Sick 285 MF

After cleaning up the head I have found a crack in each of the 1st and 2nd cyinders (running vertically ). I am going to pull the pistons. To get the sleeves out I am told I will have to weld on the liners to heat the up.

What type of rod ,amperage, polarity ? Or should I mig it?

But to answer your question, liners are removed with a press though some old-timers beat them out with a block of wood and hammer during an in-frame. Heating them will cause them to expand and make removal even more difficult.

Cracked sleeves and Head/Block warpage. IMHO, that block needs to come out of the tractor, be completely torn down, hot tanked and the head and block completely magnafluxed for cracks and checked for warpage. Any less and you risk doing it all again at least one more time.

As mentioned previously, it would seem that the engine may have been badly overheated at some point in it's life. Important to have a working temperature gauge on a tractor and watch it often.

I don't think it's real critical what rod is used, as long as the welder has some welding experience, and is able to "burn" the weld into the sleeve a bit without burning through into the actual bore.