1.O-ring in trigger valve are damage

2. Air nailer's trigger valve head are damage

3.Air nailer's trigger valve stem, seal or O-ring are damaged

1.Check and replace O-ring

2.Check and replace

3.Check and replace trigger valve stem, seal or O-ring

1.Loose screws

2.Worn or damaged O-ring or bumper

1.Tighten screws

2.Check and replace O-ring bumper

1.Loose screws

2.Worn or damaged O-ring or bumper

1.Replace bumper

2.Adjust the air pressure

1.Worn bumper

2.Air nailer pressure is too high

1.Verify adequate air supply

2.Place 2 or 6 drops of oil into inlet

3.Check and replace O-ring or seal

4.Replace damaged air nailer internl parts

1.Inadequate air supply

2.Inadequate lubrication

3.Worn or damaged air nailer's O-ring or seals

4.Exhaust port in cylinder head is blocked

1.Verify adequate air supply

2.Place 2 or 6 drops of oil into air nailer's inlet

3.Check and replace O-ring or seal

4.Replace damaged internl parts

1.Worn bumper or damaged spring

2.Dirt in front plate of the air nailer

3.Dirt or damage prevent fasteners from moveing freely in  spray gun's magazine

4.Worn or dry air nailer's O-ring on piston or lack of lubrication

5.Cylinder cover air nailer's seal leaking

1.Repalce bumper or pusher spring

2.Clean drive channel on front plate

3.Air nailer's magazine needs to be cleaned

4.O-ring need to be replaced and lubricate

5.Replace sealing washer

1.Incorrect or damaged fasteners

2.Damaged or worm driver guide

3.Air nailer's magazine or nose screw loose

4.Air nailer's magazine is dirty

1.Change and use correct fastener

2.Check and replace the driver

3.Tighten the magazine

4.Clean the magazine