Hitachi N 5008AC Technical And Service Manual page 23

(2) Head Cap [7], Exhaust Valve [6] and related parts (See Fig. 12.)
Tool required:
Hexagonal bar wrench (4 mm)
(a) Disassembly
As described in paragraph 10-2-(1), remove the Exhaust Cover [3].
Remove the two Hex. Socket Hd. Bolts M5 x 20 [1] and, such as illustrated in Fig. 12, disassemble the
Head Cap [7], the Exhaust Valve [6] and Gasket (C) [5] in that order.
(b) Reassembly
Reassembly can be accomplished by following the disassembly procedures in reverse. Ensure that the Hex.
Socket Hd. Bolts M5 x 20 [1] are properly tightened to specified torque (85
Hex. Socket Hd.
Bolt M5 x 20 [1]
Top Cover [2]
Hex. Socket Hd.
Bolt M5 x 20 [1]
Exhaust Cover [3]
Gasket (B) [4]
Gasket (C) [5]
Exhaust Valve [6]
Head Cap [7]
Fig. 12
--- 20 ---
5 kgf cm, 6.1 0.4 ft-lb.).
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