Use of High Pressure Pump
ENGLISH 14
9. Use of High Pressure Pump
9.1 Scope of Application
This high pressure pump is suitable for the
application of approved liquid plant protection
material, pesticides, herbicides and liquid
fertilizers available from authorized trade
outlets. We recommend to only use plant
protection chemicals which have been approved
by your local, regional, state or federal
authorities. In Germany, the Federal Institute
for Biology (BBA) is responsible for the approval
of plant protection chemicals.
The areas of application for this high pressure
pump are agriculture, viticulture and
horticulture.
The machine is not to be used in windy and
rainy conditions to prevent the spread of the
spray material over a large area.
Check the wind direction prior to commencing
work.
Never spray towards open doors, windows, cars,
animals, children or anything that may be
damaged by chemicals.
Exercise extreme caution while spraying.
Generally there is less wind and air movement
during early morning and early evening hours. It
is recommended to spray during that time. Only
wet those plants and objects which are targeted.
In any case we recommend caution during the
spray operation.
9.2 Pressure Regulation
A certain spray pressure has to be maintained
depending on nozzle adjustment, nozzle type,
type of spray chemical, walking speed etc. The
pressure should be even and continuous. A
pressure gauge (16) fitted to the trigger handle
(15) indicates the pressure in the liquid delivery
system.
Note: The pressure gauge only shows the
pressure while liquid is flowing through the
pressure handle during actual spray operation.
Spray pressure can be altered by:
a) Changing the engine speed via the throttle
adjustment lever (8)
• Lower engine speed ! lower pressure
For high pressure set the throttle lever to full
throttle. For lower pressure adjust to ¾
throttle. This will save fuel.
b) Adjustment to Pressure Regulator (10)
• Turn clockwise to the right
! increased pressure,
• turn anti-clockwise to the left
! lower pressure.
Spray pressure should not exceed 30 bar. (Red
field on pressure gauge).
Hint:
While the engine is running, leave the spray
pressure set at low while using the throttle to
achieve the required engine speed. Then turn
the pressure regulator (10) to adjust to the
required pressure. This way the engine does not
have to work against high pump pressure during
the transition from idling speed to operating
speed.
Caution:
Avoid clutch slippage. If needed increase the
engine speed with the throttle lever after
adjusting the spray pressure with the pressure
regulator.
Never operate the engine for longer periods
with the pressure handle in the CLOSED
position. This applies particularly when high
spray pressure has been selected.
Fig. 10
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