cub lo boy
Doesn't it pour down the dipstick hole?
Not usually. The dipstick hole is 1/2" in diameter. The filler hole should be a 1 1/2" opening with a screw cap. It's hard to get 1.5 gal. of oil down an unvented 1/2" tube.
Here's a link to the I&T shop manual. You should not be with out a shop manual. You could get your answer quick by joining an international forum. If you asked about your Ford 641 I could answer you, but I'd rather not guess with your tractor.