Thanks john. Ultimately we convinced the building owners it would be more cost effective long term to do a mod. Hopefully the motion 4000 we suggested is at least half as reliable as this has been over the years. 54 years of service. We did end up checking door locks, motor brushes, tach & tach brushes, all controller connections, meter tested SCRs, brake clearance, gearbox, adjusted TR2 for less rollback, without any luck. If we had some spare boards to swap out we could have tried it. We did discover that the elevator could not pick 1500lb of its 3500lb capacity without constantly tripping the comparator board which i think indicates motor and or drive components could be getting weak or out of adjustment.
