Idler arm removal
In my late 40's as arthritis started to march onwards, the smartest thing I ever did was to buy a Great Big Proto ball pein "dead blow" hammer. These are hollow and have weights inside. When you "hit" something, they REALLY "hit."
You can easily "see" the difference by just taking a "reglar" hammer and a dead blow and giving each a medium smack on a concrete floor or solid (anvil) etc. The "reglar" hammer BOUNCES. The "dead blow" pretty much stops---all the energy as been transferred to the target.
Mine is black. Maybe if the damn thing was red I wouldn't misplace it, LOL