Thermal foggers and ULV machines run on combustion or high-speed motors, and both generate continuous vibration for as long as the machine is working.

That vibration is meant to be absorbed by rubber mounts and correct fixings. But once the rubber degrades or a rotating component loses balance, the force transfers straight into the frame and every bolt.

This article tells the true story of a passenger bus terminal that had a component come loose mid-round, and explains what vibration does to a machine and how to tell whether yours is vibrating beyond normal.