6 - Maintenance
90
Tightening Bolts and Nuts
When tightening bolts and nuts as a part of periodic service or due to replacement of spare parts, it is important to apply
the correct torque. This will prevent accidents and prolong the lifetime of the parts included in the bolted joints.
If not otherwise stated in this book, please tighten bolts and nuts using the following torques.
±
WARNING! Applying too little torque will result in these risks:
±
WARNING! Exceeding the maximum torque will result in these risks:
Bolt size
Recommended
torque (Nm)
Maximum
torque (Nm)
M4
2.4
3
M5
5
6
M6
8
10
M8
20
25
M10
39
50
M12
70
85
M14
112
140
M16
180
215
M18
240
305
M20
350
435
M22
490
590
M24
600
750
M27
976
1100
M30
1300
1495
•
bolted joints will rattle and thus fail under fatigue
•
bolts are being worn quickly and thus will not fulfil their design purpose
•
bolted joints will come loose
•
accidents caused by assembled parts coming apart due to bolts or nuts failing or falling off.
•
damaging or stripping the threads and deforming the fastener
•
bolt heads will be broken
•
bolted joints will come loose
•
accidents caused by assembled parts coming apart due to bolts breaking at a later time.
Summary of Contents for NK MB Series
Page 8: ...1 Identification 8 ...
Page 52: ...3 Description 52 ...
Page 62: ...4 Sprayer Setup 62 ...
Page 84: ...5 Operation 84 ...
Page 87: ...6 Maintenance 87 Boom Lubrication Oiling Plan Lift Lubrication Oiling Plan ...
Page 116: ...9 EC Declaration 116 ...
Page 120: ...Index 120 ...
Page 122: ...HARDI INTERNATIONAL A S Helgeshøj Allé 38 DK 2630 Taastrup DENMARK ...