Bendix S4LN-21 Overhaul parts

[BCmuleguy12]

I recently acquired an 0290 gpu that hasn't been started in sometime and I am going through it to try and get it running. When redoing the wiring I noticed the Mag's are already showing a ground at the wire before I have hooked them up on a switch sounding like there is an internal problem. I'm starting to research how to overhaul/ go through them but I haven't found a good source to buy the parts needed to service them. Are these parts hard to find or am I just looking in the wrong places?

The engine has 2 S4LN-21 mags.

TIA

 

[Blownaway540]

Rebuilding mags is pretty tricky, best off letting a pro do it.

 

[SAWGRASS]

common mag
772-473-8703

 

[cowboy]