K-36 / 37 Lead Truck Part Drawings

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davidqueener
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K-36 / 37 Lead Truck Part Drawings

Post by davidqueener »

Gentlemen,

I am helping an acquaintance with the lead and trailing trucks for his 1:20th scale Uintah mallet. We are convinced from the elevation and section drawings that the lead truck on the Uintah 2-6-6-2T is practically indistinguishable from the lead trucks on the D&RGW K-36 and K-37, so I am attempting to create a 3D CAD model of the latter in SolidWorks. I am using D&RGW engine truck assembly drawing #10817.

This assembly drawing calls out a couple of part drawings, namely #15444 for the frame & bottom rocker seat; and #15445 for the bolster and top rocker bearing. So far we have had no success locating either at the Denver Public Library Western History Collection or the Colorado Railroad Museum's archives.

Would any of you guys have either of these drawings, or for those of you who have built your own K-36 or K-37, do you have any sketches of these particular parts you could share?

Thanks for your help,

Dave Queener
Knoxville, Tennessee
Pastor, St. Paul Presbyterian Church
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davidqueener
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Re: K-36 / 37 Lead Truck Part Drawings

Post by davidqueener »

So far I have traced the lead truck frame from drawing 10817 as best I can. That is no substitute for the frame part drawing, but it will have to do. Here's what I have come up with so far in SolidWorks, inclusive of the pedestal liners:
K-36 & 37 Lead Truck Fame (3Q).jpg
And here are two pics of the prototype:
AMP03-134.jpg
K-36 Lead Truck (1975) 3.JPG
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Pontiacguy1
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Re: K-36 / 37 Lead Truck Part Drawings

Post by Pontiacguy1 »

Hope you find what you need. Your drawing looks great.
Ironflyer
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Re: K-36 / 37 Lead Truck Part Drawings

Post by Ironflyer »

Yep, that sure looks the part, I hope it comes out well for what you guys are after, nice job.
Best,
Paul
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Re: K-36 / 37 Lead Truck Part Drawings

Post by Glenn Brooks »

Dave, what do the two holes do in the outer, top edge of the casting? Iam guessing they might be lube openings for the bearings??

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Re: K-36 / 37 Lead Truck Part Drawings

Post by Ironflyer »

Hey Glenn,.. David might've dug that far...he does some nice work,
in the images I sent him of my prints, beneath those holes in the casting are what become locating or centering bosses for the springs above the journal boxes...
All the Best,
Paul
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davidqueener
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Re: K-36 / 37 Lead Truck Part Drawings

Post by davidqueener »

Hi Glenn,

I tired to draw every feature from the prototype general arrangement drawing, and it shows a boss which the two pedestal springs nest around. I am not sure why it was made to have a hole, since I expect lubrication would be needed on the surface of the pedestal liners, not the springs. Maybe someone more knowledgeable than myself could chime it.

Here's a sectioned screencap of my lead truck frame:
K-36 & 37 Lead Truck Fame (3Q Section).jpg
--Dave Q
Pastor, St. Paul Presbyterian Church
www.StPaulPres.com (865) 209-5654

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davidqueener
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Re: K-36 / 37 Lead Truck Part Drawings

Post by davidqueener »

Gentlemen,

I have nearly finished my SolidWorks model of the K-36 & K-37 lead truck. Here's where I am as of today:
Attachments
K-36 & 37 Lead Truck Assembly 1.1 (9-21-22).jpg
K-36 & 37 Lead Truck Assembly 1.2 (9-21-22).jpg
K-36 & 37 Lead Truck Assembly 1.3 (9-21-22).jpg
K-36 & 37 Lead Truck Assembly 1.5 (9-21-22).jpg
Pastor, St. Paul Presbyterian Church
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davidqueener
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Re: K-36 / 37 Lead Truck Part Drawings

Post by davidqueener »

What I lack is the lid for the 5x9 journal boxes on the truck. I have good mechanical drawings for a McCord pressed steel lid of 1902 vintage, but I do not seem to have any for the peculiar, bulging lids used on the majority of these trucks. Does anyone have a blueprint he could share with me? I'll attach a few pics of the prototype below.

Thanks!

Dave
Attachments
file (2).jpg
file.jpg
K-37 Lead Truck (1).JPG
K-37 Lead Truck (2).JPG
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Berkman
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Re: K-36 / 37 Lead Truck Part Drawings

Post by Berkman »

Didn't someone build a couple 2.5 in scale K36s? Maybe they could be reached with drawings. Somehow I doubt the dimensions are the same between the mallet and k36 lead truck, but perhaps very similar designs.
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Re: K-36 / 37 Lead Truck Part Drawings

Post by Sandiapaul »

Dave,

Maybe ask over on the Narrow Gauge Discussion Forum? Show your progress and see if anyone can help.
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Re: K-36 / 37 Lead Truck Part Drawings

Post by davidqueener »

The lead truck on the Uintah mallet and the D&RGW K-36 appear to be very similar designs, both coming from Baldwin built locos in the 1920s and made by Commonwealth Steel Castings. There are no known part or assembly drawings for the Uintah mallet, so the best one can do is trace the elevation and section drawings and compare with the D&RGW lead truck assembly drawing. And compare photos, as well, of course. Here's a few pics of the Unitah truck:
Attachments
BLW Uintah 2-6-6-2T Lead Truck Elev..jpg
BLW Uintah 2-6-6-2T Lead Truck Section.jpg
Uintah #50 Lead Truck 1.jpg
Uintah #50 Lead Truck 2.jpg
Uintah #50 Lead Truck 2.jpg (7.81 KiB) Viewed 3398 times
Pastor, St. Paul Presbyterian Church
www.StPaulPres.com (865) 209-5654

Owner, Cumberland Model Engineering
www.CumberlandModelEngineering.com (865) 947-7935
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