Disassembly And Reassembly Of The Cylinder Head Section - Hitachi NT 65GB Technical Data And Service Manual

10-3. Disassembly and Reassembly of the Cylinder Head Section

(1) Disassembly and reassembly of the Cylinder Head [7A] and related parts
[Tools required]
• Hex. bar wrench (3 mm (0.118")
• Spanner (5.5 mm (0.217")) x 2
• Socket wrench (8 mm (0.314"))
• Spanner (7 mm (0.276"))
(a) Disassembly (See Fig. 24.)
Remove Piston Ring (B) [17].
• Remove the Nut M3 [8], Spring Washer M3 [9] and Washer M3 [10] to remove the Fan [11].
• Use a hex. bar wrench to remove the Hex. Socket Set Screw M4 x 5 [21], and then remove
the Motor Ass'y [25B] and mount sleeve.
• Use a socket wrench to remove Spark Plug (A) [5].
• Remove the Shaft Cover [23B] with a spanner (7mm) and remove the Shaft Rubber Washer
[22].
CAUTION: Do not deform the Fan [11].
O-Ring (S-12) [105]
Nylock Hex. Socket
Hd. Bolt M4 x 12 [6]
Shaft Rubber Washer [22]
Mount sleeve
Spark Plug (A) [5]
Cylinder Head [7A]
Hex. Socket Set
Screw M4 x 5 [21]
Packing [19]
Adapter [20]
Fig. 24
-29-
Motor Ass'y [25B]
Shaft Cover [23B]
Piston Ring (B) [17]
Nut M3 [8]
Spring Washer M3 [9]
Washer M3 [10]
Fan [11]
Washer M3 [10]
Spring Washer M3 [9]
Nut M3 [8]