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Bachmann 31-455, 41212.

Posted: Sun Dec 24, 2017 8:40 am
by Tom@Crewe
I was thinking of buying the Bachmann 31-455, Ivatt 2MT 2-6-2T 41212.

But I have been told they all wobble while running, is this true of all of them?
Also if I got one that wobbled is there a cure?

Re: Bachmann 31-455, 41212.

Posted: Sun Dec 24, 2017 9:32 am
by Bigmet
This one will have the the old split chassis construction, so it is either very old stock if buying new, or s/h. They are subject to all the well known problems of this construction which may include but is not restricted to wobbly wheels, breaking axles, splitting gears, bowing wheelface inserts, plating wearing through reducing pick up effectiveness. Spares may or may not be available, Bachmann have stopped making this mechanism so factory parts are not getting any younger or more available.

I would advise against, keep your money and put it toward the currently produced steel axle and wiper pick up chassis model. Same body as the older model but a mechanism that is capable of long term reliable performance, and will require little if any maintenance if it is good when received. (And if it is a rare lemon, you send it back!)

Re: Bachmann 31-455, 41212.

Posted: Sun Dec 24, 2017 9:41 am
by Tom@Crewe
Thanks Bigmet.

I did particularly want that number, I have placed on myself the condition that my locos should have been Late crest, run from Crewe Depot's and built at Crewe. So will follow your advice and buy a newer version and just renumber it.

Thanks again. :D

Re: Bachmann 31-455, 41212.

Posted: Mon Dec 25, 2017 12:32 am
by SRman
Yes, Bigmet's advice is sound. :)

Yes the old style chassis do have a tendency to wobble and/or waddle, although my pair are not too bad in that regard. The new chassis should be a step or two better still.

Renumbering the Ivatts is not difficult (I have done a couple of the old ones with split chassis). An ink rubber, track rubber, or even a wooden lolly stick will remove the old numbers (and crests if desired) without damaging the paint.

Re: Bachmann 31-455, 41212.

Posted: Mon Dec 25, 2017 2:45 am
by D605Eagle
Bachmann still stock complete wheel sets and also the axle centers for these locos. They only thing that will completely kill it is if the chassis has worn badly. That part isn't available. As split chassis go these ones are a bit better than others, the only real issue is axles splitting on the earlier produced ones and ware as Bigmet described on high mileage models. If you are going to buy you really need to see it in the flesh first. See it run to make sure it runs true, make sure there isn't lots of play in the wheels and check the tyre treads aren't worn. Buying from ebay would be a bit risky IMO.

Re: Bachmann 31-455, 41212.

Posted: Tue Dec 26, 2017 6:44 am
by Tom@Crewe
Is there are sites which give information when models changed over from split chassis.

For Bachmann, Hornby etc.

Re: Bachmann 31-455, 41212.

Posted: Tue Dec 26, 2017 11:40 am
by Bigmet
No there are not to my knowledge, but someone else may know differently! You just have to know.

Such lists come about typically because an enthusiast really wants to find out how the land lies. Could it be you?

Re: Bachmann 31-455, 41212.

Posted: Tue Dec 26, 2017 12:17 pm
by Bufferstop
Not a list of split chassis models, but a list of DCC status http://www.alex-wells.co.uk/wp-content/uploads/2013/03/Decoders-to-12-13.pdf
If it's DCC ready or DCC fitted it's guaranteed to have a conventional wiper fitted chassis. The only ones it may miss out are early new chassis models that weren't wired with a DCC socket.
As D605Eagle says the only fully reliable method for secondhand purchases is to see it in the flesh. If you go to one of the big vendors, check their returns policy, under distance selling regs they are obliged to let you return it, it's just the how that is debatable. It's easy to identify a split chassis model just by looking underneath, no wipers and the chassis looks like a plastic sandwich, look at the metal beyond the ends of the keeper plate. Of the various problems that beset these chassis worn plating is the easiest to over come, just some little wipers bent up from phosphor bronze strip with a J shaped end hooked over the bottom edge of the metal before re-fitting the keeper plate.
Whether or not it's worth a punt is up to you. My old Mainline 2251 class 0-6-0 ran up to the day its magnets died with no more than just those wipers fitted. Somewhere around 15 years old and on its second armature.

Re: Bachmann 31-455, 41212.

Posted: Tue Dec 26, 2017 1:08 pm
by Mike Parkes
The non split chassis Ivatts are 31-440 41243 BR lined black early emblem and 31-441DC 41291 BR lined black late crest DCC fitted. They have come in for some criticism as the body moulding is now relatively old not to current standards yet the list prices of each, £129.95 and £154.95 are somewhat eye watering. They do seem to sell at the usual rate of discount without appearing in anyone's bargain offers

Re: Bachmann 31-455, 41212.

Posted: Tue Dec 26, 2017 1:13 pm
by Mike Parkes
Tom@Crewe wrote:Is there are sites which give information when models changed over from split chassis.

For Bachmann, Hornby etc.


A split chassis can be a good design - the problem is with Kaders means of construction for Mainline and Bachmann which seems to have a limited lifespan and which can be drastically shortened by the use of inappropriate lubricant - WD40 for example.

Hornby have to my knowledge only one split chassis model - the Triang originated Rocket and those in terms of chassis are very robust, its the motor that gives up.

DJM I believe have used split chassis again without any problems being reported as far as I aware.

Re: Bachmann 31-455, 41212.

Posted: Wed Dec 27, 2017 3:56 am
by D605Eagle
31-601 to 612 are split chassis V1/3s 613 onwards are DCC ready with wiper pickups. That's my contribution sofar!

Re: Bachmann 31-455, 41212.

Posted: Wed Dec 27, 2017 10:08 am
by Bigmet
Mike Parkes wrote:...DJM I believe have used split chassis again without any problems being reported as far as I aware.

Also the 2 commissioned steamers he designed whiole working for Dapol , Beattie 2-4-0 WT and Sentinel 0-4-0 VBT.

Elsewhere, Bachmann and Hornby are still using split axle pick up technique very successfully on MU power cars and trailers, coaches and diesel locos, but they don't advertise it! The smaller wheels than are typical with steam, and no side rods creating cyclically varying forces, with better materials choices and construction make these very reliable. I have specimens of all these, and very good they are too. On the coaches and MU trailer cars they result in some of the most free running vehicles on sale in OO.

Re: Bachmann 31-455, 41212.

Posted: Sun Dec 31, 2017 9:47 am
by Tom@Crewe
I have almost decided to go for the Bachmann 31-440.

I will have to change the Number, Crest and Shed number. Is there any other detailing worth carrying out?

As I have said I would like it to be a Crewe Built and in the Crewe shed's so from that my research leaves me with 4 Loco's

41204, 41212, 41220 and 41229 I want to check and find some Loco pictures before deciding which number to use.

Advice and help welcome.....

Re: Bachmann 31-455, 41212.

Posted: Sun Dec 31, 2017 11:27 am
by Mike Parkes
Tom@Crewe wrote:41204, 41212, 41220 and 41229 I want to check and find some Loco pictures before deciding which number to use.

That narrows you down to 41204 as the rest were push-pull fitted locos which Bachmann have not yet realised without a split chassis mechanism.
Google throws up the following pictures

https://c1.staticflickr.com/1/429/32021 ... 1844_b.jpg

https://photos.smugmug.com/Trains-Railw ... 1-66-S.jpg

Re: Bachmann 31-455, 41212.

Posted: Sun Dec 31, 2017 12:39 pm
by Tom@Crewe
Which Company is best for Numbers, Builder plates, and Shed plate transfers