[PRCo] Re: Pgh Railways Street Car Operators Wanted Ad

[John Swindler]

System component 4.65 in the PCC2 state inspection manual requires the pole tension to be :  "check shoe pressure against wire (25 to 30 ft. lbs.) using a spring gauge.  

 

This is done by tying a short loop in the trolley rope (Elmwood has some ex. Navy men) and using a spring gauge.  The tension can be adjusted at the trolley base.  There's a "U" clamp on the pole that can be moved. Also nut and bolt assembly with each spring.  

 

Also, the retiever is to be removed and replaced with a rebuilt retriever during each "C" inspection.  That means each year.  And I've seen the documentation for this in the work orders in the car maintenance records.

 

Cheers

John

 

 

 

 


 
> From: fwschneider at comcast.net
> Subject: [PRCo] Re: Pgh Railways Street Car Operators Wanted Ad
> Date: Sun, 25 Oct 2009 15:31:45 -0400
> To: pittsburgh-railways at dementia.org
> 
> I'm laughing my pants off about recommended tension. We need a box 
> of new springs at PTM. You can put up one pole on 78 with one 
> hand ... probably has all of 15 pounds tension. It needs to be 
> replaced badly and springs cost mucho dollars. Any one want to 
> contribute?
> 
> And 5326 has one spring that damn near lifts me off the ground.
> 
> 
> On Oct 25, 2009, at 2:48 PM, TEP wrote:
> 
> >
> > No typo. The carbon shoes on a trolleybus require slightly more 
> > than twice
> > the upward spring force of a streetcar trolley pole, nominally 72 
> > lb each.
> > They have to stay on even when off-centre -- the maximum roam is 14 
> > ft.
> >
> > The operator is instructed to only handle one pole at a time but 
> > this is
> > often breeched meaning grabbing both ropes at once -- and the 140 
> > lb uplift
> > requires at least that body weight according to my physics.
> >
> > At the time of the ad the US was contributing to the UK war effort 
> > through
> > lend-lease, but was not at war, and there were strong forces in the 
> > USA
> > opposing entry, despite Roosevelt's views. So I might be speaking 
> > German now
> > if not for Pearl Harbor!
> >
> > Tom P.
> > -----------
> >
> > Phillip Clark Campbell wrote: 2: Is that a typo - 70#? Ohio Brass 
> > recommends
> > a maximum of 30-32 pounds for wheels; 25-30 pounds for shoes at 
> > wire height
> > of 18-feet. I understand Prc used a modestly higher figure for 
> > interurbans.
> > In 1941 which we are discussing, OB was the standard to follow. Modern
> > trolley poles today may use less 'tension' as mass of pole is 
> > lighter. 70#
> > isalmost triple the low figure for shoes; poles would snap in two 
> > under such
> > tension while severe damage would result to the overhead on 
> > dewirements
> > regardless of effectiveness of retrievers.
> >
> >
> >
> >
> 
> 
 		 	   		  
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