20 Most Recent Senco FP18 FinishPro 18 - Gauge Brad Nailer, 5/8" - 2" Questions & Answers

I just had the same problem with mine. Exact same symptoms. My guess is that your gun hasn't been used in a while. I called Senco and they recommended removing the top cap, removing all o-rings (one at a time) gently stretch them, put a small amount of lithium grease in the o-ring track, and replace the o-rings. This fixed my problem and I hope it fixes yours! Senco has awesome tech support for their tools. I will not buy another brand because of their support. 800-543-4506

The internal workings of a pneumatic nailer are fairly simple and easy to diagnose problems. If you go to Senco's website at www.senco.com, you can find a breakdown of what parts are where inside your nailer. Remove the four bolts holding the cap on and check the condition of the o-rings inside the gun. They are the most likely failure point for your tool. Senco does make repair kits that contain all the wear items in your nailgun. It will be listed on the parts breakdown and can be bought at most online parts stores or places like eBay and Amazon.

2 possibilities1 trigger valve needs replacement, piston not fully retracting every time2 feeder spring needs replacement, less likely but possible

need to rebuild. the kits are about $15

If you diodn't replace the driver look at it. there might be a burr on it or also one where it slides in and out. Sometimes if it jams a nail or a piece came off of one it will lodge there and cause problems. This has happened to me in the past.

I have a SENCO FinishPro18 that I inherited from my son when he died a year ago. It has worked fine till now. It does not shoot a nail when depressed against a board and I pull the trigger. I don't hear air leaking, but it seems there is little pressure. Having taken apart the head, then the base, it all seems in good shape. I have not taken apart the trigger assembly, as the removal is a total commitment. Thoughts? I could use some help.

Do you regularly use air-tool oil placed in the air connection? If it gets a good workout every day, buy an 'inline' oiler that is inserted into the air line which automatically takes care of oiling. Hope this helps!

i would double check the plunger to make sure its resetting after each fire.

on a compressor by the motor or on the pressure switch there will be a overload switch which may have tripped out push this back in and try it it is a black button pocking out the motor or switch buddy get back to me if this doesnt work budd

the seal on the piston requires replacement all seals are o rings and can be supplied by your local bearing stockists also check that the blade is straight and has no burrs

http://powertool.manualsonline.com/manuals/mfg/senco_1/sn4.html?p=1 or User Manual for Nail Gun Senco SN4 download free

i reccomed Inspect the air hose for any bends, twists, or impairments that could be limiting the airflow.

Similar to Paslode problems. Why is my gas nail gun not firing? Possible causes for a Paslode nail gun not firing are: A nail jam is stopping the nails from moving forward. The gas fuel cell is empty, out-of-date or not attached properly. The wrong type of Paslode nails are being used.

Is Your Paslode Nail Gun Not Firing? Common Problems & Fixes

You can check a few things to identify the problem if your Senco FramePro 602 nail gun is not shooting at angles: Make sure the depth adjustment is adjusted appropriately for the material you are dealing with and the nail size by checking it. The cannon may not be able to fire at an angle if the depth adjustment is set too high. Verify the air pressure: Ensure that the nail gun's air pressure is set properly. For the FramePro 602, a pressure range of 70 to 120 PSI is advised. The nail gun may stop working if the air pressure is too low. Examine the magazine for any jammed nails that might be stopping the rifle from shooting properly. If you find any, remove them. Make sure the magazine is free of any debris and unblock any nails that are stuck. Verify the angle adjustment: Ensure that the nail gun's angle adjustment is correctly set for the angle you intend to utilize. The FramePro 602 is capable of firing at 21-degree and 28-degree angles, so make sure that the angle adjustment is set to the appropriate level.