[PRCo] Re: PCC Brake Valves

[Boris Cefer]

1648 was among the interurban cars with air actuators. It cound not have the 
standard R12 but the modified version.
And what about car 1547? It was electrically similar to the 1601-1699 
series, it had EDB and was thus equipped with R12 too.

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
>
>
>
>
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