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Hi guys,

I have an older TMCC Lionel SD40, specifically the CNJ SD40-2 (6-28224) from 2004. I need to change a side frame and a traction tire. I was wondering if any of you had any easy ways to get at the screws for the side frames. They seem pretty far underneath the body and even turning the trucks as far as they go it only makes one screw available on each side. Is there an easier way to get at them? Do I have to take off the shell to get at them?  Thanks in advance!

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gunrunnerjohn posted:

I guess I'm confused.  Aren't the screws for the sideframes inside the trucks between the wheels?  If the screws go in from the top, you will have to drop the trucks, that means taking the shell off.  I don't remember which side they are on for this model.

That looks like the correct truck. OK, so I have to go through the shell I guess. I thought on some of these models you can turn the truck to a point and they would drop down so you didn't have to remove the shell. Just was wondering if this particular loco was one of them.

Coopertroopa posted:
gunrunnerjohn posted:

I guess I'm confused.  Aren't the screws for the sideframes inside the trucks between the wheels?  If the screws go in from the top, you will have to drop the trucks, that means taking the shell off.  I don't remember which side they are on for this model.

That looks like the correct truck. OK, so I have to go through the shell I guess. I thought on some of these models you can turn the truck to a point and they would drop down so you didn't have to remove the shell. Just was wondering if this particular loco was one of them.

Saw that at a local hobby shop on an F unit, think it is a later production change. (Of course on the older engines just having the side frame screws be installed from below would have eliminated most of the problems...) Anyone know if current production diesel units have a "Twist and Drop" truck assembly?

Last edited by BobbyD

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