Service manual or owners manuel

[theg]

The service interval is way different between the two. They are for a shuttle 1533. Just trying to figure which one to follow. My tractor gets worked so I try and maintain it so it will last. An example would be owners manual oil change 100hrs.... service manual i believe is 300hrs.
I have have done the 50hrs and I changed oil at 150hrs. I am over 200hrs. Now so trying to make a plan.

Any imput is welcome,