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Author Topic: Graham Farish Class 40 derailing anyone else have this problem  (Read 250 times)

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Offline Paul-H

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Hi all

I have one of the sound fitted Farish Class 40's which does like to derail itself, mostly around curves but sometimes even on the straights

Its the un driven set at each end that don't want to stay on track, I have checkedcked the back to back and that is fine

Anyone else have this issue, did you manage to fix it, if yes what did you do,

Thanks

Paul
« Last Edit: June 28, 2018, 06:55:29 am by Paul-H »

Offline Only Me

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Re: Graham Farish Class 40 derailing anyone else have this problem
« Reply #1 on: June 27, 2018, 01:46:44 pm »
They dont like R1 track or badly laid track..



Offline crepello

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Re: Graham Farish Class 40 derailing anyone else have this problem
« Reply #2 on: June 27, 2018, 02:40:12 pm »
From my experience  with 2(non-sound-fitted--makes no difference) Class 40s there is definitely a problem with this loco. My layout has gently canted curves (max scale equivalent 75mm) of reasonable radius which are well-laid and all other locos  and stock runs reliably. As explained elsewhere on this forum, I've tried replacing the ponies with Romfords (Parkside Dundas) which have seemed to improve performance at some locations but not others. My next strategy has been to file down the black projections on the underframes in case these were restricting bogie swing. As I have limited time at the moment, no conclusion has been reached; maybe I need to file down a bit more but I'll go carefully if I do. I'd be interested to hear others' views on this subject.

Offline Newportnobby

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Re: Graham Farish Class 40 derailing anyone else have this problem
« Reply #3 on: June 27, 2018, 05:08:55 pm »
I've found mine derails coming off a curve onto the curved part of the first point in the fiddle yard. The only way round it was to let it pass over the first point to the second point in the fiddle yard and all was OK. Ergo - it needed a straight piece of track before the curve of the point.

Offline bluedepot

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Re: Graham Farish Class 40 derailing anyone else have this problem
« Reply #4 on: June 27, 2018, 06:44:56 pm »
is it because this wheel set doesn't re-centre itself properly after a curve? presumably the other wheels are sprung back to centre by the contacts.

is it definitely clipped in place right?

maybe try widening the wheel back to backs? 

I have also had a few derailments after a r3 curve and on to a facing point but not that many times to worry about it.

Tim

Offline Dr Al

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Re: Graham Farish Class 40 derailing anyone else have this problem
« Reply #5 on: June 27, 2018, 10:55:34 pm »
This can happen if the pickups need adjusted - if they push a set of wheels hard over to one side then this can cause derailments - they therefore just need to be bent so they exert equal force on the backs of both wheels.

Cheers,
Alan
Quote from: Roy L S
If Dr Al is online he may be able to provide a more comprehensive answer.

Offline crepello

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Re: Graham Farish Class 40 derailing anyone else have this problem
« Reply #6 on: June 28, 2018, 07:37:16 pm »
Thanks for the replies on this chaps.
I forgot to add that my Farish 45s run perfectly on my layout.
I've removed the ponies and run the 40s as Co-Cos with no problems, so it's not a problem with the pick-ups. Unfortunately they don't look too good like this!

 

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