760/780 Series Rotary Sprinklers
Contents
1. location s Type of System From Controller Elevation Restrictions NOTE Pin typee 00 Hydraulic 1 Leave an 18 45 7 cm service loop of tubing at each vii ae Control Tubing YOn sprinkler to facilitate movement of sprinkler and service Pin typee 00 Hydraulic operations Refer to Table 2 for tubing run length yin Control Tubing a information Normally Open 01 Valve elevation should not exceed with xs Control Tubing 500 25 ABOVE controller elevation or l 70 BELOW controller elevation 2 Flush tubing thoroughly to remove all air and debris i i Normally Closed 08 Valve elevation should not exceed 3 Remove tube retainer and poly cap from tubing adapter with xs Control Tubing 500 0 ABOVE controller elevation or at base of sprinkler 70 BELOW controller elevation 4 Slide tube retainer over control tubing and attach tubing Normally Open 01 Valve elevation should not exceed to adapter with 4 Control Tubing 1000 25 ABOVE controller elevation or 70 BELOW controller elevation 5 Slide tube retainer over adapter area to secure tubing Normally Closed 08 Valve elevation should not exceed with 4 Control Tubing 1000 0 ABOVE controller elevation or 70 BELOW controller elevation Depends on variables Electric 06 Voltage available None e Wire Size All hydraulic connections on Toro valves are 4 insert type Control line pressure must be equal to or greater than mainli2. TORO Introduction The 760 780 Series Full Circle and Adjustable Part Circle Rotary Sprinklers are designed for irrigation of large turf areas such as golf courses parks recreational fields and school grounds Manufactured from durable 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 Features Adjustable part circle 30 330 and full circle models available Arc adjustment from top of sprinkler m Standard stainless steel riser resists scoring from embedded debris Full 3 7 6 cm pop up clears tall grasses Nozzles color coded by radius and gallonage Caps serve as yardage markers or effluent water indicators Variable stator Four standard pressure regulation settings available to ensure consistently accurate nozzle performance regardless of elevation Specifications 760 Series Radius 55 78 16 8 m 23 8 m Flow Rate m 11 7 41 2 GPM m 44 3 155 9 I mn a 2 7 9 4 m hr Arc Full Circle or Adj Part Circle 30 330 Maximum Pressure m Electric VIH 150 PSI 10 5 kg cm 1034 5 kPa a NO Hyd VIH 100 PSI 7 0 kg cm 689 7 kPa a NC Hyd VIH 150 PSI 10 5 kg cm 1034 5 kPa m Check O Matic 100 PSI 7 0 kg cm 689 7 kPa Body Height 10 25 4 cm Pop Up Height 3 7 6 cm 1 NP
3. Continuous 24 VAC to sprinkler Check controller for voltage source Leak in pilot valve assembly Replace pilot valve assembly Plugged supply screen on piston Clean or replace screen Manual control selector on pilot valve assembly turned to ON position Turn to AUTO position Plunger movement restricted Inspect and clean or replace Valve cylinder misaligned with sprinkler body communication tube Remove valve assembly and install correctly Foreign object keeping valve from seating Remove clean and check valve for damage Replace if necessary Damaged piston seal or piston assembly Replace valve assembly Leak in control tubing Isolate and repair Pilot valve leak in controller Confirm