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GP 30 problem

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  • Member since
    September 2004
  • From: Dearborn Station
  • 24,280 posts
Posted by richhotrain on Tuesday, September 13, 2016 5:07 PM

jacon12

I have a new Walther's Proto Gp 30 dcc sound that I'm having a problem with.  When I first bought it from an Atlanta area shop (new) there was no power to the rear truck.  I sent it to Walther's (I'm 125 miles from the store) for exchange, at my expense.  I received it back yesterday.... tried it out and this one has power to both trucks but it is stalling on 95% of the frogs of my Peco code 100 insulfrog turnouts.  Out of 25 plus locomotives in my fleet it is the only one to do this.  

Are you sure that there is power to both the front and rear trucks on both the left side and the right side?

I am not familiar with the Code 100 Peco Insulfrog, but I do know that the frog on the Code 83 Peco Insulfrog is plastic. Assuming that the frog on the Code 100 Peco Insulfrog is also plastic, there is no way to power it, so it is crucial that both the front and rear trucks are receiving power. So, if this is the only loco out of 25 to stall on the frog, it sure sounds as if either the front or rear truck is not receiving power from the rails.  

Does the loco only stall at slow speeds? I ask that because even with power to only the front or rear trucks, at higher speeds the loco can coast over an unpowered frog.

Rich

Alton Junction

  • Member since
    September 2004
  • From: Dearborn Station
  • 24,280 posts
Posted by richhotrain on Tuesday, September 13, 2016 4:57 PM

Ed, I'm confused about your comment on Walthers repairing the drive-shaft/worm gear. I don't see where the OP mentioned anything about that. Also, he bought the loco new and then exchanged it at Walthers for another new one.

I do agree that it sounds like one of the power pickup wires is broken or missing, but even that seems coincidental on two consecutive new loco purchases. The OP should follow your advice and check both the front and rear trucks for power.

Rich

Alton Junction

  • Member since
    August 2003
  • From: Collinwood, Ohio, USA
  • 16,367 posts
Posted by gmpullman on Tuesday, September 13, 2016 4:16 PM

jacon12
 I received it back yesterday.... tried it out and this one has power to both trucks

I am a little confused about the way you are saying that there is power TO the trucks.

To me, power to the trucks is implying that the wheels are not turning so the original problem was a drive shaft or worm gear dislodged so that only two out of four axles were turning.

Is this correct?

The stalling may imply that there is no power pickup from one truck. That would be a different condition all together.

You can test this by running the locomotive at a moderately slow speed while carefully lifting one truck, then the other, slightly off the rails.

If the wheels stop turning when you lift one end off then the remaining truck is not collecting power and there might be a broken wire or a problem with the bronze contact strip.

It is entirely possible that when Walthers repaired the drive-shaft/worm gear to the truck the repair person dislodged one of the connecting wires from the truck or the printed circuit board.

A little more information might be helpful.

Regards, Ed

  • Member since
    November 2002
  • From: US
  • 4,648 posts
GP 30 problem
Posted by jacon12 on Tuesday, September 13, 2016 4:06 PM

I have a new Walther's Proto Gp 30 dcc sound that I'm having a problem with.  When I first bought it from an Atlanta area shop (new) there was no power to the rear truck.  I sent it to Walther's (I'm 125 miles from the store) for exchange, at my expense.  I received it back yesterday.... tried it out and this one has power to both trucks but it is stalling on 95% of the frogs of my Peco code 100 insulfrog turnouts.  Out of 25 plus locomotives in my fleet it is the only one to do this.  I've checked the wheel guage with an NMRA guage and they are correct.  I've measured the width of the wheel thread and I find that, from the wheel flange but not including it, they are 5/64th inch wide, just as another locomotive that I measured that does not have this problem.

What am I missing?  What can I check?

Thanks in advance.

Jarrell

 HO Scale DCC Modeler of 1950, give or take 30 years.

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