Komatsu Utility 97SF11205, Operation & Maintenance Manual

Page: 189 / 296

187
DRIVING TORQUES FOR SCREWS AND NUTS
4.4 DRIVING TORQUES FOR SCREWS AND NUTS
4.4.1 STANDARD DRIVING TORQUES
4.4.2 SPECIFIC DRIVING TORQUES
IMPORTANT
☞
•
This driving torque table is not valid for screws or nuts that must lock nylon parts or alike onto washers
or components made of nylon or nonferrous materials.
★
Nm (Newton metre): 1 Nm = 0,102 kgm
Thread
diameter (mm)
Pitch
(mm) Spanner size
(mm)
8.8 10.9
kgm Nm kgm Nm
6
8
10
12
14
1
1.25
1.5
1.75
2
10
13
17
19
22
0.96 ± 0.1
2.3 ± 0.2
4.6 ± 0.5
7.8 ± 0.8
12.5 ± 1
9.5 ± 1
23 ± 2
45 ± 4.9
77 ± 8
122 ± 13
1.3 ± 0.15
3.2 ± 0.3
6.5 ± 0.6
11 ± 1
17.5 ± 2
13.5 ± 1.5
32.2 ± 3.5
63 ± 6.5
108 ± 11
172 ± 18
16
18
20
22
24
2
2.5
2.5
2.5
3
24
27
30
32
36
19.5 ± 2
27 ± 3
38 ± 4
52 ± 6
66 ± 7
191 ± 21
262 ± 28
372 ± 40
511 ± 57
644 ± 70
27 ± 3
37 ± 4
53 ± 6
73 ± 8
92 ± 10
268 ± 29
366 ± 36
524 ± 57
719 ± 80
905 ± 98
27
30
3
3.5
41
46
96 ± 10
131 ± 14
945 ± 100
1287 ± 140
135 ± 15
184 ± 20
1329 ± 140
1810 ± 190
ITEM DESCRIPTION kgm Nm
Cab Front support screws
Rear support screws 20 ± 1
20 ± 1 196 ± 9.8
196 ± 9.8
Wheels Front
Rear 81.6 ± 1
81.6 ± 1 800 ± 9.8
800 ± 9.8
Front bucket Teeth 14.5 ± 1 143 ± 9.8
Backhoe bucket Central teeth
Side teeth 14.5 ± 1
14v5 ± 1
143 ± 9.8
143 ± 9.8
Engine and transmission Front support central screw
Rear support central screw 20 ± 1
20 ± 1 196 ± 9.8
196 ± 9.8