Hitachi NV 45AB2, Технические данные и руководство по обслуживанию

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(1) Trigger Valve Bushing [56], Valve Bushing [51] and related parts:
Tools required:
Roll pin puller (3 mm (0.118"))
Flat-blade screwdriver
Phillips screwdriver
Hex. bar wrench (4 mm)
(a) Disassembly:
Disassemble the magazine section and nose portion from the main body. (Refer to paragraph 10-2-(1)-(a).)
Extract the Roll Pin D3 x 30 [47], and remove the Trigger [58], Trigger Plunger [57] and Plunger (B) [59].
Insert the flat-blade screwdriver into the groove on the Trigger Valve Bushing [56] and, while being very
careful not to damage the groove, turn it counterclockwise to loosen it.
Next, extract the Trigger Valve Bushing [56] and Valve Bushing [51].
(b) Reassembly:
Reassembly can be accomplished by following the disassembly procedures in reverse. However, special
attention should be given to the following items.
Thoroughly remove any tar or dirt which may be stuck on the tip of the Nose [32] and the inside sliding
portion of the Pushing Lever [38].
Pay particular attention not to twist the Plunger Spring [48], and break or damage the O-Rings.
After mounting the Valve Rubber Cover [60] on Plunger (B) [59], reassemble Plunger (B) [59] into the
Valve Bushing [51]. As illustrated in Fig. 15, ensure that the lips of the Valve Rubber Cover [60] are
properly inserted into the grooves provided between the Valve Bushing [51] and Plunger (B) [59].
On completion of reassembly, ensure that when Plunger (B) [59] is pushed up with a finger and released,
it smoothly returns to its original portion.
10-3. Disassembly and Reassembly of the Valve Section: (See Figs. 15 and 16.)