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22 unigreen
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