Appreciation post: I swapped the standard brake coil on a 20-year-old Dover for a generic one and it chattered like crazy.

Turns out the old Dover coil had a specific resistance of 42 ohms, and the generic was 38, which the controller didn't like at all. Anyone know a good source for true OEM-spec parts for these older units?

3 comments

3 Comments

patriciarivera29d ago

Oh man, that's the worst sound. I had the exact same thing happen on an old elevator at my apartment building. We tried a universal coil from a big parts website and it sounded like a bag of rocks in a dryer. The super finally tracked down the right part from a local supplier that specializes in older elevator models. Have you checked with any of those smaller, specialized industrial parts places?

stella2229d agoMost Upvoted

Yeah those universal parts are such a gamble. Did your super have to call a bunch of those specialty places, or did they find one that had a catalog for really old models? I've heard some of those suppliers keep records for stuff that's like 50 years out of date, which is wild.

abby_martinez29d ago

Tbh that bag of rocks sound is exactly why I avoid universal parts for old systems. The local suppliers usually have the right specs to match the original motor. Honestly it's worth calling a few even if their websites look outdated.