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AB Air Brakes
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Paul Hillman
I think this was asked before, but what data is usually printed on the AB air-tank? I can't find a photo on the net anywhere. Thanks, Paul Hillman |
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Richard Hendrickson
On Feb 1, 2014, at 7:47 AM, chris_hillman@... wrote:
Paul, brakes were serviced more or less annually, like truck journal repacking, and the railroad, location, and date were stenciled on the reservoir or reservoir mounting. Richard Hendrickson |
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Tony Thompson
Richard Hendrickson wrote:
Most lettering drawings for railroads will say something like "stenciling to conform to instructions shown in Interchange Rule No. 60." Maybe Guy WIlber or someone can quote that rule for us. Tony Thompson Editor, Signature Press, Berkeley, CA 2906 Forest Ave., Berkeley, CA 94705 www.signaturepress.com (510) 540-6538; fax, (510) 540-1937; e-mail, tony@... Publishers of books on railroad history |
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Paul Hillman
Thanks Richard,
Someone sent me the 1946 & 1952 AAR Code of Rules on lettering the air
cylinders. I model 1950 and it showed the info as you mentioned and the diagrams
for it.
Paul Hillman
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Paul
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Here's a prototype lettering document you can buy http://www.nwhs.org/archivesdb/detail.php?ID=13677 Found it with Google Image search. Tim O'Connor I think this was asked before, but what data is usually printed on the AB air-tank? I can't find a photo on the net anywhere. |
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Guy Wilber
Richard Hendrickson wrote:
"Paul, brakes were serviced more or less annually, like truck
journal repacking, and the railroad, location, and date were stenciled on the
reservoir or reservoir mounting."
"AB" brakes were required to be serviced every 36 months
under the provisions of Interchange Rule 60. That service interval was a
standard from 1934 until extended to 48 months by supplement to the 1958
Interchange Rules. "K" brake systems were required to be serviced every 15
months. I would have to look up the exact date that the service
increment was extended to 15 months, but early on the interval for "K"
brakes was every 12 months. The 15 month interval was in effect
from (at least) the early 1930's into 1953. All references to "K"
brakes were taken out of the Interchange Rules, effective January 1,
1960.
Prior to servicing the brake system the stenciled
data applied when cars were new, or after the last service date, was recorded by
the current servicing railroad for use in billing the owning railroad.
Once cleaned, oiled and tested; all old stenciling was to be scraped away,
painted over, and new stencils were to be applied as such; railroad shop
initials, date (m-d-yr) and the servicing railroad's reporting marks.
Shop initials and the date was on the left side of the
"AB" combined reservoir and the RR reporting marks were on the
right. The shop initials and date were stacked over the RR reporting
marks if placed on the end of the reservoir, they were stacked in the same
manner on the smaller air reservoir of "K" brakes.
This was standard practice from the introduction of the
"AB" brake system thru 1959. Stencils for brake components were 1" in
height until 1938 when they were changed to 1-1/2" in height.
Any brake application in which the
reservoir was obscured by deep side sills generally had the COTS
information stenciled on the side of the car where the reservoir was mounted
and placed as closely to the air release rod as possible. It was also
permitted to stencil the information on the center sill of tank cars as spillage
of commodities often obscured the stenciling unless protected by cover
shields.
Guy Wilber
Reno, Nevada
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Tony Thompson
Back on February 7, Guy Wilber posted a very helpful summary of the brake servicing rules, taken from Interchange Rule 60. With Guy's permission, I have incorporated his summary into a blog post about modeling the stenciling on freight cars for brake service. If you're interested, here is a link:
Tony Thompson Editor, Signature Press, Berkeley, CA 2906 Forest Ave., Berkeley, CA 94705 www.signaturepress.com (510) 540-6538; fax, (510) 540-1937; e-mail, tony@... Publishers of books on railroad history |
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