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Stender shorting out on points

stevieedge

78 posts

I wondered i anyone has had this problem beore

I have just transferred to n gauge and only have 2 locos so far, both brand new and running on dcc 1 runs fine the 2nd which is a graham farish peppercorn A2 4 6 2 which had the chip fitted at the time of purchase shorts on 2 of 20 sets of points, I cant see any vissible or measurable difference in the points but have tracked the problem down to the 3 undercarriage screws on the bottom of the tender these sit slightly proud , if i cover the screws with a little peice of sellotape the problem goes away, looking at my other loco which is also graham farish but not tender driven all screws are slightly recessed. I would not have thought they would have removed those screws at the time of changing to dcc. I dont think the problem is with the points they are only if anything a few thou different I strongly think the fault is with the tender somewhere.

Chrissaf

7174 posts


Community Moderator

Could you not replace the offending screws with a countersunk type and slightly countersink the hole they fit into. Either that, or just keep with your tape solution (changing the Sellotape for something more robust and longer lasting).

Chris........ Making the wood in the trees visible.

stevieedge

78 posts

thanks for the reply

I didnt really want to start countersinking the holes on a brand new loco so will probably go with a better tape solution for now, was a bit concerned there may be something else amiss that you guys had come across beore

Chrissaf

7174 posts


Community Moderator

Wait a bit longer for others to see and comment who have same or similar N gauge models. Hedley models N gauge, he might have something more meaningful to add.

Chris........ Making the wood in the trees visible.

Hi Stevieedge and Chris 

unfourtunately I only have diesels at the moment, and so I don’t have any problems with the points and I can’t really help you with this however I am considering Steam locos in the future so I’ll be keeping an eye on this topic.

however I’m very surprised that the Graham Farish has the screws protruding underneath the tender as I would have thought that they would have been countersunk, but the only other thing I can think of is that the point is slightly uneven but I would try and tighten the screws just a little touch to see if they are slightly not quite home when they were done at the factory 

Hedley

stevieedge

78 posts

just to point out they are already countersunk but the head of the screw still sits proud, as if the countersink wasnt quite deep enough 

stevieedge

78 posts

this shows the offending screws although it doesnt look like much it seems to be the problem the second photo shows the sellotape which tends to show the proyusion more, I have obviously tried tightening the screws.

Hi 

looking at the photos with the sellotape on and it shows the screws and it shows the screws  up more and I’m wondering if it’s the decoder that’s causing the problems as it might have been a little bit too high causing the screws not being able to go in further.

also how confident are you? as you could try and take the screws out and take the decoder out as well and then try and put the body back on trying it to see if the screws go back properly and just try pushing the tender over the point by hand and then see if the screws still catch the point and if they don’t then I suspect that it could be the decoder being a bit too thick for the tender and then you can put the decoder back in and try again to see if the same thing happens again and if so have a word with whoever put the decoder into it and then see if they can come up with a solution 

Hedley

Hi 

I have just been thinking could you not get in touch with where you purchased it from and ask them to either fix or replace the loco, also I wonder if it was possible for them to put the wrong screws back into the tender when installing the decoder for you

Hedley

Chrissaf

7174 posts


Community Moderator

Hedley makes a fair point about wrong screws.

.

There have been forum reports regarding Chinese made models in general (not specifically any particular brand or gauge) that the factory have over tightened screws making removal difficult.

.

I wonder if the decoder fitter, either burred up the original screws or had to drill them out to remove them and fitted non factory replacements.

Chris........ Making the wood in the trees visible.

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