New Server: Thank you for your patience. We moved to our new server. Everything should be back to normal EXCEPT for the Gallery. We will have that restored shortly and will make an announcement. If you see something that is not working please report it here: Server Upgrade.

!!

Not Registered?

Welcome!  Please register to view all of the new posts and forum boards - some of which are hidden to guests.  After registering and gaining 10 posts you will be able to sell and buy items on our N'porium.

If you have any problems registering, then please check your spam filter before emailing us.  Hotmail users seem to find their emails in the Junk folder.


Thanks for reading,
The NGF Staff.

Author Topic: Graham Farish Class 40 derailing anyone else have this problem  (Read 776 times)

0 Members and 1 Guest are viewing this topic.

Offline Paul-H

  • Trade Count: (0)
  • Full Member
  • ***
  • N Gauge Society Number: 27678
  • Posts: 584
  • Country: gb
  • Gender: Male
    • Awards
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 »
Please excuse any poor spelling, I am Dyslexic, just think yourself lucky if you can actually read what I typed.

All tiepin as bean spell chequed on mi Pea Sea

Online Only Me

  • Reader Of The Manual
  • NGF Technician
  • Trade Count: (+16)
  • Full Member
  • ****
  • N Gauge Society Number: 23206
  • Posts: 5728
  • Country: gb
  • Gender: Male
  • Creator of Minature Masterpieces
    • Northants & Cambs Area Group of the NGS
    • Awards
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

  • Trade Count: (0)
  • Full Member
  • ***
  • N Gauge Society Number: 3956
  • Posts: 184
  • Country: gb
    • Awards
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

  • Global Moderator
  • Trade Count: (+63)
  • Full Member
  • *****
  • N Gauge Society Number: 21962
  • Posts: 29967
  • Country: england
  • Gender: Male
    • Awards
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.

Online bluedepot

  • Trade Count: (+7)
  • Full Member
  • ***
  • Posts: 2545
  • Country: 00
  • Gender: Male
    • Awards
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

Online Dr Al

  • Trade Count: (+49)
  • Full Member
  • ***
  • Posts: 4327
  • Country: gb
  • Gender: Male
    • Awards
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

  • Trade Count: (0)
  • Full Member
  • ***
  • N Gauge Society Number: 3956
  • Posts: 184
  • Country: gb
    • Awards
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!

Offline crepello

  • Trade Count: (0)
  • Full Member
  • ***
  • N Gauge Society Number: 3956
  • Posts: 184
  • Country: gb
    • Awards
Re: Graham Farish Class 40 derailing anyone else have this problem
« Reply #7 on: July 22, 2018, 02:27:33 PM »
Maybe it's lack of weight in the bogie over the pony? That or the pony should be sprung? I know the Dapol 9F originally had problems before they cprrected it with a spring on the pony. I'll run off an e-mail to Farish after typing this.

Online bluedepot

  • Trade Count: (+7)
  • Full Member
  • ***
  • Posts: 2545
  • Country: 00
  • Gender: Male
    • Awards
Re: Graham Farish Class 40 derailing anyone else have this problem
« Reply #8 on: July 22, 2018, 03:16:26 PM »
yes i think both some additional weight and sprung to re-centre would help the pony wheels

write to the farish design team to suggest it on future models!


tim

Offline crepello

  • Trade Count: (0)
  • Full Member
  • ***
  • N Gauge Society Number: 3956
  • Posts: 184
  • Country: gb
    • Awards
Re: Graham Farish Class 40 derailing anyone else have this problem
« Reply #9 on: July 24, 2018, 11:09:19 AM »
 I've received confirmation from Bachmann that the matter has been passed to the Servicing Dept.

Offline crepello

  • Trade Count: (0)
  • Full Member
  • ***
  • N Gauge Society Number: 3956
  • Posts: 184
  • Country: gb
    • Awards
Re: Graham Farish Class 40 derailing anyone else have this problem
« Reply #10 on: July 25, 2018, 03:41:25 PM »
A bit of a result:-- I've been in touch with Jenni at Bachmann and she's referred it to the R&D Dept after seemingly accepting my assertion that it's a design problem.
My problem is the same as Nobby's--the front pony comes off after the curved track of a Peco code 55 point when it meets a similar curved point (radii 450 and 600mm).

Online Dr Al

  • Trade Count: (+49)
  • Full Member
  • ***
  • Posts: 4327
  • Country: gb
  • Gender: Male
    • Awards
Re: Graham Farish Class 40 derailing anyone else have this problem
« Reply #11 on: July 25, 2018, 04:27:05 PM »
Are these SL-E386F, 387F turnouts?

If so I have had no trouble with new 40s on them (my entire storage yard is built of them) - however, all the points have had kinks and bumps removed as these turnouts are notorious for having bumps and misalignments at the blade pivot points, and nobody ever notices until they lay them.

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

Online crewearpley40

  • Trade Count: (0)
  • Full Member
  • ***
  • Posts: 486
  • Country: gb
    • Awards
Re: Graham Farish Class 40 derailing anyone else have this problem
« Reply #12 on: July 25, 2018, 05:25:07 PM »
have you checked coils, bogie springs, the gap between body / chassis and wheels ?

just a thought

Offline Newportnobby

  • Global Moderator
  • Trade Count: (+63)
  • Full Member
  • *****
  • N Gauge Society Number: 21962
  • Posts: 29967
  • Country: england
  • Gender: Male
    • Awards
Re: Graham Farish Class 40 derailing anyone else have this problem
« Reply #13 on: July 25, 2018, 05:28:40 PM »
In my case the points are SL-E391/2 which have 12" radius curves.
Given a ladder of points in a 4 road fiddle yard it derails on the first but if using 2nd or 3rd point then all is fine. This happens regardless of which end of the fiddle yard is being used. I reckon the issue is the first point at each side of the loop follows a curve (I have no room to insert a straight). It's no big deal as I can work round it.

Offline ntpntpntp

  • Trade Count: (0)
  • Full Member
  • ***
  • Posts: 2356
  • Country: gb
    • Awards
Re: Graham Farish Class 40 derailing anyone else have this problem
« Reply #14 on: July 25, 2018, 05:57:33 PM »
I reckon the issue is the first point at each side of the loop follows a curve (I have no room to insert a straight). It's no big deal as I can work round it.


Ah... that old problem. One should always try and avoid a facing point immediately after a curve.   

If you physically cannot accommodate a short length of straight, you could try adding a check rail to guide flanges away from the outside rail.  I have one setrack point in my fiddleyard which I "bent" into a Y point, it's on a curve so I added copper clad sleepers and a check rail .  It's not pretty but it's worked 100% ok since 1995!


Nick.   2016 celebrating the 20th anniversary of "Königshafen" exhibition layout!

 

Please Support Us!
December Goal: £55.00
Due Date: Dec 31
Total Receipts: £120.00
Above Goal: £65.00
Site Currency: GBP
218% 
December Donations


Advertise Here
anything