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0421 IH-8726
OPERATING ISSUE
CAUSES
RECOMMENDATIONS
Trigger valve stem leaks air
O-ring cut or cracked
O-ring/seals cut or cracked
Replace O-ring.
Replace trigger valve assembly.
Frame/nose leaks air
Loose nose screws
O-ring or gasket is cut or cracked
Bumper cracked/worn
Tighten and recheck.
Replace O-ring or gasket.
Replace bumper.
Frame/cap leaks air
Damaged gasket or seal
Cracked/worn head valve bumper
Loose cap screws
Replace gasket or seal.
Replace bumper.
Tighten and recheck.
Failure to cycle
Air supply restriction
Tool dry, lack of lubrication
Worn head valve O-rings
Broken cylinder cap spring
Check air supply equipment.
Use BOSTITCH Air Tool Lubricant.
Replace O-rings.
Replace cylinder cap spring.
Lack of power; slow to cycle
Tool dry, lacks lubrication
Broken cylinder cap spring
O-rings/seals cut or cracked
Exhaust blocked
Trigger assembly worn/leaks
Dirt/tar buildup on driver
Cylinder sleeve not seated correctly
on bottom bumper
Head valve dry
Air pressure too low
Use BOSTITCH Air Tool Lubricant.
Replace cap spring.
Replace O-rings/seals.
Check bumper, head valve spring,
muffler.
Replace trigger assembly.
Disassemble nose/driver to clean.
Disassemble to correct.
Disassemble/lubricate.
Check air supply equipment.
TROUBLESHOOTING