by observing constant dripping from discharge line of controller Refer to Controller Service Manual Valve cylinder misaligned with sprinkler body communication tube Remove valve assembly and install correctly Foreign object keeping valve from seating Remove clean and check valve for damage Replace if necessary Damaged piston seal or piston assembly Replace valve assembly Constant pressure to sprinkler Check controller for water source Elevation differential between sprinkler and controller exceeds tolerance Check elevation differential Valve elevation should not exceed 0 above controller elevation or 70 21 3 m below controller elevation
4. 5 8 22 6 1113 67 22 9 130 2 7 8 23 2 138 2 83 6 0 582 1 18 9 57 9 35 19 8 643 3 9 21 1 82 5 5 0 22 3 99 6 6 0 22 9 114 7 6 9 23 2 134 0 80 23 5 142 7 86 6 5 635 9 19 0 60 0 3 6 20 1 67 4 4 1 21 4 87 1 5 2 22 5 103 9 6 2 23 1 120 2 7 2 23 4 140 3 84 23 7 149 9 9 0 7 0 684 8 19 2 61 7 3 7 20 1 70 4 42 21 4 90 8 5 5 22 6 107 1 6 4 23 2 124 5 7 5 23 5 145 3 87 23 8 155 9 9 4 kPa kilo Pascals Rad meters l mn liters per minute m hr cubic meters per hour EEEE Pressure regulation 780 Series Sprinkler Performance Data NOZZLE PERFORMANCE U S i BASE NOZZLE SET NOZZLE SET NOZZLE SET NOZZLE SET NOZZLE SET NOZZLE SET NOZZLE SET NOZZLE SET PRES 82 83 84 85 86 87 88 89 PSI Rad GPM Rad GPM Rad GPM Rad GPM Rad GPM Rad GPM Rad GPM Rad GPM 50 55 12 3 58 13 2 61 17 2 63 20 8 65 24 4 69 28 8 72 32 2 74 35 7 55 57 12 7 60 13 8 63 18 1 65 21 7 67 25 6 70 30 2 73 33 7 75 37 3 60 58 13 0 62 14 4 65 18 9 66 22 6 69 26 8 72 31 5 74 35 2 76 38 9 65 60 13 4 64 15 0 67 19 8 68 23 6 71 28 1 73 32 9 75 36 8 77 40 6 70 61 13 9 65 15 5 68 20 6 70 24 4 73 29 0 75 34 2 77 38 3 79 42 1 75 63 14 4 67 15 9 70 21 3 72 25 1 76 29 9 78 35 5 79 39 8 80 43 6 80 64 14 9 68 16 4 TI 22 1 74 25 9 78 30 9 80 36 9 81 41 4 82 45 2 85 65 15 4 68 17 0 71 22 7 75 26 8 79 31 8 81 37 9 82 42 4 83 46 4 90 66 15 6 69 175 72 23 3 75 27 7 79 32 7 82 38 9 84 43 4 85 47 7 9
5. 0 53 1 1 4 3 1 10 37 9 1 86 0 57 8 20 2 250 946 3 1 70 0 52 1 1 2 3 8 10 37 9 1 41 0 43 10 25 4 450 1703 0 1 97 0 60 2 5 0 20 75 7 1 80 0 55 12 30 5 500 1893 0 1 55 0 47 2 1 2 6 4 30 113 6 1 84 0 56 Arc Adjustment Procedure The 765 785 sprinkler models have an adjustable watering arc from 30 330 and are set at 180 when shipped from the factory The left side of the arc located at the end of counterclockwise rotation is non adjustable fixed Therefore all arc adjustments whether increasing or decreasing will change the right side of the arc located at the end of clockwise rotation Although the sprinkler arc can be adjusted dry sprinkler shut off the best results are obtained during operation The tools required for this procedure include a small pocket knife and an arc adjustment tool P N 995 82 or a 3 32 x 6 hex wrench MWA RHING DUE TO HIGH OPERATING PRESSURE MEYER STAND OF LEAN DIRECTLY OYER TOP OF SPRINKLER OR COME H CONTACT WITH SPRAY FALURE TO COMPLY WAY RESULT H SERIDUS HARTY 1 Using a small knife blade pry up and remove adjustment plug from center of cap as shown in Figure 2 Figure 2 Figure 2 Using arc adjustment tool P N 995 82 or 3 32 x 6 hex wrench remove set screw from center of threaded shaft as shown in Figure 3 3 Operate sprinkler See WARNING above NOTE During this procedure water will discharge continuously from threaded shaft 4 To check curre
