John Deere Quick Tach Actuator 

Part# AT414407 , SS440 , AT494284, WN-AT424407

Compatible with the following Models: 
318D, 320D, 323D, 319D, 329D, 328E, 329E, 332E, 333E, 326E, 318E, 319E, 320E, 323E, 318E, 319E, 320E, 323E, 326E, 324E, 328E, 329E, 326E, 318E, 319E, 323E, 320E, 324E, 320G, 330G,