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unigreen 25
8 MAINTENANCE
(To be done with the machine and cardan shaft stopped)
The maintenance of the sprayer is essential for maintaining a high level of safety.
Also consult the single handbooks of the main components of the sprayer.
All of the maintenance operations and repairs must be carried out with the machine
and cardan shaft stopped and the tank and circuit clean of any residues of chemical
products.
8.1 PROGRAMMED MAINTENANCE
( TAB. N° 7)
We recommend using a table of programmed maintenance to follow in time to keep
the sprayer in an efficient working condition.
For major and important maintenance jobs we recommend using the normal
UNIGREEN assistance service available from your reseller, using original
UNIGREEN spare parts.
8.2 ROUTINE MAINTENANCE
= After every treatment, wash the inside of the tank and the entire circuit as
indicated in paragraph 4.13
= Periodically check that the suction and delivery filters are clean (see figure)
= Check the oil level in the volumetric compensator of the pump, as indicated in
paragraph 5.1.1
= The use of chemical products that are particularly damaging for a nitrile rubber mix
(ex.. herbicides and products for rice fields) can cause the diaphragm to break before
time.
In these conditions check the state of the components more often.
8.3 EXTRAORDINARY MAINTENANCE
At the end of a season of intense use, or every two years of normal use, it is a good
idea to have a specialised service technician perform a general check on the
machine.
8.4 MAINTENANCE OF THE HERBICIDE BOOM - SELF-LEVELLING DEVICE
- LIFTING SYSTEM
(to be done with the machine and cardan shaft stopped)
a)Check the state of wear of the nozzles and replace them when the delivery is over
30-35% of the theoretical level. Don’t clean with nails, bradawls or punches. Use
small brushes or compressed air.
- drain the pressure and stop the machine
- dismantle the screw or bayonet ring nuts holding the nozzles
- clean with a small brush or compressed air, don’t use nails, punches or bradawls
- reassemble the nozzles and the ring nuts, replacing the filters and seals.
b) Keep the joints greased.
c) If you are using the boom and you notice excessive pitching or the same closing
on sloping ground, you can load the spring more by screwing in the relevant nut.
d) If the external arms droop downwards after some use you can realign them using
the relevant adjustment screws:
- unscrew the locknut
- adjust the inclination by screwing in the screw
- tighten the locknut again to stop it unscrewing accidentally.
8.5 REPAIRS
We recommend having the normal UNIGREEN assistance service available from our
reseller perform any repairs or contact a specialised workshop. During all of the
repairs, in particular when welding, the machine and the circuit must be clean of any
residues of chemical product.
If the machine has to be lifted (for example to change a wheel) follow the instructions
in point 4.3 of the present handbook.
Also make sure the machine is stopped, connected to the tractor, and use the
relevant chocks to block the wheel still on the ground.
If you use a jack (manual or hydraulic) make sure you use a jack that is suitable for
the frame so it can’t slip and put it in the right position. The jack must be placed under
the main frame of the machine near the wheel to change. Make sure the ground is
compact: if necessary use wooden beams or other sufficiently resistant material to
broaden the supporting base of the jack.
8.6 STORAGE IN A WAREHOUSE AND TRANSPORTATION
The sprayer must be kept in a closed place away from excessive humidity and
protected from frost. Especially if electrical pressure regulators, electrical motors, a
spraying computer or similar components are fitted.
Before storing the machine, after you have washed it, apply a light coat of oil.
If the temperature might drop to below zero, drain any residual liquid or add roughly
0.5 L of normal antifreeze for auto vehicles.
To transport the machine follow the instructions in point 4.3 of the present handbook.
Dismantling the Suction Filter