Komatsu 37BF50111, Operation & Maintenance Manual

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DRIVING TORQUES FOR SCREWS AND NUTS
162
4.4 DRIVING TORQUES FOR SCREWS AND NUTS
4.4.1 STANDARD DRIVING TORQUES
IMPORTANT
q
This driving torque table is not valid for screws or nuts that must lock parts made of nylon or similar ma-
terials on to washers or components made of nylon or nonferrous materials.
4.4.2 SPECIFIC DRIVING TORQUES
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 Rear fastening screws 10 ± 0.75 98 ± 7.3
Engine
Front support central screw
Rear support central screw 6.75 ± 0.75
6.75 ± 0.75 66 ± 7.3
66 ± 7.3
Wheels
Front
Rear 19 ± 1
19 ± 1 186 ± 9.8
186± 9.8