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• Filling special grease (for the hammer and hammer drill)
Connecting Rod [24] side in the Crank Case [44]: 35 g
• Applying special grease (for the hammer and hammer drill)
Inner circumferences on the Piston [23] side of the Connecting Rod [24], sliding portion of the Second
Hammer [12], sliding portion of the Striker [20], O-ring [21] mounted on the Striker [20] and Piston [23],
O-ring (A) [15] of the Piston [23], and lip portions along the inner circumference of the Oil Seal [35] and
Damper [14]
• Filling Hitachi Motor Grease No. 29
First Gear [45] side and Gear Cover Ass'y [48] side in the Crank Case [44]: 10 g in total
• Applying Hitachi Motor Grease No. 29
Needle Bearing M661 [46] and pinion portion of the Armature [52]
• Applying Doubrex 251
Damper Washer [13], inner circumference of the Second Hammer [12], around the Hammer Holder [2],
inner circumference of the Hammer Holder [2], and Retainer Damper [1]
• Applying Molub-Alloy No. 777-1
Inner circumference of the Needle Bearing [25]
Apply screw locking agent TB1401 to all hex. socket head bolts M5 and M6.
NOTE: Be sure to apply screw locking agent (Three Bond TB1401) to the threads during
reassembly. Otherwise, any bolt loosened due to vibration may damage the tool body.
M6
• Seal Lock Hex. Socket Hd. Bolt M6 x 35 [43] and Seal Lock Hex. Socket Hd. Bolt M6 x 20 [49]
(For mounting the housing and crank case) ------------
• Hex. Socket Hd. Bolt (W/Flange) M6 x 25 [8]
(For mounting the cylinder case) --------------------------
M5
• Hex. Socket Hd. Bolt (W/Flange) M5 x 12 [41]
(For mounting the hood) -------------------------------------
• Hex. Socket Hd. Bolt (W/Flange) M5 x 16 [28]
(For mounting the handle) -----------------------------------
• Hex. Socket Hd. Bolt (W/Flange) M5 x 16 [28]
(For mounting the crank cover) ----------------------------
M4
• Seal Lock Hex. Socket Hd. Bolt M4 x 8 [40]
(For mounting the valve cover) -----------------------------
• Tapping screw (w/flange) D5 -------------------------------
• Tapping screw (w/flange) D4 -------------------------------
Application of lubricant
Tightening torque
-6-
9.8 ± 0.98 N•m (100 ± 10 kgf•cm)
+
+
2.94
30
12.7
N•m (130
0
0
3.92 ± 0.49 N•m (40 ± 5 kgf•cm)
5.88 ± 0.98 N•m (60 ± 10 kgf•cm)
+
+
20
1.96
7.84
N•m (80
0
0
4.41 ± 0.49 N•m (45 ± 5 kgf•cm)
2.94 ± 0.49 N•m (30 ± 5 kgf•cm)
1.96 ± 0.49 N•m (20 ± 5 kgf•cm)
kgf•cm)
kgf•cm)
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