How to take apart a chain coupler
 

This is off topic, but maybe someone can help.

Does anyone know how to take apart a chain coupler?
Mine is on a Bobcat skidloader model 610.
I can not find anything on the web except a picture at:
http://www.mckenzieltd.com/excavator...tor_manual.pdf
Look at the pciture in this PDF file and search for the words "motor
chain coupler half". (page 10) There is a picture on page 9.

Anyone know how to dismantle these?

Thanks
Alvin