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Offline kfish2  
#1 Posted : 02 April 2021 03:47:36(UTC)
kfish2

United States   
Joined: 28/05/2020(UTC)
Posts: 12
Location: Colorado, Denver
I searched the forum (and the internet) for this, but not finding anything, I hope some of you can help.

I live in the US, but collect mainly German and Swiss prototype locos from Marklin. A few years ago, I saw the New York Central PA-1 at a swap-meet, and decided I needed to have at least one US train.

My engine runs well, but I want to open it up to do some maintenance, and I cannot figure out where the access screw(s) is/are. I removed several small screws from the bottom at the front and back, but they only seem to hold the trucks or some other small item in place. Does anyone know the secret? I thought that maybe there was a cover on the roof that could be removed to expose the screw, but the shell seems like one solid piece of metal.

Any hints or photos greatly appreciated.

Ken
Offline foumaro  
#2 Posted : 02 April 2021 05:57:37(UTC)
foumaro

Greece   
Joined: 08/12/2004(UTC)
Posts: 4,328
Location: Attiki Athens Greece
If you search the top of the locomotive you will find a little plastic cup,count 8 cm from the end of the locomotive.If you move this plastic part with a toothpick you can remove it and you will find the only screw you are will looking for.
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Offline foumaro  
#3 Posted : 02 April 2021 06:02:39(UTC)
foumaro

Greece   
Joined: 08/12/2004(UTC)
Posts: 4,328
Location: Attiki Athens Greece
39617.pdf (2,216kb) downloaded 25 time(s).
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Offline foumaro  
#4 Posted : 02 April 2021 06:06:36(UTC)
foumaro

Greece   
Joined: 08/12/2004(UTC)
Posts: 4,328
Location: Attiki Athens Greece
You will find the answer on page 25,it is the manual of the 39617 double Pennsylvania Alco,they are all the same.
Offline kfish2  
#5 Posted : 02 April 2021 06:15:27(UTC)
kfish2

United States   
Joined: 28/05/2020(UTC)
Posts: 12
Location: Colorado, Denver
Thanks very much for the information, and also the copy of the manual!

Ken
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Offline foumaro  
#6 Posted : 02 April 2021 08:11:03(UTC)
foumaro

Greece   
Joined: 08/12/2004(UTC)
Posts: 4,328
Location: Attiki Athens Greece
My pleasure.I am sure that she is your first Alco but not the last.ThumpUp
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Offline kfish2  
#7 Posted : 04 April 2021 07:43:14(UTC)
kfish2

United States   
Joined: 28/05/2020(UTC)
Posts: 12
Location: Colorado, Denver
I was able to get the shell off my PA1 thanks to the help here. I guess I have the oldest possible version of the PA1 because it looks to have an FX decoder, rather than MFX. It has sound, but the decoder has dip switches, and also small potentiometers for setting the max speed, and adjusting the momentum. It looks like the 6090x decoders. There is also a potentiometer on the 2nd board which I assume is a volume control for the sound board. If anyone knows which specific decoder is in here, I would appreciate knowing. I am having trouble setting the maximum speed, so I think the screws are in a different order than the 6090 which I am used to.

Offline foumaro  
#8 Posted : 04 April 2021 09:02:28(UTC)
foumaro

Greece   
Joined: 08/12/2004(UTC)
Posts: 4,328
Location: Attiki Athens Greece
alco UP.pdf (5,240kb) downloaded 5 time(s).
Offline foumaro  
#9 Posted : 04 April 2021 09:08:15(UTC)
foumaro

Greece   
Joined: 08/12/2004(UTC)
Posts: 4,328
Location: Attiki Athens Greece
Your Alco 29570 and models 37610,37611 have fx decoder,37612,37613,39617,26490,26495 have mfx decoders.In the previous post you can download the booklet of 37610,if the decoder is similar you will find the answer on page 26.
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