This unthreaded trigger valve assembly is a genuine OEM assembly used in nailers. It includes the trigger valve, 1 rubber washer, and 3 roll pins. The trigger valve controls the flow of air in the tool which drives the piston and creates the nailing action. If the valve becomes stuck, the seals wear down, or the trigger breaks the nailer will leak air, struggle to fire, or not fire at all. Begin the repair by switching off the tool and using a push pin to remove the trigger. Remove the roll pins that secure the trigger valve and pull the trigger valve out of the housing. Insert the new valve into the housing, install the pins to hold it in place, and secure the stay pin with the washer.
I replaced the Trigger Valve Assembly, the part came with easy instructions, which I followed. On the Porter Cable nail gun I just had to remove the pin that held the actual trigger in place. Then I used that pin as a punch to remove one roll pin that secures the Trigger Valve Assembly. After driving out the roll pin I pulled out the Tr
... Read moreigger Valve Assembly and re-installed the new one. Just align the grove in the assembly to match the position of the roll pin, which secures the assembly in place. Then re-position the trigger and install the pin.
1 - Removed 2 roll pins that held safety mechanism using a small punch and hammer
2 - Removed trigger pivot pin, releasing the trigger and the spring behind it
3 - Removed 2 roll pins holding trigger valve.
4 - Inserted new trigger valve, being to to fully seat it and align it according to the enclosed instructions
... Read more>5 - Inserted new roll pins to hold trigger valve - gently tap in with small hammer
6 - Re-installed the trigger and spring behind it
7 - re-installed the safety mechanism using original roll pins
Problem Solved!
1. The trigger replacement was a separate issue. it is possible that the rubber grip had slid up on the handle and interfered with the trigger operation. it was very hard to pull the trigger fully to shoot. All good now. item came with basic instructions. 15 minutes.
2. The piston grip/bumper was the top percentage suggestion
... Read more for the driver not returning.Make sure you enter your exact model number for recommended repairs. I didn\'t, the first time. It WAS cracked. after removing the rear housing to access the bumper I had to tap the cap for the stuff to come out. when reassembled there was a spring loaded tension on the cap. you have to push in about 1/2 inch to get the bolts started. I recommend you purchase a new rear cap gasket. a tiny flake of factory paint adjacent to the gasket come loose and there was a leak after reassembly. 45 minutes.
Remove roll pins. Removed none threaded valve with paint can opener, and replaced with new one.....
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