A couple of other tips.

I have always taken the liner out first (I am not sure of you can do it without doing this - never tried) -- and is usually easier with a little heat on the cylinder (heat gun etc.).

When you put it back together remember that there is a key in the piston where the join in the piston ring needs to go to stop the piston ring rotating. Given the number of inlets/outlets on the 140 it is not a good idea to have the ring able to rotate and get caught . . .