6. 5 66 16 0 69 18 1 72 23 9 76 28 5 80 33 6 83 39 9 85 44 4 86 48 9 100 67 16 3 69 18 6 72 24 5 76 29 4 80 34 5 84 40 9 86 45 4 87 50 1 Rad Feet GPM Gallons Per Minute m Pressure Regulation Models NOZZLE PERFORMANCE METRIC BASE NOZZLE SET NOZZLE SET NOZZLE SET NOZZLE SET NOZZLE SET NOZZLE SET NOZZLE SET NOZZLE SET PRESSURE 82 83 84 85 86 87 88 89 kg cm kPa Rad I m m hr Rad I m m hr Rad I m m hr Rad I m m hr Rad I m m hr Rad I m m hr Rad I m m hr Rad Im m hr 3 5 342 4 16 9 46 6 2 7 17 7 50 0 3 0 18 6 65 1 3 9 19 2 78 7 4 7 19 8 92 4 55 21 1 109 0 6 5 22 0 121 9 7 3 22 6 135 1 8 1 4 0 386 4 17 5 48 5 2 8 18 4 52 8 31 19 3 69 3 41 19 9 83 0 5 0 20 5 98 0 59 21 5 115 6 7 0 22 7 129 0 7 8 23 0 142 8 8 6 45 440 2 18 0 50 5 3 0 19 2 56 2 3 4 20 1 73 9 44 20 4 88 3 5 3 21 5 1047 6 3 22 1 123 1 7 4 23 0 137 5 8 3 23 5 151 9 9 1 4 6 445 1 18 3 50 7 3 0 19 5 56 8 3 4 20 4 74 9 45 20 7 89 3 5 4 217 1064 64 22 3 124 5 7 5 22 9 139 3 8 4 23 5 153 7 9 2 5 0 489 2 18 7 53 0 3 1 19 9 59 3 3 5 20 8 78 8 4 7 21 5 93 3 56 22 4 110 9 6 7 23 0 130 7 7 9 23 6 146 4 88 24 2 160 9 9 7 5 5 533 2 19 4 55 4 3 3 20 6 61 4 37 21 6 82 2 49 22 2 96 9 58 23 5 115 4 6 9 241 137 0 83 24 3 153 5 9 2 24 6 168 1 10 1 5 6 547 8 19 5 56 4 3 3 20
7. 69 21 1 72 25 6 74 29 4 75 34 4 76 36 5 85 62 15 3 65 17 0 69 21 8 73 26 3 75 30 3 76 35 4 77 37 7 90 62 15 6 66 17 5 70 22 6 73 27 0 75 31 2 76 36 4 77 38 9 95 63 16 0 66 18 1 70 23 3 74 27 6 76 32 0 77 37 4 78 40 0 100 63 16 3 66 18 6 70 24 0 74 28 3 76 32 9 77 38 4 78 41 2 Rad feet GPM gallons per minute EEE Pressure regulation NOZZLE PERFORMANCE METRIC BASE NOZZLE SET NOZZLE SET NOZZLE SET NOZZLE SET NOZZLE SET NOZZLE SET NOZZLE SET PRESSURE 62 63 64 65 66 67 68 kg cm kPa Rad I mn m hr Rad I mn m hr Rad mn m hr Rad i mn m hr Rad I mn m hr Rad I mn m hr Rad I mn m hr 3 5 342 4 16 8 44 3 27 17 7 50 0 3 0 18 6 63 6 3 8 19 2 76 5 4 6 19 8 87 1 52 20 4 101 4 61 20 7 108 3 6 5 4 0 386 4 17 2 47 1 2 8 18 4 52 5 31 19 3 67 0 4 0 19 9 81 1 4 9 20 5 92 7 5 6 21 2 107 7 6 5 215 1153 6 9 4 5 440 2 17 6 49 9 3 0 19 1 55 8 3 3 19 7 70 8 4 2 20 4 86 3 5 2 21 4 99 3 6 0 21 7 115 1 6 9 22 0 123 3 7 4 4 6 445 1 17 7 50 7 3 0 19 5 56 0 34 20 1 712 43 20 7 86 4 5 3 21 7 100 7 6 0 22 0 116 2 7 0 22311249 7 5 5 0 4892 18 1 53 1 32 19 6 585 3 5 20 5 75 0 45 21 2 91 4 5 5 22 1 1052 63 22 4 122 0 7 3 22 7 130 8 7 9 5 5 533 2 18 4 55 5 34 19 8 61 4 3 7 20 9 78 4 47 21 9 95 6 5 7 22 5 1096 6 6 22 8 127 8 7 6 23 1 136 3 82 5 6 547 8 18 6 56 4 3 4 198 62 1 3 7 21 1 79 9 48 22 0 96 9
8. 7 62 1 37 21 7 83 6 5 0 22 6 98 0 5 9 238 117 0 7 0 24 4 139 7 84 24 7 156 7 9 4 25 0 171 1 10 3 6 0 582 1 19 8 58 3 3 4 20 7 64 3 3 9 21 7 85 9 5 2 229 101 4 61 24 1 120 4 7 2 24 7 143 5 86 25 0 160 5 9 6 25 3 175 6 10 5 6 5 635 9 20 3 59 9 3 6 21 1 67 4 41 22 0 898 54 231 106 7 64 244 126 0 7 5 253 149 8 9 0 25 8 167 2 10 1 26 1 183 6 11 0 7 0 684 8 20 4 61 7 3 6 21 1 70 4 4 2 22 0 92 7 56 23 2 111 3 6 7 24 4 130 6 7 8 25 6 154 8 9 3 26 2 171 8 10 3 26 5 189 6 11 4 kg cm bars kPa kilo Pascals Rad meters l m liters per minute m hr cubic meters per hour EEEE Pressure Regulation Models Nozzle Color Coding