Re: Traction Motors

[Michael <mk@netstra.com.au>]

Hi,

Probably worn gears.

Regards
Michael

Gareth Lumsden said on 28-Sep-1999 in <Pine.SOL.3.96.990928025335.18255H
-100000@minyos.its.rmit.edu.au>: 

>
>All,
>
>What causes EMU traction motors of the same type/make to be noisier than
>others?  Often parts of the carriage vibrate which aren't meant to, as a
>result of "groaning" traction motors.
>
>Some of Melbourne's Comeng "groaner" motor cars currently are:
>302M
>338M (no 2 end bogie)
>350M
>503M (lead bogie)
>647M (no 2 end bogie)
>
>Noisier motors have no effect on performance or reliability, most cars
>listed above have been groaning for over a year.
>
>I can recall some V/Line locos which also used to have louded tm's than
>others of that class.
>
>I was always under the impression that bearing/s were tighter, but it
>was recently suggested to me that it has something to do with the coil.
>
>Does anyone know?
>TIA
>Gareth.