My Mastercraft framing nailer will only fire at angles and not straight. Model 58-8434-4. What could be the issue.

All the parts are shown on on Page 28 of the manual

https://manualzz.com/doc/54715991/mastercraft-058-8434-4-instruction-manual

Parts suppliers, plus sealing rings are available on Amazon

https://www.google.com/search?q=MasterCraft+58-8434-4+parts

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Hi,

Please attempt to push out some test staples at different angles with your mastercraft. That is, I'd like you to rotate 90 degrees 4 times and attempt to push a staple each time. If it works only at certain angles, then we know that something has come apart within the mastercraft. And you've already applied oil on the mastercraft which is good. If possible, please swap out the staples and attempt to sho ot with the new set. Otherwise, I think Home Depot or Lowe's should be the next stop so they can examine the device and determine how to troubleshoot.

Thank you.

Joe,
hey not sure what the d51822 brand name is I work on bostitch as a service tech. so well the obvious question with the details you've given 45 degree angle? so are they bent over to get that angle? not sure how they can come out straight and get bent. ok the nose ( where the nail comes out) is it completely flat on the board? if so I would be nearly impossible to create a 45 angle. not doubting you. I work on F28WW bostitch thinking they are similar so, check the bolts on the top (loose or damaged) or the nose its self see if it is bent. it would be only slight because otherwise the driver ( what pushes the nail in) would get jammed and not fire at all .try that first thinking the nose is bent and if its bent its junk. because cracks are next and that's when really bad things happen fast.

yes you can replace the part but best if tech does it, can be some what complicated..but check manufacture for parts and exploded diagram. most parts are after market now for older guns.

Double fire is usually caused by trying to use a bump fire trigger system as single fire (place on work then pull trigger). If however the gun double fires when bump firing, replace the trigger valve. Some nailers have the ability to select bump or single fire. The selector for bump or single fire is usually on the trigger or just above or below the safety actuator. Other brands offer different triggers available as a part number.
When trying to determine what nail to use, look for the model number of the nailer. Letters associated with the model number will give you a clue. Example; the letters RN in the model number indicates Round head Nail. The angle of the nail is easy to determine. Just measure the angle formed by the path of the driver and any straight line of the rails.

No experience of Mastercraft brad nailers but if fires with out depressing nose tool is dangerous and should be returned to manufacturer. Dewalt make battery powered brad guns and recently produced a battery framing nailer. I would not say that other nail guns are exactly cheap if they are beware they may not be up to the pressures excerted on the whilst firing.

Have you got the safety OFF?

does it attempt to fire, and on the side where the light is what color is flashing when you try to fire, if it is red then usually it means that the battery needs charged. If been sitting the combustion chamber, cylinder could be dry and also dirty and yes I would clean and service it.

I would go to Campbellhausfeld.com and under products look at the couple nailers they list. They do have a 28deg nailer and also a 21deg, so you could be right in thinking that it is a 28deg, they also show how to find the model number if there is still a tag on the tool. This would be a start to identify your gun

not real familiar with the gun in question, but when i have that problem with my Senco guns I usually make sure the nose is clean of gunk and spray some WD40 up the nose