Hitachi NV 45AC Technical Data And Service Manual page 17

Problem
(
Driver blade is worn.
3) Nails cannot
be driven into
the workpiece
completely:
O-ring in the piston is
the heads
abnormal (worn or
cannot be
damaged).
made flush.
Cylinder inside surface is
(continued)
abnormal (worn or rough).
Cylinder plate or O-ring is
abnormal (removed,
deformed or damaged).
Head valve sliding surface is
abnormal (seized or
damaged, or lubrication is
needed).
4) Nails jam. <Nails>
Unspecified nails are used.
Abnormal nails are mixed.
Nail heads are too large or
too small.
Collating wires are abnormal
(broken, welding failed,
deformed or welding position
failed).
Collating wires are
deformed (deformed in
collation angle or collation
pitch).
Possible cause
: most-common cause)
Inspection methods
Perform idle driving to check
the driver blade is projected
from the nose tip.
Disassemble the output
section and check the
O-ring and the inside of the
cylinder for abnormality.
Disassemble the cylinder
plate and check for
abnormality.
Check the sliding surface for
abnormality and lubrication.
Check if the specified nails
are used.
Check the nails as follows.
16˚
--- 15 ---
Remedy
Replace the part.
Replace the abnormal part.
Replace the abnormal part.
Replace the abnormal part.
Apply grease.
Use specified nails.
Remove the abnormal nails
and load the nailer with
proper nails.
UNIT: mm (inch)
Type L L
1 2
7 16
A
(0.276) (0.630)
7 25
B
(0.984)
(0.630)