Disassembly And Reassembly; General Precautions In Disassembly And Reassembly - Hitachi NR 83A2 Technical Data And Service Manual

10. DISASSEMBLY AND REASSEMBLY

The items particularly necessary for disassembly and reassembly are described below. The [Bold] numbers in
the descriptions below correspond to the item numbers in the Parts List and exploded assembly diagram.
[CAUTION]
Before disassembly or reassembly, be sure to remove all nails and disconnect the air hose from the
nailer (with your finger released from the trigger) to exhaust all the compressed air.

10-1. General Precautions in Disassembly and Reassembly

Apply grease (ATTOLUB No. 2 Code No. 317918) to the O-rings and the sliding portions. Note that another
grease (MULTEMP PS No. 2 Code No. 939301) must be applied to the O-rings and the sliding portions of the
control valve section. Do not scratch the O-rings nor adhere dust to the O-rings when mounting.
Oil required: Hitachi pneumatic tool lubricant
1 oz (30 cc) oil feeder (Code No. 877153)
4 oz (120 cc) oil feeder (Code No. 874042)
1 quart (1 ltr) can (Code No. 876212)
If Gasket (B) [5] is damaged, replace it and check that no air is leaking.
Be especially careful to prevent the entry of foreign particles into the control valve section.
Use the conventional grip tape for repair of the Grip Rubber [38] because the Grip Rubber [38] cannot be
mounted without the specifically designed jig.
Tightening torque for each part
Nylock Hex. Socket Hd. Bolt M8 x 22 ........................... [33]
Nylock Bolt (W/Flange) M8 x 16 .................................... [35]
Hex. Socket Hd. Bolt (W/Flange) M6 x 45 .................... [1]
Hex. Socket Hd. Bolt M6 x 12 ....................................... [53]
High Tension Bolt M6 x 18 ............................................ [29]
Hex. Socket Hd. Bolt (W/Sp. Washer) M6 x 25 ............. [3]
Hex. Socket Hd. Bolt M6 x 12 ....................................... [53]
Hex. Socket Hd. Bolt M5 x 18 ....................................... [41]
Hex. Socket Hd. Bolt M5 x 45 ....................................... [84]
Hex. Socket Hd. Bolt M4 x 15 ....................................... [85]
Bolt
30.4 2 (310
25.5 1 (260
12.7 0.8 (130
12.7 0.8 (130
9.8 0.8 (100
9.8 0.8 (100
9.8 0.8 (100
8.3 0.5 (85
6.3 0.5 (65
3.4 0.3 (35
--- 28 ---
Tightening torque
N m (kgf cm, ft-lb)
• •
20, 22.4 1.4)
10, 18.8 0.7)
8, 9.4 0.6)
8, 9.4 0.6)
8, 7.2 0.6)
8, 7.2 0.6)
8, 7.2 0.6)
5, 6.1 0.4)
5, 4.7 0.4)
3, 2.5 0.2)