UJD42510 Tachometer---Replaces AR21664R

Replaces number AR21664R, AR20055R; AF2066R
AR20053R, AR20836, AR21661, AR21662, NJD584

Fits A sn 648000 and up, B sn 201000 and up, AR/AO sn 272000 and up
50, 60, 70, 80, 520, 530, 620, 630, 720, 730, 820, 830, Gas and Diesels