When the ignition key is turned to position «START» («Start») a current passes through the retracting winding of the starter traction relay. Traction relay armature moves drive lever (fork), which in turn introduces the drive gear (made together with a freewheel) in engagement with the flywheel ring gear (or automatic transmission torque converter). At the same time, the movement of the armature of the traction relay closes the contacts, and the starter begins to scroll the engine crankshaft.
To prevent damage to the starter caused by high starter armature speed after the engine has started, the starter overrunning clutch disengages the pinion gear.
Pic. 7.53. Starter