Question about Air Tools & Compressors

1 Answer

Hi i have replased all my o rings in my sfn2 its a very early model 772764 serial number when i load the air firing pin fires and stays down and air leakes fron behind trigger asembly

Posted by Anonymous on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Sergeant:

    An expert that has over 500 points.

  • Expert
  • 206 Answers

The SFN1 has a very small o-ring between the head and the tool body that often gets missed - check to see if it is there

Posted on Jun 11, 2014

2 Suggested Answers

6ya6ya
  • 2 Answers

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

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

  • 1383 Answers

SOURCE: Senco SFN1 wont work

I have worked on many sfn1 with the problem that you describe. Here are a few things to check. Driver/piston too tight or too loose in cylinder or bent. It should be relatively easy to move the driver piston up/down the cylinder. Usually it should hold it's own weight and not drop down the cylinder. There is a washer that should be at the bottom of the gun under the bumper (washer part# bf0070). This washer must not be worn to the point that too much air will leak past or missing. Finally there is an oring that controlls return of piston (part # lb0077). Pull out the cylinder and find it located on the outer part of the cylinder close to bottom. Clean the port holes under the oring and make sure that the oring fits snuggly. Do not use oil in this gun. Oil will swell the rubber parts. I use silicone lube available form Lowes in the plumbing department. The grease is used to lube faucet orings. Good luck with your repair and email if you have questions.

Posted on Mar 16, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

With 90 # air and PC nails. When I pull the trigger nothing happens. No air noise, no nailing, no movement - just dead. It's been oiled every use.


Most likely stuck trigger valve. Easy to check. Remove nails, remove trigger to expose the firing pin of trigger valve. Connect air and very quickly depress the firing pin all the way in. If the gun fires , adjust the safety to depress the trigger valve completely. If the gun does not fire, replace firing valve, or remove and check /lube o-rings in valve. Good luck

Jul 11, 2015 | Air Tools & Compressors

1 Answer

I put a new o ring rebuild kit in my Bostitch N80 sb framing nailer. I replaced every o-ring (including the trigger valve assembly


If the new trigger valve leaks air when you connect the air supply, most likely defective valve or air is leaking past outer trigger valve orings due to debris in the slot or new orings were cut when the valve was pushed in. If air leaks when you depress safety to fire gun then most likely problem is in the head valve or safety foot is not pushing the firing pin all the way in. Easy test, remove nails and remove the trigger to expose the firing pin. Connect air and very quickly depress the firing pin all the way in. If the gun fires, adjust the safety foot as needed. If the gun does not fire, remove the head and check headvalve orings for good snug fit against the cylinder within the head. The surface were orings make contact must be very smooth and not too deeply worn. If you notice fine scratches remove with fine sandpaper. Reinstall head using plenty of white grease on all the orings within the head and retest. Good luck

Feb 10, 2013 | Stanley Bostitch N80CB Coil Framing Nailer

1 Answer

I have a Bostitch N64C Siding Nailer. I have put a new trigger kit and o ring rebuild kit in it and still can't get it to fire. The plunger seems to just be floating about in the cylinder


Assuming no air leaks when you connect air to gun. Remove nails and remove roll pin holding trigger allowing access to pin of trigger valve. With very quick motion depress trigger pin all the way in. If the gun fires then most likely problem with safety and trigger not being pushed all the way up against valve pin. If the gun does not fire, most likely problem with headvalve orings not seating due to scratches where orings contact metal. Remove head and examing metal parts and sand with fine paper to remove scratches (400 grit to finish). Install headvalve into head with plenty of silicone paste lube and push headvalve down into head with thumbs. Cover venthole on sealing surface of head with finger and release thumb pressure. The headvalve should stay down in head with vacuum and release when you release finger on vent hole. If no vacuum then orings are not sealing and gun will not work correctly. Good holidays

Nov 21, 2010 | Stanley Bostitch Coil Framing Nailer

1 Answer

I need to know kilowatt of fire - serial number


3412.1416 btus = 1 kilowatt , so it should have the btus near the serial number , but with no name or model number , thats all you can do

Mar 05, 2010 | Heating & Cooling

2 Answers

Good air pressure but pellet does not discharge. Firing pin is has hole in tip.


Check your piston is still connected to the piston ram they can come apart and piston stays at front of chamber whilst the ram moves

Feb 18, 2010 | Beeman 1024 Takedown Rifle, Scope, Rings &...

1 Answer

My model 88 Harrington and Richardson 12 gauge shotgun serial number AX505342 will not fire. How do i take it apart? Would i need a new firing pin?


You first need to **** the gun then remove the fore end and barrel and look at the breech face when pulling trigger , you will see if firing pin is there. If not u need a new pin as it is probably broken. Take it to gunsmith if u are not familiar with the workings and get a new pin .

Sep 27, 2009 | Sport & Outdoor - Others

1 Answer

Senco roofing nailer 200r not feeding nails because hammer stays down after firing which gets in the way of the next nail being fed in.


You have a problem with o rings or the firing valve. I would go to Senco.com and they have a parts breakdown with a list of kits that are available for the tool. They also have a toll free tech support number is you need it.

Sep 20, 2009 | Senco Air Tools & Compressors

4 Answers

Paslode 350 wont fire


Hi,
Probably needs cleaning. You`ll need two new o`rings.

Aug 19, 2009 | RTO PasLode 900420 Impulse Framing Nailer

1 Answer

Paslode framing nailer when fired pin stays out wont retract


Check the anvil guide for damage first (ie: burrs, nicks, etc.) Then go to the chamber for the return spring. That is where your problems are.

May 12, 2009 | Craftsman Nailer Kit, Palm Air Driver

1 Answer

Trigger is frozen gun will not fire


I have worked on many senco finish nailers including the sfn2 and have found them to be very reliable except when the wrong type of oil or too much is introduced into the gun. Some oils can swell the orings and cause the problem that you are having. No worries however, orings are available at www.toolpartsdirect.com as well as parts list. An oring kit costs less per oring. You must remove the head to access trigger parts. Part # LB5005 (firing valve) is the part that fails the most on your gun but failure of this part leaks air out of top. You should keep a spare firing valve just in case. Enjoy

Dec 08, 2008 | Air Tools & Compressors

Not finding what you are looking for?
Air Tools & Compressors Logo

Related Topics:

60 people viewed this question

Ask a Question

Usually answered in minutes!

Top Air Tools & Compressors Experts

John Trevino

Level 3 Expert

1383 Answers

Joe Garcia
Joe Garcia

Level 2 Expert

205 Answers

Brad Brown

Level 3 Expert

15478 Answers

Are you an Air Tool and Compressor Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...