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Offline Robyn Boyd  
#1 Posted : 03 February 2019 04:36:57(UTC)
Robyn Boyd

United States   
Joined: 25/11/2010(UTC)
Posts: 23
Location: everett, WA
Hello,

I recently received a f 800 locomotive that has a worn out screw on one of the drive rod assemblies. I was inquiring about the possibility that this screws are still available and what is the best procedure to remove the old screw since the head has worn off. The locomotive is likely from 1952 or 1953
I have attached a couple of photos. The screw is just above the main drive rod

20190202_143338.jpg20190202_143349.jpg

Any help would be appreciated,
Thank you,
Robyn
Offline Br502362  
#2 Posted : 03 February 2019 17:43:32(UTC)
Br502362


Joined: 05/03/2014(UTC)
Posts: 568
Location: Finland
Hi Robyn,

If you mean the place pointed with yellow arrow then I think that there is only a pressed rivet
like in the place pointed with red arrow.

F800.PNG

-Åke-
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Offline Robyn Boyd  
#3 Posted : 03 February 2019 19:10:57(UTC)
Robyn Boyd

United States   
Joined: 25/11/2010(UTC)
Posts: 23
Location: everett, WA
Ake,
You are correct on the location - So this isn't a screw but a rivet. If that is the case, are these available and how hard is it to replace? Or ist the loco destine to be a display piece the rest of its life?
Offline Br502362  
#4 Posted : 03 February 2019 21:19:22(UTC)
Br502362


Joined: 05/03/2014(UTC)
Posts: 568
Location: Finland
Robyn,

I haven't seen that rivet in parts list.
It won't be easy to replace it but not impossible.

I think that on could make that rivet from suitable Märklin screw and shorten it. Mount from outside and carefully hammer it flat from inside but you must dismantle the rods first offcourse.

I am sure that here are better mechanics in the forum than me who could also help with this problem.

Cheers
Åke
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Offline Br502362  
#5 Posted : 04 February 2019 14:41:49(UTC)
Br502362


Joined: 05/03/2014(UTC)
Posts: 568
Location: Finland
Hi Robyn,

I found complete rod assemblies from ebay but the price is ridiculous high :

https://www.ebay.de/itm/BJ429-0-...edec8:g:rA0AAOSwu-JamXFs

Åke

Offline jvuye  
#6 Posted : 04 February 2019 15:01:56(UTC)
jvuye

Belgium   
Joined: 01/03/2008(UTC)
Posts: 2,629
Location: South Western France
Originally Posted by: Br502362 Go to Quoted Post
Hi Robyn,

I found complete rod assemblies from ebay but the price is ridiculous high :

https://www.ebay.de/itm/BJ429-0-...edec8:g:rA0AAOSwu-JamXFs

Åke




I have a left side assembly, would have sent it to you if it were the proper one! Wink

Better buy stuff from a reputable supplier. Don't need to buy both sides.
F800 Right side mainrod +valve gear

However, I would first try to ask a local jeweler , they have normally that type of rivets and appropriate riveting machines
You may have to separate the mechanism from the loco

If needed I'll scan the old parts sheet for you.

Also try my old friend Scott at Helmut's Hobbies

Good luck
Jacques Vuye aka Dr.Eisenbahn
Once a vandal, learned to be better and had great success!
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Offline JohnjeanB  
#7 Posted : 04 February 2019 15:12:36(UTC)
JohnjeanB

France   
Joined: 04/02/2011(UTC)
Posts: 470
Location: Paris, France
Hi

Simply by saying you look for F800 spare brings a higher price (simply mentions "800" costs youBigGrin ).
An equivalent to the F800 is the 3048 (manufactured for many years) and the price drops to 24 to 35€ and this is a fair price.
https://www.ebay.de/sch/i.html?_odkw=marklin+3048+gestellstange&_osacat=0&_from=R40&_trksid=m570.l1313&_nkw=marklin+3048+gestange&_sacat=0

Another solution if you have only one rivet problem is either to make it from a brass nail, using a Dremell-like tool or to buy it.
Such small rivets are not easy to find because of the low price (you would have to buy loads of them).
The german word is "marklin Gestänge Niet" (Rivet for Märklin linkage)
Cheers

Jean
My lay-out videos
General operation
Loco change
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Offline W3Machinist  
#8 Posted : 04 February 2019 19:57:22(UTC)
W3Machinist

United States   
Joined: 19/01/2019(UTC)
Posts: 33
Location: North Carolina, Locust
Originally Posted by: Br502362 Go to Quoted Post
Hi Robyn,

If you mean the place pointed with yellow arrow then I think that there is only a pressed rivet
like in the place pointed with red arrow.

F800.PNG

-Åke-


If the rod is not falling off of the rivet, a short term repair would be to remove the assembly. Place the questionable rivet on a piece of steel(anvil) then get a fine point punch(prick punch). Place the punch in the center of the rivet and strike a light blow with a small hammer. Check tightness of rod to rivet, repeat as needed until you are satisfied. Small blows will move metal.

Best wishes,
WoodyThumpUp Smile
thanks 2 users liked this useful post by W3Machinist
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