6 - Maintenance
84
Service and Maintenance intervals
General Info
The periodic service and maintenance work in this section may be carried out by the user. Contact your HARDI® dealer if in
doubt. If this work is completed correctly, the sprayer will run efficiently and its lifetime will be prolonged.
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 (Ft/lb)
M4 2
M5 4
M6 6
M8 15
M10 30
M12 50
M14 85
M16 135
M18 175
M20 260
M22 360
M24 445
M27 720
M30 960
• bolted joints will rattle and thus fail under fatigue
• bolts are being worn quickly and thus will not fulfill 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.
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