34 Installation - Speed Sensors
SERVO VALVE
The Servo Valve is a stepper motor driven Butter-
fly control valve that is used to control the flow in
the system as directed by the 8605 controller.
Determine Valve placement for either an Inline
system or Bypass system.
IMPORTANT - If you have a very low applica-
tion rate the Servo Valve must be installed in
bypass.
In general, any mechanical pressure regulator
already on the sprayer does NOT have to be
removed. However, specific adjustments to this
regulator are usually required and are described
under sprayer set-up.
The Servo Valve has a 1 inch female NPT on
both ends. If required, reducing bushings may
be used; however, keep the bypass line as big
in diameter as possible. Using 1/2 inch line may
severely limit the effective range of the Servo
Valve.
If the Servo Valve is mounted in an existing by-
pass line or agitation line, be sure to remove
any parts that may restrict the flow. For exam-
ple, some agitation lines have nozzles inside the
tank; this would severely limit the range of the
Servo Valve and must not be used.
Flow direction through the Servo Valve is not
critical, there is no “in” and “out” installation re-
quirement.
The Servo Valve can be mounted at any angle.
If possible, mount it with the cover upwards so it
will limit the accumulation of rain and dirt.
The Servo Valve is stainless steel. Maximum op-
erating pressure is 400 PSI.
Be sure to use pipe thread sealer on all connec-
tions to prevent leaks.
The Servo Valve comes with a 20 foot cable which
should be long enough to reach the tractor hitch.
A 10 foot cable is provided to go from the hitch
to the 8605 controller. Be sure to connect the 10
foot cable to the receptacle labeled “Servo.” Both
cables are labeled “Servo” for easy identification.
Extension cables are available, if required. Be
sure to route all cables away from moving or hot
parts. Use the cable ties provided.
DWG. NO. 111
REMOTE RUN/HOLD
For applications requiring remote RUN/HOLD a
switch can be connected to the RUN/HOLD con-
nector on the controller. Normally with no switch
connected, the controller will be in RUN (pro-
vided switch on controller is in RUN). With the
“normally open” RUN/HOLD switch connected,
the controller will be in RUN. When the switch
is pressed, the controller will enter the HOLD
mode.
DANGER: USE EXTREME CAUTION
WHEN USING THE REMOTE RUN/
HOLD FEATURE. ALWAYS SWITCH
THE CONSOLE OFF BEFORE LEAVING THE
TRACTOR OR ALLOWING ANYONE NEAR
THE IMPLEMENT. FAILURE TO DO SO COULD
CAUSE INJURY OR DEATH.
WIRING - GENERAL
For most applications a 10 foot extension cable
is connected to the controller, this will usually
reach the hitch area. A 20 foot extension cable
is usually sufficient to reach the valves and
flowmeter mounted on the sprayer.
Remember to secure all cables away from hot
parts or where they may become tangled.
