SOURCE: DA250B air nailer leaks air, piston stays down
Your nailer has a collar /vinyl seal that should be installed on the head valve and seats against the cylinder. The seal should fit very snugly on the headvalve. The plastic cylinder must not have any nicks on the surface or be out of round. The head valve has an upper bumper that needs to be inspected for cracks. To test the orings in the head for leaks do the following. Push in the headvalve with your thumb till it hits bottom then cover the small hole at the mating surface of the head with finger then release headvalve. Suction should hold the headvalve in for a moment. If no suction, replace the orings. Parts and item list are at WWW.toolpartsdirect.com . Enjoy
SOURCE: PORTER CABLE FR350 FRAMING NAILER RAPID FIRES
I have seen this problem on several brands of nailers. The solution in most cases was to make sure headvalve orings are sealing correctly. Here is a simple test. Remove the head and place on workbench with gasket surface facing up. Push headvalve all the way in with your thumbs then cover the vent hole with finger and release thumb pressure to headvalve. Vacuum should keep headvalve down untill you release finger at vent-hole. If vacuum does not hold, remove headvalve and examine surfaces for fine scratches and/ or make sure of correct size orings (headvalve should be very snug). Remove scratches with extra fine paper (300-400 grit). If headvalve holds, remove headvalve piston and piston stop. With headvalve spring removed, push piston stop into headvalve and make sure that the piston stop fits snuggly into piston. Also make sure piston stop is not damaged or cracked. A loose fitting piston stop will cause multi-fire. Replace as necessary. Upon re-assembly, lube all rubber parts with plenty of silicone lube (not oil, wipe clean all parts before lubing). Silicone paste/grease is sold at Lowes in the plumbing department (Danco Brand). Good luck and email if you have other questions about this gun.
SOURCE: central pneumatic air nailer leaks air around
Probably needs the trigger valve rebuilt/replaced. Contact Harbor Freight for replacement parts.
SOURCE: When pulling trigger air blows but does not fire
I have the same problem and found the fix. The angled bar from the foot to roughly the trigger is not pushing the trigger release in far enough. If you push the relase in manually, it will fire. Then you can adjust it accordingly.
you have actually o-ring around a piston as well, check all seals and rubbers for damage
go to this page and download exploded view in pdf format, download is located in upper right quadrant:
http://servicenet.portercable.com/products/detail?productnumber=pin138
if you need adobe reader to read the document:
http://get.adobe.com/reader/
do not install any junk which adobe try to bestow on you, especially they antivirus, alternatively get that one:
http://www.foxitsoftware.com/secure_pdf_reader/
same remarks - no junk...
if you find answer helpful - do not forget to vote...
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