Komatsu PC16R-3 User Manual

TIGHTENING TORQUES
201
4.5 TIGHTENING TORQUES
4.5.1 STANDARD TIGHTENING TORQUES FOR SCREWS AND NUTS
CAUTION
q If screws, nuts or other parts are not tightened with the required torque, they may become loose or dam-
age the components with which they cooperate, and this may cause machine failures or operation prob-
lems. Always pay the utmost attention when carrying out tightening operations.
If not specified otherwise, tighten the screws and nuts applying
the torques specified in the table.
If it is necessary to replace a screw or a nut, always use Komatsu
original spare parts having the same size of the part to be re-
placed.
a Nm (Newton metre): 1 Nm = 0.102 kgm
IMPORTANT
q This tightening torque table is not valid for screws or nuts that must fasten parts made of nylon or simi-
lar materials onto washers or components made of nylon or nonferrous metals or requiring specific
tightening torques.
RYA02980
Thread diame-
ter (a) (mm)
Pitch
(mm)
Wrench size
(b) (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
33
36
39
3
3.5
3.5
4
4
41
46
50
55
60
96 ± 10
131 ± 14
177 ± 20
230 ± 25
295 ± 33
945 ± 100
1287 ± 140
1740 ± 200
2250 ± 250
2900 ± 330
135 ± 15
184 ± 20
250 ± 27
320 ± 35
410 ± 45
1329 ± 140
1810 ± 190
2455 ± 270
3150 ± 350
4050 ± 450
WEAM012405

Komatsu PC16R-3 Specifications

General

Brand	Komatsu
Model	PC16R-3
Category	Excavators
Language	English