Hitachi NR 90AE (S), Технические данные и руководство по обслуживанию, Страница: 23 / 42

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Hex. Socket Hd. Bolt
(W/Flange) M6 x 30 [4]
Sheet [3]
Hex. Socket Hd. Bolt
M5 x 14 [1]
Exhaust Cover [5]
O-ring (I.D. 49.4) [8]
Exhaust Valve Rubber [11]
Head Guard [2]
Head Valve Spring [7]
O-ring (I.D. 59.4) [10]
Head Valve [9]
Gasket (A) [6]
Body Ass'y [24]
10-2. Disassembly and Reassembly of the Output Section
(1) Disassembly and reassembly of the Exhaust Cover [5] , Head Valve [9] , Exhaust Valve Rubber [11] , etc.
(See Fig. 11A and Fig. 11B.)
Fig. 11B Fig. 11A Disassembly and reassembly of the
exhaust cover, head valve, exhaust
valve rubber, etc.
Exhaust Cover [5]
Exhaust Valve
Rubber [11]
Bar of 4 to 5 mm dia.
Hammer
[Tools required]
Hex. bar wrench (4 mm, 5 mm)
Hammer
(a) Disassembly
Remove the four Hex. Socket Hd. Bolts M5 x 14 [1] with a
hex. bar wrench. The Head Guard [2] and the Sheet [3]
can now be removed.
Remove the four Hex. Socket Hd. Bolts (W/Flange)
M6 x 30 [4] with a hex. bar wrench. The entire Exhaust
Cover [5] can now be removed from the Body Ass'y [24] .
As shown in Fig. 11B, insert a 4 to 5 mm dia. bar into the
central hole in the Exhaust Cover [5] and force out the
Exhaust Valve Rubber [11] with a hammer. Now, the
parts forming the Exhaust Valve Rubber [11] can be
taken out.
[CAUTION]
To prevent damage to the Exhaust Valve Rubber [11], do
not use a pointed bar or a bar with a diameter of less
than 4 mm.