Disassembly And Reassembly Of The Output Section - Hitachi NT65MA3 - 2-1/2 Angled Finish Nailer Service Manual

10-2. Disassembly and Reassembly of the Output Section

(1) Disassembly and reassembly of the Exhaust Cover [5], Head Valve (A) [10], Cylinder [11], Piston [15], Piston
Bumper [25], etc. (See Fig. 12.)
Hex. Socket Hd. Bolt
M6 x 12 [1]
Plate [2]
Top Cover [3]
Hex. Socket Hd. Bolt
(W/Sp. Washer)
M5 x 25 [4]
Exhaust Cover [5]
Gasket [6]
Head Bumper [7]
Head Valve Spring [8]
O-Ring (I.D 20.8) [9]
Head Valve (A) [10]
Cylinder [11]
Cylinder O-Ring
(I.D 63.1) [12]
O-Ring (P-46) [13]
O-Ring (I.D 34.7) [14]
Piston [15]
Fig. 12 Disassembly and reassembly of the exhaust cover, head valve (A),
cylinder, piston, piston bumper, etc.
[Tools required]
Hex. bar wrenches (5 mm and 4 mm)
(a) Disassembly
Remove the four Hex. Socket Hd. Bolts
(W/Sp. Washer) M5 x 25 [4] with a hex. bar
wrench (4 mm) and remove the Exhaust
Cover [5].
Then the components of the output section
such as the Cylinder [11], Piston [15] and
Piston Bumper [25] (with the Bumper Sheet
[26] assembled) can be removed.
Remove the Hex. Socket Hd. Bolt M6 x 12 [1]
with a hex. bar wrench (5 mm). The Plate [2]
and the Top Cover [3] can now be removed.
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Piston Bumper [25]
Bumper Sheet [26]
Body Ass'y [30]