Hitachi NR90GC - 3-1/2" Gas Powered Clipped Head Framing Nailer Technical Data And Service Manual page 63

(b) Reassembly
Perform reassembly according to the following procedure.
Mount Nail Feeder (A) [112] and the Spring [119] to Nail Feeder (B) [120] and drive the Roll Pin D4 x 28 [118]
in "B" direction as shown in Fig. 52 to secure it. Do not protrude the end of the Roll Pin D4 x 28 [118] from
Nail Feeder (B) [120].
See Fig. 53.
(1) Fit the Spring D8 [122] in Handle (A) [124].
(2) Set the Pushing Lever Stopper [123] on the Spring D8 [122]. Do not tilt the Spring D8 [122] or insert the
Pushing Lever Stopper [123] into the Spring D8 [122]. Check that the Pushing Lever Stopper [123] moves
smoothly. Keep holding the Pushing Lever Stopper [123] with fingers until the Side Plate [55] is mounted
because the Pushing Lever Stopper [123] is apt to be removed. Set the Ribbon Spring [121] to Handle (A)
[124]. Mount the Side Plate [55] to Handle (A) [124] with the spring hooking portion of the Side Plate [55]
engaged with the hook of the Ribbon Spring [121].
(3) Insert a finger into the coil portion of the Ribbon Spring [121] from the front of Handle (A) [124]. Stretch
the coil portion in the nail feeder pulling direction. Then set the nail feeder to the coil portion and return the
nail feeder to the forward position slowly. Mount the Feeder Knob [125] to the nail feeder and tighten the
Tapping Screw (W/Flange) D5 x 20 (Black) [126].
Apply grease to the Lever Stopper [116] and mount it to the specified position on the handle. Push in the
Lever Stopper [116] as far as it will go with a roll pin puller to engage with the convex portion of Handle (A)
[124] (Fig. 54-1).
Apply grease to the
surface where Handle
(A) [124] contacts
(prevention of dropping).
Lever Stopper [116]
Convex portion
Fig. 54-1
Handle (A) [124]
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Push in this portion to engage
with the convex portion of
Handle (A) [124].