Hitachi NR 83AA3 Technical Data And Service Manual page 37

(3) Nail Feeders (A) [71], (B) [73] and the related parts (See Fig. 21.)
Tool required
Roll pin puller (4 mm (0.157") dia.)
(a) Disassembly
Fix the Nail Feeder Ass'y [75] using a V-block and pull out the Roll Pin D4 x 40 [72] from the top using a roll
pin puller (4 mm (0.157") dia.). Then Nail Feeder (A) [71], Nail Feeder (B) [73] and Feeder Spring [74] can
be removed.
(b) Reassembly
Disassembly procedures should be followed in the reverse order. Note the following points.
Insert the Roll Pin D4 x 40 [72] into Nail Feeder (B) [73]. Insert the Feeder Spring [74] into the hole of the
Nail Feeder (B) [73] and compress the Feeder Spring [74] until it is engaged with the protrusion of Nail
Feeder (A) [71].
Nail Feeder (A)
Protrusion
[71]
Hole
[73]
Nail Feeder (B)
Feeder Spring
Fig. 21
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Roll Pin D4 x 40
[72]
[75]
[74]
Nail Feeder Ass'y