30
4.6
Maintenance and lubrication
•
Clean the disc harrow from soil after each use and inspect the parts and assemblies.
•
After the first 4 hours of operation, re-tighten all bolts and periodically check them
for tightness.
•
Lubricate the lubrication points on the hinge pins daily during the machine’s service
life. Lubricate the bearings of the tubular roller and the levelling discs every 25
operating hours (not applicable to disc maintenance-free bearings – these bearings
do not require maintenance or lubrication).
•
Use thread adhesive and only genuine screws and nuts when replacing worn parts.
•
Always remember to tighten the screwed joints properly.
CAUTION! Periodic lubrication guarantees the long service life of the machine.
The long service life and efficiency of a machine depends to a large extent on regular
lubrication. Use mineral greases for lubrication. Clean the lubrication points thoroughly
before pressing or applying grease.
4.7
S
crew tightening torque
Screws, bolts and nuts should be tightened in the machine with the appropriate torque
depending on the strength class of the bolt and its thread size and pitch. The
corresponding torque values for tightening them are shown in Table 3.
