sd 70Ace truck

[ns737]

Hi,
Does anyone have a damaged SD70 Ace truck that is damaged, but has a good idler gear that they are willing to part with?  I have a good truck that I did a repair for someone that put the truck back together and lost one of the worm gear bushings.  That when he ran the engine, the worm destroyed the idler gear because it was missing the bushing.  I replaced his truck with a new one and I would like to get this truck back working, but you can't get the idler gear separately.  So, let me know if you have one and are willing to part with it.

[peteski]

Are you looking for the worm-gear (the gear which meshes with the worm)?  The topmost gear in this photo:


If yes, then PM me your address (hopefully you are in U.S. and I'll mail it to you (assuming that I find where I put that truck). 

[JSL]

If Peteski does not find it. I have one I can send you. PM me if needed.

[peteski]

I dug out the gear and cleaned off the lubricant. Now I see that the teeth are damaged by the worm.  Do you still want me to send it to you or maybe JSL's gear will be in a better condition?

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[ns737]

I will see what jsl has and let you know thanks.

[u18b]

I dug out the gear and cleaned off the lubricant. Now I see that the teeth are damaged by the worm.  Do you still want me to send it to you or maybe JSL's gear will be in a better condition?

(Attachment Link)

Dang.   That's not good Pete.

How did that happen, do you suppose?

[ns737]

I have seen it two many times. It looks like the the warms that have the metal bushing have this happen. kato now has the warms with plastic ones.

[peteski]

Dang.   That's not good Pete.

How did that happen, do you suppose?

Ron,
that truck was was from Glen Poole's locomotive. It was damaged and I simply kept it for parts.  I suspect that when the idler gears were partially jamming, the worm would sometimes skip teeth on that gear causing the damage you see in the photo. 

The full analysis of the truck's failure is in http://forum.atlasrr.com/forum/topic.asp?TOPIC_ID=65549&whichpage=2 (around the middle of the page).  It shoudl be a trip down the memory lane as you participated in that thread. 

[Bob Horn]

I have had several lock-up and push the gear train down on the truck. If you reverse direction it will go back into place, then press the lower half of the truck back in place. I have some where around 15 of these and only a couple of the early ones were trouble makers. Bob.