The 24 RL automatic brake valve has "release", "running", "first service",
"lap", "service", and "emergency" positions, as shown at the following
link--scroll about 2/5 down--
http://cqpa.steelvalleywebdesign.com/gp9manual/GP9_Section1.htm
As does the 6 SL.
There is quite a discussion on automatic brake valves over on trainorders.com,
where different brake valves are explained--
http://www.trainorders.com/discussion/read.php?10,686013
And yes, after making a service reduction, one does move the brake valve back
to "lap" position on all except the modern-day 26L, 30CDW, and electronic brake
valves. Or one can let the brake pipe vent through the valve down to zero psi.
Found that reference to the whistle signal just where you noted it,
Vic--thanks. It appears that the 1962 UCOR made things a little simpler and
"user-freindly" than the 1951 version.
Steve Lucas.
--- In cpsig@xxxxxxxxxxxxxxx, "Jeff Pinchbeck" <jpinchbeck@...> wrote:
Moderatorâs error. Reposted on behalf of Vicâ¦
In the days of no speed limits (psgr trains) brake valves didn't
have a "service" position as I recall. 26L brake valves were yet to
come along.
You would have been moving a 24RL back to "lap" position! And
as for no 1951 UCOR § 14(m), check 1951 UCOR § 31 last para; same
thing is there.
VRP
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