31
32
Learn more. Visit hunterindustries.com/golf
INLET VALVE REMOVAL
I
INLET VALVE REMOVAL
INLET VALVE REMOVAL
Service And Installation
Caution
! Electric valve-in-head rotors are connected to pressurized main-line or sub-main piping.
This pressurized piping must be depressurized before servicing the inlet valve. Serious bodily
injury can occur if valve is removed when the piping is pressurized. Keep head and body parts
away from the rotor’s exposed internal openings at all times. Wear proper eye protection and
use the designated tools when servicing these rotors.
TOOLS NEEDED
(varies with rotor model)
Once the riser assembly has been removed, the following tools are used to remove, service and
replace inlet valves:
4
G800 Valve Tool
– PN 604000
4
16” Needle-Nose Pliers Tool
– PN 475600
4
G900 Valve Tool
– PN 052805
4
Snap-Ring Tool
– PN 052510
4
Manual Extraction Pump Tool
– PN 460302
4
TTS Valve Flushing Tool
– PN 609400
VALVE IDENTIFICATION
It is important to note that there are different types of inlet valves (also commonly known as foot
valves). If the incorrect inlet valve is installed, the rotor will malfunction. Hunter has a color-coding
system to help correctly identify these valves:
G800C
Check-O-Matic Rotors = Black screen attached to valve (FIGURE 72)
G800E
Electric V.I.H. Rotors = Tan screen attached to valve (FIGURE 73)
G900C
Check-O-Matic Rotors = Black screen attached to valve (FIGURE 74)
G900E
Electric V.I.H. Rotors = White screen attached to valve (FIGURE 75)
Warning:
If a black screened inlet valve is installed into an electric valve-in-head rotor, the rotor will not shut off.
If a tan or white screened inlet valve is installed into a check-o-matic rotor, the rotor will leak water
from the vent port during sprinkler operation and, the check height will be negatively affected.
INLET VALVE REMOVAL –
DISENGAGING THE SAFETY INTERLOCK FEATURE
Caution!
Electric valve-in-head rotors are connected to pressurized main-line or sub-main piping.
This pressurized piping must be depressurized before servicing the inlet valve. Serious bodily
injury can occur if valve is removed when the piping is pressurized. Keep head and body parts
away from the rotor’s exposed internal openings at all times. Wear proper eye protection and use
the designated tools when servicing these rotors.
With the main-line or sub-main depressurized
and the riser assembly removed, proceed with
disengaging the G800 inlet valve’s safety
interlock feature as follows:
Remove the water inside the rotor’s body using
a manual hand pump. Look into the body cavity
and take note of the white lower snap-ring
and just below, the black top of the inlet valve
(FIGURE 76). The white snap ring may be
stained from the water, making it gray or brown
colored (FIGURE 77). To help prevent removal
of the inlet valve with the main-line or sub-main
pressurized, a safety interlock feature has been
added to the white lower snap-ring. Before the
white lower snap-ring and inlet valve can be
removed, this safety interlock feature must be
disengaged.
To disengage the safety interlock feature, place
the tip of the 16” Needle-Nose Pliers Tool on top
of the inlet valve. Next, press downward on the
inlet valve. The inlet valve should move down
slightly. If no movement is observed or felt, stop
and confirm that the main-line or sub-main has
been depressurized.
If main-line or sub-main has been shut off, it
is possible that resident pressure is still within
the line and this pressure is preventing the
inlet valve from moving downward. To relieve
this pressure, activate a near-by quick coupler
or, turn the rotor’s selector cap to the manual
ON position. Warning – rotor may activate for a
brief period of time. Use the 16” Needle-Nose
Pliers Tool to press downward on the inlet valve
again. The white lower snap-ring and inlet valve
are now ready for removal.
Fig 72
Fig 73
Fig 74
Fig 75
FIGURE 72
FIGURE 73
FIGURE 74
FIGURE 75
Fig 76
Fig 77
Fig 76
Fig 77
FIGURE 76
FIGURE 77
