Trigger issue? What's included : (1) Replacement BOTTOM FIRE TRIGGER 5140030-09 New, bulk packaged Please refer to list below for compatibility Compatible with the Following Models: FR350 Type 1 Nailer , FR350 Type 2 Framer What's included : (1) replacement BOTTOM FIRE TRIGGER … make sure you have a filter in-line with the air … This is a genuine Porter Cable replacement part, sold individually. Genuine OEM Replacement Part 5140030-09 Compatible with Porter Cable FR350 Framing Nailers. Repair is fairly easy, requiring a small hammer and a … Pull back on the brass ring of the connector. Hi Dennis, if it is hissing air … If it does not, the air is not reaching the gun. To do this, locate the end of the air hose where it is attached to the nail gun. It needs to be depressed before you can squeeze the trigger to fire a nail. Dennis for model number FN250C asked on 2019-10-06. The PORTER-CABLE Service Network is unmatched in the industry and includes over 70 factory-owned locations and more than 1,000 PORTER-CABLE authorized independent repair shops, which has your back when a tool goes down. When I pull trigger, it hisses air but will not fire. The Trigger Valve Assembly regulates the compressed air via the trigger to your Nailer. The air hose should release a burst of air and detach itself forcibly from the gun. Unless you have a compressor valve shut on the air-line or no air in the tank it is probably the safety trigger on the nose of the gun. How to Install a Driver Maintenance Kit on a Porter Cable Nail Gun. Use the form below to search for an authorized PORTER-CABLE … • Air leak through the top head exhaust port • Nothing happens when you pull the trigger • Air leak through the trigger • Driver will not retract back into nailer • Nailer is sluggish and has little power • Fasteners will not countersink Air leak through the top head exhaust port • This occurs usually due to a head valve leak. Remove the nail gun from the air hose.