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Servicing Pilot Valve
NEVER STAND OR LEAN OVER THE SPRINKLER WHILE THE IRRIGATION SYSTEM IS BEING FILLED,
DURING MANUAL OR AUTOMATIC OPERATION OR WHEN PERFORMING SPRINKLER SERVICE
PROCEDURES. DIRECT CONTACT WITH IRRIGATION SPRAY, A FAILED OR IMPROPERLY INSTALLED
SPRINKLER CONNECTION OR SPRINKLER COMPONENTS FORCIBLY EJECTED UPWARD UNDER
PRESSURE CAN CAUSE SERIOUS INJURY.
Note: Refer to Figure 11 for the following
procedure.
1. Make sure that the water supply to sprinkler is
positively shut off and any residual pressure
has been bled off. If the sprinkler is
pressurized, main valve will open when the
pilot valve is disconnected from control tube.
2. Carefully remove turf and soil from side of
sprinkler to expose pilot valve and control
tubing.
3. Remove two retaining screws from the pilot
valve housing (1).
4. Pull the pilot valve assembly away from the
sprinkler body and cut the control tubing just
below tube retainer. Unless pilot valve has
been previously removed, control tubing
length will be sufficient for re-connection.
5. Remove tube retainer and remaining piece of
control tubing from valve body fitting.
8. Pull pilot valve body assembly out of
housing.
6. Remove solenoid (2) by turning it
counterclockwise.
7. Remove selector shaft assembly (6) and
plunger assembly (3). (The selector shaft
retains the plunger in the valve body.)
9. Remove diaphragm assembly (10), piston (9), spring (8) and o-ring (4).
10. Thoroughly clean and inspect all parts. Replace damaged parts as necessary and reassemble in reverse order.
Note: Refer to Illustrated Parts Breakout Book, form number 368-0044 for service part numbers.
Flushing Sprinkler ______________________________________________________________
NEVER STAND OR LEAN OVER THE SPRINKLER WHILE THE IRRIGATION SYSTEM IS BEING FILLED,
DURING MANUAL OR AUTOMATIC OPERATION OR WHEN PERFORMING SPRINKLER SERVICE
PROCEDURES. DIRECT CONTACT WITH IRRIGATION SPRAY, A FAILED OR IMPROPERLY INSTALLED
SPRINKLER CONNECTION OR SPRINKLER COMPONENTS FORCIBLY EJECTED UPWARD UNDER
PRESSURE CAN CAUSE SERIOUS INJURY.
1.
With sprinkler operating, carefully step down on center of cap several times. Water will flow around riser and flush out debris.
2.
Cycle sprinkler on and off several times to check for proper retraction. Cap should be even with top of body flange when fully
retracted. If riser sticks in up position, check for debris lodged between riser and body. Flush out all debris. Remove sprinkler
mechanism if necessary.
© 2002 The Toro Company, Irrigation Division
WARNING
Figure 11
4
2
3
WARNING
6
7
5
8
1
Form Number 373-0244 Rev. A
10
9
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