[PRCo] Re: PCC Control

[Herb Brannon]

If you recall, after the car had been run for a couple hours the hard braking stopped. This was how some of the all-electrics acted. After they were put through their paces for a while, all the moving parts would be warmed-up and running smoothly.
 
Herb Brannon


----- Original Message ----
From: Fred Schneider <fwschneider at comcast.net>
To: pittsburgh-railways at dementia.org
Cc: Orient Bernie <bernieo22 at verizon.net>
Sent: Tuesday, May 15, 2007 11:22:28 AM
Subject: [PRCo] PCC Control


Boris:

You bees the expert on this ...

When I was running 1711 this weekend, I was bothered by an inability  
to get the put my foot on the brake pedal lightly enough at almost  
any speed to keep the dynamic brakes from coming on with a real  
jolt.    It was especially rough at low speeds.   I know it isn't a  
characteristic of all PCCs because I've never had the problem with  
Baltimore Transit 7407; that car is much smoother.   Herb Brannon  
commented that some PAT cars were that way and some were not, so it  
must be either an adjustment or set up issue with the master  
controller or a failure.   Are field shunts supposed to come in very  
briefly in braking to cushion the initial application and then drop out?

Fred