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MAINTENANCE
STANDARD TIGHTENING TORQUES FOR BOLTS AND NUTS
TORQUE LIST
NOTICE
When tightening a bolt through panels made of resin, they will be broken at the base, if an excessive tightening toque is applied
to the bolt. Be careful not to exceed the right tightening torque.
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
·
m
kgf
·
m
lbft
N
·
m
kgf
·
m
lbft
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
Apply the following table for Hydraulic Hose.
Thread
diameter
of bolt
(a)(mm)
Width
across
flats
(b)(mm)
Tightening torque
Target value
Service limit
N
·
m
kgf
·
m
lbft
N
·
m
kgf
·
m
lbft
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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Summary of Contents for GALEO BR550JG-1
Page 1: ...https tractormanualz com...
Page 2: ...1 1 https tractormanualz com...
Page 4: ...FOREWORD FOREWORD 1 3 https tractormanualz com...
Page 5: ...FOREWORD FOREWORD 1 4 https tractormanualz com...
Page 14: ...2 1 https tractormanualz com...
Page 19: ...SAFETY SAFETY LABELS POSITIONS OF SAFETY PICTOGRAMS 2 6 https tractormanualz com...
Page 50: ...3 1 https tractormanualz com...
Page 93: ...OPERATION OPERATION CHECK OF JAW CRUSHER AND RELATED ACCESSORIES 3 44 https tractormanualz com...
Page 117: ...OPERATION OPERATION UNIT OPERATOR S POSITION AT WORKSITE 3 68 https tractormanualz com...
Page 145: ...OPERATION TRANSPORTATION 3 96 https tractormanualz com...
Page 171: ...4 1 https tractormanualz com...
Page 181: ...MAINTENANCE WEAR PARTS 4 11 https tractormanualz com...
Page 183: ...MAINTENANCE WEAR PARTS 4 13 https tractormanualz com...
Page 189: ...MAINTENANCE STANDARD TIGHTENING TORQUES FOR BOLTS AND NUTS 4 19 https tractormanualz com...
Page 256: ...5 1 https tractormanualz com...
Page 258: ...SPECIFICATIONS SPECIFICATIONS 5 3 https tractormanualz com...
Page 259: ...6 1 https tractormanualz com...
Page 275: ...ATTACHMENTS OPTIONS MUCK DISCHARGE CONVEYOR 6 17 https tractormanualz com...
