Hitachi NT 65GB Technical Data And Service Manual page 38

(3) Disassembly and reassembly of the cylinder ass'y
(a) Disassembly
• Use the retaining ring puller for C-type holes to remove the Retaining Ring For D40 Hole [18].
Insert a finger into the outlet of Cylinder Ass'y (A) [104A] and push the tip of the Piston
[27]straight up. Then remove the Piston [27] from Cylinder Ass'y (A) [104A].
• Remove the two Piston Ring (A) [26] from the Piston [27], while being careful not to deform
the rings.
• Remove the Piston Bumper [28] by inserting the roll pin puller or similar tool into the screw
hole of Cylinder Ass'y (A) [104A], or into the opening at the end of the Piston [27], and then
striking it with a hammer (Fig. 32).
• Remove the Seal Lock Hex. Socket Hd. Bolt M4 x 8 [46], and then remove the exhaust port
components, starting with the Buffer Cover [48] and Muffler [49].
Seal Lock Hex. Socket
Hd. Bolt M4 x 8 [46]
Conical Spring H8 [47]
Buffer Cover [48]
Reed Valve [50]
Muffler [49]
O-Ring [52]
Fig. 31
-35-
Buffer Plate [51]
Mesh [53]
Cylinder [42A]