Guide Sprinkler Spacing Precipitation Rate Formulas Nozzle Main Inner Restrictor The Toro Company does not 1 Square spaced sprinklers in pattern recommend designing for 82 Yellow Yellow Black zero 0 mph wind conditions GPM of full circle x 96 3 Design in consideration of the ae 83 Blue Blue Black worst wind conditions Spacing 84 Brown Brown White 1 Square Spacing No wind 55 ofdiameter a Triangular spaced sprinklers in pattern 85 Orange Orange White 9 p P p 4 mph wind 50 of diameter a 86 Green Green White 8 mph wind 45 of diameter GPM of full circle x 96 3 w Spacing 0 866 A ZAN 87 Gray Gray White 1 Triangular
9. IH 150 PSI 10 5 kg cm 1034 5 kPa m Check O Matic 100 PSI 7 0 kg cm 689 7 kPa Body Height 11 27 9 cm Pop Up Height 3 7 6 cm 1 5 NPT or BSP Female Thread Inlet Solenoid m 24 VAC 50 60 Hz m Inrush Current 50 Hz 0 47 Amps 11 3 VA 60 Hz 0 40 Amps 9 6 VA m Holding Current 50 Hz 0 32 Amps 7 7 VA 60 Hz 0 30 Amps 7 2 VA Manual Control On Off Auto Check O Matic model checks up to 37 11 3 m of elevation Color Coded Nozzles See chart on page 3 760 Series Sprinkler Performance Data NOZZLE PERFORMANCE U S BASE NOZZLE SET NOZZLE SET NOZZLE SET NOZZLE SET NOZZLE SET NOZZLE SET NOZZLE SET PRES 62 63 64 65 66 67 68 PSI Rad GPM Rad GPM Rad GPM Rad GPM Rad GPM Rad GPM Rad GPM 50 55 11 7 58 13 2 61 16 8 63 20 2 65 23 0 67 26 8 68 28 6 55 56 12 3 60 13 7 63 17 5 65 21 2 67 24 2 69 28 1 70 30 1 60 57 12 7 62 14 3 64 18 1 66 22 1 69 25 4 70 29 4 7i 31 5 65 58 13 4 64 14 8 66 18 8 68 23 1 71 26 6 72 30 7 73 33 0 70 59 13 9 64 15 3 67 19 6 69 23 9 72 27 5 73 31 9 74 34 2 75 60 14 4 65 15 9 68 20 3 71 24 8 73 28 4 74 33 1 75 35 3 80 61 14 9 65 16 4
10. Restriction in controller discharge line Inspect and clean Valve cylinder misaligned with sprinkler body communication tube Remove valve assembly and install correctly Foreign object keeping valve from seating Remove clean and check valve for damage Replace if necessary Damaged piston seal or piston assembly Replace valve assembly 7 PROBLEM VALVE WON T OPEN Electric 7XX X6 XXX VALVE WON T OPEN Hyd Normally Open 7XX X1 XX VALVE WON T OPEN Hyd Normally Closed 7XX X8 XXX SPRINKLER WEEPING Slow leak in valve SEVERAL VALVES ON DIFFERENT STATIONS FAIL TO CLOSE Hyd Normally Open 7XX X1 XX System Troubleshooting Sprinklers continue POSSIBLE CAUSE CORRECTIVE ACTION Control field wires severed Isolate and repair No power to controller Establish controller power No power from controller to solenoid Check for blown fuse and replace Manual control selector on pilot valve assembly turned to OFF position Turn to AUTO position Pilot valve solenoid inoperative Remove and replace Pilot valve plunger movement restricted Inspect clean and or replace No supply from main valve Debris in control tube main valve assembly and or communication passages in body Flush thoroughly Plugged controller discharge line or discharge port in pilot valve Verify by checking for discharge at discharge line when station is acti
