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Post-season maintenance
After the end of the working season, thoroughly clean the disc harrow, repair the damaged
paint coating and the worn working surfaces of the tines, discs, strings and roller rings as
well as the threads of the adjusting screws must be cleaned with “Antykor” kerosene and
protected against corrosion with “Antykor 1” grease; moreover, a full lubrication must be
carried out. It is recommended to store the machine under a roof during the operational
break. However, if this is not possible, check the condition of the protection from time to
time and supplement the grease washed away by the rain, if necessary.
GAL driving system maintenance
Regular checks of tyre pressure.
If air leakage in the tyres is considerable, check
tightness of the air valve. Next, have the wheel inspected by a specialised company to
locate and repair the damage. Considerably damaged tyres (particularly the tyre profile)
must be replaced immediately.
Setting the axle clearance of wheel bearings.
It is recommended that this task be carried out by a specialised company. This is done by
tightening the nut on the wheel hub once the wheels are dismounted. A clearance of 0.12-
0.15 mm is recommended. Inspection and adjustment should be carried out every 2 years.
Procedure:
•
Dismount the hub cover and the spring pin securing the spring nut.
•
At the same time as spinning the hub, press and tighten the crown nut.
•
Stop tightening when with a vigorous manual rotation there is no more than a half-
turn of the hub.
•
Loosen the nut partially until the hub can rotate freely and repeat the tightening
step.
•
After repeated rotation locking, loosen the nut by max. 30° until the immediate
nut locking with a pin is possible. Mark the position with a line.
•
From the marked position unscrew the nut a half turn, and slightly tapping on the
hub press the hub onto the nut as far as possible.
•
Keep tightening the nut until it reaches the position marked with the line.
•
Mount the hub cover.
CAUTION! During maintenance, the unit must be secured against rolling
away (it must be connected to a tractor with the parking brake on) and
unfolded.
Hydraulic system maintenance
Maintenance of the hydraulic system consists in visual inspections for leak tightness.
Remember to insert pins into quick-fit connectors. If there is an oil leakage from
connections of hydraulic hoses, the connector must be tightened. If the oil leakage is not
remedied, replace the element or the hose with a new one. If the leakage occurs outside
the connector, replace the leaking hose with a new one. Mechanical damage also requires
replacement of the subassembly. It is recommended that the hydraulic hoses be replaced
every 5 years.
If oil appears on the piston rod of the hydraulic cylinder, check for the nature of the
leakage. Check the sealing once the piston rod is fully moved out. Small leakage which
results in covering the piston rod with an oil film is acceptable (damaged wiper seal). If
