DA250B Porter Cable Nailer - Overview

This o-ring is a genuine Porter Cable replacement part, not imitation or overstock. O-rings are made to contain thousands of PSI pressure by creating a seal between two or more parts. O-ring measurements are defined by the inside diameter and the thickness. There are many causes for O-Ring failure. The most common among power tools a...Read morere: • Extrusion and Nibbling • The O-ring has ragged, tattered edges. These are commonly caused by pressure spikes which shear off tiny "bites" from the o-ring, or caused by clearance gaps. • Abrasion • One or both sides of the o-ring appear rough and slightly flattened. Commonly caused by a contact surface that is too rough, contains grit or is too smooth to allow lubrication. • Over Compression • The O-ring is flattened on both sides and may have a "ring" split along its length. Commonly caused by excessive pressure or heat. • Heat Hardening • The O-ring has a pitted or cracked surface, and is often flattened on both sides. Caused by temperature exceeding o-ring capacity. • Weather/Ozone Cracking • The O-ring is covered in small surface cracks. Caused by exposure to ozone, UV rays and air pollution. Excessive seal stretching (greater that 5%) causes similar cracking.

This is an authentic Porter Cable replacement part. The head valve spring is designed by the manufacturer for use in an angle nailer. This part is made of metal, and is used to apply tension to the head valve or seal. You will require an Allen wrench or hex key when replacing this part. This item is sold individually.

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 ...Read morewill 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.