Hitachi NR90GC - 3-1/2" Gas Powered Clipped Head Framing Nailer Technical Data And Service Manual page 41

Hex. Socket Hd.
Bolt M5 x 14 [1]
Washer M5 [2]
Top Cover [3]
Filter [4]
Filter Cover [5]
Cylinder Head [14]
(b) Reassembly
Disassembly procedures should be followed in the reverse order. Note the following points.
Push the Adapter [30] in until it contacts the Cylinder Head [14].
Shaft Ring [26]
Washer M5 [2]
Adapter [30]
Washer M5 [2]
Shaft [27]
Latch [106]
Roll Pin D2 x 8 [107]
Cell Lever [105]
Fig. 29
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Spring D3.6 [108]
Cell Rubber [110]
Cell Cover [109]