This motor, used on large MTH Premier Steam Engines is no longer available. Does anyone know if MTH has a replacement motor?
This motor takes a 30mm flywheel and is used on the Premier Northern, 20-3078-1.
Bruce
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Lionel sells 9434s and you can find them on ebay. Lionel also has flywheels that fit. You may hear from some forum members as well.
Pete
See your email. 
Out of curiosity, is this the same motor/flywheel used on the MTH Premier S1? I know Lionel is doing a 50 percent off sale this weekend, maybe I can dig up some parts for my unfinished loco.
@Jeff_the_Coaster_Guy posted:Out of curiosity, is this the same motor/flywheel used on the MTH Premier S1? I know Lionel is doing a 50 percent off sale this weekend, maybe I can dig up some parts for my unfinished loco.
Yes, the correct part no. for the Pittman motor in an S1 would be 9434J434....however, it does not have to be that exact part no.....you can use a variety of 12 volt motors available from Lionel or off the bay...you just have to know what you’re buying. Not all 12 volt motors are created equally. As long as you get a motor SIMILAR to characteristics to the J434 model, it will work with PS2/3 ....and knowing if the motor will fit in the cab is handy too....
Pat
Pat, I run only conventional (yes, even with PS2 boards), so would it make sense to use the motors rated for 15.1V? In looking at Pittman's site, it's difficult to correlate the "JXXX" to the motor using the "DC040B" series parts, but my best guess is that the "34" in the "J434" designation is the magnet length of 3.353 (or 3.4) inches, thus the "34" in the designation. It seems that terminal voltage really can be anything up to 48V, and that the "15.1V" or "12V" denominator is just a sort of quick reference and not a rating or a limitation (so not really of consequence?). I'm used to big AC motors on roller coasters, but don't deal much with small DC motors like these.
So if I was using Pittman's part numbering, it would be a DC040B-6, but still not sure what the "J" and the other "4" designate.
I am thinking I would like to use the largest motor that would fit, and if a DC040B-6 is 3.353" long, then that's the J434 motor. Does that seem right? Then I could use this as a baseline to see what motors Lionel has on sale this weekend, and order a replacement accordingly even if it's not the 434.
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Basically any Pittman 9434, 12V or 15.1V, should work fine. I've run 15V 9434 Pittman motors with PS32 boards without issue. @harmonyards and myself are currently using a 12V Pittman 9234 variant in our builds to replace missing 9434s, but due to the case design they require some mods to work. 9234s and 9434s are basically identical electrically and functionality wise. 9434s have a brush plate with solder lugs, 9234s have a brush plate with built in wire leads. Here's a 9234 that Lionel has available that should be a direct drop in to replace a 9434:
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Lionel has the complete motor w/mount and 33.7 mm flywheel available. Time from placing the order to delivery was quick. p/n is: 620-8011-103. Will test run soon.
Bruce
sounds good let me know how you make out Bruce with the motor replacement!
Alan
@bruce benzie posted:Lionel has the complete motor w/mount and 33.7 mm flywheel available. Time from placing the order to delivery was quick. p/n is: 620-8011-103. Will test run soon.
Bruce
Use the MTH motor mount, not the Lionel one.
I have a Premier FEF. You may have a bit of trouble fitting that 33mm flywheel in there. The 30mm one is tight as it is.
