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MPC Southern Crescent Repair ?

Matthew B.Matthew B.OGR Forum Member

I’m putting together a Lionel Southern Crescent from the MPC era; Cab # 8702.

In the Lionel supplement 1-9, Diagram 3-31, I noticed a return spring (item 36, part #8600-20)  that appears to go on the smoke unit lever. There wasn’t one on my engine when I received it. Thinking the missing spring may be the reason the engine doesn’t smoke as well as I’d like it to, I ordered one from The Train Tender. Now after taking the engine apart I can’t figure out how the return spring works or how to install it. If anybody has a clue, it sure would be appreciated?

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Matthew B.Matthew B.OGR Forum Member

Thanks for the reply GGG.

 

I don't think we're talking about the same spring. The return spring is more like a hair pin type. My thoughts were that it afixed inside  the steamchest somehow looped around the lever and then went back to a block attached to the rod on the front of the crosshead. But that was just my guess from examining the exploded view of the engine. 

ADCX RobADCX RobOGR Forum Member SUPPORTING MEMBERDIGITAL SUBSCRIBER

The 8600-20 spring might not be needed if the right side crosshead pulls the smoke lever bellcrank(and the piston down) on the backstroke.

 

The "s" hooks around the smoke lever bellcrank and the offset hook inserts into a hole in the motor frame.   A 2026-44 spring can be placed on top of the piston to do the same job.

 

The MPC steamers were not known for prolific smoke production.

Matthew B.Matthew B.OGR Forum Member
Thanks Rob, I think you've filled in the missing piece of the jigsaw puzzle. I know you're right about the MPC era steamers not being prolific smokers and even though I'm of the thought there's no such thing as too much smoke, I still enjoy the waving effect presnted by these engines as they puff the smoke out the stack.
 
 
Originally Posted by ADCX Rob:

The 8600-20 spring might not be needed if the right side crosshead pulls the smoke lever bellcrank(and the piston down) on the backstroke.

 

The "s" hooks around the smoke lever bellcrank and the offset hook inserts into a hole in the motor frame.   A 2026-44 spring can be placed on top of the piston to do the same job.

 

The MPC steamers were not known for prolific smoke production.

 

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