Hitachi N 5008AC Technical And Service Manual page 24

(3) Piston Bumper [22] and the related parts (See Fig. 13.)
Tools required
Hexagon bar wrench (4 mm)
Roll pin puller (3 mm (0.118") dia.)
8 mm (0.315") spanner
(a) Disassembly
Pull out the Roll Pin D3 x 30 [37] and remove the Nylock Bolt (W/Flange) M5 x 8 [54] to remove the Guard
[55].
Remove the Hex. Socket Hd. Bolt M5 x 16 [35] and pull out the entire magazine section from Body [20].
Remove the four Nylock Hex. Socket Hd. Bolt M5 x 16 [26]. Then Piston Bumper [22] can be removed
together with the Nose [25].
(b) Reassembly
Disassembly procedures should be followed in the reverse order. Note the following points.
Plunger (B) [45] is apt to come off during disassembly. Be sure to check that Plunger (B) [45] is securely
mounted during reassembly.
Mount the Roll Pin D3 x 30 [37] without fail.
Body [20]
Piston Bumper [22]
Bumper Sheet [23]
Nose [25]
Nylock Hex. Socket
Hd. Bolt M5 x 16 [26]
Blade Guide [27]
Roll Pin D3 x 30 [37]
Nylock Bolt (W/Flange) M5 x 8 [54]
Guard [55]
Handle Arm [56]
Pin [59]
Shaft Ring [64]
Fig. 13
--- 21 ---
Nylon Nut [32]
(W/Washers) M5 x 14 [69]
Magazine Ass'y [68]
Machine Screw