Torque List - Komatsu AX20 Operation & Maintenance Manual

28.4

TORQUE LIST

For unspecified bolts and nuts, use the torque specifications in this list.
Select the proper torque corresponding to the width across flats (b) of bolts
and nuts.
When replacing bolts and nuts, always use genuine Komatsu Forklift parts
that match the previous installation in size.
Thread diameter
of bolt (mm)
(a)
6
8
10
12
14
16
18
20
22
24
27
30
33
36
39
Width across
flat (mm)
(b)
10
13
17
19
22
24
27
30
32
36
41
48
50
55
60
Tightening torque
ft/lb
9.73 ± 1.03 1.35 ± 0.15
23.2 ± 2.1
48.5 ± 5.0
82.6 ± 7.2 11.5 ± 1.0
131 ± 14 18.0 ± 2.0
206 ± 21
282 ± 29
405 ± 43
549 ± 58
684 ± 72
973 ± 100
1,270 ± 140
1,630 ± 180
2,030 ± 210
2,420 ± 250
28. SERVICE DATA
kgfm
13.2 ± 1.4
3.2 ± 0.3 31.4 ± 2.9
6.7 ± 0.7 65.7 ± 6.8
112 ± 9.8
177 ± 19
28.5 ± 3 279 ± 29
39 ± 3 383 ± 39
56 ± 6 549 ± 58
76 ± 8 745 ± 78
94.5 ± 10 927 ± 98
135 ± 15 1,320 ± 140
175 ± 20 1,720 ± 190
225 ± 25 2,210 ± 240
280 ± 30 2,750 ± 290
335 ± 35 3,280 ± 340
Nm
4-9