Hardi ALPHA 2000, Instruction Book

Page: 15 / 52

15
ALPHA
Self-cleaning filter
Operating Diagram
1. From pump
2. Double filter screen
3. Guide cone
4. To operating unit
5. Replaceable restrictor
6. Return to tank
7. Nut
Choice of restrictor
It is important to have a large
flow through the filter. This is
achieved by choosing the
restrictor size in relation to
the liquid consumption of the
spray boom.
4 restrictors are supplied. Use
the green one
(largest orifice first).
The hose N is demounted at
the self-cleaning filter, the
restrictor is put in the hose
and the hose is mounted
again.
If the required working pressure cannot be obtained, the
restrictor is too large. Choose a smaller restrictor.
Start with a black one, then a white and finally a red one.
When cleaning the filter remove hose N and the hose at
the safety valve, and check there are no residues.
Standard filter size is 80 mesh. Sizes of 50 and 100
mesh are available and can be changed by opening the
filter top and replace the strainer. Check the O-rings be-
fore reassembling the filter and replace if damaged.
Use of MANIFOLD valve system
The following pictograms and colours are used for the
visualizing the function of the MANIFOLD valves:
Green disc = Pressure valve
Black disc = Suction valve
Blue disc = Return valve
To operate the spraying functions:
• Turn the handle on a green pressure valve towards
the function desired
• Turn the handle on a black suction valve towards the
desired function
• Turn the handle on the blue return valve towards the
desired direction of return flow
• Close all remaining valves by setting the handle(s)
on “ O ”
IMPORTANT! The valves and functions may vary from
machine to machine depending on optional equipment
fitted. Only the functions to be used must be open - Al-
ways close remaining valves.
Black disc = Suction valve
From main tank
(suction filter)
From Rinsing
Tank
Green disc = Pressure valve
To Self-Cleaning
Filter/operating
unit
To Fast Filling
Device
To HARDI
FILLER
To Tank Flushing
Nozzle
To main tank
From Filling Device
Agitation
(spraying position)
Pumpsuction line
(to facilitate emp-
tying the tank
completely)
Blue disc = Return valve
N
T140-0014
T059-0001
T020-0002