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Just put in new parts and orings in my model tu-216-2330 pinner and it fires every time but the plunger hammer is nt going back up so it can reload. please help

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  • Air Tools & ... Master
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The driver will not return if the new oring on the piston is causing too much friction. The piston should move easily up and down the cylinder, however should not drop down the cylinder under its own weight. If too tight, use old piston oring/seal. If the piston is not too tight, then air must be leaking out between the driver blade and driver guide washer under the lower bumper. If the washer seems to be good (washer with slot cutout) but you suspect that air is leaking past, cut small circle of rubber (tire tube) and with sharp knife cut slot into rubber so that the driver fits snugly thru. Place the rubber washer on top of the metal washer for better seal and retest. Good luck

Posted on Dec 11, 2014

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Posted on Jan 02, 2017

comax
  • 154 Answers

SOURCE: N80CB - Coil Framing Nailer firing plunger stuck

There is a number of reasons that this will happen. Is the driver (plunger) physically stuck? Take a small screw driver and see if it can manually be pushed back. It may also be a broken head valve spring, or a stuck head valve (you have to remove the rear cap to get to these parts) Maybe this unit just needs an O-ring kit. Try these things and let me know

Posted on Apr 14, 2009

  • 1383 Answers

SOURCE: i have a T31 pinner and the top valve is broke

I have been buying Bostitch t31 parts on ebay. Rebuild kit usually about $22 - 39 depending on how luckey you are at bidding. Keep searching on Ebay for other parts for this gun as parts are not available at Bostitch.com any longer. The oring kit for the N60 is available at amazon.com. the part number is ORK1, cost under $20. You can also find bargains on ebay. When installing orings us silicone grease. It is available at lowes in the plumbing department. It looks like vaseling. It is used for lubricating orings in faucets. Good luck on your repair project.

Posted on Mar 04, 2009

  • 57 Answers

SOURCE: grex p635 leaking air when I hook up pinner it doesn't pin triggrr just leaks air

Sounds like the recoil is jammed. Take it apart & clean it up. Look for damaged seals.

Posted on Apr 04, 2012

H2_Brad
  • 425 Answers

SOURCE: bt200 only exhausts

Here is a parts diagram. You may want to remove the four, top allen screws and pull off the head. Turn it upside down and with your thumbs push on the head valve assembly (items 9 and 10) and make sure it goes up and down freely. It is spring loaded (item 8). If it gets stuck it will blow air out the exhaust. Also a bad seal between it and the cylinder will cause the same thing.

When reinstalling the head assembly I push down from the middle of the head as evenly as possible to compress the head valve without cocking it and having it stick. I then hold the head with one hand while putting the screws back in with another. I use t handle allen wrenches. Also always lightly grease (or coat with air tool oil) any new o-rings you install. You don't want to run them dry. I use a tub of white lithium grease because I do so many. If you knew this already I apologize but it may help others that read this.

Bostitch BT200 parts diagram

Posted on Aug 22, 2012

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I believe that the most popular roofing gun for professionals is the hitachi line of nailers. Hitachi guns are amoung the very few however that actually move the cylinder when fired instead of the headvalve. This is rather odd because it requires more moving parts. Your guns have a trigger pin/plunger (white plastic with small oring part # 878-121) that pushes on a urethane ball. This ball is potential cause of leaks. Make sure that the ball is perfect. Replace as needed. Most leaks around the trigger area are acutally coming from just in front of trigger which is plunger pushed by safety foot. Spray soapy water around trigger area and make sure where air is actually leaking. If leaking from safety foot plunder source of leak is actually orings inside of gun around cylinder. (usually oring part #876-161 that fits on the cylinder plate). Parts and parts lists are at www.toolpartsdirect.com. Good luck with your guns and post again if you have other question.

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I just rebuilt the nail gun with all new o-rings and gaskets and when I put the air to it air actually blows the rubber boot off the plunger on the trigger assy.


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I have a T31 pinner and the top valve is broke and an N60 15 gauge nailer that needs oring


I have been buying Bostitch t31 parts on ebay. Rebuild kit usually about $22 - 39 depending on how luckey you are at bidding. Keep searching on Ebay for other parts for this gun as parts are not available at Bostitch.com any longer. The oring kit for the N60 is available at amazon.com. the part number is ORK1, cost under $20. You can also find bargains on ebay. When installing orings us silicone grease. It is available at lowes in the plumbing department. It looks like vaseling. It is used for lubricating orings in faucets. Good luck on your repair project.

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