Question about Stanley Bostitch N88rh Framing Nailer Driver Piston 158582

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When I connect my nail gun air leaks from around the piston area faster than the compressor can refill

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Sounds like the gasket has had its day, take the head off and and have a look, or somtimes they come lose

Posted on Jul 30, 2010

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6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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1 Answer

The gun had a slight air leak at the trigger. The repair shop put in an o-ring kit. Works great on their shop compressor. Plugged it into 2 different portable compressors and air leaks continuously from...


Roger, what PSI are you running on your portable compressors? Sometimes these guns will not operate properly if there is not enough air pressure. I have seen some guns that if the air pressure is too low that they will not seal up properly and act as if there is a leak. If you can adjust your portables make sure that your setting is at least what the minimum setting for your gun calls for and then adjust upwards if you need it to drive deeper. Hope this helps.

Jul 22, 2014 | Hitachi NR83A2 Framing Nailer Full Head...

1 Answer

Misfires new gun


If your using refills that have wire holding the nails together.
Check to see if bits of wire, debris is collecting in around the striking hammer. I switched to paper and never looked back. Must have gone through 5k worth of nails and rarely jams. Other things to check,
1. Check the striking hammer, make sure it is not bent or damaged.
2. Check air pressure, Low pressure can cause jamming, misfires.
3. If the tool needs pneumatic oil, 2-3 drops before you start good rule of thumb.
4. Check spring return. Sufficient pressure must be maintained or the nails will not feed properly. Misfires, incorrect feed, jamming etc.
I had a Hitachi brad nailer and it was horrible. Fire 1 brad nail would jam or misfire. Did everything I could think of nothing worked. Put it up, got a Rigid brad nailer and never looked at the Hitachi again. :)
Sometimes you just get a lemon! (PS I understand you have a framing nail gun. Brad nail gun above is used for an example)
Hope this helps

Mar 24, 2014 | Hitachi KNR90AE Round Head Framing Combo...

1 Answer

Hitatchi nv45b2 trigger leaking


Air leaking around the trigger area could be caused by vinyl ball / gasket under trigger valve bushing or orings within the gun. Easy test, remove nails and connect air (assuming that air is now leaking around the trigger area). Depressing the trigger stops the leak, replace vinyl ball. Depressing trigger does not stop leak, move plunger b (plunger B, small shaft under bubber bushing next to the trigger valve) with your finger in then out to determine if air leak changes tone. If air leak changes sound or tone, then air is leaking past orings of the cylinder guide and/or cylinder plate and/ or the cylinder itself is scratched by debris where the orings make contact. Pull out the cylinder and examine the contact areas. If scratched, use 300 grit paper to smooth, if smooth, however, suspect the orings of cylinder guide (or cylinder guide is cracked). The cylinder guide is difficult to remove and install without causing damage to guide or cutting new orings when installing. Do not remove the guide unless all the other options have been checked. One last bit if information, I have noticed that some guns will leak air if the orings on the feeder piston do not fit snuggly. Make sure that leaking sound is not coming from feeder area (remove the basket and feeder/feeder pin/spring and pull out the feed piston, making sure that the largest oring is making good contact within the cylinder). Good luck with repair.

Sep 28, 2012 | Hitachi NV45AB2 Roofing Coil Nailer

1 Answer

What causes it to shoot a double, or triple nail sometimes?


