Removing Diana Original Cog Wheel Holders

[Benelli B76]

Model 10 getting the same treatment. Front and rear piston seals both were intact but cracked into pieces when removed. Cog wheel holders undid by hand!!!

Steve

Are you also using a compression piston seal on the rear balance piston ?

Baz

[Mobiasstrip]

Are you also using a compression piston seal on the rear balance piston ?

Baz

Good spot Baz, the photo I posted shows two compression seals that I had already. Was awaiting the rear from Knibbs I think. Different colour for some reason. Here are the internals prior to assembly. Steve

[Benelli B76]

Thats better, the correct buffer seal which does not compress air in the rear chamber.

Baz

[abellringer]

Yes, I stopped using the "correct" seal when I realised they let the actual piston body run on the cylinder wall; as an engineer metal on metal isn't good.
The actual seal type makes no difference to compression because the rear piston has a hole in it, so vents to atmosphere, the rear piston doesn't run metal to metal, which I prefer. Have to say stunning photos though.