Hitachi NR 83AA2 - Post-Reassembly Inspection and Testing

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(3) Nail Feeders (A) [65], (B) [67] and the related parts (See Fig. 20.)
Tool required
Roll pin puller (4 mm (0.157") dia.)
(a) Disassembly
Fix the Nail Feeder Ass'y [69] using a V-block and pull out the Roll Pin D4 x 40 [66] from the top using a roll
pin puller (4 mm (0.157") dia.). Then Nail Feeder (A) [65], Nail Feeder (B) [67] and Feeder Spring [68] 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 [66] into Nail Feeder (B) [67]. Insert the Feeder Spring [68] into the hole of the
Nail Feeder (B) [67] and compress the Feeder Spring [68] until it is engaged with the protrusion of Nail
Feeder (A) [65].
Nail Feeder Ass'y
[68]
[69]
[66]
[67]
[65]
Roll Pin D4 x 40
Feeder Spring
Nail Feeder (B)
Nail Feeder (A)
Protrusion
Hole
Fig. 20
11. INSPECTION AND CONFIRMATION AFTER REASSEMBLY
Check that Plunger (B) [54] and Trigger Plunger [59] move smoothly.
Check that there is no air leakage from each part.
While driving nails with an air pressure of 4.5 kgf/cm
2
(63 psi), check that there is no idle driving and bending
of nails.
Recheck the tightening torque of each screw.
Check that Pushing Lever [46] slides smoothly.
Check that the machine will not operate only by actuating Trigger [53]. Also check that the machine will not
operate only by depressing Pushing Lever [46].