Torque List - Komatsu PC210LC-6K Operation & Maintenance Manual

21. STANDARD TIGHTENING TORQUES FOR BOLTS AND NUTS

21.2 TORQUE LIST

Unless otherwise specified, tighten the metric bolts and nuts to the
torque shown in the table.
The tightening torque is determined by the width across the flats <b>
of the nut and bolt.
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.
Nm (newton meter): 1 Nm
Thread diameter Width across
of bolt (mm) flat (mm)
(a)
6
8
10
12
14
16
18
20
22
24
27
30
33
36
39
NOTICE
When tightening panels or other parts having tightening fixtures
made of plastic, be careful not to use excessive frightening torque:
doing so will damage the plastic parts.
3-18
.
. . .
=
0.1 kgm
= .
0.74 lbft
(b) Nm
10 13.2 ± 1.4
13 31.4 ± 2.9
17 65.7 ± 6.8
19 112 ± 9.8
22 177 ± 19
24 279 ± 29
27 383 ± 39
30 549 ± 58
32 745 ± 78
36 927 ± 98
41 1320 ± 140
46 1720 ± 190
50 2210 ± 240
55 2750 ± 290
60 3280 ± 340
kgm lbft
1.35 ± 0.15 9.73 ± 1.03
3.2 ± 0.3 23.2 ± 2.1
6.7 ± 0.7 48.5 ± 5.0
11.5 ± 1.0 82.6 ± 7.2
18.0 ± 2.0 131 ± 14
28.5 ± 3 206 ± 21
39 ± 3 282 ± 29
56 ± 6 405 ± 43
76 ± 8 549 ± 58
94.5 ± 10 684 ± 72
135 ± 15 973 ± 100
175 ± 20 1270 ± 140
225 ± 25 1630 ± 180
280 ± 30 2030 ± 210
335 ± 35 2420 ± 250