 Joined: 10/10/2012(UTC) Posts: 95 Location: Linköping, Sweden
|
So I ran my 8891 continuously for 30 minutes and then when I ran it again it twitched and only went backwards.
The loco is not moving forwards, but the motor runs both ways.
I disassembled the loco, removed the motor and discovered that the drive shaft was worn out.
I checked for spare parts at http://www.maerklin.de/ but the loco 8891 is not manufactured anymore and it seems like they dont have any spareparts for it in stock either.
Any suggestions how to find a new drive shaft or at least similar cogwheel ? The motor is removed. The driveshaft is worn out.
|
 1 user liked this useful post by Z-nerd
|
|
|
|
 Joined: 14/01/2006(UTC) Posts: 1,802 Location: Wurttemberg
|
|
3 users liked this useful post by Markus Schild
|
|
|
|
Joined: 10/10/2012(UTC) Posts: 95 Location: Linköping, Sweden
|
Originally Posted by: Markus Schild  It seems like ebay.de has the cheapest shipping-EUR 6,90 worldwide. The norwegian shop wants 14EURO for posting that tiny thing to neighbouring Sweden. 
|
|
|
|
|
|
 Joined: 21/09/2012(UTC) Posts: 1,730 Location: Toronto
|
Originally Posted by: Z-nerd It seems like ebay.de has the cheapest shipping-EUR 6,90 worldwide. Thanks for the tip. I keep on hearing good things about E-bay.de - too bad I don't read German and Google only helps so far. Out of curiosity, what is it about the drive shaft that led you to conclude it's worn out? The picture does not help me. Thanks. |
|
|
|
|
|
|
Joined: 10/10/2012(UTC) Posts: 95 Location: Linköping, Sweden
|
Originally Posted by: baggio Originally Posted by: Z-nerd It seems like ebay.de has the cheapest shipping-EUR 6,90 worldwide. Thanks for the tip. I keep on hearing good things about E-bay.de - too bad I don't read German and Google only helps so far. Out of curiosity, what is it about the drive shaft that led you to conclude it's worn out? The picture does not help me. Thanks. Dont you see that it's worn out compared to the new drive shaft ?
|
|
|
|
|
|
Joined: 21/09/2012(UTC) Posts: 1,730 Location: Toronto
|
Did the new shaft solve the problem?
(I only see that the new shaft looks sharp, but not that the old one is worn out. Sorry.) |
|
|
|
|
|
|
Joined: 14/01/2006(UTC) Posts: 1,802 Location: Wurttemberg
|
Hi Baggio,
Look at the worm-gear. No tooth any more.
Regards
Markus
|
2 users liked this useful post by Markus Schild
|
|
|
|
Joined: 16/02/2004(UTC)
Posts: 15,443
Location: DE-NW
|
Originally Posted by: baggio I only see that the new shaft looks sharp, but not that the old one is worn out. The worm drive has one tooth that takes five rounds around the shaft. All five rounds originally look the same. On the worn drive the tooth is much smaller and much wider in the middle. Loco stopped because the cog-wheel no longer made contact. The worm is like a screw, a cylinder screw - when it is new. |
Regards Tom --- "In all of the gauges, we particularly emphasize a high level of quality, the best possible fidelity to the prototype, and absolute precision. You will see that in all of our products." (from Märklin New Items Brochure 2015, page 1) ROFLBTCUTS  |
1 user liked this useful post by H0
|
|
|
|
 Joined: 17/03/2012(UTC) Posts: 138
|
Why did it wear out so quickly after 30 mins? Must be some other issue there? Heavy friction on the gears? Only that worm gear worn out, how about the other gears? Puzzling.... 
|
|
|
|
|
|
Joined: 14/01/2006(UTC) Posts: 1,802 Location: Wurttemberg
|
Hi,
It was not worn in 30 minutes but in several years. It was just the last 30 min run which took the last 1/100 mm which decides between mesh and no - mesh.
Regards
Markus
|
|
|
|
|
|
 Joined: 23/07/2014(UTC) Posts: 8,470 Location: ENGLAND, Didcot
|
Originally Posted by: waltklatt Why did it wear out so quickly after 30 mins? Must be some other issue there? Heavy friction on the gears? Only that worm gear worn out, how about the other gears? Puzzling.... I understood he ran it in only one direction for 30 minutes. It was when he changed direction that he discovered it wouldn't run that way. Thi sis probably the reason it was sold to him, without being told it is faulty.
|
|
|
|
|
|
 Joined: 31/12/2010(UTC) Posts: 3,994 Location: Paremata, Wellington
|
Originally Posted by: baggio Did the new shaft solve the problem?
(I only see that the new shaft looks sharp, but not that the old one is worn out. Sorry.) Compare detail....   Should be more apparent - if you are not used to spotting wear on gears, this will surely help you for future :-) |
Cookee Wellington  |
2 users liked this useful post by cookee_nz
|
|
|
|
Joined: 10/10/2012(UTC) Posts: 95 Location: Linköping, Sweden
|
Finally I received my new drive shaft. Total cost with shipping 12.85 EUR. Quite a lot for such a small part.  It was not very difficult to change the drive shaft. Now the old loco runs as usual again. My video of the change of the driveshaft. (No english)
|
1 user liked this useful post by Z-nerd
|
|
|
|
Joined: 23/07/2014(UTC) Posts: 8,470 Location: ENGLAND, Didcot
|
|
|
|
|
|
|
Joined: 10/10/2012(UTC) Posts: 95 Location: Linköping, Sweden
|
Originally Posted by: kiwiAlan Well. There was no other option, than to order it from german ebay. A norwegian shop was cheaper, but they didnt ship anything abroad. The 8891 loco is old and this spare part is not manufactured anymore and it's also sold out at the Märklin factory. In another modelrailway forum, someone was surprised to see that I didnt lubricate the cogwheel. I dont do that anymore, because I run my locos quite rarely and I am afriad of that horrible hardened oil syndrome. Yes, what will I do with that worn out drive shaft ? as you wrote maybe it could be a load for a flat car.
|
|
|
|
|
|
Forum Jump
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.
