Residual Spraying Agents / Finishing Spraying; Maintenance, Cleaning And Storage; Trial Run; Checking The Spray Nozzles And The Filter Element By Measuring The Spraying Agent Delivery Rate - Solo 425 Originalbetriebsanleitung Und Gebrauchsanweisung

5 Using the backpack sprayer / 6 Maintenance, cleaning and storage
The red clip can be used to secure the shut-off
valve in its rest position to prevent accidental
spraying. For this, pull the lever slightly away (a)
from the handle and lock the clip (b).
The spray tube can be rotated in the shut-off valve
– after loosening the threaded collar (Fig. 2, e) –
this is useful for spraying under leaves.
If the spraying agent is not applied properly, spray
nozzle or filter element could be blocked or
damaged. If necessary, clean or replace the nozzle
and the filter element.
Cleaning: See section 6.6
Replacing the spray nozzle and the filter element:
See section 6.3
5.2 Residual spraying agents /
finishing spraying
Stop spraying immediately when any air is sucked
in and sprayed out through the spray nozzle. This
is indicated by a mist being sprayed from the
nozzle. At this point the spraying agent tank will still
contain a residual amount of less than 200 ml
[6.8 oz]. If you do not want to add more spraying
agent and wish to stop spraying instead, dilute this
leftover amount with two litres [68 oz] of clean
water and spray it on the treated area.
When you finish working, prepare the device for
storage according to section 6.6, thoroughly wash
your face and hands with soap, take off your work
clothing and ensure that it is washed regularly.

6 Maintenance, cleaning and storage

6.1 Trial run

At least at the start of every spraying season and in
frequent use at least once a month, perform a trial
run with clean water to check the following:
x Tightness of all equipment components at
maximum permissible pressure with open and
closed shut-off valve
x Function of all active components
(shut-off valve, LX pump lever, pressure gauge
(depending on the model))
x Dosing and distribution accuracy of all the
nozzles used by measuring the spraying agent
delivery rate according to section 6.2
ENGLISH 10
Never start working if there are any irregularities or
leaks, if you can see any damage to the equipment
or if the equipment is not working properly in any
way. In this event, immediately have the device
checked by a specialist workshop.
6.2 Checking the spray nozzles and the filter
element by measuring the spraying agent
delivery rate
Fill up the tank with clean water to the maximum
marking, start it up and spray for exactly one
minute at an operating pressure of 2 bar [29 psi].
Then measure the quantity of water required to
refill the tank to its maximum level. The value
measured corresponds to the delivery rate of the
device in l/min for the selected operating pressure.
This value must not deviate by more than 10 %
from the value indicated in section 10.
If the actual value is too low, this may be caused
by deposits in the spray nozzle and/or in the filter
element. Clean the parts and repeat the check.
If the actual value is too high, this may be due to
wear or damage to the spray nozzle.
When checking the nozzles, also check whether
the spray nozzle is producing an even, fan-shaped
spray pattern.
If the delivery rate is still too low after cleaning the
nozzle and the filter element, or if the nozzle and/or
the filter element are worn or damaged, replace the
nozzle and/or the filter element by genuine SOLO
replacement parts.

Changing the spray nozzle and the filter element:

See section 6.3
6.3 Changing the spray nozzle and the
filter element
Only the spray nozzles listed in section 10 and the
genuine filter element (part no.: 40 74 922 25,
mesh aperture: 0.8 mm [0.031"]) must be used in
this backpack sprayer.
Spray nozzle and filter element must only be
changed if the device is depressurised.
To depressurise the device, hold the spray tube in
the spraying agent tank or in a suitable container
for the spraying agent and operate the shut-off
valve until no more fluid is sprayed.
Changing the spray nozzle or the filter element:
x Rinse the nozzle attachment with clean water.
x Disassemble the nozzle attachment (Fig. 2).
x Clean the O-rings, the filter element and the
spray nozzle with clean water and a soft brush.
Never use your mouth to blow through the spray
nozzle! Never use hard objects to clean the
nozzles!