ENGLISH 5
10 Maintenance, cleaning and storage
10.1 Maintenance plan
Before starting work:
x Check the entire sprayer is operationally safe by:
o Visual inspection of the sprayer
o Checking the tightness of all parts (at
maximum admissible pressure with the hand
valve opened and closed).
o Checking the working of all functional parts
(pump, hand valve).
o Checking the hoses and their screw
connections.
After the end of work, when changing the spray
formula, whenever required:
x Cleaning the spray tank chap. 10.6
x Cleaning the nozzles and filters chap. 10.6
Monthly or at the start of the season, whenever
required:
x Checking the output volume chap. 10.3
x Greasing the sealing rings chap. 10.5
10.2 Test run
When the spraying season starts and then every
month, the following items must be checked in a
test run with clean water:
x Tightness of all sprayer parts at maximum
admissible pressure with the hand valve opened
and closed
x Function of all working parts (hand valve, pump)
x Dosage and distribution accuracy
x Calibration of output volume according to
chap. 10.3
In case of irregularities, damage, leaks or limited
function, do not use the sprayer but have it
checked in a specialist workshop without delay.
10.3 Calibration of the output volume
Fill the sprayer with water to the maximum mark
and spray with a working pressure of 2 bar [29 psi]
for precisely one minute. Then measure the water
volume required when refilling to the maximum
mark. The application volume must not deviate
from the indicated value (chap. 11) by more than
10%; otherwise, clean the nozzle and the filter
insert and repeat the measurement procedure.
If the application volume is not correct even after
cleaning, replace the nozzle and/or filter
insert. Chap. 10.4
10.4 Replace the spray nozzle and/or filter
x Flush the nozzle assembly with clean water.
x Unscrew the nozzle assembly.
x Clean the O-rings, filter insert and spray nozzle
with clean water and soft brush. Do not blow out
the spray nozzle by mouth! Do not clean nozzles
with any hard objects!
x Replace the nozzle with a new nozzle and/or
new filter insert.
x Screw the parts of the nozzle assembly back
together (Fig. 2).
10.5 Greasing the sealing rings
Greasing the cap gasket
Fig. 6:
For proper sealing of the spraying agent tank, the
cap gasket (l) must be well greased with silicone
grease.
Greasing the pump piston sealing ring
If the pump is hard to operate, the sealing ring of
the pump piston (Fig. 10, pos. m, part no.: 10675)
should be greased with silicone grease or replaced
if necessary.
Disassembly of the pump and greasing the
sealing ring:
Fig. 7: Ensure the sprayer is empty and not
pressurised. Place sprayer securely on level
ground. If the pump is completely screwed onto the
tank, loosen the pump with 1–2 turns.
Fig. 8: Firmly hold the pump handle with both
hands and push downwards until the pump
releases from the flange housing with an audible
click. Unscrew the red flange housing from the
sprayer and remove the pump from the tank.
Fig. 9: Use a screwdriver to lever both black flange
semi-circles from the pump cylinder. The pump
piston can now be pulled from the pump cylinder.
Fig. 10: The sealing ring (m) can now be re-
greased with silicone grease or replaced if
damaged.
Assembly:
Fig. 11: Place the red flange housing correctly on
the pump piston.
Push the pump piston into the pump cylinder.
Push both black flange semi-circles onto the pump
cylinder until they lock with an audible click.
Fig. 12: Place the pump cylinder securely on level
ground. Line up the red flange housing in the exact
position and firmly push the red flange housing
down with both hands onto the pump cylinder until
the parts lock together with an audible click.
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