Steam & Excursion > ATSF 2926 Work Update Week Ending 07/26/2014

The temperature in ABQ hit the century mark on Saturday but the intrepid volunteers worked on in the heat. A member of the 3751 team was in town for the week and was hosted by CMO Kirby. He will be assisting the crew in the areas of the foam and feed water flow meters, as well as electrical upgrades to the brake stand. To that end the two foam meter probes were removed, tested and found to be acceptable.

Machine shop work included near completion of the crosshead tramming device and fabrication of lubrication fittings. A volunteer in Indiana fabricated some recirculating water pump parts and various other lubricator fittings. Also from out of town, the group received threaded ball replacements for the 29 replacement staybolts from Strasburg. The locomotive was moved for the first time over the new concrete crossings completed last week.

And, as usual, fabrication of superheater tube bundles continued, together with more grinding for replacement flexible staybolt sleeves, and removal, cleaning and painting of various parts.

2926 merchandise will have a new home when work on a permanent enclosure is completed in a few weeks.

http://nmslrhs.org/Status/status.php?week_no=201430

Photos show the foam sensor probes and the current sensor box whose innards will be replaced. A myriad of gauges are pictured and fabrication of a superheater bundle is shown.

http://nmslrhs.org/Photos/2014/07-26/index.html

Sales of superheater tube pairs are at 130 with just 90 left for a donation of $100 per pair.

http://nmslrhs.org/Shop/Superheaters/superheaters.php

First photo is of the cab gauges; the second and third pictures are of the foam sensors and the sensor box (go to this week's photos for a complete description of items in the pictures).



Edited 2 time(s). Last edit at 07/29/14 19:25 by Cumbresfan.

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How does a foam sensor work?

tomstp Wrote:
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> How does a foam sensor work?

Good question - my guess would be the foam would complete an electrical circuit if it is detected. I use a water level meter in my work that operates that way. Dissolved minerals in water complete the circuit when the top of water in a well is reached. The water level meter has a sensitivity control as droplets of water (pipe condensation for example) can give a false reading if the probe is set for high sensitivity.

Looking forward to the open house in Sept.

Posted from Android

In operation, when the foam reaches to midpoint of the short electrode, the yellow light on the box in the cab comes on and the automatic blowdown opens. When it reaches that point on the long one, chances are you got problems. Try blowing the whistle. Also the red light comes on.
I would be careful putting them in a vise.



Edited 1 time(s). Last edit at 07/31/14 07:17 by Frisco1522.