Need help in identifying this prewar O gauge motor.

Typically used in the 248 electrics.

Jon is correct, it will fit a 248 box cab loco, but it is later version. The 248 is a non-reversing loco. Note the 2 square holes at the top of the frame stamped out. This was for the manual reverse switch. It will also work with the 252 and 253 electrics. The disc wheels are from 1927 and later.

Thank you for your answers but what number is the motor?  It is a cross between a #6 and a #7?

RonH, It is purely a type 7 motor.  The 2001 Greenberg book is now out of date, the motor shown in 2001 as type 7  is now a type 8.  Now type 7 is the uncovered gear motor..1929-1930. Get the new O gauge books, Volume 1 is out... Vol 2 is coming the end of the year, Vol 3 next year.  Worth EVERY penny.

Thank you Rob, will invest in the new book volume one. Just curious on the motor types that were used on certain locos.  Have a old 250 shell and frame and will put this motor in, just want to be careful of the type of motor to the shell, have not gone though what frame is used.

Should work in the 250.

@Rob English posted:

RonH, It is purely a type 7 motor.  The 2001 Greenberg book is now out of date, the motor shown in 2001 as type 7  is now a type 8.  Now type 7 is the uncovered gear motor..1929-1930. Get the new O gauge books, Volume 1 is out... Vol 2 is coming the end of the year, Vol 3 next year.  Worth EVERY penny.

Has anyone heard from Bruce when he expects to release Volume 2 ?

RonH, to expand a bit on Rob's comments- if you have an early version 250 circa 1926 it most likely had a humpback in it. The later version circa 1934 should accept the type 7.  The early's are usually dark green and the laters orange or terra cotta. Agree with Rob, the new Greenberg book is well worth it, heck he helped write it.

Thanks John, I did pick up a bunch of junk engines at a train show in Edison NJ. One of them was. 250 with a humpback motor. Think it is a #5. It seems that all of these motors have the same frame mounting holes and could be interchanged. Looking add the new Greenberg book vol1 on my Christmas list. Even in my older book it still has. Lot of good information.

@mlaughlinnyc posted:

Has anyone heard from Bruce when he expects to release Volume 2 ?

Its coming.   The book is going through the proofreading process. Then it will get printed.  Its going to happen this year. By York? MMM Probably not, but by Christmas?  I should think so.

@Rob English posted:

Its coming.   The book is going through the proofreading process. Then it will get printed.  Its going to happen this year. By York? MMM Probably not, but by Christmas?  I should think so.

Thanks Rob.  That will go on the Christmas wish list that goes out to my family.  My three daughters nd sons-in-law will have to fight over which contributes how much to give it to me.