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Problem is with sn70 nail gun. has been idle for some months and on application appears to have problem in the valve assy behind the trigger. first pull there is movement of I think the valve spool ,next time a blast of air from the back plate rear of the valve mentioned. there are some radial holes at the rear of the valve assy and air is exhausting from this locaton. Have you an assy drg of this valve.

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  • biduelli Oct 13, 2009

    Having contacted the Senco website, senco was very helpful by sending complete service details, drawings ,parts lists etc.
    I will be able to fix the problem as I now have detailed information on the operation of the nailgun.

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Hello - I'm going to guess that it is "skipping nails" , right ? First you need to purchase the rebuild kit, then pull it apart and replace the O-rings and gaskets and stuff. If you're not very handy you may want to take it to your local "Senco Authorized repair center" I know the kits are on E-Bay pretty cheap, To bring it in you might be looking at as much as 50-75 bucks ?? Heres the Senco site, click on "find a dealer" http://www.senco.com/ And you can download the manual here http://www.senco.com/con_rem/pub_chart.aspx

Posted on Oct 08, 2009

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