I too just got my Bush Hog 2400 loader on the 1365 Oliver going. It works like a champ. Yes the pto has to run to keep the pump operating, but I find that to be no problem.

For others thinking of this procedure for their Oliver, call Otis Wright at 812-967-3029. He's been at the Oliver trade since High School and is likely nearing retirement.

My pump is an Eaton with the numbers 26009-RAL and B060525SL stamped on it. It has two mounting holes 4.050 center to center. I used 3/8 bolts and tapped the existing blockoff plate for them. Also this plate has to have a center hole measuring 3.250 for the boss that is on the pump body. I had to make a .250 shim out of aluminum plate sandwiched between two gaskets to get the right end play clearance for the shaft to fit into the pto drive and not be too tight.

The coupler gear measures 1.164 on the OD and .700 on the ID. It has 10 teeth OD and 9 teeth ID. Length is .750. This gear is AGCO #71386141
Sorry, but I didn't get a measurement over roll pins for the gear.
I also used a tank for the reservoir from my local salvage yard. It had been an air pig and I got the bungs at my local hydraulic shop and welded them in. I left the air valve on until I was done so I could pump up the tank with air to check my welds for leaks. One leak, rewelded and bingo, ready to go. This was so easy. I mounted the tank and filter under the spool valve where it looks good and is out of the way. Back to the hydraulic shop to get the hoses made. For the lower hose going to the pump I used 3/4 inch hose and fittings and for the hose from the pump to the spool and from the spool to tank I used 1/2 hose and fittings. 

The pump and gear cost around $400 and the hoses, fittings and filter costs another $250. It took me  less than a day, but I am close to the hydraulic shop and had the tools to do the job.

This is a procedure that can easily be done if you have the right tools and the desire to do it. This makes the OLIVER 1365 a great little loader tractor. Now my clutch is getting weak, I don't look forward to replacing it either. I hope this posts helps anyone trying the same thing,John Brewer.