Hitachi NV 75AN Instruction And Safety Manual page 22

English
Operator troubleshooting
Most minor problems can be resolved quickly and easily using the table below.
If problems persist, contact a Hitachi authorized service center for assistance.
PROBLEM
Nailer operates, but no nail is driven.
Weak drive.
Slow to cycle.
Drives too deep.
Skipping nails. Intermittent feed.
Nails jam.
Driven nail is bent.
Drives properly during normal
operation, but does not drive fully at
faster nailing speeds.
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CHECK METHOD
Check for a jam.
Check function of nail feeder per
page 19.
Check for proper nails.
Check air pressure.
———
Driver blade worn?
Piston O-ring worn or damaged?
Check air pressure.
Check for proper nails.
Check function of nail feeder per
page 19.
Check position of nail holder in
magazine per page 14.
———
Piston O-ring cut or heavily worn?
Check for proper nails.
Driver blade worn?
Check inside diameter of air hose.
CORRECTION
Clear a jam.
Clean and lubricate.
Use only recommended nails.
Increase air pressure. (Do not exceed
120 psi (8.3 bar 8.5 kgf/cm
Use Hitachi pneumatic tool lubricant.
Contact Hitachi for replacement.
Reduce air pressure.
(Adjust 70 – 120 psi)
Use only recommended nails.
Clean and lubricate.
Adjust nail holder to proper position.
Use Hitachi pneumatic tool lubricant.
Contact Hitachi for replacement.
Use only recommended nails.
Contact Hitachi for replacement.
Use larger air hose.
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