Komatsu Galeo PC800LC-8, Operation & Maintenance Manual

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MAINTENANCE
TIGHTENING TORQUE SPECIFICATIONS
4-15
TIGHTENING TORQUE SPECIFICATIONS 4
TIGHTENING TORQUE LIST 4
CAUTION
If nuts, bolts, or other parts are not tightened to the specified torque, it will cause looseness or damage to
the tightened parts, and this will cause failure of the machine or problems with operation.
Always pay careful attention when tightening parts.
Unless otherwise specified, tighten the metric nuts and bolts to the torque shown in the table below.
If it is necessary to replace any nut or bolt, always use a Komatsu genuine part of the same size as the part that
was replaced.
Apply the following table for Hydraulic Hose.
Thread
diameter
of bolt
(a)(mm)
Width
across
flats
(b)(mm)
Tightninig torque [N·m (kgf·m)]
Target value Permissible range
6
8
10
12
14
10
13
17
19
22 13.2 (1.35)
31 (3.2)
66 (6.7)
113 (11.5)
177 (18.0)
11.8 - 14.7 (1.2 - 1.5)
27 - 34 (2.8 - 3.5)
59 - 74 (6.0 - 7.5)
98 - 123 (10.0 - 12.5)
157 - 196 (16.0 - 20.0)
16
18
20
22
24 24
27
30
32
36 279 (28.5)
382 (39.0)
549 (56.0)
745 (76.0)
927 (94.5) 245 - 309 (25.0 - 31.5)
343 - 425 (35.0 - 43.5)
490 - 608 (50.0 - 62.0)
662 - 829 (67.5 - 84.5)
824 - 1030 (84.0 - 105.0)
27
30
33
36
39 41
46
50
55
60 1320 (135.0)
1720 (175.0)
2210 (225.0)
2750 (280.0)
3280 (335.0) 1180 - 1470 (120.0 - 150.0)
1520 - 1910 (155.0 - 195.0)
1960 - 2450 (200.0 - 250.0)
2450 - 3040 (250.0 - 310.0)
2890 - 3630 (295.0 - 370.0)
42 65 3830 (390.0) 3430 - 4220 (350.0 - 430.0)
Nominal - No.
of threads (a)
Width
across flats
(b) (mm)
Tightening torque
Target value Permissible range
N
·
m kgf
·
m N
·
m kgf
·
m
9/16 -18UNF 19 44 4.5 35 - 63 3.5 - 6.5
11/16 -16UN 22 74 7.5 54 - 93 5.5 - 9.5
13/16 -16UN 27 103 10.5 84 - 132 8.5 - 13.5
1 -14UNS 32 157 16.0 128 - 186 13.0 - 19.0
13/16 -12UN 36 216 22.0 177 - 245 18.0 - 25.0