Toro Sprinkler DT34 User Manual

DT34 and DT54 Series Rotary Sprinklers  
Installation & Service Instructions  
Note: For preliminary use only.  
Introduction ______________________________________________________________________  
The DT34 and DT54 series full-circle rotary sprinklers are designed  
specifically for golf course applications.  
Manufactured from durable, high-strength engineering plastic and  
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stainless-steel components, these sprinklers incorporate many innovative  
and time-proven features for lasting, maintenance-free operation.  
Prior to installing the sprinkler, read through the recommended installation  
and start-up procedures. Please observe all WARNINGS and CAUTIONS  
when installing and operating this equipment.  
DT34 Electric Valve-In-Head  
DT54 Electric Valve-In-Head  
Features _______________________________________________________________________________  
Main nozzle trajectory allows for 25 and 15 degree selections  
Full 4" (10,1 cm) pop-up clears tall grasses  
Nozzles color-coded by radius and gallonage  
Cap serves as an effluent water indicator  
Variable stators  
Three body thread types available: NPT, BSP and ACME  
Manual sprinkler control, On-Off-Auto (electric models only)  
Bowl-vented discharge (atmospheric) minimizes the  
differential pressure required for regulation and ensures  
positive valve closure (electric models only)  
All internal components serviceable from the top of the  
sprinkler  
Selectable pressure regulation settings of 50 psi (3.4 bar),  
65 psi (4.5 bar), 80 psi (5.5 bar) or 100 PSI (6.9 bar) to  
ensure consistently accurate nozzle performance  
regardless of elevation (electric models only)  
Large selection of color-coded nozzles available  
Durable plastic and stainless-steel construction  
Optional radius reduction screw  
Three body activation types available: Electric VIH,  
Normally Open Hydraulic VIH, and Check-O-Matic  
Specifications and Performance/Application Data _______________________________________  
DT34 Series  
DT54 Series  
Radius: 52'–92' (15,9–28,0 m)  
Flow Rate: 15–50 GPM (56,7–189,3 LPM)  
Trajectory: Selectable 15° or 25°  
Arc: Full Circle  
Radius: 52'–100' (15,9 m–30,5 m)  
Flow Rate: 15–62 GPM (56,8–234,7 LPM)  
Trajectory: Selectable 15° or 25°  
Arc: Full Circle  
Recommended Operating Pressure: 65–100 PSI  
(4,5–6,9 Bar)  
Recommended Operating Pressure: 65–100 PSI (4,5–6,9 Bar)  
Minimum Pressure: 40 PSI (2,8 Bar)  
Maximum Pressure: 150 PSI (10,3 Bar)  
Precipitation Rate:  
Minimum Pressure: 40 PSI (2,8 Bar)  
Maximum Pressure: 150 PSI (10,3 Bar)  
Precipitation Rate:  
Minimum: 0.50"/hr (12,7 mm/hr)  
Maximum: 0.72"/hr (18,3 mm/hr)  
Minimum: 0.46"/hr (11,7 mm/hr)  
Maximum: 0.63"/hr (16 mm/hr)  
Body Height: 11" (27.9 cm)  
Pop-Up Height: 4.1875" (10.6 cm)  
Inlet Size: 1.5" NPT, BSP or ACME  
Solenoid:  
Body Height: 10" (25.4 cm)  
Pop-Up Height: 4.1875" (10.6 cm)  
Inlet Size: 1" NPT, BSP or ACME  
Electric Valve-in-head Solenoid:  
Inrush current: 0.30A @ 24 VAC, 50/60 Hz  
Holding current: 0.20A @ 24 VAC, 50/60 Hz  
Inrush current: 0.30A @ 24 VAC, 50/60 Hz  
Holding current: 0.20A @ 24 VAC, 50/60 Hz  
Manual Control (Electric VIH only): On-Off-Auto  
Check-O-Matic model checks up to 37' (11,2 m) of elevation.  
Nine Nozzle Variations: See chart on page 2.  
Manual Control (Electric VIH only): On-Off-Auto  
Check-O-Matic model checks up to 37' (11,2 m) of elevation.  
Seven Nozzle Variations: See chart on page 2.  
 
