Abstract: A tether switch is connected to both the operator presence system and the automatic lubrication distribution system on a harvester such as a cotton picker. A lubrication control switch on the instrument panel of the harvester is connected to the tether switch and to the lubrication control and is switchable to a first condition wherein depression of the tether switch activates driven components on the harvester and the lubrication system to cause lubrication to be pumped to the moving components. The tether switch may be moved between harvester cab and harvester unit locations so that, when the control switch is in the first condition, the operator can cause the units to be lubricated while he watches the driven components from a location remote from the cab.