Disassembly And Reassembly Of The Control Valve Section; Disassembly And Reassembly Of The Driving Section And The Magazine Section - Hitachi N 5008AC Technical And Service Manual

10-3. Disassembly and Reassembly of the Control Valve Section

Tools required:
Roll pin puller (3 mm (0.118") dia.)
Flat-blade screwdriver
(a) Disassembly (See Fig. 14.)
Remove the driving section and the magazine section as described in section 10-2-(3).
With the roll pin puller (3 mm (0.118") dia.), take out the Roll Pin D3 x 30 [53], and remove the Trigger [52],
Trigger Plunger [51] and Plunger (B) [45].
Insert the flat-blade screwdriver into the groove of the Trigger Valve Bushing [49], and loosen it by turning it
to the left, being careful not to damage the groove.
After removing the Trigger Valve Bushing [49], pull down strongly on the Valve Bushing [44] to remove the
Valve Bushing [44], Plunger (A) [41] and the Plunger Spring [40].
Plunger Spring [40]
(b) Reassembly
Reassembly can be accomplished by following the
disassembly procedures in reverse. However, special
attention should be given to the following items.
Be very careful in handling the Plunger Spring [40],
as it can become twisted very easily.
To prevent the two O-rings on the outside of the Valve
Bushing [44] from being damaged when inserted into
the body, carefully apply grease to the body hole and
the outer circumference of the O-rings prior to
assembly.
(c) Adjustment of the Pushing Lever [31] (See Fig. 15.)
The Pushing Lever [31] can be adjusted by loosening
the Nut M5 [61] and turning the Safety Bolt [60].
Perform adjustment to a point where the resistance of
Plunger (B) [45] pushing up Plunger (A) [41] is felt
when the pushing lever is raised. At this point, the
lower end of the Nose [25] should be separated from
the lower end of the pushing lever by
4.5 mm 0.5 mm (.177"
Plunger (A) [41]
Valve Bushing [44]
Trigger [52]
Plunger (B) [45]
.020").
Valve Plate [48]
Trigger Valve Bushing [49]
Trigger Plunger [51]
Roll Pin D3 x 30 [53]
Fig. 17
Fig. 14 Disassembly of valve
Plunger (A) [41]
Plunger (B) [45]
Fig. 15 Pushing lever adjustment
--- 22 ---
Safety Bolt [60]
Nut M5 [61]
Pushing Lever [31]
Pushing Lever Piece [62]