[PRCo] Re: 1777 and 77/54 Photos

[Jim Holland]

Good Morning!

> Ken & Tracie wrote:

> Assuming 1777 still had her B-3 trucks, these large side
> by side scans can show novices such as myself the visual
> differences between the B-2 and B-3 trucks used
> on the 1600s.

> Jim, what do I look for?

	Scans did not come thru with this email.

	All the interurban cars kept by  ({[pat]})   ---   except 1613 &
1614   ---   kept their B3 trucks.    Later, more B3 trucks were
bought and placed under city 17s, with 1730 being one of those
cars.

	The thing that distinguishes the B3 is the large spring pot in
the center of the truck resting on the frame which is just below
the axle center line.    Forward of the spring pot on the door
side of the car is the Westinghouse Brake Actuator mounted
vertically; this same actuator is behind the spring pot on the
other side of the car.

	The B2 truck, whether used on the city 16s or 17s, has a tube
frame the length of the truck about the level of the top of the
wheels.    A torque arm connects the two axles below this
tube.    This torque arm is rigidly mounted to the back axle and
fits into a rubber gasket at the front axle for flexing.    The
torque arm is more narrow at this flexible joint.    This
arrangement is reversed on the blind side of the car.    The
torque arm appeared to be stamped metal on older PCCs as opposed
to metal plate on later models.

	On the 17s, the WAB actuator is mounted horizontally on the tube
frame forward of the bolster on the door side of the car;
opposite is true on the other side.

	Those are some features to look for to identify which type of
truck.    A more detailed description of the trucks is available
in the PCC books and maybe Fred will give a better outline.

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James B. Holland

Holland  Electric  Railway  Operation....... 
___"O"--Scale St.-Petersburg Trams Company Trolleycars and...
______"O"--Scale  Parts  mailto:pghpcc at pacbell.net

______Pennsylvania Trolley Museum http://www.pa-trolley.org/
___Pittsburgh  Railways  Company  (PRCo),   1930  --  1950
N.M.R.A.  Life member #2190; http://www.nmra.org

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