I have 351.181720 and the driver does not return. I've had this for years but it has not seen extremely hard use (probably less than 500 brads). Suggestions. [email protected]
SOURCE: air allways and continually leaks forcably from the top. Bostitch
This nailgun has several parts to the headvalve that must fit together properly to seal. Go to WWW.toolpartsdirect.com for a diagram of this tool. The part called the diaphragm is source of problem. It has thin vinyl walls that will fold over when you assemble. The piston will not cause the gun to leak, just make sure that piston fits snug into the cylinder. Loose oring on piston will only cause low power or the poston may not retract all the way back up. Some piston/drivers had a plastic ring instead of an oring. The plastic ring had a secondary oring under, however not necessary. You can use rubber or plastic, just make sure that the piston is not too tight or too loose. The piston oring is the only oring in the gun that can be cut to fit. It is like a piston in a car engine. The piston rings have a gap.
SOURCE: CRAFTSMAN NAILER
Generally, if your nailer is not leaking air, the orings are probably ok. Remove the head and check for stuck headvalve or stuck driver/piston. Make sure that you can press the headvalve into the head with your thumb and that it returns. If your driver/piston is down when you pull the head, remove the cylinder and check for damage to it or the bumper. Some cylinders have an oring or strip of rubber about med section which acts as a check valve causing the piston to return to top. Check for bent driver or broken tip causing driver to jamb. Use silicone lube to assemble. Enjoy
SOURCE: brad nailer not firing nail...can hear brief air noise upon pulling the trigger
Porter cable makes a number of brad nailers (18 gauge) that very quickly suffer from the problem that you are having. You did not mention the model number of your gun but if it is one of these, (bn125a, bn200a, ns100a) kit # 60061 will fix the problem. It costs between 25 and 30 dollars. Google that part number or order from www.dewalt.com. Dewalt owns the porter cable brand. Before you order the kit, check that the driver blade is not bent and stuck. The driver should travel freely down the cylinder. When you install parts, use Danco silicone grease to lube (availabel at Lowes in the plumbing department) If your model # is different from those mentioned above, please email me and I will recommend a repair.
SOURCE: Need an owners manual
SOURCE: My Sears Craftsman 18 gauge brad nailer won't nail
Your driver is not returning. Depending on the model that you have there could be a couple of problems. The most likely is that your piston stop is crumbled and some of your seals are worn or damaged. Whether or not you can fix the nailer depends on if the parts are available from Sears Parts Dept. If you would like some more information about fixing your nailer please post which model it is that you are trying to fix and I can see if the parts are available. I will post the information back to you.
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At the back of the nail gun there is a cap and 4 screws. Take out the screws and you will find a diaphram, o-ring, and spring. The plastic housing that holds everything together could be cracked or the spring could be broken.
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