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NOTE! When carrying out repairs and maintenance, the machine should
be lowered to the ground and supported on supports to ensure full
stability and the tractor engine switched off. Use proper spanners and
protective clothing during maintenance and repairs.
Table 4 Causes and remedies for faults and malfunctions of the SAL disc harrow.
Fault, malfunction
Reason
Repair method
- uneven penetration of working
elements
- poor levelling of the machine
- level the machine longitudinally
and transversely
- poor penetration of the discs
- discs excessively worn
- shaft too low
- disc pressure too low on
compacted soil
- replace the discs
- lift the shaft
- lack of complete stubble
undercutting
- disc working depth too shallow
- increase the working depth of
the discs
- deep furrow at the junction of
the working passages
- misaligned side screen
- improve the positioning of the
side screen
- spreading the soil over the shaft - no rear screen
- shaft too close to the discs
- mount the rear screen
- move the shaft away from the
discs
- clogging the discs
- working depth too deep
- reduce the depth
- clogging up the side screen
- too much crop residue
- remove the side screen
- poor soil compression by the
shaft
- wrongly levelled harrow
- lengthen the top link
- shaft too high
- lower the shaft
7. Storage of the disc harrow
The disc harrow should be stored under cover. In the absence of a covered area,
outdoor storage of the machine is permitted.
Parts and assemblies should be inspected after the working season. If damage or
significant wear is found, replace the relevant parts with new ones. Clean areas of paint
damage from dirt, rust and touch up with anti-corrosion paint, then top coat. Protect
the working surfaces of the disc harrow and roller from corrosion. It is advisable to store
the machine under a canopy when not in use. However, if this is not possible, the
condition of the protection should be checked from time to time and the maintenance of
the working elements should be repeated when the preservative layer is rinsed away by
rain.
Clean the piston rods of the hydraulic cylinders during winter and when the
machine is not in use for a long period of time, and protect them with vaseline or
acid-free grease to protect them from corrosion.
The machine, when uncoupled from the tractor, should support itself on firm and
level ground, maintaining a firm balance. All work units should rest on the ground. The
machine should be lowered gently so as not to expose the working parts to impact on
hard ground. Once the machine is down, disconnect the suspension system and drive the
tractor away. Also, components dismantled from the machine must be stored securely on
the ground, excluding the possibility of uncontrolled movement. It is advisable to store
