Need Stanley SMCU-5 KHR1780 Excavator Controller schematic

[CapLeaker]

Anyone has a schematic for a Stanley SMCU-5 KHR1780 Excavator Controller to share? Its a 24V system. The one I am working on has all 4 MOVs burnt, a hole in the board where the 5 electrolytic capacitors and that heat sink is and a small smd cap decentegrated. The blown MOVs smells so baaaaaad. My truck stinks and by now half of the house too! Just waiting for wifey to

[stj]

nice layout - not like that CAT shit you had before

[CapLeaker]

nice layout - not like that CAT shit you had before

Yes, it is a pretty good layout, not stacked or weird bent like Cummins or Caterpillar. I think this excavator has alternator troubles. The 33V MOVs are done for. Interesting thing there are 2 MOVs paralleled with positive and negative. These caps are rated 63V. So dude goes and measures 27.6V on the batteries?

[stj]

24v system with no load?

[CapLeaker]

24v system with no load?

Throttle full tilt, batteries full, 27.6V on the batteries. I wonder if someone welded on the excavator, or jumpstarted it somehow.

[stj]

maybe, but a storm closeby could do it too.

[CapLeaker]

maybe, but a storm closeby could do it too.

It supposedly was in someone’s shed. Anyway… my bet is the sense wire from the alternator at the moment.

[CapLeaker]

Got this controller repaired and didn’t need a schematic after all.

[stj]

schematics are for noobs

[CapLeaker]

schematics are for noobs

Haha!
still would have been nice to have it instead of tracing the crap out of it. At least it was better than that Miller TIG welder. Still haven’t figured that one out yet. Even if I do some components have no markings. Ugh.