? Or something else?

Are they available and any idea of cost?

Remember the tractor is 40+ years old. I'd venture to say the pump just went bad.

Last new pump I bought was 20 years ago and it was aftermarket. I had to have machine shop make new end piece for it because it kept blowing out. I replaced all pop off valves too. Thinking that pump was expensive and hard to get. If memory is right it was $500 or more. I haven't seen a source for pumps but if I were you I would take the list of parts suppliers I supplied a few topics back and start lookin.