11. Spacing Nowind 60 of diameter 88 Black Black White 4mphwind 55 of diameter 8mphwind 50 ofdiameter Area and flow 89 Red Red White 1 Single Row Spacing Total GPM of zone x 96 3 90 No wind 50 of diameter Total irrigated 4mphwind 50 of diameter square feet of zone Only one restrictor required per two inner nozzles 8mphwind 45 of diameter Refer to Toro Illustrated Parts Breakout Book Form No 368 0044 1 Single row GPM of full circle x 96 3 Spacing Scallop For additional information refer to Toro Form No 490 1737 Installation Procedure To assure maximum performance from your 760 780 Series Rotary Sprinklers read these instructions completely prior to installation or service Construct Swing Joints 1 Construct or provide triple swing joints for each sprinkler as shown in Figure 1 Use PVC or ABS pipe nipple for 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 pr
12. T SHUT OFF 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 System Troubleshooting Sprinklers PROBLEM 1 SPRINKLER WON T ROTATE 2 HEAD STICKS UP 3 POOR DISTRIBUTION PATTERN 4 VALVE WON T CLOSE Electric 7XX X6 XXX VALVE WON T CLOSE Hyd Normally Open 7XX X1 XX VALVE WON T CLOSE Hyd Normally Closed 7XX X8 XXX POSSIBLE CAUSE CORRECTIVE ACTION Debris wedged between stator and turbine Remove obstruction Drive assembly defective Replace drive assembly Nozzle base assembly defective Replace nozzle base assembly Dirt in riser assembly Flush out See Flushing Procedure on page 11 Damaged or missing return spring Replace Damaged riser Replace Nozzle plugged with debris Clean or replace nozzle Nozzle orifice damaged Replace nozzle Low operating pressure Determine why system overloaded and correct
13. T or BSP Female Thread Inlet Solenoid m 24 VAC 50 60 Hz m Inrush Current 50 Hz 0 47 Amps 11 3 VA 60 Hz 0 40 Amps 9 6 VA m Holding Current 50 Hz 0 32 Amps 7 7 VA 60 Hz 0 30 Amps 7 2 VA Manual Control On Off Auto Check O Matic model checks up to 37 11 3 m of elevation Color Coded Nozzles See chart on page 3 760 780 Series Rotary Sprinklers Installation 8 Service Instructions high strength engineering plastic and stainless steel components these sprinklers incorporate many innovative and 760 Electric Valve In Head 780 Electric Valve In Head Four body styles activation types available to fit every application Electric VIH Normally Open Hydraulic VIH Normally Closed Hydraulic VIH and Check O Matic Manual control at the sprinkler On Off Auto Electric and Normally Closed Bowl vented discharge atmospheric minimizes the differential pressure required for regulation and ensures positive valve closure Electric and Normally Closed All internal components serviceable from the top of the sprinkler Large selection of color coded nozzles available m Durable plastic and stainless steel construction 780 Series Radius 55 87 16 8 m 26 5 m Flow Rate m 12 3 50 1 GPM m 46 6 189 6 I mn a 2 8 11 4 m hr Arc Full Circle or Adj Part Circle 30 330 Maximum Pressure m Electric VIH 150 PSI 10 5 kg cm 1034 5 kPa a NO Hyd VIH 100 PSI 7 0 kg cm 689 7 kPa a NC Hyd V
