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tach

  1. S

    KX-121-3 2009 - no tach, no hour meter, No Aux error 53 on display

    I purchased this used machine with a new consul display. and new AI controller. The hour Meter says .4 hrs and does not move the. The Aux thumb does not operate and the RPM Gauge reads nothing. The display reads "53 sensor supply short 12V" The machine starts and runs great otherwise. But, I...
  2. J

    CAT 420F HAND THROTTLE SWITCH NOT WORKING - Need Wiring Schematic

    I recently bought a used '13 420F and among other issues I've found, the hand throttle dial doesn't work. I tested a few 420's at ritchie bros the month before I drove it and those didn't work either - is there some kind of safety switch or procedure to allow it to engage? It looks like the...
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