Hitachi NV 45AB2 - Page 20

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Check that the distance
between the lower end of
the nose and the lower end
of the pushing lever is
5 0.5 mm (0.197 0.020")
under the following
conditions.
Pull up plunger (B) until it
contacts plunger (A).
Pull up the pushing lever
until plunger (B) contacts
the safety bolt.
Safety belt is not adjusted
properly.
Correct or replace the parts.
Remove dust and then
lubricate.
Replace the abnormal parts.
Check that a nail does not
catch on another nail in the
magazine.
Check that a nail does not
catch on some part of the
magazine.
Check the height of the nail
holder.
< Magazine section >
< Pushing lever >
Magazine
Air leaks from Gasket (A) or
Gasket (E).
O-rings are worn or
deformed.
O-rings need lubrication.
Problem
Possible cause
( : most-common cause)
Inspection method Remedy
1) Nails cannot
be driven.
Tighten screws and replace
gaskets.
Replace the O-rings.
Apply grease or lubricate.
Check that the nail guide is
not abnormal (worn,
deformed, damaged, etc.)
Check the operation of main
nail stopper and nail stopper.
<Nail guide section>
Nail guide face is abnormal
(deformed, burrs or
damaged).
Dust sticks to the inside of
the nail guide groove, or
lubrication is needed.
Spring is abnormal (missing,
damaged or fatigued).
The claw ridge section of the
nail stopper is abnormal
(damaged, worn or burrs).
Readjust the safety bolt
according to 10-3-(2).
Incorrect attachment of
magazine.
Collate the nails correctly
and reload the nailer with
them.
Remove burrs or deformed
part. Replace the parts.
Adjust the height of the nail
holder correctly.
Check for looseness of
magazine ass'y.
Secure screws.