Driving Torques For Screws And Nuts; Standard Driving Torques; Specific Driving Torques - Komatsu PC27R-8 Operation & Maintenance Manual

4.4 DRIVING TORQUES FOR SCREWS AND NUTS

4.4.1 STANDARD DRIVING TORQUES

Nm (Newton metre): 1 Nm = 0.102 kgm
Thread Pitch
diameter (mm) (mm)
6
8 1.25
10 1.5
12 1.75
14
16
18 2.5
20 2.5
22 2.5
24
27
30 3.5
IMPORTANT
This driving torque table is not valid for screws or nuts that must lock parts made of nylon or similar
materials onto washers or components made of nylon or nonferrous materials.

4.4.2 SPECIFIC DRIVING TORQUES

ITEM
Engine
Front engine supports
Rear engine supports
Spanner size
(mm)
1 10
13
17
19
2 22
2 24
27
30
32
3 36
3 41
46
DESCRIPTION
Front support central nuts
Rear support central nuts
Engine fastening screws
Engine fastening screws
DRIVING TORQUES FOR SCREWS AND NUTS
8.8
kgm Nm
0.96 ± 0.1 9.5 ± 1
2.3 ± 0.2 23 ± 2
4.6 ± 0.5 45 ± 4.9
7.8 ± 0.8 77 ± 8
12.5 ± 1 122 ± 13
19.5 ± 2 191 ± 21
27 ± 3 262 ± 28
38 ± 4 372 ± 40
52 ± 6 511 ± 57
66 ± 7 644 ± 70
96 ± 10 945 ± 100
131 ± 14 1287 ± 140
10.9
kgm
1.3 ± 0.15 13.5 ± 1.5
3.2 ± 0.3 32.2 ± 3.5
6.5 ± 0.6 63 ± 6.5
11 ± 1 108 ± 11
17.5 ± 2 172 ± 18
27 ± 3 268 ± 29
37 ± 4 366 ± 36
53 ± 6 524 ± 57
73 ± 8 719 ± 80
92 ± 10 905 ± 98
135 ± 15 1329 ± 140
184 ± 20 1810 ± 190
kgm Nm
6.75 ± 0.75 66 ± 7.3
6.75 ± 0.75 66 ± 7.3
11 ± 1 108 ± 11
6.75 ± 0.75 66 ± 7.3
Nm
127