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Author Topic: Farish Class 37 couplings  (Read 344 times)

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Offline scruff

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Farish Class 37 couplings
« on: July 12, 2017, 07:15:04 pm »
Hi guys

I have a few of the newer DCC ready Farish class 37 loco's with NEM pockets and when coupling them to anything, I thought the scale 6 foot gap was excessive.
So, I thought I'd remedy this by swapping the couplers for the short shank rapido couplings and then the trouble started!
I found the short couplers are resting against the plate that holds the NEM coupling housing and not returning to the level position.
I tried shaving the front of the mount holding plate to allow the coupling to drop but I don't want to remove too much material and weaken it.

Anyone got any ideas on how to solve this dilemna?

Cheers
Mark

Offline ntpntpntp

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Re: Farish Class 37 couplings
« Reply #1 on: July 12, 2017, 07:27:03 pm »
Not being an owner of a 37 I'm struggling to visualise what's wrong - can you post a photo?
Nick.   2016 celebrating the 20th anniversary of "Königshafen" exhibition layout!

Offline Bob G

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Re: Farish Class 37 couplings
« Reply #2 on: July 12, 2017, 08:03:58 pm »
Its not a specific 37 problem. its the couplers. Presumably you are using Farish short shank designs.
The current batch seem to be tight in the NEM pockets. They are even tighter in Dapol and DJM models.
Some models have short shanks supplied (I think the 150 did) and they might be better.
You need to thin down the coupling bar thickness, not anything in the NEM pocket.
You might also consider filing the pivot pins a little.
Better to muck up a coupler than an NEM box!

HTH
Bob

Offline MJKERR

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Re: Farish Class 37 couplings
« Reply #3 on: July 12, 2017, 08:36:28 pm »
All of my Farish 37 have had the original coupling replaced with the shorter version
The only issue I have is that it is more rigid
Once located, the coupling is then pushed down level
If the coupling is not level, then the coupling is removed, bent slightly, then reinserted

Offline ntpntpntp

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Re: Farish Class 37 couplings
« Reply #4 on: July 12, 2017, 10:43:49 pm »
Maybe try a different brand of NEM short shank Rapido coupling?  Must be other out there eg Fleischmann, Hornby/Arnold, Minitrix, other small firms?

http://www.nme-online.de/n---standard-kupplung-nem-357,-art.-nr.---900005.html
Nick.   2016 celebrating the 20th anniversary of "Königshafen" exhibition layout!

Offline Dr Al

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Re: Farish Class 37 couplings
« Reply #5 on: July 12, 2017, 11:47:16 pm »
Farish changed the design - originally the coupler box was retained by a pin - the short shank couplings fitted fine.

They changed the retention of the box to a clipped flavour, and clearly did not fit check that the short shank couplers *that they include in the box!!!* fit.

I cut off enough of the moulding to clear it on these locos, and there's no trouble.

I described this late 2014 on delivery of the first revised 37s, showing my modified one with a short shank:
http://www.rmweb.co.uk/community/index.php?/topic/53421-farish-announce-class-374/?p=1706857

Couplings can also be stiff to raise I found, so some filing of clearance (coupler width on end that engages in socket) tends to be needed.

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

Offline MJKERR

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Re: Farish Class 37 couplings
« Reply #6 on: July 13, 2017, 01:27:56 pm »
They changed the retention of the box to a clipped flavour, and clearly did not fit check that the short shank couplers *that they include in the box!!!* fit.
Good point, I do not use the coupling included with the model
I am using the Short Coupling available separately, but I would not have expected them to be different

Offline Dr Al

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Re: Farish Class 37 couplings
« Reply #7 on: July 13, 2017, 05:24:56 pm »
Good point, I do not use the coupling included with the model
I am using the Short Coupling available separately, but I would not have expected them to be different

They are identical. So the front of the ledge on the newer style bogie coupling mounts still needs shaved off to clear the vertical uncoupling peg.

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

Offline MJKERR

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Re: Farish Class 37 couplings
« Reply #8 on: July 13, 2017, 08:56:15 pm »
They are identical. So the front of the ledge on the newer style bogie coupling mounts still needs shaved off to clear the vertical uncoupling peg
How strange
I have all of the following, and no such issue
371-466 37035
371-469 37174
371-467 37239
371-165 37407 x 6
371-166 37406
371-167 37514

If you take a look at the photos of the Class 37 on my website, you can see the majority are horizontal
The only ones that have since been modified are
37405 (37407)
37707 (37514)
« Last Edit: July 13, 2017, 08:57:22 pm by MJKERR »

Offline Dr Al

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Re: Farish Class 37 couplings
« Reply #9 on: July 14, 2017, 12:11:01 am »
They are identical. So the front of the ledge on the newer style bogie coupling mounts still needs shaved off to clear the vertical uncoupling peg
How strange
I have all of the following, and no such issue
371-466 37035
371-469 37174
371-467 37239
371-165 37407 x 6
371-166 37406
371-167 37514

If you take a look at the photos of the Class 37 on my website, you can see the majority are horizontal
The only ones that have since been modified are
37405 (37407)
37707 (37514)

371-466 37035
371-469 37174
371-467 37239
are all original bogie frame style with a pin, and no ledge, so do not experience this. If the chassis on any of your other locos has this pin style then it's not originally from a 37/4, but from one of the above (or the BR blue/green examples first produced). I've multiple examples of all the later production (most bought new, some secondhand) and all have the design change. It's presumably so they can use common components, and also because the original 37/0s with the plastic pin holding the NEM socket on had the original Farish NEM specification which was out of spec! Farish changed this subtly without making any fanfair about it so their models did all conform to the NEM standard.

I've had to do ththe ledge shaving mod to all my newer 37s, and is part of the standard modifications I do including body lowering.

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

Offline scruff

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Re: Farish Class 37 couplings
« Reply #10 on: July 14, 2017, 10:10:58 pm »
Thanks guys,
Really appreciate the ideas and I'm hoping to set some time aside next week to fettle them all.

For reference the are:
37035
37133
37239
37406
37407
37506
37514

so you can see, just a couple to keep me going!

Cheers
Mark

Offline MJKERR

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Re: Farish Class 37 couplings
« Reply #11 on: July 22, 2017, 10:56:03 pm »
Just turned over all my class 37 models and can see the difference now
The ones with a circular join have a slightly longer position
The ones with a clip (NEM pocket) have a slightly shorter position, and this pushes the coupling up

 

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