REVISED 7 Day Tripper Arm and Gear for REVISED Autotrol 440iHV Timer Assemblies made since January 2008. The Black Gear ( AP420A43,#7 Black, PN 1031554 ) that drives Trip Arm Gear often strips out at the same time, so examine it closely before placing your order ( or simply ADD one to your parts order just to be safe ).

NOTE: Only works with the matching REVISED 7 Day Skipper Wheel ( 3007523 ).