If you have a positive displacement pump or a cen trif u gal
pump capable of generating excessive pressure, you must
in stall a pressure relief valve and adjust it to a safe max i-
mum pressure. If a positive dis place ment pump is operated
without a pressure relief valve, damage may re sult to pump
or other plumbing component.
See illustration 14.
Range Adjust Valve
With oversized pumps, it may be necessary to install a
range adjust valve. The range adjust valve will reduce the
pump’s output to the rest of the system. Ad just ment of this
valve is covered in the Pre-Field checkout, pages 31-32.
See
illustration 15.
16
illustration 14
illustration 15
illustration 16
Installation
(cont)
Pressure Relief Valve
Tee “C”
Tee “A”
Pressure
Relief Valve
For Positive displacement Pump
For Oversized Pumps
Tee “C”
Range
Adjust Valve
Tee “A”
Installing Pressure Sensor
If you are using a pressure sensor, it must be installed before
the boom shut-off valves in your plumbing configuration.
Install the pressure sensor in the main sprayer line as close
to the boom shut-off valves as possible.
See illustration 16.
Locate the flow/run/hold cable harness and connect to the
mating (2-pin) connector with the NATURAL tie . Connect the
blue chassis ground wire to a good frame ground. Make sure
there is good metal-to-metal contact.
NOTE: The console display area for pressure will be blank
until initial nulling is complete.
To null the pressure sensor:
Place the
1.
RUN/HOLD switch in HOLD.
Turn the rotary dial to
2.
PRESSURE.
Press and hold the “ - ” switch for three seconds. A “0”
3.
should show on the display.
NOTE: The pressure offset can be re-nulled if a new sensor is
installed, or at any time, but the display cannot be blanked
once it is set.
(in other words, if the sensor is removed, the
pressure display will still show a value, not blank).
Pressure Sensor
