Bostitch N512C, N400C, N401C, 171119REVB Troubleshooting, Problem Cause Correction, Coil Nailers

TROUBLESHOOTING

PROBLEM	CAUSE	CORRECTION
Trigger valve housing leaks air	O-ring cut or cracked	.Replace O-ring
Trigger valve stem leaks air	O-ring/seals cut or cracked	.Replace trigger valve assembly
Frame/nose leaks air	Loose nose screws	.Tighten and recheck
	O-ring or Gasket is cut or cracked	.Replace O-ring or gasket
	Bumper cracked/worn	.Replace bumper
Frame/cap leaks air	Damaged gasket or seal	.Replace gasket or seal
	Cracked/worn head valve bumper	.Replace bumper
	Loose cap screws	.Tighten and recheck
Failure to cycle	Air supply restriction	.Check air supply equipment
	Tool dry, lack of lubrication	.Use BOSTITCH Air Tool Lubricant
	Worn head valve O-rings	.Replace O-rings
	Broken cylinder cap spring	.Replace cylinder cap spring
	Head valve stuck in cap	.Disassemble/Check/Lubricate
Lack of power; slow to cycle	Tool dry, lacks lubrication	.Use BOSTITCH Air Tool Lubricant
	Broken cylinder cap spring	.Replace cap spring
	O-rings/seals cut or cracked	.Replace O-rings/seals
	Exhaust blocked	.Check bumper, head valve spring, muffler
	Trigger assembly worn/leaks	.Replace trigger assembly
	Dirt/tar build up on driver	.Disassemble nose/driver to clean
	Cylinder sleeve not seated correctly
	on bottom bumper	.Disassemble to correct
	Head valve dry	.Disassemble/lubricate
	Air pressure too low	.Check air supply equipment
Skipping fasteners; intermittent feed	Worn bumper	.Replace bumper
	Tar/dirt in driver channel	.Disassemble and clean nose and driver
	Air restriction/inadequate air flow through
	quick disconnect socket and plug	.Replace quick disconnect fittings
	Worn piston O-ring	.Replace O-ring, check driver
	Tool dry, lacks lubrication	.Use BOSTITCH Air Tool Lubricant
	Damaged feed piston spring	.Replace spring
	Low air pressure	.Check air supply system to tool
	Loose canister nose screws	.Tighten all screws
	Fasteners too short for tool	.Use only recommended fasteners
	Bent fasteners	.Discontinue using these fasteners
	Wrong size fasteners	.Use only recommended fasteners
	Leaking head cap gasket	.Tighten screws/replace gasket
	Trigger valve O-ring cut/worn	.Replace O-ring
	Broken/chipped driver	.Replace driver (check piston O-ring)
	Dry/dirty magazine	.Clean/lubricate use BOSTITCH Air Tool Lubricant
Fasteners jam in tool	Driver channel worn	.Replace nose/check door
	Wrong size fasteners	.Use only recommended fasteners
	Bent fasteners	.Discontinue using these fasteners
	Loose canister/nose screws	.Tighten all screws
	Broken/chipped driver	.Replace driver
COIL NAILERS
Skipping fasteners; intermittent feed	Feed piston dry	.Add BOSTITCH Air Tool Lubricant in hole in feed piston cover
	Feed piston O-rings cracked/worn	.Replace O-rings/check bumper and spring. Lubricate assembly.
	Check Pawl binding	.Inspect Pawl and spring on door. Must work freely.
	Canister bottom not set correctly	.Set canister bottom for length of nails being used
	Broken weld wires in nail coil	.Remove coil of nails and use another coil
Fasteners jam in tool/canister	Wrong size fasteners for tool	.Use only recommended fasteners/check canister bottom adjustment
	Broken welded wires in nail coil	.Remove coil of nails and use another coil
	Wrong slide plate adjustment for
	wire collated nail coil	.Adjust switch pins for wire collated nail coil

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