Komatsu HM400-1 User Manual

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MAINTENANCE
STANDARD TIGHTENING TORQUES FOR BOLTS AND NUTS
STANDARD TIGHTENING TORQUES FOR BOLTS AND NUTS
TORQUE LIST
Unless otherwise specified, tighten the metric nuts and bolts to the torque shown in the table below.
The tightening torque is determined by the width across the flats (b) of the nut and bolt.
If it is necessary to replace any nut or bolt, always use a Komatsu genuine part of the same size as the part that was
replaced.
Thread
diameter
of bolt
(a)(mm)
Width
across
flats
(b)(mm)
Tightening torque
Target value Service limit
N
·
mkgf
·
mlbft N
·
mkgf
·
mlbft
6
8
10
12
14
10
13
17
19
22
13.2
31
66
113
177
1.35
3.2
6.7
11.5
18
9.8
23.1
48.5
83.2
130.2
11.8-14.7
27-34
59-74
98-123
157-196
1.2-1.5
2.8-3.5
6.0-7.5
10.0-12.5
16.0-20.0
8.7-10.8
20.3-25.3
43.4-54.2
72.3-90.4
115.7-144.7
16
18
20
22
24
24
27
30
32
36
279
382
549
745
927
28.5
39
56
76
94.5
206.1
282.1
405.0
549.7
683.5
245-309
343-425
490-608
662-829
824-1030
25.0-31.5
35.0-43.5
50.0-62.0
67.5-84.5
84.0-105.0
180.8-227.8
253.2-314.6
361.7-448.4
488.2-611.2
607.6-759.5
27
30
33
36
39
41
46
50
55
60
1320
1720
2210
2750
3280
135.0
175.0
225.0
280.0
335.0
976.5
1265.8
1627.4
2025.2
2423.1
1180-1470
1520-1910
1960-2450
2450-3040
2890-3630
120.0-150.0
155.0-195.0
200.0-250.0
250.0-310.0
295.0-370.0
868.0-1085.0
1121.1-1410.4
1446.6-1808.3
1808.3-2242.2
2133.7-2676.2
NOTICE
When tightening panels or other parts having tightening fixtures made of plastic, be careful not to use excessive torque: doing
so will damage the plastic parts. Pay enough attention when you tighten up.
Apply the following table for Hydraulic Hose.
Taper seal
Thread
diameter
of bolt
(a)(mm)
Width
across
flats
(b)(mm)
Tightening torque
Target value Service limit
N
·
mkgf
·
mlbft N
·
mkgf
·
mlbft
10 14 14.7 1.5 10.8 12.7-16.7 1.3-1.7 9.4-12.3
14 19 29.4 3.0 21.7 27.5-39.2 2.8-4.0 20.3-28.9
18 24 78.5 8.0 57.3 58.8-98.1 6.0-10.0 43.4-72.3
22 27 117.7 12.0 86.8 88.3-137.3 9.0-14.0 65.1-101.3
24 32 147.1 15.0 108.5 117.7-176.5 12.0-18.0 86.8-130.2
30 36 215.7 22.0 159.1 176.5-245.2 18.0-25.0 130.2-180.8
33 41 255.0 26.0 188.1 215.7-284.4 22.0-29.0 159.1-209.8
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Komatsu HM400-1 Specifications

General

Brand	Komatsu
Model	HM400-1
Category	Trucks
Language	English