Installation Procedure ___________________________________________________  
To assure maximum performance from your 800S series sprinklers, read these instructions  
completely prior to installation or service.  
Figure 1  
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Constructing Swing Joints  
1. Construct or provide triple swing joints for each sprinkler as shown in Figure 1. Use PVC or  
ABS pipe nipple for the sprinkler connection.  
Note: On sites where the possibility of heavy equipment rolling over a sprinkler exists, the  
swing joint will flex preventing damage to the lateral or main lines. On a new installation in  
raw ground where the sprinklers are to be initially installed above the finished grade and  
lowered when new turf is established, the swing joint allows sprinkler repositioning without  
changing risers. This is a common and practical procedure which eliminates the problem of  
dirt being accidentally introduced into the lateral lines when a riser is changed.  
2. Flush lines thoroughly prior to installing sprinkler.  
3. Apply PTFE tape on riser threads (not required on ACME threads). Install sprinkler to riser and tighten.  
CAUTION: Use only PTFE tape on riser threads. Use of pipe dope or other types of sealing compounds can cause  
deterioration of sprinkler body threads.  
Connecting Control Wires (Electric Models Only)  
1. Route control wires to sprinklers. Provide extra wire at sprinkler to allow for height adjustment. One common wire and station  
wire is required for each sprinkler. See Wire Sizing Chart, Table 1 for proper application.  
Note: Wire length data provided in Table 1 is the sum of the station and common wire legs. See example in Figure 2.  
Table 1: Wire Sizing Chart  
Total Wire Length Between Controller and Sprinkler  
1 Sprinkler 2 Sprinklers 3 Sprinklers 4 Sprinklers  
Voltage AWG  
mm2  
Voltage Drop Circular Mils  
23  
23  
23  
23  
23  
23  
23  
24  
24  
24  
24  
24  
24  
24  
2.5/2.5  
2.5/4.0  
14/10 2.5/5.5  
4
4
4
4
4
4
4
5
5
5
5
5
5
5
4100  
5315  
7250  
6530  
8465  
11515  
10400  
4100  
5315  
7250  
6530  
8465  
11515  
10400  
3285' 1001 m 1642' 500 m 1095' 334 m 821'  
4259' 1298 m 2129' 649 m 1419' 432 m 1064'  
5809' 1770 m 2904' 885 m 1936' 590 m 1452'  
5232' 1595 m 2616' 797 m 1744' 531 m 1308'  
6783' 2067 m 3391' 1033 m 2261' 689 m 1695'  
14/14  
14/12  
250 m  
324 m  
443 m  
399 m  
517 m  
703 m  
12/12  
12/10  
12/8  
4.0/4.0  
4.0/5.5  
4.0/7.0  
9227'  
2812 m  
4613'  
1406 m 3075'  
937 m  
2306'  
10/10 5.5/5.5  
14/14  
8333' 2540 m 4166' 1270 m 2778' 846 m  
2083' 635 m  
313 m  
4106' 1251 m 2053' 626 m 1369' 417 m 1026'  
2.5/2.5  
14/12 2.5/4.0  
14/10  
1622 m  
1331' 406 m  
5323'  
2662' 811 m 1774' 541 m  
2213 m  
6540' 1993 m 3270'  
2420'  
553 m  
498 m  
646 m  
7261'  
3631' 1106 m  
996 m  
8478' 2584 m 4239' 1292 m 2826' 861 m  
738 m 1815'  
2180' 664 m 1635'  
2119'  
2.5/5.5  
12/12 4.0/4.0  
12/10 4.0/5.5  
11533'  
10416'  
12/8  
10/10 10/10  
3515 m 5766' 1757 m 3844' 1172 m 2883' 879 m  
5208' 3472' 2604'  
4.0/5.5  
3175 m  
1587 m  
1058 m  
790 m  
Figure 2  
2. Attach control wires to solenoid leads using an  
approved waterproof splicing method.  
CAUTION: All wire splices and field  
connections must be waterproofed to prevent  
short circuit to ground and subsequent controller  
damage.  
Station Wire = 1095' (334m)  
Common Wire = 1095' (334m)  
Total Wire Length = 2190' (668m)  
Connecting Hydraulic Control Tubing  
1. Route control tubing from the controller to the  
sprinkler location(s).  
Note: Leave an 18" (45.7 cm) service loop of tubing  
at each sprinkler to facilitate movement of sprinkler  
and service operations. Refer to Table 2 for tubing  
run length and sprinkler elevation information.  
Table 2: Hydraulic Control Systems  
Maximum Distance  
Type of System*  
From Controller  
Elevation Restrictions  
Normally Open (01)  
with 3/16" Control Tubing  
Valve elevation should not exceed  
25' ABOVE controller elevation or  
70' BELOW controller elevation.  
2. Flush tubing thoroughly to remove all air and debris.  
500'  
3. Remove the tube retainer and poly cap from the  
tubing adapter at the base of the sprinkler.  
Normally Open (01)  
with 1/4" Control Tubing  
Valve elevation should not exceed  
25' ABOVE controller elevation or  
70' BELOW controller elevation  
1000'  
4. Slide the tube retainer over the end of the control  
tubing and attach tubing to adapter.  
- All hydraulic connections on Toro valves are 14" insert type.  
- Control line pressure must be equal to or greater than mainline pressure.  
- Control line pressure range is 40 to 150 PSI.  
*
5. Slide tube retainer over adapter area to secure tubing.  
3
 
