Kubota GR1600EC2, Workshop Manual, Page: 22 / 241

G-9
GR1600EC2, WSM G GENERAL
5. TIGHTENING TORQUES
[1] GENERAL USE SCREWS, BOLTS AND NUTS
Screws, bolts and nuts whose tightening torques are not specified in this Workshop Manual should be tightened
according to the table below.
W1034542
[2] METRIC SCREWS, BOLTS AND NUTS
W1016172
Indication on top of
bolt
No-grade or 4T 7T 9T
Material of bolt SS400, S20C S43C, S48C SCr435, SCM435
Material of opponent
part
Ordinariness Aluminum Ordinariness Aluminum Ordinariness
Unit
Diameter
N·m kgf·m ft-lbs N·m kgf·m ft-lbs N·m kgf·m ft-lbs N·m kgf·m ft-lbs N·m kgf·m ft-lbs
M6
(6 mm, 0.24 in.)
7.85
to
9.31
0.80
to
0.95
5.79
to
6.87
7.85
to
8.82
0.80
to
0.90
5.79
to
6.50
9.81
to
11.2
1.00
to
1.15
7.24
to
8.31
7.85
to
8.82
0.80
to
0.90
5.79
to
6.50
12.3
to
14.2
1.25
to
1.45
9.05
to
10.4
M8
(8 mm, 0.31 in.)
17.7
to
20.5
1.8
to
2.1
13.1
to
15.1
16.7
to
19.6
1.7
to
2.0
12.3
to
14.4
23.6
to
27.4
2.4
to
2.8
17.4
to
20.2
17.7
to
20.5
1.8
to
2.1
13.1
to
15.1
29.5
to
34.3
3.0
to
3.5
21.7
to
25.3
M10
(10 mm, 0.39 in.)
39.3
to
45.1
4.0
to
4.6
29.0
to
33.2
31.4
to
34.3
3.2
to
3.5
23.2
to
25.3
48.1
to
55.8
4.9
to
5.7
35.5
to
41.2
39.3
to
44.1
4.0
to
4.5
29.0
to
32.5
60.9
to
70.6
6.2
to
7.2
44.9
to
52.0
M12
(12 mm, 0.47 in.)
62.8
to
72.5
6.4
to
7.4
46.3
to
53.5
– – –
77.5
to
90.2
7.9
to
9.2
57.2
to
66.5
62.8
to
72.5
6.4
to
7.4
46.3
to
53.5
103
to
117
10.5
to
12.0
76.0
to
86.7
M14
(14 mm, 0.55 in.)
108
to
125
11.0
to
12.8
79.6
to
92.5
– – –
124
to
147
12.6
to
15.0
91.2
to
108
– – –
167
to
196
17.0
to
20.0
123
to
144
M16
(16 mm, 0.63 in.)
167
to
191
17.0
to
19.5
123
to
141
– – –
197
to
225
20.0
to
23.0
145
to
166
– – –
260
to
304
26.5
to
31.0
192
to
224
M18
(18 mm, 0.71 in.)
246
to
284
25.0
to
29.0
181
to
209
– – –
275
to
318
28.0
to
32.5
203
to
235
– – –
344
to
402
35.0
to
41.0
254
to
296
M20
(20 mm, 0.79 in.)
334
to
392
34.0
to
40.0
246
to
289
– – –
368
to
431
37.5
to
44.0
272
to
318
– – –
491
to
568
50.0
to
58.0
362
to
419
Grade
Property class 8.8 Property class 10.9
Unit
Nominal
Diameter
N·m kgf·m ft-lbs N·m kgf·m ft-lbs
M 8 23.6 to 27.4 2.4 to 2.8 17.4 to 20.2 29.4 to 34.3 3.0 to 3.5 21.7 to 25.3
M 10 48.1 to 55.8 4.9 to 5.7 35.5 to 41.2 60.8 to 70.5 6.2 to 7.2 44.9 to 52.1
M 12 77.5 to 90.1 7.9 to 9.2 57.2 to 66.5 103.0 to 117.0 10.5 to 12.0 76.0 to 86.8
M 14 124.0 to 147.0 12.6 to 15.0 91.2 to 108.0 167.0 to 196.0 17.0 to 20.0 123.0 to 144.0
M 16 196.0 to 225.0 20.0 to 23.0 145.0 to 166.0 260.0 to 303.0 26.5 to 31.0 192.0 to 224.0
KiSC issued 07, 2006 A