Squirrel Cage

 I know what you are thinking.  This doesn't look like a squirrel cage.

 That's what I thought when my husband mentioned that he was tired of hearing the squirrel cage rattle in the tractor and he was determined to fix it.

 It seems the "squirrel cage" is some sort of fan system in the roof of the tractor.

 I wouldn't be comfortable up that high.

 Good thing he is okay with it.