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Wheel back to back measurements

3154 Views 19 Replies 10 Participants Last post by  Thunder
When I completed the track laying on my fiddle yard, I noticed that two of the five locos I was using for testing where shorting my ECoS when travelling over points. Great I thought a problem with the wiring. Thankfully, the wiring appears to be ok. That leaves me to suspect the back to back wheel measurements as being a problem as the other three locos have no problems.

I then bought the C&L back to back gauge for 00:

However, I am not sure how best to use this gauge. I believe the measurement between the wheel backs should be 14mm, is this correct?

Also, is there an easy way to adjust this on locos or does it involve a complete dismantle to prise the wheels further apart?

Sadly I suspect this will be a problem with quite a few of my locos and I guess is an unfortunate side effect of DCC as it comes with the required better sensitivity of boosters that forces you to use best operating practises!

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check out the NMRA B2B standards for N?

regarding the shimming of check rails....this is an old trick, it appears, being re-juvenated...used in the past to improve 'stock- tracking' through old-style Peco points.......I first used it to 'cure' tracking problems on old points when using NMRA standard wheelsets.

also have used milliput/ auto filler to block out the crossing [frog] area, and to 're-cut' grooes for the eliminate 'drop' at the crossing.....and shimming of the point rail/check rail at the crossing, narrowing the gap to enable a wheelset to be 'supported' on its travels through the crossing area, on its tread.

oh what tricks we all got up to?

needless to say...[regarding shimming the check rail]...... if mr Peco et al had really got their act together,and properly copied prototype practice....then the check rail would in fact play zero part in the guiding of the wheel flange to the correct side of the crossing vee......sadly, like having electric motors in boilers, we modellers have to stray ever so far from the real thing...
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absolutely agree, Brian........please letus see that puller,Richard
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