The claw couplers are normally held in with a screw, so replacing them is simply a matter of finding and undoing the screw.

Not sure if the 56101 couplers are held in with a circlip, but it seems the spring is needed.

56101 description

"Detailed miniature reproduction of the original prototype coupler as used in real life on the railroad. Works like the prototype. With mounting spring. Contents 10 pieces. The standard 1 Gauge models produced since 1987 can have the regular claw coupler replaced with this reproduction prototype coupler. This coupler looks and works like its real life prototype. Running a train with this coupler usually requires a very wide minimum radius of 3.0 to 3.5 meters or 118" to 138", depending on the models. Current standard 1 Gauge models that can be retrofitted with this coupler can be identified by the symbol shown below."

Only a picture of them.

I know that a similar coupler on my KM-1 G1 loco was held in with a circlip. Is there a notch on the end of the coupler shaft?

It looks like from the picture that the 56101 couplers have a square shaft, which should fit into the square hole left from the removal of the claw coupler.

I would think the spring goes on the outside, and the circlip fits on the end of the coupler shaft inside the loco frame to hold it in place.

I'm guessing somewhat here, but that's how I think it works.

Hi Bob,

These pictures come from two different loco-instructions, but at cars it's the very same. I think they explain what to do:





Regards

Markus

Many Thanks Markus,

That explains the couplers that are Body or buffer mounted. Not sure if it covers all. I will have to look again at some other cars.

Great Diagrams! Thanks again.

Bob

I just bought some of these and the clip is at the end of the spring. The instructions make it look easy, but they are a nightmare to install. If anyone wants some help, I can post how I finally did it. If you know an easy way to do it, please post.