Pictorial: C4 Trigger Mechanism Maintenance , By Claudio Araujo PART 1

I want to thank Brazilan diver Claudio Araujo for sharring this great tutorial with the readers of the Underground waterman,this is a must read for all C4 customers

Part 1

Here's a tutorial on how to maintain the C4 trigger mechanism.

Required tools: grease solvent, white lithium grease, 1 phillips head and 1 flat head screwdriver, 1 brush









Step 1: Remove the 4 screws that secure the trigger mechanism to the carbon body of the gun

Step 2: Use the flat screwdriver head to carefully dislodge the trigger mechanism case from the slot without damaging the carbon. The case will be snugly lodged in the slot as the tolerances are minimal. It helps to apply Silicone spray at the case edges to more easy dislodge it.















Step 3: Once the case is out, the first pin that must be removed is one on the top right of the case. This is the pin that hold the main component of the mechanism. Push the pin to remove it.












Step 4: After the top pin is out, use the flat screwdriver to raise the main spring of the mechanism. The top component of the mechanism will slide right out.











Below is how the main mechanism component looked after 2 years of use... the surface rust comes the spring steel South African shaft I was using. I have since changed to a SS Mori shaft.

Below is how the shaft locks to the mechanism... notice the pivoting sear. Italian engineering at its finest and one of the reasons why the C4 trigger is so smooth

Note: Before moving to the next step, take a good photo and make mental notes of how the trigger spring and titanium trigger are arranged against the main spring of the mechanism before removing them

　

to be continued on Part 2