System Start Up _________________________________________________________  
The following is a recommended procedure that will protect system components during system start-up. The procedure is based on a  
velocity fill rate of less than 2' (.61 m) per second. See Table 3 below.  
Table 3: Recommended System Fill Rate  
Pipe Size  
Flow  
Velocity  
Pipe Size  
Flow  
Velocity  
in.  
1/2  
3/4  
cm  
1.3  
1.9  
2.5  
3.1  
3.8  
5.0  
6.4  
GPM  
2
3
LPM  
7.6  
ft/sec  
m/sec  
0.49  
0.59  
0.46  
0.57  
0.43  
0.55  
0.56  
in.  
3
4
6
8
cm  
7.6  
GPM  
45  
75  
150  
250  
450  
500  
LPM  
170.3  
283.9  
567.8  
946.3  
1703.0  
1893.0  
ft/sec  
m/sec  
0.57  
0.57  
0.53  
0.52  
0.60  
0.47  
1.60  
1.92  
1.50  
1.86  
1.41  
1.80  
1.84  
1.86  
1.87  
1.73  
1.70  
1.97  
1.55  
11.4  
18.9  
37.9  
37.9  
75.7  
113.6  
10.1  
15.2  
20.2  
25.4  
30.5  
1
5
1-1/4  
1-1/2  
2
10  
10  
20  
30  
10  
12  
2-1/2  
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. Use a jockey pump only to fill the system at a velocity fill rate of less than 2' (0.61 m) per second.  
CAUTION: Failure to comply with recommended fill rate will increase line pressure resulting in a water hammer  
effect that could damage sprinklers and piping components. See Warning above.  
2. At all tees and greens use quick coupler keys with quick coupler valves to bleed air from the system lines during the filling  
process. For best results, do not compress air and then relieve it – bleed the air constantly while filling the system.  
3. After water has filled all lines and all air is removed, remove the quick coupler keys.  
Pilot Valve Operation (Electric Models Only) ________________________________________  
The pilot valve controls the operation of the main valve located in the  
base of the sprinkler body. The main valve is operated by the release  
Figure 3  
of water metered through the pilot valve when it is activated either  
100 PSI  
manually at the sprinkler or by the irrigation system controller.  
2
(7.0 kg/cm )  
The sprinkler operation mode is set using a Toro Selector Tool  
(P/N 995-15) inserted through the body flange onto the pilot valve  
D-shaped selector cam. The "AUTO" mode permits automatic  
80 PSI  
(5.6 kg/cm )  
operation from the system controller. The "ON" mode opens the main  
valve for manual operation and "OFF" mode prevents the main valve  
from opening.  
2
The pilot valve regulates the water pressure to the sprinkler nozzle.  
Pressure regulation compensates for large variations within the  
system and maintains a constant pressure for optimum sprinkler  
operation. The pilot valve is factory set to regulate one of four  
pressure levels: 50 psi (3.4 bar), 65 psi (4.5 bar), 80 psi (5.5 bar) or  
100 PSI (6.9 bar).  
65 PSI  
(4.6 kg/cm )  
2
2
50 PSI (3.5 kg/cm )  
Change the pilot valve operating pressure by loosening the thumb  
screw that secures the selector lever. Position the selector lever to  
the desired operating pressure and hand-tighten the nut. See Figure 3.  
4
 
