Mounts and isolators are the rubber pieces sitting between things that vibrate and things that don't want to. Their job is to absorb the shake so the rest of the machine doesn't have to. When they crack or compress, everything they were protecting starts feeling the vibration — and vibration is what loosens fasteners, cracks welds, and wears out bearings early.
This is the genuine Nilfisk Advance OEM MOUNTING FRAME CAPAC, part number YLQ14601, brand new in the box. Here's a shop tip: they wear together, so if one's shot, the others are probably close behind. Replacing them as a set is usually cheaper than doing them one at a time as they fail.
If your machine's gotten louder or shakes more than it used to, the mounts are the first thing to look at.
Not sure this is the right mount for your machine? Send us the model and serial and we'll confirm.