Author Topic: screeching sound when putting shell on athearn BB sd40-2  (Read 788 times)

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h2w

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screeching sound when putting shell on athearn BB sd40-2
« on: February 01, 2015, 05:31:02 PM »
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hello I have an older blue box sd40-2 that I have repainted, tuned up including hard wiring, before I put the shell backon the chassis runs great, little noise.
after I put the shell back on there is an loud screeching sound more so in one direction. when I took off the shell again the front wire had a small flat spot as if the flywheel was rubbing against it. so I folded the wires and put the shell on same noise. so any ideas do the wires need to be shortened? also the wire in the front I soldered it to the end of the tab would this make it bind when the shell is on?
« Last Edit: February 01, 2015, 05:32:51 PM by h2w »

tom mann

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Re: screeching sound when putting shell on athearn BB sd40-2
« Reply #1 on: February 01, 2015, 08:47:08 PM »
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Could it be that brass headlight holder?  It looks like it is rubbing the flywheel.

h2w

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Re: screeching sound when putting shell on athearn BB sd40-2
« Reply #2 on: February 01, 2015, 10:32:49 PM »
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yeh I belive that was the problem after I made the original post I took the light bulb holder out and also reposition the wire on the tab tried it with the shell on works good,
thanks
 mark

Chris333

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Re: screeching sound when putting shell on athearn BB sd40-2
« Reply #3 on: February 01, 2015, 11:42:29 PM »
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That headlight contact that is touching the flywheel, bend it down so it loops around and touches the truck contact.

Ike the BN Freak

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Re: screeching sound when putting shell on athearn BB sd40-2
« Reply #4 on: February 02, 2015, 12:04:18 AM »
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You can see where the brass headlight contact was rubbing on the flywheel

h2w

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Re: screeching sound when putting shell on athearn BB sd40-2
« Reply #5 on: February 02, 2015, 12:31:10 AM »
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ugh now a new problem, the engine runs smooth and quiet , now the lead truck doesn't take the 22" curve like it had the wheels come off the tack like the truck is not able to swivel correctly errrrr that needs to wait til tomorrow.
mk