Koyker KB660 Owner's Manual page 44

1. Tightening Bolts & Nuts
Check all loader bolts and nuts for tightness every 50 working hours. The movement of the loader
over rough terrain may cause bolts to come under pressure and over a long period of time some
slight stretching of the bolt may occur. The slack created may need to be taken up by tightening.
Please refer below for recommended torque settings.
Lubricated Dry
N*m Lb-ft N*m Lb-ft
M6 ...................... 9
M8 ...................... 22
M10 .................... 43
M12 .................... 75
M14 .................... 120
M16 .................... 190
M18 .................... 260
M20 .................... 375
M22 .................... 510
M24 .................... 650
M27 .................... 950
M30 .................... 1300
M33 .................... 1750
M36 .................... 2250
Lubricated
Size N*m Lb-ft N*m Lb-ft
1/4 ....................... 9.5
5/16 ..................... 20
3/8 ....................... 35
7/16 ..................... 55
1/2 ....................... 85
9/16 ..................... 125
5/8 ....................... 170
3/4 ....................... 300
7/8 ....................... 490
1 .......................... 725
1-1/8 ................... 900
1-3/8 ................... 1700
1-1/2 ................... 2250
DO NOT use these values if a different torque value or tightening procedure is given for a
specific application. Torque values listed are for general use only and include a +/- 10%
variance. Check tightness of fasteners periodically. DO NOT use air powered wrenches.
Shear bolts are designed to fail under predetermined loads. Always replace shear bolts with
identical grade.
TORQUE SPECIFICATIONS
Metric Recommended Torque Settings
Class 8.8
Lubricated
6.5 11 8.5 ...................... 13
16 28 20 ....................... 32
32 55 40 ....................... 63
55 95 70 ....................... 110
88 150 110 ..................... 175
140 240 175 ..................... 275
195 330 250 ..................... 375
275 475 350 ..................... 530
375 650 475 ..................... 725
475 825 600 ..................... 925
700 1200 875 ..................... 1350
950 1650 1200 ................... 1850
1300 2200 1650 ................... 2500
1650 2850 2100 ................... 3200
SAE Recommended Torque Settings
Grade 5
Dry Lubricated
7 12 9 ......................... 13.5
15 25 18 ....................... 28
26 44 33 ....................... 50
41 70 52 ....................... 80
63 110 80 ....................... 120
90 155 115 ..................... 175
125 215 160 ..................... 215
225 375 280 ..................... 425
360 625 450 ..................... 700
540 925 675 ..................... 1050
675 1150 1200 ................... 2050
1250 2150 1550 ................... 2700
1650 2850 2100 ................... 3600
Class 10.9
Dry
9.5
24
47
80
130
200
275
400
540
675
1000
1350
1850
2350
Grade 8
Dry
N*m Lb-ft N*m Lb-ft
10
21
36
58
90
130
160
310
500
750
1500
2000
2650
Page 42
Size N*m Lb-ft N*m Lb-ft
17 12
40 30
80 60
140 105
225 165
350 225
475 350
675 500
925 675
1150 850
1700 1250
2300 1700
3150 2350
4050 3000
17 12.5
35 26
63 46
100 75
150 115
225 160
300 225
550 400
875 650
1300 975
2600 1950
3400 2550
4550 3350