14. g groove in body NOTE During reassembly ensure snap ring is correctly installed and fully seated in snap ring groove Pull sprinkler assembly out of body While pushing seal retainer assembly downward to slightly compress return spring unscrew and remove nozzle base assembly from shaft of drive assembly Carefully release tension from return spring Remove seal retainer assembly and return spring from riser assembly Remove O ring from seal retainer assembly Remove O ring from shaft of drive assembly or from O ring counterbore inside of nozzle assembly Using tips of needle nose pliers inserted into screen remove screen by turning it counterclockwise while holding plastic base of riser assembly Remove variable stator and stator support from riser assembly NOTE Stator support is keyed to riser assembly During reassembly position stator support keyways over alignment tabs of riser assembly Refer to Figure 6 for location of alignment tabs Pressing only on ribbed area of drive assembly push drive assembly out of riser assembly as shown in Figure 5 Figure 5 CAUTION When removing or installing drive assembly DO NOT press or pull on threaded shaft or attempt to pull drive assembly out of riser assembly Push on ribbed areas only Failure to comply may cause separation of drive assembly components NOTE Drive assembly is keyed to riser assembly During reassembly position extra rib of drive assembly to the right of e
15. ior to installing sprinkler 3 Apply Teflon tape on riser threads Install sprinkler to riser and tighten CAUTION Use only Teflon tape on riser threads Use of pipe dope or other types of sealing compounds can cause deterioration of sprinkler body threads Figure 1 Triple Swing Joints Connecting Electric Control Wires 1 Route control wires to sprinkler location s Provide enough extra wire Table 1 Wire Sizing Chart at sprinkler to allow for movement of sprinkler without straining wire Maximum allowable length in feet from controller to electric VIH connections One common wire and station wire is required for each sprinklers sprinkler See Wire Sizing Chart Table 1 for proper application OUTPUT 2 Attach control wires to solenoid leads using an approved waterproof dontrcrier SIZE OFE VALVES splicing method TRANSFORMER CAUTION All wires must be waterproofed to prevent short circuit to ground and subsequent controller damage CONTROL COMMON 23 VAC 23 VAC 23 VAC 23 VAC 23 VAC 23 VAC 23 VAC 24 VAC 24 VAC 24 VAC 24 VAC 24 VAC 24 VAC 24 VAC Chart based on the following Transformer 115 230 VAC 24 VAC 45 VA Coil Assy 24 VAC 60 Hz Holding 30 Amps In Rush 40 Amps Connecting Hydraulic Control Tubing TabW2 Control Systems 1 Route control tubing from controller to sprinkler Maximum Distance
16. ither alignment tab of riser assembly as shown in Figure 6 Using e nut driver P N 995 81 unscrew main nozzle from nozzle base assembly Alignment Tab Extra Rib Of Drive Assy Using Ze nut driver P N 995 79 unscrew two inner nozzles from nozzle base assembly Remove restrictor from one inner nozzle Thoroughly clean and inspect all parts replace as necessary Reassemble in reverse order Alignment Tab Valve Removal and Replacement Refer to Toro Illustrated Parts Breakout Book Form No 368 0044 for parts identification WARNING POSITIYELY SHUT OFF WATER SUPPLY AT SOURCE PRIOR TO DEASSEWA KG SPRINKLER BLEEG ALL PRESSURE FROM SYSTEM CLUDING CONTROL TUBES FA LURE TO DEPRESSUR EE SYSTEM PRIOR TO SAA PRAG REMOYAL COULD CAUSE YALYE MECHAN GH TO EJECT FR OM SPRINKLER BODY UNDER PRESSURE RESULT ING IN POSSBLE SERIALS HARY TO PERSONNEL 1 To remove valve assembly squeeze ears of snap ring together with snap ring pliers P N 995 07 and remove snap ring from sprinkler body See Figure 6 CAUTION If snap ring is difficult to remove there may be residual water pressure in the system Recheck the water supply to ensure it is turned off and all pressure has been totally eliminated before removing the snap ring and valve 2 Use valve removal tool P N 995 08 1 models or 995 09 1 5 to remove valve assembly from base of sprinkler body Valve Removal Tool is inserted into sprin
