[PRCo] Re: PCC Brake Valves

[Boris Cefer]

Honestly, I don't know much about the air components. But it was around 1948 
when PRCo started to extend dynamic brakes on its air cars.

B

----- Original Message ----- 
From: "Fred Schneider" <fwschneider at comcast.net>
To: <pittsburgh-railways at dementia.org>
Sent: Wednesday, May 30, 2007 8:30 PM
Subject: [PRCo] PCC Brake Valves


> FORWARDED TO DAVID HAMLEY BY BLIND CARBON FOR HIM COMMENTS ON THE
> REWIRING PROGRAM:  DAVE, IF YOU ADD ANYTHING, I'LL POST IT
> ANONYMOUSLY.  FWS
>
>
>
> An open note to Boris Cefer and any one else crazy enough to read it:
>
> Boris, what's the difference between a WABCO R8, R10 and R12 brake
> valve?
>
> Pittsburgh Railways used the R-8 on the 1000, 1100, 1400 and 1500
> series cars.
>
> The R-10 was used only on the 1200 series.
>
> Finally, the R-12 was used only on 1600-1614, 1620-1644, 1648-1699.
> A modified R-12 was used on the other 1600s.
>
> A GE lockout relay 17 MV 15A1 was used on the 1000s and 1100s.   GE
> 17 MV22A5 went on to the 1200s.   HE 17 MV 15 A2 went onto the
> 1400s.   and GE 17 MV 15 C6 went onto the 1500s.   These were all for
> non-extended dynamic braking.
>
> Cars with extended dynamic braking received a 17 MV 15 C11 lock out
> relay.   The chart I'm reading from lists 1200s, 1400s, 1500s and
> 1600s except that cars 1615, 1616, 1617, 1618, 1919, 1946 and 1647
> but a 17 MV 22 A lockout relay.
>
> This, of course, indicates that the 1200s, 1400s, and 1500s came from
> the factory as non EDB cars and were rewired at Homewood.   There is
> no indication when the rewiring was done but it is pretty obvious
> that it would not have been done before 1600 was delivered in 1945.
> I would suspect any such program was also terminated by the
> separation of Duquesne Light and the money tree from Pittsburgh
> Railways at the end of the 1940s.    Thereafter they would have done
> only what was necessary to keep body and soul together because there
> was simply no money for anything else.   One can only question
> whether they would have rewired the 1100s next if the money had been
> available.
>
> FWS3