Hello and welcome to Marklin,

For starters, I'm attaching a well written document that provides condensed information on the various couplers in use. As a first step, you should identify what you have and then, based on your findings, plan to standardize.

Cheers,

Close Couplers for H0 Models.pdf (6,251kb) downloaded 42 time(s).

Thanks for the info on couplers. Very good with the pictures showing the difference. I think you can add this to your excellent post.



Fleishman profi (flp)
+ works well with c-track uncoupling track
0 A tiny bit more forgiving to uneven track than Roco short
-The knob under may catch high pukos on k and c-track.
+ pretty good looking and one of the smaller couplers

Roco short (rs)
- it’s a hit or miss with c-track uncoupling track
- will fatigue over time
- may open under very high load


Both: flp and rs
+ Won’t catch the buffers so a very safe option
+ will not be stuck when opening the couplers
- Require considerable more force to couple than Märklin short, sometimes resulting in chasing that wagon.


Märklin new short couplers 72000
+ requires less force to couple than flp or rs
+ if coupled correctly it holds, and is much less prone to uncoupling on uneven track than the others including Relex
+ works well with uncoupling track, but Relex are the best in that aspect if you want to push the wagon with an open coupler (the hook on the latch)
0 The new Märklin short couplers is lower than the previous version but still no where nearly as low as flp or rs
- sometimes it may still be stuck when uncoupling
- the opposite sometimes happens, couplers stuck but is not locked and it will be a nasty surprise when it suddenly becomes unstuck, specially on an uphill slope or in a tunnel
- if the loops are at the exact same height it won’t lock