6 - Maintenance
111
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 RANGER PRO VH
Page 4: ...1 EU Declaration 4 ...
Page 10: ...Table of Contents 6 ...
Page 108: ...5 Operation 104 ...
Page 111: ...6 Maintenance 107 Boom Lubrication Oiling Plan Lubrication Oiling Plan Trailer Paralift ...
Page 142: ...6 Maintenance 138 ...
Page 164: ...Index 160 ...
Page 166: ...HARDI INTERNATIONAL A S Herthadalvej 10 DK 4840 Nørre Alslev DENMARK ...