| I disassemble all of the assemblies and clean the metals parts 
                  with Bleche White and/or a Scotch Brite pad. I always install 
                  new coil sleeves and inspect stops, plungers, and arms for any 
                  damage. All of these assemblies should move freely when you 
                  re-assemble them. If they don’t you did something wrong 
                  and need to work on it. Most of these metal parts just need 
                  a good cleaning and don’t need to be replaced.
 
 Some like to buy brand new assemblies instead of cleaning them. 
                  I figure I save an average of three to four hundred dollars 
                  a pin by cleaning instead of replacing. When I’m done 
                  the assemblies function like new.
 
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