[PRCo] Re: PCC Brake Valves

[Fred Schneider]

The list is dated December 6, 1955.   Car 1648 is not on the list.

On May 30, 2007, at 2:57 PM, Boris Cefer wrote:

> 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
>>
>>
>>
>>
>> __________ Informace od NOD32 2298 (20070530) __________
>>
>> Tato zprava byla proverena antivirovym systemem NOD32.
>> http://www.nod32.cz
>>
>>
>
>