Komatsu PC14R-3 User Manual

TIGHTENING TORQUES
WEAM009300
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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

Komatsu PC14R-3 Specifications

General

Brand	Komatsu
Model	PC14R-3
Category	Excavators
Language	English