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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 CHECK METHOD CORRECTION
Nailer operates, Check for a jam. Clear a jam.
but no nail is driven.
Check function of nail feeder Clean and lubricate.
per page 19.
Ribbon spring weakened or Replace ribbon spring.
damaged?
Check for proper nails. Use only recommended nails.
Weak drive. Check air pressure. Increase air pressure. (Do not
Slow to cycle. exceed 120 psi (8.3 bars,
8.5 kgf/cm
2
))
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Use Hitachi pneumatic tool
lubricant.
Driver blade worn? Contact Hitachi for
Piston O – ring worn or
replacement.
damaged?
Drives too deep. Check air pressure. Reduce air pressure.
(Adjust 70 – 120 psi)
Skipping nails. Check for proper nails. Use only recommended nails.
Intermittent feed.
Check function of nail feeder Clean and lubricate.
per page 19.
Ribbon spring weakened or Replace ribbon spring.
damaged?
––––––––––
Use Hitachi pneumatic tool
lubricant.
Piston O – ring cut or heavily Contact Hitachi for
worn? replacement.
Nail feeder (A) worn or Replace nail feeder (A).
damaged?
Nails jam. Check for proper nails. Use only recommended nails.
Driven nail is bent.
Driver blade worn? Contact Hitachi for
replacement.
Nail feeder (A) worn or Replace nail feeder (A).
damaged?
Drives properly during Check inside diameter of air Use larger air hose.
normal operation, hose.
but does not drive fully
at faster nailing speeds.
01Eng_NR90AD(S)_US 11/19/10, 2:16 PM21