Komatsu PW130ES-6K, Operation & Maintenance Manual

Page: 179 / 271

STANDARD TIGHTENING TORQUES FOR BOLTS AND NUTS MAINTENANCE.
178
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.
NOTICE
When tightening panels or other parts having tightening
fixtures made of plastic, be careful not to use excessive
tightening torque: doing so will damage the plastic parts.
Thread diameter
of bolt (mm)
(a)
Width across
flats (mm)
(b)
N•m kgf•m
6
8
10
12
14
10
13
17
19
22 13.2 ± 1.4
31.4 ± 2.9
65.7 ± 6.8
112 ± 9.8
177 ± 19 1.35 ± 0.15
3.2 ± 0.3
6.7 ± 0.7
11.5 ± 1.0
18.0 ± 2.0
16
18
20
22
24 24
27
30
32
36 279 ± 29
383 ± 39
549 ± 58
745 ± 78
927 ± 98 28.5 ± 3
39 ± 3
56 ± 6
76 ± 8
94.5 ± 10
27
30
33
36
39 41
46
50
55
60 1320 ± 140
1720 ± 190
2210 ± 240
2750 ± 290
3280 ± 340 135 ± 15
175 ± 20
225 ± 25
280 ± 30
335 ± 35