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Replacing traction tire and now a dead MTH PS2 FEF.

V VADarthDadOGR Forum Member SUPPORTING MEMBER

So I noticed my MTH PS2.0 UP FEF 20-3044 needed a traction tire.  One missing, one stretched beyond use.  Easiest traction tire replacements EVER.  Decided to lightly oil and add grease while it was down and upside down.  I did have to take off the rear pickup roller to get the grease screw out, but that was the only thing "electric" that I touched.  Put it back on the track, powered it on, only to notice a very faint waft of smoke coming from below the engine but above the drivers. Not near the stack.  Not good.  Powered down immediately - power couldn't have been on more than 15 seconds.  Did not smell like electronics were on fire, but it didn't smell great.  IMO it wasn't burning residual leaking smoke fluid.  Took the top casting off - no noticeable burns from what I could see.  Put it back on the track, top casting next to the bottom, powered via tether.  Nothing.  No noise, no relay click, no nothing.  DCS doesn't recognize engine.  Put engine back together.  Put on test track.  Nothing.  Dead.  I know replacing a traction tire, adding a missing traction tire, and tiny amount of oil/grease did not do this.  It had to be coincidence, right?  

Any suggestions?

Dave

Last edited by VADarthDad
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V VADarthDadOGR Forum Member SUPPORTING MEMBER

That's what I assumed, but I don't think there is any way to disturb this wire directly.  The pickup roller assembly mounts with a screw to a the underside of the engine casting.  What looks like an essentially blind connection - There is nothing connected inside the engine, that I can see, that could have mechanically been disturbed by this.  But agree that something got disturbed and probably shorted to chassis.

But now, it is not obvious how to get the PS2 board assembly out of the casting.  It is wider than the casting...

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G GGGOGR Forum Member

I am ok saying coincidence for this unit.  I have had to repair quite a few FEF, some with very little run time.  That 5V board tended to have a high failure rate over other units.  So it doesn't surprise me.

The easiest repair is a PS-2 3V board set with 5V connectors installed.  A PS-32 can also fit, I have done one, but it is tighter fit and requires custom heat sink.

I can do this repair if you need a ASC to send to.  G

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