Nozzle Trajectory Adjustment Procedure _______________________________________  
Note: The nozzle trajectory is factory pre-set at 25 degrees.  
1. Insert the multi-purpose tool (P/N 995-83) into the slot provided in the top of the cap. Pull the riser assembly up, then grasp the  
assembly to hold it in the popped-up position.  
2. Remove the cap retaining screw and cap.  
3. Using a 5/8" nut driver (P/N 995-99), turn the nozzle/housing assembly left to select 15° trajectory as shown in Figure 4. Turn the  
nozzle/housing assembly right to select 25° trajectory as shown in Figure 5.  
4. Install the cap making sure the top the nozzle housing is correctly nested in the cap.  
5. Install the cap retaining screw.  
6 Activate the sprinkler to check the spray trajectory.  
Figure 5  
Figure 5  
5
 
Troubleshooting _________________________________________________________  
Pilot Valve  
Possible equipment failures with causes and corrective action are listed below.  
PROBLEM  
POSSIBLE CAUSE – CORRECTIVE ACTION  
SPRINKLER WILL  
NOT TURN ON  
(a) No 24 VAC to coil assembly. (Electric Models)  
– Measure voltage with a Digital Volt Meter (DVM). Check wiring and controller program.  
– Refer to Controller Operating Instructions.  
(b) Selector cam in "OFF" position.  
– Set to "AUTO" position.  
(c) Debris in pilot valve assembly.  
– Disassemble and remove all debris. (See Servicing Pilot Valve page 11.)  
(d) Insufficient pressure in controller supply line and/or sprinkler control tube. (N.C. Models)  
– Check pressure.  
SPRINKLER WILL  
NOT SHUT OFF  
(a) Constant 24 VAC from controller. (Electric Models)  
– Check for voltage using a DVM. If voltage is present, disconnect wire.  
If sprinkler closes, service controller. Refer to Controller Service Manual.  
(b) Selector cam in manual "ON" position.  
– Set to "AUTO" or "OFF" position.  
(c) Debris in pilot valve assembly.  
– Disassemble and remove all debris. (See Servicing Pilot Valve page 11.)  
(d) Constant pressure from controller. (N.C. Models)  
– Check pilot valve at controller for constant flow.  
– Check elevation differential. Valve elevation should not exceed 0' above  
controller elevation or 70' (21.3 m) below controller elevation.  
Sprinkler Assembly  
PROBLEM  
POSSIBLE CAUSE – CORRECTIVE ACTION  
SPRINKLER WON'T ROTATE  
(a) Debris wedged between stator and turbine.  
– Remove obstruction.  
(b) Drive assembly defective.  
– Replace drive assembly.  
(c) Nozzle base assembly defective.  
– Replace nozzle base assembly.  
(a) Dirt in riser assembly.  
HEAD STICKS UP  
– Flush out. (See Flushing Procedure on page 11.)  
(b) Damaged or missing return spring.  
– Replace.  
(c) Damaged riser.  
– Replace.  
(a) Nozzle plugged with debris.  
– Clean or replace nozzle.  
POOR DISTRIBUTION PATTERN  
(b) Nozzle orifice damaged.  
– Replace nozzle.  
(c) Low operating pressure.  
– Determine why system overloaded and correct.  
Main Valve  
PROBLEM  
VALVE WON'T CLOSE  
(Electric )  
POSSIBLE CAUSE – CORRECTIVE ACTION  
(a) Continuous 24 VAC to sprinkler.  
– Check controller for voltage source.  
(b) Leak in pilot valve assembly.  
– Replace pilot valve assembly.  
(c) Plugged supply screen on piston.  
– Clean or replace screen.  
(d) Manual control selector on pilot valve assembly turned to "ON" position.  
– Turn to "AUTO" position.  
(e) Plunger movement restricted.  
– Inspect and clean or replace.  
(f) Valve cylinder misaligned with sprinkler body communication tube.  
– Remove valve assembly and install correctly.  
(g) Foreign object keeping valve from seating.  
– Remove, clean and check valve for damage. Replace if necessary.  
(h) Damaged piston seal or piston assembly.  
– Replace valve assembly.  
6
 
