Hitachi NV 75AG Technical Data And Service Manual page 33

(2) Disassembly and reassembly of nail holder, holder shaft, etc.
(a) Disassembly
Pull out the two Pins [76] with a roll pin puller (4 mm dia.). Then Magazine (A) [75] and Magazine Cover
(A) [78] can be removed. Remove Holder Cap (A) [79] and Roll Pin D2.5 x 12 [82] with a roll pin puller
(2.5 mm dia.) Then O-ring (P-9) [62], Nail Holder [81], Holder Shaft (A) [83] and Spring [84] can be
removed.
(b) Reassembly
Disassembly procedures should be followed in the reverse order. Note the following points.
Mount O-ring (P-9) [62] to the top groove of Holder Shaft (A) [83].
When mounting Holder Shaft (A) [83] to Magazine (A) [75], check that the Spring [84] is inserted
between the concave portion of Magazine (A) [75] and the convex portion of Holder Shaft (A) [83] and
then insert the Pin [76]. (See Fig. 20.)
Check that the Feeder Shaft Rings [77] (2 pcs.) are securely inserted into the grooves of the Pins [76]
(2 pcs.) . Be careful not to lose the Feeder Shaft Ring [77].
Check the following after reassembly:
The Nail Holder [81] tilts when opening Magazine Cover (A) [78].
The Nail Holder [81] housed in Magazine (A) [75] smoothly when closing Magazine Cover (A) [78].
Convex portion of
Holder Shaft (A) [83]
Spring [84]
Fig. 20
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Nail Holder [81]
Pin [76]
Concave portion of
Magazine (A) [75]