Make sure that orings are in good shape, lower bumper not cracked, (no leaks and the driver/piston stays at the top position, if piston drops a little or all the way down with no nails in gun, replace piston oring). Also check spring tension for feeder and two check paws in the door (feeder tension should be firm ). Adjust the timing screw up or down one or two turns and test (timing screw at the top of safety foot, head of screw pushes on the firing valve ). Test for lower bumper cracked. Remove nails and leave side door open. Hold the nose of the gun against coiled air hose or thick rubber and press and hold the trigger. The piston will stay down against the bumper until you release the trigger. No air should leak out the driver path. If air leaks past driver suspect bad bumper. Test action of feeder piston. Remove side cover to feed piston and clean debris. With air disconnected, move the feed piston back and forward. There should be a little resistance, if it moves very easy, suspect orings worn. As soon as you connect the air line. the feed piston should move forward with force, note the position of the feeder. Now with air disconnected, place nails on the feeder. The first nail should be well within the path of the driver. If not fully under driver path suspect worn feeder / feeder retainer pin, or debris inside feed piston chamber preventing piston from full forward travel (debris from inside of the gun will enter the feed piston chamber usually broken bits of lower bumper). Replace parts as needed. Good luck with your repair.

May 17, 2011 | Hitachi NV45AB2 Roofing Coil Nailer

1 Answer

My 602 is passing air from the hammer area in between nail driving,is this normal?


Air leaking past nose of gun during shot is indication of worn/cracked lower bumper. Remove head and pull piston; examine bumper and replace as needed. Air leaking thru nose when airline is connected is indication of leaking cylinder spacer orings (time to reseal gun with oring kit). Parts are available at www.toolpartsdirect.com. Good holidays

Dec 28, 2010 | Senco FP620 Framepro 602 2" - 3 - 1/2"...

1 Answer

I have Bostitch RN45 coil nailer. It sometimes does not feed nails. When I open the magazine the driver blade has not retracted. Gun does not leak, o-rings in drive section look to be in good shape and...


Causes of piston not retracting are as follows. Cracked /worn bumper, if cracked air will leak between piston and bumper. Try test, remove nails and dry fire gun against rubber or soft wood; depress trigger push gun against wood/rubber and hold in this position. Piston should stay down and no air should leak past nose. Worn piston oring, piston should not slide down cylinder under its own weight. Loose or missing check seal, remove cylinder and look for black rubber band around series of holes. Band should be in place and fit snuggly. Good luck

Oct 20, 2010 | Stanley Bostitch Rn45b1 Industrial Coil...

1 Answer

Hi, i got a hitachi nv45ab and My nailer leaks air out the back


Hitachi nv45 series is the most popular line of nailers amoung professional roofers. There are three areas that develop leakes. Leak out head vent indicates cylinder stuck in lower position or headvalve worn. With air connected, gently rap head of gun against rubber mat to move cylinder to position. (Use caution not to damage head). If this action works, gun needs cleaning internally or lack of oil. If air still leaks out vent remove head and examine valve in head and replace as needed. Check that cylinder moves freely up/down (travel aprox 1/4"). If cylinder is hard to move pull cylinder and clean replacing orings as needed. If leaking around trigger, remove rollpin and trigger and check nylon ball for pits and replace as needed. If leaking around base of gun check for loose bolts and/or worn gaskets. Remove nail canaster to check feed piston gasket and screws. Good luck with your repair and post again if you have other question.

Aug 04, 2010 | Hitachi NV45AB2 Roofing Coil Nailer

1 Answer

My dewalt framing nail gun was hooked to the air compressor, but was not being used when it began leaking air which you could hear and got louder. It sounded like it was leaking around the trigger area....


There are O-ring seals around the trigger that are probably leaking. You can try to lubricate the gun by adding the pneumatic oil to the air supply. That may be enough to seal it back up. Otherwise the seals and/or the trigger assembly will need to be replaced.

Dan

Mar 29, 2010 | Dewalt Round Head Framing Nailer D51845

2 Answers

Paslode air framer not sinking some nails


Your air pressure is dropping everytime you fire. It sound like your compressor is not cutting back in untill it to low. Not giving your tool enough continuess pressure. Your compressor cut in pressure should be around 90-100psi no less. and your max. pressure no more then 120psi. (Make sure your regulator is set at 110psi)
good luck...!

Aug 11, 2009 | RTO Paslode #650027 2500CT Placement Nail

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