009 Society Members Forum

Modelling => Locomotives => Topic started by: Pete Williams on January 22, 2026, 12:49

Title: Help with Roco 31031 crankpin requested
Post by: Pete Williams on January 22, 2026, 12:49
Got the loco out of box, only to find that a crankpin has fallen out of one of the wheels.
due to failing eysight, I am unable to either find the pin or effect a repair.
anyone know where, preferably in Greater London I could take the loco for attention, please?
Many thanks fiven for all advice.
Pete
Title: Re: Help with Roco 31031 crankpin requested
Post by: B.Meldon on January 23, 2026, 09:21
That is an unusual fault!
As the loco in the 31031 set is an outside frame loco I guess the pin must have come out of one of the fly-cranks? If so the plastic fly-crank may have split?
Or has the fly-crank come off the axle?

Just to be clear is this the set and loco that you have:
https://www.reynaulds.com/products/Roco/31031.aspx

At one time all the parts were available from Roco, I have no idea if they still provide that service, but I doubt it!

If it is any help here is a link to the parts list:
https://www.roco.cc/static/frontend/Casisoft/Roco/en_GB/doc/ET/1/DE/33237_202902.pdf
Title: Re: Help with Roco 31031 crankpin requested
Post by: JulienW on January 23, 2026, 09:26
Hello Pete.

The first problem may be in getting a replacement crank pin. This should be the spares on the Roco website (https://www.roco.cc/ren/spareparts?et=31031) but you may need the instruction sheet to narrow down the part number you need. If they are not available then you'd need to work out the size of pin needed (diameter and length) so that an alternative could be found.

As to finding someone to actually do the work I'd suggest making contact with your local area group.  The full list is at https://www.009society.com/news/area-groups/ and with "greater London" then I'd suggest the Buccabury group and, whilst they are not an 'official' 009 Soc area group maybe someone at the Greenwich & District Narrow Gauge Railway Society (https://www.gdngrs.com/) may be able to help.

Edit: Looks like Brian beat me to the parts list!
Title: Re: Help with Roco 31031 crankpin requested
Post by: Pete Williams on March 02, 2026, 19:19
Yes, Brian, that is the loco,but i was wrong in my fault description. It is the return crank pin that fell out of the wheel I have reassembled the parts, but the pin is loose and insecure. ( Old git, failing eyesight) What would you suggest I use to keep the pin in place, or will I have to order a new wheel set?
Regards, pete
Title: Re: Help with Roco 31031 crankpin requested
Post by: B.Meldon on March 03, 2026, 09:07
Is there any way you an post a photo? To get a close-up in focus you can just put a magnifying glass up to the camera/phone lens.
One way to re-secure fixed valve gear pins is by using a tiny amount of super-glue. Perhaps just enough to fit on the sharp end of a pin.
But great care is needed to ensure it only goes where you want it and does not jam the valve gear movement so it may be beyond your stated ability. Your best bet may be to go to a 009 Society group meeting near you. But there are none in greater London. We did occasionally have Essex Group meetings in Woodford Green, but as only one member turned up to the last one I organized at my place in Canewdon I have not bothered to arrange any more!