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Hi Vic, great suggestion.??? I agree there seems to be some play in the armature.?? ?To get the washers onto?the motor shaft ?I believe ?I must take the motor apart, which I have never done before.? I have a number of similar motors in other locos and I'm excited by the prospects for improving them too. I've done a web search for this process but haven't found much. I think I will need to un-solder the worm from the shaft, then unscrew the top and bottom motor plates to release the armature? Is there a risk of losing power from the magnet if the motor is opened up like this ?? Any tips for handling the magnet? The motor is a straight-pole Bowser design, not the newer skewed pole, so I assume it has an Alnico magnet? Thanks.. Fred Hanes, San Jose, CA On Tuesday, March 20, 2018 7:59 AM, "Victor Bitleris bitlerisvj@... [yardbirdtrains]" wrote:
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I suspect that the armature has play.? When in reverse, it is pushed toward the magnet and all play is gone.? When in forward, I bet the armature goes back and forth.? If that is the case, you may be be able to use the
Kadee fiber washers to shim it.
This is a pretty common occurrence in Mantua motors as well.
Vic Bitleris Raleigh, NC
From: yardbirdtrains@... on behalf of fred_hanes@... [yardbirdtrains]
Sent: Monday, March 19, 2018 12:32 AM To: yardbirdtrains@... Subject: Re: [yardbirdtrains] Bowser DC-71 new motor noise ?
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Hi Group thanks for all the great tips.
The Bowser motor by itself now runs pretty quiet..
With the motor attached to the chassis and the basic drive train assembled, I get noise going forward but almost silence in reverse.
I've tried shim washers under the motor to change the gear mesh but no big changes in noise.? Should I try washers under both the front and rear motor mounting points at the same time?
Maybe noise is coming from the axles turning in the bearings?? I see some play when the wheels are turning.
I wish I had a nice power supply setup with a current meter, maybe down the road.? For now I'd be happy to tune the motor by ear so that the noise forward equals the noise in reverse,
Any tips?
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