Lower radiator hose

[DONLI]

Went out today (55F) to plow the Slush from the driveway, and when dumping a load of slush/ice I notist green snow!
looked under tractor and anyifreeze was pouring out, popped hood and found a large leak at bottom radiator hose, when I grabed hose it came completly of of the pipe on bottom of radiator.
(Lost all of the coolent)
Has anyone had this happen to them?
Ckd hose and radiator for why this happed but all looked good!
Put hose back on and filled with coolent, run engine until warm and found no leaks.
My question is wy did this happen hose clamp was tight on hose.

Don

 

[Pony Doc]

I recently changed the water pump on a 26 year old, 1200+ hour tractor. The lower radiator hose was disintegrating but not leaking (yet) at the clamp attaching it to the radiator. It would only have been a short time time before a catastrophic failure.

 

[Hugo Habicht]

The hose on mine burst. Just old age. I remember vaguely that the service instructions from Kubota require all water hoses to be replaced every few years (which I do not do).

My question is wy did this happen hose clamp was tight on hose.

The most logical explanation is that the hose clamp was not tight. When heating up there is pressure in the system. Depending on the hose diameter the forces pulling off the hose can be quite substantial.