VALVE WON'T CLOSE  
(Hydraulic)  
(a) Leak in control tubing.  
– Isolate and repair.  
(b) Pilot valve leak in controller.  
– Confirm by observing constant dripping from discharge line of controller.  
Refer to Controller Service Manual.  
(c) Valve cylinder misaligned with sprinkler body communication tube.  
– Remove valve assembly and install correctly.  
(d) Foreign object keeping valve from seating.  
– Remove, clean and check valve for damage. Replace if necessary.  
(e) Damaged piston seal or piston assembly.  
– Replace valve assembly.  
VALVE WON'T OPEN  
(Electric)  
(a) Control (field) wires severed.  
– Isolate and repair.  
(b) No power to controller.  
– Establish controller power.  
(c) No power from controller to solenoid.  
– Check for blown fuse and replace.  
(d) Manual control selector on pilot valve assembly turned to "OFF" position.  
– Turn to "AUTO" position.  
(e) Pilot valve solenoid inoperative.  
– Remove and replace.  
(f) Pilot valve plunger movement restricted.  
– Inspect, clean and/or replace.  
(g) No supply from main valve.  
– Debris in control tube, main valve assembly and/or communication passages in  
body. Flush thoroughly.  
VALVE WON'T OPEN  
(Hydraulic)  
(a) Plugged controller discharge line or discharge port in pilot valve.  
– Verify by checking for discharge at discharge line when station is  
activated. If no discharge, refer to Controller Service Manual.  
SPRINKLER WEEPING  
(Slow leak in valve)  
(a) Damaged or blocked valve seat.  
– Remove blockage and, if necessary, replace valve assembly.  
(b) Damaged piston seal or piston assembly.  
– Replace valve assembly.  
(c) Low pressure on supply line .  
– Check for low pressure reason and correct.  
(d) Elevation of normally closed sprinkler exceeds 75' (22.9 m) differential.  
SEVERAL VALVES ON DIFFERENT (a) Control tubing leak which lowers supply pressure to other stations.  
STATIONS FAIL TO CLOSE  
(Hydraulic)  
– Turn controller from station to station until a station is reached where  
only valves on that station stay open. The leak would be in the tubing  
on that station. Isolate and repair.  
(b) Leak in supply line to controller.  
– Verify by checking pressure in all control lines.  
(c) Leak in controller pilot valve.  
– Verify by constant discharge from controller.  
(d) Plugged supply line filter.  
– Replace filter if more than 3 psi (0.21 bar) differential exists.  
7
 
Servicing Procedures ____________________________________________________  
The DT series sprinklers are designed to provide the user trouble-free operation for many years without scheduled maintenance. If it  
becomes necessary to disassemble the sprinkler to correct a malfunction or replace a component, all internal parts of the sprinkler  
can be accessed from the top. Refer to the Troubleshooting Procedure in this manual in the event of a malfunction. Some special  
tools are required for disassembly and/or maintenance of the sprinkler and are available from your Toro dealer.  
Servicing Sprinkler Mechanism  
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 6 for the following procedure:  
Figure 6  
1. Insert hooked end of multi-purpose tool (P/N 995-83)  
into slot provided in top of cap (3). Pull assembly  
upward, grasp and hold in position.  
2. Insert hooked end of multi-purpose tool into slot in  
snap ring (11). Pull snap ring inward toward the  
sprinkler assembly, then upward to remove from the  
snap ring groove in sprinkler body. Pull riser assembly  
out of sprinkler body.  
3. Use a 5/8" nut driver (P/N 995-99) to unscrew main  
nozzle (10).  
4. Remove cap screw (1) and cap (3).  
5. Grasp return spring (14) and riser (16) firmly and hold  
in place while removing nozzle base (4). Turn nozzle  
base assembly counterclockwise to remove.  
6. Carefully release tension from return spring (14).  
7. Remove spring and seal retainer/o-ring assembly  
(12 and 13).  
8. Remove o-ring (13).  
9. Remove rock screen (19) turning it counterclockwise  
with edge of multi-purpose tool or tips of snap ring  
pliers (P/N 995-100).  
10. Remove drive assembly (17) and stator (18) from  
riser assembly by carefully pressing on end of  
threaded shaft.  
11. Using a 5/16" nut driver (P/N 995-105), unscrew  
intermediate nozzle (5 & 6) and inner nozzle (5) and  
plugs (7) from the nozzle base assembly.  
12. Thoroughly clean and inspect all parts and replace  
as necessary. Reassemble in the reverse order.  
Note: During reassembly, ensure snap ring is  
correctly installed and fully seated in snap ring groove  
before operating sprinkler. See WARNING above..  
8
 
