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Ross		#1 Posted : 07 June 2024 03:54:36(UTC) Retweet
Joined: 25/09/2006(UTC) Posts: 945 Location: Sydney, NSW		Hi All, While servicing a steam locomotive which needed re-quartering of the wheels I discovered this part which I have never seen before. There is no mention of the part in the explosion diagram for the mystery locomotive first produced in 1991. Has anyone seen this part used on steam locomotives they have?
		Ross
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marklinist5999		#2 Posted : 07 June 2024 11:00:05(UTC) Retweet
Joined: 10/02/2021(UTC) Posts: 3,865 Location: Michigan, Troy		No, what is the model? Perhaps it is a shim for keeping the gears from bottom runout and quieting them.
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Jimmy Thompson		#3 Posted : 07 June 2024 14:19:59(UTC) Retweet
Joined: 26/03/2019(UTC) Posts: 748 Location: Florida Classic but Successful Swampland City		Shoving my oar in the water with a Silly Wild A$$ Guess... It may be an idle wheel for close radii curves with a bit of 'shift/flex/side-to-side-motion' in the axle arrangement to allow for the close curves??? I am probably completely wrong, but... Edited by user 07 June 2024 23:41:25(UTC)  | Reason: Not specified
		Jimmy T Analogue; M-track; KLVM; DDR; Primex; Sarrasani Zirkuswelt There is a Prototype For Everything
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Ross		#4 Posted : 07 June 2024 23:34:46(UTC) Retweet
Joined: 25/09/2006(UTC) Posts: 945 Location: Sydney, NSW		Hi 5999, A first name is always nice to address you by. I agree with the shim idea. I will disclose the loco model number later. My thoughts, is this a Marklin experiment? Of my many locomomotives this is the only example. Originally Posted by: marklinist5999 No, what is the model? Perhaps it is a shim for keeping the gears from bottom runout and quieting them.
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marklinist5999		#5 Posted : 07 June 2024 23:38:57(UTC) Retweet
Joined: 10/02/2021(UTC) Posts: 3,865 Location: Michigan, Troy		Hi Ross. Mike here above.
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Ross		#6 Posted : 07 June 2024 23:45:41(UTC) Retweet
Joined: 25/09/2006(UTC) Posts: 945 Location: Sydney, NSW		Hi Jimmy, This axle and large wheels is the only drive wheel arrangement for the locomotive. My interest is has anyone seen this on their locomotives. I have another version of this locomotive produced in 1992 with the same road number where the shim isn't used. Originally Posted by: Jimmy Thompson Shoving my oar in the water with a Silly Wild A$$ Guess... It may be an idle wheel for close radii curves with a bit of 'shift/flex/side-to-side-motion' in the axle arrangement to allow for the close curves??? I am probably completely wrong, but...
		Ross
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Ross		#7 Posted : 07 June 2024 23:47:13(UTC) Retweet
Joined: 25/09/2006(UTC) Posts: 945 Location: Sydney, NSW		Hi Mike, thanks for the name. Originally Posted by: marklinist5999 Hi Ross. Mike here above.
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Ross		#8 Posted : 22 June 2024 04:49:59(UTC) Retweet
Joined: 25/09/2006(UTC) Posts: 945 Location: Sydney, NSW		Hi All, While servicing steam locomotive number 3690 Road Number 011 056-9 which needed re-quartering of the wheels I discovered this part which I have never seen before. There is no mention of the part in the explosion diagram for this locomotive first produced in 1991. I also have 3790 version and the part in question isn't used. Does any one have 3390 which has the same road number 011 056-9 and check if the rubber ring is used? Has anyone seen this part used on other steam locomotives they have? Is this a Marklin experiment to control gear noise?
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Dave Banks		#9 Posted : 22 June 2024 08:20:19(UTC) Retweet
Joined: 08/03/2006(UTC) Posts: 1,041 Location: Gold Coast, Australia.		Looks like a traction tyre to me: //static.maerklin.de/dam...45599e76cc1434542514.pdf
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Ross		#10 Posted : 23 June 2024 00:49:40(UTC) Retweet
Joined: 25/09/2006(UTC) Posts: 945 Location: Sydney, NSW		Hi Dave, No it isn't a traction tyre as it is flat against the wheel rim.
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xxup		#11 Posted : 23 June 2024 02:13:29(UTC) Retweet
Joined: 15/03/2003(UTC) Posts: 9,578 Location: Australia		Did you have this loco from new? Is it possible someone put the washer/ring there to solve a lateral travel (or tolerance) problem?
		Adrian Australia flag by abFlags.com
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Ross		#12 Posted : 23 June 2024 02:33:45(UTC) Retweet
Joined: 25/09/2006(UTC) Posts: 945 Location: Sydney, NSW		Hi Adrian/All, Yes I have had 3690 and 3790 from new. This thin ring is hard to spot unless you know what you are looking for. Originally Posted by: xxup Did you have this loco from new? Is it possible someone put the washer/ring there to solve a lateral travel (or tolerance) problem?
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Nigel Packer		#13 Posted : 23 June 2024 11:52:45(UTC) Retweet
Joined: 11/02/2006(UTC) Posts: 694 Location: Cheshire, UK		Hi Ross, I have a 3390 and a 3790 (but no 3690). Both my locos are new and unused, but neither has this strange rubber ring. In both cases, the geared driving wheel looks like your left-hand picture, just plain flat metal with the gearing. I’ve never seen this on any of my locos, so it remains a bit of a mystery. I’m glad to hear you’re still interested and puzzling over details that were made 33 years ago! Best wishes, Nigel
		Märklin collector since age 5. H0 Collection from 1935 to today.
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Ross		#14 Posted : 24 June 2024 01:50:48(UTC) Retweet
Joined: 25/09/2006(UTC) Posts: 945 Location: Sydney, NSW		Hi Nigel, Thank you for your information that the 3390 is without the ring. I guess I'm showing my age with an older locomotive that has this ring but it could be a Marklin experiment and as you say a mystery. It would be great if someone has a 3690 from new to see if it has the ring or not. And yes still interested in trains and how things work. Regards Ross Originally Posted by: Nigel Packer Hi Ross, I have a 3390 and a 3790 (but no 3690). Both my locos are new and unused, but neither has this strange rubber ring. In both cases, the geared driving wheel looks like your left-hand picture, just plain flat metal with the gearing. I’ve never seen this on any of my locos, so it remains a bit of a mystery. I’m glad to hear you’re still interested and puzzling over details that were made 33 years ago! Best wishes, Nigel
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