The CLE Steamer's definitions
A lever that is either attached to the steering column or the dashboard of a semi-tractor within the drivers reach that controls only the application of the trailer brakes.
Since I own my own tractor and am always pulling a company trailer, I always use the Johnson Bar to apply the brakes so I will never have to pay for a brake job on my semi-tractor.
by The CLE Steamer May 11, 2009
Get the Johnson Barmug.