Servicing Main Valve  
WARNING  
IF THE VALVE SNAP RING IS DIFFICULT TO REMOVE, RESIDUAL WATER PRESSURE MAY BE  
REMAINING IN THE SYSTEM. TO PREVENT POSSIBLE SERIOUS INJURY DUE TO VALVE BEING  
EJECTED UPWARD UNDER PRESSURE, CONFIRM THE FOLLOWING CONDITIONS EXIST PRIOR TO  
REMOVING THE SNAP RING AND VALVE:  
A. WATER SUPPLY TO SPRINKLER IS SHUT OFF AT SOURCE.  
B. All PRESSURE IS BLED FROM SYSTEM, INCLUDING CONTROL TUBES.  
C. AC POWER IS DISCONNECTED AT SOURCE.  
1. See WARNING above. To remove valve assembly, squeeze  
Figure 7  
Figure 8  
snap ring ears together with snap ring pliers (P/N 995-100) and  
remove snap ring from sprinkler body. See Figure 7.  
2. Use valve removal tool P/N 995-08 for DT34 or 995-09 for DT54  
to remove valve assembly from base of sprinkler body. Valve  
removal tool is inserted into sprinkler body and pushed through  
valve ribs. A slight twist will catch tool under ribs enabling valve  
removal by pulling straight up and out. See Figure 8.  
Note: If valve removal tool is not available, use snap ring pliers  
to grasp rib of valve cylinder assembly and pull up and out of  
sprinkler body.  
3. Reinstall valve assembly using valve insertion tool P/N 995-76  
for DT34 or 995-101 for DT54 as follows:  
• Load snap ring on insertion tool carrier with stepped side  
against carrier as shown in Figure 9. While holding snap ring in  
compressed position, slide retainer clip in to hold snap ring ears  
• Load valve assembly on carrier as shown.  
• Locate position of communication tube in bottom of sprinkler body and orient insertion tool accordingly.  
• Insert tool straight down into sprinkler body aligning bosses on t-handle with holes on sprinkler body flange. When valve  
assembly clears vertical side wall ribs inside body, pull up on snap ring release mechanism (DT54 models only) and press valve  
assembly into position. Snap ring will lock into groove when properly installed. Remove insertion tool and check snap ring to  
confirm that it is fully seated in groove.  
Figure 9  
Snap Ring In  
Retainer Clip  
Snap Ring Release  
Mechanism  
Stepped Side  
of Snap Ring  
Valve Assembly  
Orientation In Carrier  
Valve Assembly  
Pressed Into Position  
Snap Ring  
Released  
9
 
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 10 for the following procedure.  
1. Make sure that the water supply to sprinkler  
Figure 10  
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.  
15  
9
2. Carefully remove turf and soil from the side  
of the sprinkler to expose pilot valve and  
control tubing.  
14  
10  
13  
8
12  
11  
6
3. Remove the two retaining screws from the  
pilot valve housing.  
16  
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.  
1
2
7
5
17  
18  
5. Remove tube retainer and remaining piece  
of control tubing from valve body fitting.  
3
6. Remove the solenoid (1, 2 or 3) by turning it  
counterclockwise.  
4
7. Remove the retaining nut (18) and washer  
(17) from the pressure adjuster (11) and pull  
the pilot valve body assembly out of housing  
(16).  
8. Remove diaphragm assembly (15), piston  
(14), spring (13), traveling adjuster (12),  
pressure adjuster (11) and o-ring (7).  
9. Remove selector shaft assembly (9) and plunger assembly (5). (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 368-0044 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.  
10  
 
Notes:  
11  
 
Notes:  
Form Number 373-0423 Rev. 2  
 

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