- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
The driver is held on the piston stem by a steel dowel/pin. There are nylon inserts on either side of the dowel to hold it in place. Pry the inserts out and press the pin out to seperate the driver from the piston stem. If you don't damage the inserts, you can reuse them. Bostitch recommends replacing them any time they are removed.
Nailers are made to use in any position so must be something simple to fix. Most likely safety contact foot, to test, remove the nails, remove the trigger to expose the firing button on the trigger valve. Connect air and dry fire onto wood or old coiled rubber hose in various positions. If the gun tests ok then carefully examine safety foot mech. and trigger for loose components missing guide or roll pin. The contact foot must push firmly up on the lever within the trigger thus pushing on the firing button. If the safety foot and trigger are in good conditon and working ok, then problem is within the headvalve and piston orings. To test piston oring, remove airline and nails, point nailer up then down again. The piston should stay in the top position. If the piston moves up /down with movement of gun, replace piston oring. If piston oring ok, remove the head and pull out the headvalve. Apply plenty of silicone paste or white grease to orings on headvalve and reinstall and test. If tests ok, then problem is worn orings in the head /headvalve. You can keep lubing or replace orings. Examine the surface within the head where headvalve orings make contact. If there are many fine scratches, even new orings will not work very well. Try to remove scratches with very fine sandpaper. Good luck
I dont think it is your piston assembly, there is an o ring on the trigger valve assembly that is broken and would need to be replaced, If you need help getting it out let me know and I will guide you thru it. But while you have it apart look for worn o rings and now might be the time to replace them.
If its the stapler I believe it is (SX1838) it has a broken driver. These staplers have a factory flaw in them, the drivers are faulty. Bostitch has since repaired the problem from the factory but their are still nailers out there that have this problem. Sounds like you have one of them, its an easy 5 min fix but you need to go to a Bostitch cervice center in your area and get a fresh driver installed. Your stapler has a 7 years warranty so it won't cost you anything. As a Bostitch service center I have done hundreds of those staplers, once the driver is changed ou shouldn't have this problem anymore.
Lack of oil usually will not prevent driver from retracting (bent driver /debris / worn piston oring / cracked lower bumper / loose check valve ) . Remove nails and push driver up. It should not require much force to move driver / nor be so easy that driver fall back down under its own weight. If driver feels loose, replace piston oring. If it feels about right, most likely problem is the check valve. Remove head and pull cylinder. Look for band around cylinder covering series of holes. It should fit snuggly. If loose replace with new part or use any rubber available or series or orings to fit space. If check seal looks ok then examine lower bumper for missing pieces or cracked. Lube with silicone paste lube sold at Lowes. Parts are available at www.toolpartsdirect.com . Good holidays