Hw35 Leather or synthetic piston seal ?

[Shed tuner]

Hi Jon.

I normally machine the front face of the leather sealed piston back to expose more rod, then thread the rod and screw on an alloy adaptor for the synthetic seal, so ending up with 71mm stroke --- this also involves extending the cocking slot in the piston rear wards a tad to gain clearance.

A 71mm stroke is about as much as you can go without altering the woodwork and running into other cocking problems.

If you machine the front of the leather sealed piston as you describe you'll run into cocking problems due to the stroke and you'll find you have to extend the piston slot that far back you'll break through the skirt.


All the best Mick

Sounds perfect, thanks mate; I think I'll be doing exactly this over the xmas hols when the hubbub in the house gets too much for me

(sorry for the slight threadjack Les )