Hitachi NT50AF Instruction And Safety Manual page 30

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 OR
QUESTION
Trigger valve housing
leaks air
Trigger valve stem
leaks air
Frame/nose leaks air
Frame/cap leaks air
Failure to cycle
Lack of power; slow to
cycle
CAUSE
O‑ring cut or cracked. Contact Hitachi for
replacement.
O‑ring/seals cut or Contact Hitachi for
cracked replacement.
Loose nose screws Tighten and recheck.
O‑ring is cut or cracked Contact Hitachi for
replacement.
Piston cushion is Contact Hitachi for
cracked/ worn replacement.
Damaged seal Contact Hitachi for
replacement.
Loose cap screws Tighten and recheck.
Air supply restriction Check air supply
equipment
Tool dry, lack of lubri‑ Use Air Tool Lubricant
cation
Worn head valve O‑ Contact Hitachi for
rings replacement.
Tool dry, lack of lubri‑ Use Air Tool Lubricant
cation
Broken cylinder cap Contact Hitachi for
spring replacement.
O‑rings/seals cut or Contact Hitachi for
cracked replacement.
Exhaust blocked Contact Hitachi for
replacement.
Dirt/tar build up on Contact Hitachi for
driver replacement.
Head valve dry Contact Hitachi for
replacement.
Air pressure too low Check air supply
equipment
— 30 —
CORRECTIVE ACTION
‑ Continued ‑