Bostitch Nail Gun Troubleshooting | How to Guide

There may arise some problems while nailing with your Bostitch nail gun. But that does not mean your tool has become worthless. You can still solve problems like leaking air, not firing, and slow nailing if you know how to fix them. In this article, I will try to show you the problems, their symptoms, and finally, the solutions.

Bostitch Nail Gun Troubleshooting

The causes of Bostitch nailer troubleshooting and their solutions are given below.

Bostitch nail gun troubleshooting

Bostitch Roofing Nailer Problems

Though there are a few other Bostitch nailers, we start our discussion with the Bostitch roofing nailer.

Air Leaks from the Trigger Valve Housing

Air leaking problem from the trigger valve housing arises when the o-ring is cut or cracked somehow. To solve this problem, you have to replace the o-ring with a new one.

Trigger Valve Stem Leaking Air

When seals or o-ring are somehow cut or cracked, the trigger valve stem might leak air. If you want to get rid of this problem, change the entire trigger valve assembly immediately.

Frame/Nose Leaking Air

Some possible reasons behind problems of this sort are as follows.

  • When nose screws get loose, air may leak from the loosened screws. To solve this problem, tighten the nose screws and recheck whether air is still leaking or not.
  • When the o-ring or gasket gets cracked somehow, replace the gasket or o-ring immediately. Otherwise, air might still leak from there and cause trouble.
  • If the cap screws become loose, air may leak from there too. Tighten the screws with a screwdriver, and that should block the leakage.
  • Air leakage can also occur when the head valve bumper gets cracked or worn out. Replace this entire bumper to get rid of this problem.

Bostitch Roofing Nailer Failure to Fire

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You cannot express all the causes of the Bostitch roofing nailer not firing in straight words. Yet, I tried to point out a few of them.

  • If the air supply gets restricted in some ways, the Bostitch roofing nailer may not fire appropriately. To solve this problem, inspect the mechanism thoroughly. If you find any defects while doing so, try to repair or tweak the air compressor settings. 
  • When the tool lacks lubrication, the Bostitch air nailer faces some difficulty to fire. Applying air tool oil may reduce the dryness and thus resume the firing. 
  • If the cylinder cap is broken somehow, replace the component instantly. Otherwise, it will cause the firing to stop. 
  • If the head valve is stuck in the cap, take apart the valve and inspect what went wrong. Then, lubricate the valve so that it does not get stuck again.

Bostitch Roofing Nailer Slow to Cycle

If you wonder why your roofing nailer is slow to cycle, look through this portion for possible solutions.

  • If the tool becomes dry, it may become slow to cycle. To abate dryness, power tools need to lubricate. Hence, lubricate using recommended lubricants once in a while. 
  • If the cylinder sleeve does not fit properly on the bottom bumper, the nailer may not work accordingly. To resolve this problem, disassemble the cylinder sleeve and place them in the correct order. 
  • The Bostitch nailer can be slow to cycle if the air extracting from the nailer cannot expel spontaneously. Examine the bumper, the head valve spring, and muffler thoroughly to pop out the air smoothly. 
  • Check out the air compressor thoroughly. If the air pressure is sluggish, it may cause the cycle to slow down.

Disassemble the Nailer

Bostitch Roofing Nailer is Not Feeding

Here are some common causes and their specific fixes, if your Bostitch roofing nailer won’t feed nails. 

  • Inadequate airflow through the quick disconnect socket and plug causes for not feeding nails. Replace the entire quick disconnect setting to get rid of this problem.
  • If the tool is dry and lacks lubrication, it will not feed properly. Hence, moisture it with recommended lubricants. 
  • Dirty magazines also cause feeding problems. Clean the magazine with a lubricating object. 
  • If the head cap gasket leaks and the trigger valve o-ring gets damaged somehow, tighten the screws and replace the o-ring. 
  • If the nails and nail gun are not the same in size, the nailer may not feed appropriately. Be conscious while you are choosing nails for nailing. And ensure that the nail size complies with the nailer.

Bostitch Roofing Nailer Keeps Jamming

There are several reasons behind jammed nails. Some reasons are described below.

  • Wrong fasteners may cause jamming of nailers. To solve this problem, use appropriate-sized nails. 
  • If the driver channel is worn, broken, and chipped somehow, it can jam the nailer. Change the driver to solve the jamming problem.
  • Loose magazines or nose screws also cause jamming. If you want to solve this problem, tighten all the screws.

Tighten the Screws

Bostitch Brad Nailer Problems

The troubleshooting steps for Bostitch brad nailer are almost the same as Bostitch roofing nailer.

Bostitch Brad Nailer Air Leaking Problems

There are some reasons for this leaking problem. These are:

  • Check carefully where the air leaks from. If the air leaks from the trigger valve steam, the seals may have cracked somehow. In this case, replace the entire trigger valve assembly to get rid of the leak. 
  • Again, if the air leaks from the trigger valve housing, replace the o-ring as it may be damaged.

Damaged Air Nailer

What If Your Bostitch Brad Nailer Won’t Work at All?

Some of the culprits are shown below.

  • Clean the tool because dirt may stop the brad nailer from working efficiently. 
  • When the pressure setting is inaccurate, the Bostitch brad nailer may not work right. Adjust pressure settings to make the tool operate properly. 
  • If some parts of the tool are set up wrongly, you may face problems while operating. Inspect the internals and assemble the misplaced parts correctly.

Bostitch Framing Nailer Repairing

The problems are pretty unique for the Bostitch Framing nailer. Here’s how.

Fastener Misses the Metal Connector Holes

Broken 158457 torsion spring and broken 158455 pin causes the metal connector holes to be missing. Replace the broken part to solve this problem. Furthermore, do not forget to lubricate the spring while replacing it.

Bostitch Framing Nailer Won’t Retract

The reasons for not retracting:

  • If the check band is misplaced, the Bostitch framing nailer may not retract. In case this happens, replace the check band asap. 
  • If the cylinder seal is somehow damaged or worn, replacing the damaged part might solve the retraction issue.
  • Cracked lower bumper and worn piston o-ring also cause retracting problems. An obvious remedy is to replace the bumper and tighten the o-ring.

Bostitch Finish Nailer Problems

For the most part, various Bostitch finish, brad, framing, and roofing nailers are repaired in the same manner. Therefore, follow the hacks that are listed above.

Frequently Asked Questions

How do you unjam a Bostitch?

Put Some drops of oil directly on the pin and side channel. Clear all the nails and reassemble the nose and check out whether the tool works or not. If the instrument is not still responding, the pin may be damaged or bent somehow.

Why does my nail gun shoot air only?

If you are using a pneumatic nailer or stapler, you may hear air leaking sound only. That means your o-ring is not sealed accurately. To get rid of this problem, stretch the o-ring on the firing valve and apply it to lubricate.


To keep your Bostitch nailer in the best condition and working smoothly, ensure that you clean and lubricate it regularly. The user manual will provide you with possible instructions to operate your nailer properly. If you still face problems that you cannot solve by yourself, ask for help from a professional.

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