Hello, thespaniard:
Please check your PM's.
As for disassembly:
You will need a set of gunsmith bits to avoid damage to screw slots.
For lock removal, place hammer on half-cock and remove front lock PLATE screw ahead of the hammer and the rear lock screw from the opposite side of the stock. Be careful to GENTLY TEST for lock plate contact with the inletting. If TIGHT in the wood, heavy-handed wiggling can lift a nasty wood splinter at the tail end. Try to wiggle it with the hammer or see if the rear lock plate screw can be inserted two turns and gently tapped with a wooden dowel to push the lock plate tail a LITTLE. Approach this as if you are dealing with your eyeballs. Sorry.
Lubrication can be applied without lock disassembly. A drop of good oil is enough. Then carefully cock the hammer and put a small dab of moly grease on the bottom of the tumbler for the sear to carry into the notch. No excess oil. If it runs onto the wood, that can weaken the resins and make the wood mushy, over time.
Smiles.
El Supremo/ Kevin Tinny