17. kler body and pushed through valve ribs to the underside of valve A slight twist will lock tool to valve enabling removal by pulling straight up and out See Figure 7 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 To reinstall valve assembly with snap ring and to prevent damage to the communication tube in sprinkler body use valve insertion tool P N 995 76 1 or 995 10 1 5 Valve insertion tool will automatically line up valve assembly with sprinkler body communication tube and correctly seat the snap ring See Figure 8 NOTE It is possible to install the snap ring backwards upside down See inset in Figure 8 to insure that snap ring is placed on the insertion tool in the correct manner Figure 6 Figure 7 Figure 8 Using Snap Ring Pliers to Using Valve Removal Tool to Using Valve Insertion Tool to Remove Snap Ring Remove Valve Assembly Install Valve Assembly with Snap Ring 780 Series Shown 780 Series Shown 780 Series Shown Flushing Sprinkler Heads WARNING DUE TO HIGH OPERATING PRESSURE MEYER STAND OF LEAN DIRECTLY OTER EPR HEKLER OF COME H CONTACTWITH SPRAY WHEN ACTUATING SPRINKLER AHU ALLY OR AUTOMATICALLY PRIOR TO ACTUATION OF SPRINKLER USE A SLOT HEAD SCREWORIYER TO LET CAP TO OBSERYE DIREC TION OF NOZZLE FAURE TO COM PLY RAY RESULT SERS HARTY With sprinkler operating careful
18. ly step down on center of cap several times Water will flow around riser and flush out debris 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 Servicing Pilot Valve Refer to Toro Illustrated Parts Breakout Book Form No 368 0044 for parts identification 1 A 9 SMP ONO Assure water supply to sprinkler is positively shut off and any residual pressure has been bled f sprinkler is pressurized main valve will open when pilot valve is disconnected from control tube Carefully remove turf and soil from side of sprinkler to expose pilot valve and control tubing Remove two retaining screws from housing Pull pilot valve assembly away from sprinkler body and cut control tubing just below tube retainer Unless pilot valve has been previously removed control tubing length will be sufficient for re connection Remove tube retainer and remaining piece of control tubing from valve body fitting Remove solenoid assembly or NC pilot valve adapter by turning it counterclockwise Pull pilot valve body assembly out of housing Remove diaphragm assembly piston and spring Remove selector and plunger assembly Selector retains plunger in body Thoroughly clean and inspect all parts Replace damaged parts as necessar
