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RailPro => Finished RailPro Installation Examples => Topic started by: LVRR1856 on May 14, 2026, 08:58:18 PM

Title: GP-30 Proto2000
Post by: LVRR1856 on May 14, 2026, 08:58:18 PM

Rolling right along - just bought a pair of NOS - P2K GP30's. They were still new in box, never opened.
Of course to be expected on both engines - all 4 wheel gears were cracked. I can change these out in minutes now.
I buy packs of either red or black gears - reuse the old wheels. The Walthers sets are like $7.50/pair ($15/loco).
Just using new gears, can do for about $4/loco.

I pull off the old resistor board, popped in a new set of LEDs with built in resistors, rewired into the 8 pin plug, just a minor file down of the nibs
on the weight where te screws were for the board. LMS-3S set in there nicely along with 9 to 8 harness on one end. (used 1" version).

13mm x 18mm x 3 mm speaker and box from Crude - engineering, fit onto of rear light notch.

No cutting required.

I did run into a short problem. There was a tiny bit of corrosion on top of the 8 pin plug, after several other attemps to fix, finally found it.
scratched it up and cleaned with Isoprop Alcohol ... fixed it. Must have been a reaction from old flux ... good now.

Runs great. Number 2 will get just a LM3 no sound ...

Title: Re: GP-30 Proto2000
Post by: Espeelark on May 17, 2026, 05:15:49 PM

Sounds very cool!
Can you post a photo (or two) of the install?
Thanks!

Title: Re: GP-30 Proto2000
Post by: LVRR1856 on May 18, 2026, 07:48:14 PM

Hi Espeelark,
There is a few pics there in my first post ... can you see them ?

Anyway here is my second GP-30 - P2k, even easier - no Sound, I used a LM3, a Digitrax 1" - 8 to 9 pin harness, and 2 LED bulbs with built in resistors. No cutting or soldering. Light filing the screw hole nib for old circuit board.

Just wired the LEDs into the P2K 8 pin top part of the plug with the little push on caps. I timed myself on the lights - about 7 minutes, strip wires,
twist, and cap ... they work great.

Ran it with the other unit - consist works great.

Title: Re: GP-30 Proto2000
Post by: Espeelark on May 19, 2026, 12:47:05 PM

Sorry about that - couldn't see that there were attachments when using my "smart" phone.  ::)
Nice work there - thanks!

Title: Re: GP-30 Proto2000
Post by: LVRR1856 on May 24, 2026, 12:18:10 AM

No worries Espee, these were the easiest converts, no milling required. I was surprised.

I did sand the speaker baffle a tad also. Those we Cruse Engineering sugar cubes 13 x 18 x 5mm ... I sanded them down to like 3 mm thick.

Fun fun fun, I get a thrill making them Railpro savvy. - Good times.