Newer Rk 21 owner first brand new tractor I ever bought hauled it up north out of excitement and anticipation foolishly failed to completely check things over. 2nd time mowing mmm front deck mounting nuts let loose so I was briefly using that deck as a road grader blade. Ran to store to get new 16mm nuts washers and lock washers. Good as new although I do check tightness of most fasteners throughout the entire tractor before use these days, second incident was when tractor was used for awhile the hydrostatic hydraulic fluid would heat up and expand till it leaked out of breather fill cap. Checking the sight glass cuz it doesn't have a dipstick, under close examination was over filled by a a gallon. All other checks I performed on fluid levels and fasteners were correct. I will agree with others a cordless grease gun hands down cuts lubrication of loader pins mid pto u joint and a few other greaseable fittings a Short mostly mess free experience. Usually grease before or after prolonged loader use with 3%=moly minimum. U joints use general all purpose marine bearing grease. I've said it a few times still scratching my head why I didn't buy a a small subcompact like that yrs ago for my up north three acre hilly property.
