Hunter G800 Series Owner's Manual page 27

SOLENOID & PILOT VALVE ASSEMBLY REMOVAL
The plunger assembly is retained within the Solenoid with a secure snap-fit feature. To remove the
plunger assembly, first notice there is a black knurled ring just below the solenoid's rubberized
seat-seal. Just below the black knurled ring is a black O-Ring. The plunger assembly can be removed
by forcing the thumb-nail under the black knurled ring and pulling to separate the plunger
assembly from the solenoid (FIGURE 134). Alternatively, a small flat bladed screwdriver can be
inserted below the black knurled ring and twisted to release the plunger assembly. Use care not to
damage the black O-Ring. If the plunger assembly does not stay assembled when removed from
the solenoid, it is necessary to replace the Plunger assembly.
Rinse the plunger assembly and solenoid with clean water to remove any contaminating debris. If
damage or worn, replace black O-Ring and/or rubberized seat-seal (FIGURE 135). Insert plunger
assembly into the solenoid and then press to engage the snap-fit feature. Finally, press on the
seat-seal to cycle the plunger assembly. If plunger does not cycle up and down freely, repeat
cleaning procedure and/or replace the plunger assembly.
FIGURE 133 FIGURE 134
Fig 132
Fig Fig
133 133
Solenoid Replacement – It is not necessary to dig around the rotor to replace in-ground solenoid
wire splice connections if there is confidence in both the quality of the splices and the type of
connector used. It is absolutely not necessary to dig around the rotor to replace the solenoid wire
splice connections if the original connecting splices were completed within the rotor's flange
compartment.
In-ground with questionable wire splice connections –
splice connections. Remove the connectors. If possible, run controller wires into the rotor's flange
compartment and splice wires to solenoid's wires using appropriate grease-filled connectors.
If not possible, feed replacement solenoid's wiring through hole at the bottom of the flange
compartment. Splice controller wires with solenoid's wires using appropriate grease-filled
connectors. Choose either of the Hunter DC solenoid's lead wires when making each splice as
there is no specific polarity required.
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I TABLE OF CONTENTS
FIGURE 135
Fig Fig
134 134
dig around the rotor to access the solenoid
IMPORTANT – the TTS rotor's top service capabilities require that there is sufficient slack in the
Solenoid's wiring leads within the flange compartment. To estimate required wiring slack, bring
Solenoid to the top of the rotor's flange. During back-fill of soil around rotor, do not let the
Solenoid be pulled into the flange compartment.
In-ground good quality wire splice connections –
Hold the defective solenoid in one hand and
cut the defective Solenoid's two lead wires at
a point close to the defective solenoid. Splice
the lead wires from the defective solenoid to
the new solenoid's lead wires using appropriate
grease-filled connectors. If needed, the new
Solenoid's lead wires can be shortened to
minimize excess wiring within the flange
compartment.
PILOT VALVE REPLACEMENT
See the warning above regarding rotor activation
when Solenoid is loosened or Pilot Valve tubing
is disconnected. There are no serviceable parts
within the TTS rotor's Pilot Valve assembly. If
the filter inside the Pilot Valve becomes
obstructed, the water flow through the Pilot
Valve can be reduced. A substantial reduction in
water flow through the Pilot Valve will prevent
the rotor's Inlet Valve from opening fully.
Fig 135
FIGURE 136
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TABLE OF CONTENTS I PILOT VALVE REPLACEMENT
Flange compartment wire splice connections –
If original wire splice connections were made
within the flange compartment, simply disconnect
splices and re-splice controller wiring to the
new Solenoid's wiring leads. Confirm that
appropriate grease-filled type connectors are in
use. If not, discard and replace with appropriate
connectors. If needed, the new Solenoid's lead
wires can be shortened to minimize excess
wiring within the flange compartment.
Notice the two tubes attached to the Pilot
Valve's fittings (FIGURE 136). The lower fitting is
the inlet and the upper fitting is the outlet. The
lower tube is the pressurized supply tube that
comes from the rotor's Inlet Valve at the bottom
of the rotor. The upper tube goes from the Pilot
Valve to the inlet of the pressure regulator. To
replace the Pilot Valve, use side-cutters or blade
to make clean cuts at points just before the
fittings on the Pilot Valve. Trim & remove the
remaining tube from fittings.
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