Greetings Esa,
Welcome to the site!!!!
Here are the part numbers I *believe* you will need.
15261-51010 Injection Pump Assembly (Qty 1)
15221-52110 Injection Pump Shim (Qty 5)
66621-36740 Arm Lift RH (Qty 1)
01153-51045 Bolt (Qty 1)
04512-50100 Washer, Spring Lock (Qty 1)
66494-65101 Assy, 3-Point Linkage (Qty 1)
***Please note, Kubota sometimes uses different parts in different countries, so it is important that you check with your local Kubota dealer to make sure they are correct***
The 3-point assembly is available aftermarket for less money. Check with local tractor dealers or eBay to locate a kit that will fit.
It would be best if you could contact the previous owner and find the original pump. Even if it was damaged, they can often be rebuilt for much less than buying a new one.
You will like the tractor once you repair it!
I hope this helps.
Kind regards,
Steve