What makes the 1946 version of the 726 Berk different from the '47-'49 versions?

Just wondering, Why is this version so special? I know how its looks differ from the later versions, but what is so different about the mechanics, if any, and why did Lionel immediatly change the engine in its later years of production? Did they start cutting corners in '47 to save money?

Yes, I think Lionel did, to save money, I have (2) 1947 versions and (1) 1946 version of the berkshire. The 726’s are nice. The 1946 model has the bigger atomic large field motor, sometimes with the red brushplate. And they have a horizontal motors and e-units. The e-unit has no lever like the 1947 model does. They 1946 versions have the bulb type smoke unit, and many other small details that make it unique. they go for a good amount in good shape. Thanks.

You’re very lucky Lionel2. That engine is on my wish list. Are the large atomic motors more powerful than regular motors? And how good does the '46 version run compared to the '47 models? Is there any difference?

The 1946 has a different body casting, the pre-war 226E, and just a one year run, few are out there.

The '46 Berk gives you Stantions holding the hand rails (47 and later uses Cotter Pins), an opening around the Valve Gear Hanger for more visual impact, some added hand rail piping (47 and later it’s cast in), and a double worm drive (47 and on single).

The 726 from 1946 to 1949 had nickel rimed Baldwin Disc drivers (better looking but no Magne-Traction), and a large Die-Cast Tender based on the pre-war 2226W used on the 226, 726 Berkshire, 763 Hudson, and 773 Hudson. (a $200 + item)

1950 and on Berkshires have Plastic Tenders, Magne-Traction, and carry the number 736. Note the 1952 “726RR” is a 736 without Magne-Traction.

Great info for someone interested in knowing more about a loco they lust after and may someday own. Thanks.

Jack