Servicing Pilot Valve

WARNING

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 19 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 the side of the sprinkler to expose pilot valve and control tubing.

3.Remove the two retaining screws from the pilot valve housing.

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.

6.Remove the solenoid (1 or 2) by turning it counterclockwise.

7.Remove the retaining nut (17) and washer (18) from the pressure adjuster (10) and pull the pilot valve body assembly out of housing (14).

Figure 19

 

 

14

8

13

9

12

7

10

11

 

15

1

 

6

 

4

 

2

 

5

16

17

 

3

 

8.Remove diaphragm assembly (14), piston (13), spring (12), traveling adjuster (11), pressure adjuster (10) and o-ring (6).

9.Remove selector shaft assembly (8) and plunger assembly (4). Note: The selector shaft retains the plunger in the valve body.

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 490-3043 for service part numbers.

Flushing Sprinkler ________________________________________________________________

WARNING

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.

© 2005 The Toro Company, Irrigation Division

Form Number 373-0380

Rev. A

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Toro 855S, 835S manual Flushing Sprinkler, Servicing Pilot Valve
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855S, 835S specifications

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