135 ram cylinder piston

Deane

Member
Have the piston out and need to know if this piston single groove needs both nylon seal and o-ring or just one or the other. Only has seal on it , no o-ring.
 
The rubber o ring goes in first, and then the sealing ring goes on top of the rubber ring. I heated my Teflon ring ring in boiling water for 3 or 4 minutes to make it soft enough to slip over the rubber ring. Then let it sit until it shrinks back to shape. Use a piston ring compression clamp if you have one to get it back in the cylinder after lubing it and the cylinder good. It is a very tight fit.
 

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