A Real Dirty Job

Where users can chronicle their builds. Start one thread and continue to add on to it.

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Carrdo
Posts: 1167
Joined: Thu Mar 06, 2003 2:20 pm
Location: Toronto, Canada

Re: A Real Dirty Job

Post by Carrdo » Thu Dec 12, 2019 1:57 pm

Pressing on, I first hand held and carefully roughed out the offset brake hanger outlines by band sawing followed by belt sanding. These parts become very trick to hold at this point so proceed carefully.

Followed this by my " favourite" rotary milling operation - end rounding both ends of a hanger down to its finished size of 1/4". Again, lots of concentration needed and take only light cuts with a sharp end mill.

To finish the centre I beam section, another simple holding fixture needs to be made as, due to the hanger offsets, one cannot simply clamp these parts directly in the vise as was done previously with the straight hangers.

To be continued.
Attachments
369 The Roughed Out Offset Brake Shoe Hangers after Bandsawing and Belt Sanding.jpg
370 End Rounding an End of an Offset Brake Hanger.jpg
371 After End Rounding.jpg

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Carrdo
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Joined: Thu Mar 06, 2003 2:20 pm
Location: Toronto, Canada

Re: A Real Dirty Job

Post by Carrdo » Fri Dec 13, 2019 12:27 am

The final machining and assembly of the brake assemblies.

The first three photos show the simple holding fixture made and the fixture in use to machine the I beam centre sections of the offset brake hangers.

The final fitting of the offset brake hangers was a problem due to the hanger offset interfering with the swing of the brake shoes. It required filing a notch in each of the hangers as shown in the fourth photo to allow them to swing just as freely the original straight hangers did in the brake shoes. Nothing here was going to go down without a fight.

Finally, it all went together. Everything now is in alignment, is free to move and the entire brake assemblies work as designed and as shown on the Langworthy/Yankee Shop drawings.

It only took a mere ...!!!
Attachments
372 The Disassembled Offset Brake Hanger Holding Fixture.jpg
373 The Assembled Offset Brake Hanger Holding Fixture.jpg
374 Milling the Centre I Beam Section of an Offset Brake Hanger.jpg
375 The Finish Machined Offset Brake Hangers.jpg
376 The Final Fitted and Aligned Brake Assemblies.jpg

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Carrdo
Posts: 1167
Joined: Thu Mar 06, 2003 2:20 pm
Location: Toronto, Canada

Re: A Real Dirty Job

Post by Carrdo » Wed Dec 18, 2019 3:27 pm

Some newly machined brake linkages for the engine.

The lead truck reinstalled.

This locomotive has had the h..l run out of it. The locomotive is still very dirty and needs a good steam cleaning all over which it hasn't had yet.
Attachments
377 Some Newly Machined Brake Linkages.jpg
379 The Lead Truck Reinstalled on the Locomotive.jpg
380 The Dirty Side of the Engine.jpg

Pontiacguy1
Posts: 1000
Joined: Thu Apr 26, 2012 10:15 am
Location: Tennessee, USA

Re: A Real Dirty Job

Post by Pontiacguy1 » Wed Dec 18, 2019 4:02 pm

Those are the best ones... The ones that have had the crap run out of them, that is. At least they've been run and enjoyed by someone, doing what they were meant to do. A shelf-model or museum piece always seems a little bit sad to me for some reason.

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Carrdo
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Joined: Thu Mar 06, 2003 2:20 pm
Location: Toronto, Canada

Re: A Real Dirty Job

Post by Carrdo » Wed Dec 18, 2019 11:27 pm

The new brake linkages installed.
Attachments
381 The New Brake Linkages Installed.jpg

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Carrdo
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Location: Toronto, Canada

Re: A Real Dirty Job

Post by Carrdo » Sat Dec 21, 2019 6:45 pm

I went back to the 4 wheel trailing truck to make some additional items.

On the trailing truck rockers, the Langworthy drawings say nothing about the rocker bearing plate projections which are needed to constrain rocker movement.

I do have a book which shows this in a drawing but with no dimensions. As a result, I just sketched up some paper templates as per what was in the book. We will see if my eyeball engineering was any good when I try and put it all together.

To make the rocker bearing plate projections themselves was an exercise in band sawing followed by some heavy duty belt sanding to achieve the final projection contours.

I still have to grind down the projection plates to be a free fit in the 3/32" slots in the rockers themselves.
Attachments
382 Forming the Rocker Bearing Plate Projections.jpg
383 The Rocker Bearing Plate Projections After Forming.jpg

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Carrdo
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Location: Toronto, Canada

Re: A Real Dirty Job

Post by Carrdo » Sun Dec 22, 2019 5:05 pm

The rocker bearing plate projections set in the slots of the rockers.
Attachments
384 The Rocker Bearing Plate Projections Set in the Rocker Slots.jpg

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