[CAUT] Guide rail pins

Porritt, David dporritt at mail.smu.edu
Tue Mar 16 17:56:39 MDT 2010


Oh yes, bushings start in the next day or so.  I'm doing a pretty complete job on this one.

dp


David M. Porritt, RPT
dporritt at smu.edu<mailto:dporritt at smu.edu>

From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of John Ross
Sent: Tuesday, March 16, 2010 3:58 PM
To: caut at ptg.org
Subject: Re: [CAUT] Guide rail pins

With pitted pins, the bushings are probably toast as well.
Don't forget the Bushmaster.
By re-bushing, it will allow you more leeway in your pin replacement.
John Ross,
Windsor, Nova Scotia
On 16-Mar-10, at 5:42 PM, Mark Dierauf wrote:


I assume that you're speaking of front-rail pins? Can you use the new WNG aluminum pins with their nylon bushings? according to their instructions, the FR holes are first reamed out to .183" and then the bushings are inserted and reamed out with a 1/8" bit to fit the lower FR pin diameter, which is .128".

- Mark

Porritt, David wrote:
I'm rebuilding a Baldwin R and on removing the corroded and pitted key pins, I discovered that the base of the guide rail pins are 0.177".  The top (swaged) part is a standard 0.146" but the part that is driven in the key frame is oversized.  Of course no one has replacement pins like this so I'm going to have to make some modifications.

Everything that I've thought of so far has looked like a major operation, and will leave lots of opportunity for errors.  Has anyone run into this before?  What did you do?

dave


_________________________
David M. Porritt, RPT
3024 County Road 2134
Caddo Mills, TX 75135
dporritt at smu.edu<mailto:dporritt at smu.edu>






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