When the control handle is set to the LOCK position, the follower moves along the oblique groove in the control handle and causes the clutch (which is always in mesh with the free-wheeling hub body) to engage the splines of the inner hub, thus coupling the free-wheeling hub body with the driveshaft.
When the control handle is set to the FREE position, the follower moves along the oblique groove in the control handle and uses the tension spring to disengage the clutch from the splines of the ineer hub, thus separating the free-wheeling hub body from the driveshaft.
| Fig. 2: The internal workings of the manual-change, free-wheeling hub assembly — some 1983–88 Monteros |