Hello!
A oscillating engine slightly leaking is natural and allowed. J. Hemmens engine is very well machined and should not leak . The one I have works fine with normal minor condensate leaks : 45 psi with a 2 1/2’' 3 blades propeller in an Orion moulding hull.
Now, if you cannot see the engine running because surounded by the steam, there is a slight problem !
It would be easier if having some figures and a pic of the plant running to have a better idea.
On my side , I can see 3 reasons for the engine leaking:
- Leaks from the 4 way valves distributor >>>>>>>>> dsimantled and check for dammage of the O’ring = change and check for scratches
- Leaks from the piston shafts >>>>>>>>> tighten the stuffing box or insert new packing eventually.
- Leaks between the cylinders and the main body (apparently Seacommander issue) >>>>>>>>> Misaligment = stiff point when turning = dismantle
and align.
-May be caused by damaged surfaces of the mirrors: scratches. = dismantle and re-surface it with marble or >1000 wet sand paper grain.
Re-align properly. (doubtfull if the engine has not been dismantled)
-It may also simply come from a generous steam supply and the engine cannot take it all . Steam oulet undersized or partially plugged. Do
a test with no exaust pipe and check again for leaks.
Use a good heavy oil for a better sliding. ((see proper post and discussion on this matter) . We can read somewhere that the steam is enough to lubricate. Comics are everywhere! I would say that everything has a sliding coefficient (even cement) but so far we did not fine anything better than mineral oil to lower frictions at 140 °C in our installations.
Maybe someone will have another idea for the benefit of all.
Hoping that this will help….
Kind regards.
https://youtu.be/ezKauubx8GM
