Hitachi NR 65AK Service Manual page 16

(2) Lockout feature mechanism
This tool is equipped with a lockout feature that
prevents the tool from being activated when there
are 4 or less nails in the Magazine [74].
When the number of nails in the Magazine [74]
becomes five or less, the Pushing Lever Stopper
[80] moves the bent portion of Pushing Lever (C)
[24] downward. The status of Pushing Lever (C)
[24] at this time is shown in Fig. 10. Thus the nailer
does not start even if the Trigger [52] is pulled or the
pushing lever is pushed up.
(3) Nail gate mechanism
(a) When nails are loaded in the Magazine [74], the end of the Shaft [59] is inserted into the groove of the Nail
Gate [72] and the Nail Gate [72] cannot move. Therefore, only the nails whose lengths match the position of
the Nail Gate [72] can be loaded in the Magazine [74] (Fig. 12).
Pushing Lever
Stopper [80]
Shaft [59]
Magazne Cover [71]
Magazine [74]
Nail Feeder [83]
Fig. 12
--- 12 ---
Nail Feeder [83]
Bent portion
Fig. 11
Groove of
Nail Gate
[72]
Nail Gate [72]
Trigger [52]
Pushing Lever (C)
[24]
Magazine [74]