Let me see if I can get this right from memory.
Step 1, remove grips
Step 2, cock the hammer. Then place a pin (bent paperclip will do) through the hole in the rod that holds the hammer spring and gently lower the hammer. Now the pressure is off the spring, and you can remove the rod and spring as one piece.
Step 3, pull the hammer back half way and use a punch to push out the hammer pin/plate from the left side to the right. It should come out pretty easy. Now you can remove the hammer
Step 4, look down into the revolver through the opening where the hammer was. Use a punch or very small screwdriver and stick it all the way into the opening, pointing almost straight down. There is a spring-loaded tab down there that holds the trigger guard in place. Get the head of the punch on it, and pull the punch towards the grip of the gun and this will depress the spring and allow you to remove the triggerguard and trigger altogether.
Step 5, swing open the cynlinder and pull forward out of the gun.
Assembly is in reverse order. Pay attention while performing the steps and getting it back together won't be hard at all.
Good luck!