On certain brush chipper trailers, the bolts that attach the safety chains aren't long enough. As a result, if the trailer becomes uncoupled from the tow vehicle, the safety chains could separate from the trailer. This could allow the trailer to detach from the tow vehicle.
A trailer that separates from the tow vehicle could create the risk of a crash.
Vermeer will notify owners by mail and instruct you to take your trailer to a dealership to replace the bolts that attach the safety chains to the tongue/towbar.