[PRCo] Re: Pittsburgh B-3 Trucks

[boris6 at volny.cz]

Interesting questions. I understand, that side frames, axle
assemblies, springs and bolsters were fully interchangeable. I am
not sure, if the motor girders from interurban 1600s were
suitable for mounting of WABCo. brake actuator. The air operated
drum brake on 1600s' B-3 was not too complicated as the shoe
brake mechanism; I am not sure but suppose, that the air operated
drum brake was of internal expanding type (Clark probably) and
mounted on pinion housing of the gear unit. I have seen only that
photo of experimental B-3 with NACO (????) wheels in Fred's Car
That Fought Back. But where are the brake cylinders? I hanker
after some details, but B-3 was not too common (in the US, of
course; we have almost only B-3s here) and its pictures seem to
be very rare. I haven't the list of cars surviving at the PTM in
my hands now, but is there any interurban 1600? 1613 (17xx II)???
It might give some answers. Perhaps this is a task for our PTM
friends...

Boris

Od: "Ken & Tracie"

> Was it possible to swap B-3 trucks from an air-electric
> 1600 series
> interurban PCC and an all-electric 1700 series
> interurban PCC?
> 
> In other words, how labor intensive was it to switch
> the brake rigging &
> hardware, or was it even possible to convert a truck
> from an "air car"
> to all electric use or visa versa?

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