Hitachi H 45MRY Technical Data And Service Manual page 29

Lubrication
Apply special grease (grease for hammer and hammer drill) to the inner circumference of the Connecting Rod
[36], O-rings (I.D 27.2) [29] in the Striker [28] and in the Piston [35], outer circumference of the Retainer
Sleeve [16], sliding portion of the Second Hammer [21], Oil Seal [46], Damper (A) [17], Damper (B) [25],
Damper (C) [22], inner circumference of the Slide Sleeve [31], Hammer Holder (B) [24], Hammer Holder (C)
[27], and the end surface of Spring (A) [5]. Seal 27 g of the special grease into the Cylinder Crank Case [47]
(the Connecting Rod [36] side).
Apply Hitachi Motor Grease No. 29 to the Needle Bearing (M661) [61], pinion portion of the Armature Ass'y
[67], Needle Roller D8 x 20 [15] and Steel Ball D6.35 [10]. Seal 20 g of the Hitachi Motor Grease No. 29 into
the Cylinder Crank Case [47] (the First Gear [60] side).
Oil seals
Be very careful not to damage the O-ring (1AS-50) [13] on the Front Cover [12], O-ring (S-34) [14] in the Front
Cover [12], O-ring (S-25) [19] in Hammer Holder (A) [18], O-ring [41] in the Crank Cover [40], O-rings (I.D
27.2) [29] in the Striker [28] and in the Piston [35], O-ring (S-40) [44] and Oil Seal [46] in the Cylinder Crank
Case [47], and O-ring (S-32) [63] in the Gear Cover Ass'y [62].
9-1-3. Screw locking agent TB1401
Apply screw locking agent TB1401 to all hex. socket hd. bolts M4, M5 and M6.
CAUTION: If bolts are loosened by vibration, they could cause damage to the hammer body. Ensure
without fail that screw locking agent is applied to the threaded portions of the bolts prior to
reassembly.
9-1-4. Tightening torque
(1) Attached bolts of the front cover
(Hex. socket hd. bolts M6 x 25)
(2) Tapping screw D4
(3) Tapping screw D5
(4) Hex. socket hd. bolts M6 x 45
(5) Attached bolts of the crank cover
(Hex. socket hd. bolts M5 x 16)
(6) Attached bolts of the handle
(Hex. socket hd. bolts M5 x 12)
(7) Attached bolts of the back cover
(Hex. socket hd. bolts M5 x 30
(8) Attached bolts of the leaf spring
(Hex. socket hd. bolts M5 x 22)
(9) Attached bolts of the hood
(Hex. socket hd. bolts M5 x 12)
(10) Attached bolts of the leaf spring
(Hex. socket hd. bolts M4 x 10)
1.96 N . m (140
13.7
0.49 N . m (20
1.96
0.49 N . m (30
2.94
0.98 N . m (100
9.8
+1.96 +20
N . m (80 kgf . cm, 69.4
7.84
0 0
N . m (50 kgf . cm, 43.4
+1.96
+20
4.9
0
0
0.49 N . m (40
3.92
N . m (80 kgf . cm, 69.4
+1.96
+20
7.84
0 0
0.49 N . m (40
3.92
0.49 N . m (45
4.41
--- 26 ---
20 kgf . cm, 121.5
17.4 in-lbs.)
5 kgf . cm, 17.4
4.3 in-lbs.)
5 kgf . cm, 26.0
4.3 in-lbs.)
10 kgf . cm, 86.8
8.7 in-lbs.)
+17.4
in-lbs.)
0
+17.4
in-lbs.)
0
5 kgf . cm, 34.7
4.3 in-lbs.)
+17.4
in-lbs.)
0
5 kgf . cm, 34.7
4.3 in-lbs.)
5 kgf . cm, 39.1
4.3 in-lbs.)