19. ne pressure Control line pressure range is 40 to 150 PSI Minimum solenoid voltage required for reliable electric VIH operation is 19 5 VAC NOTE Maximum of one 1 valve pr station on pin type systems System Start Up The following is a recommended procedure that will protect system components during system start up The procedure is based ona velocity fill rate of less than 2 61 m per second See Table 3 below WA RHIHG A TO PREVENT PERSONAL INJURY DO NOT STAND DIRECTLY OVER ANY COMMERCIAL OR LARGE TURF SPRINKLER WHEN FILLING SYSTEM OR WHEN ACTIVATING MANUALLY AT THE SPRINKLER 1 Use jockey pump only to fill system at velocity fill rate of less than 2 0 6 m per second 2 Use quick coupler keys at all tees and greens with quick coupler valves to bleed air from system lines during filling process Do not compress air and then relieve bleed air while filling system 3 After water has filled all lines and all air is removed remove quick coupler keys CAUTION Failure to comply with recommended fill rate will increase line pressure resulting in a water hammer effect that could damage sprinklers Table 3 Recommended System Fill Rate Pipe Size Flow Velocity Pipe Size Flow Velocity in cm GPM LPM ft sec m sec in cm GPM LPM ft sec m sec 1 2 1 3 2 7 6 1 60 0 49 3 7 6 45 170 3 1 86 0 57 3 4 1 9 3 11 4 1 92 0 59 4 10 1 75 283 9 1 87 0 57 1 2 5 5 18 9 1 50 0 46 6 15 2 150 567 8 1 73
20. nt arc setting rotate cap by hand in direction of current travel to end of arc Immediately rotate cap in reverse direction to opposite end of arc i 1 AN jiY 5 Rotate cap to left side of arc Align spray with left watering border by turning sprinkler body on its pipe fitting NOTE Aligning arc with left border may require removing and turning sprinkler kb assembly in body See Service Procedures p 9 for disassembly instructions k Decrease 6 Insert hex wrench into threaded shaft Turn wrench slowly counterclockwise to ki SE pd decrease or clockwise to increase arc as shown in Figure 4 NOTE Each click equals 1 of arc change One complete revolution of the hex wrench results in a 75 change Figure 4 7 Repeat steps 4 and 6 as necessary making small adjustments until exact arc is set 8 Install set screw and adjustment plug Pilot Valve Operation Models 7XX X6 XXX and 7XX X8 XXX Only The main function of the pilot valve is to control the operation of the main valve located in the base of the sprinkler body The main valve is operated by the release of water metered through the pilot valve when it is activated either manually at the sprinkler or by the irrigation system controller Another important function of the pilot valve is to regulate the water pressure to the sprinkler nozzle Pressure regulation compensates for large variations within the system and maintains a constant press
21. ocedures Introduction The 760 780 series sprinklers are designed to provide the user trouble free operation for many years without scheduled maintenance Should it become necessary to disassemble the sprinkler to correct a malfunction or replace a component all internal parts of the sprinkler are accessible 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 WARNING TO PREYENT POSSIBLE HARY DURING SPRINKLER SERYE HG PROCEDURES COH FEM THE FOLLOW NG CONDITIONS EXET PRIOR TO STAR TING A WATER SUPPLY TO SPRINKLER E SHUT OFF ATSOURCE B SYSTEM PRESSURE 6 BLED FROM SYSTEM KMOLUCG HG CONTROL TUBES C AC POWER E DISCONNECTED AT SOURCE Servicing Sprinkler Mechanism Refer to Toro Illustrated Parts Breakout Book Form No 368 0044 for parts identification 1 2 af o ON 10 11 12 13 14 Using a small screwdriver or pocket knife carefully pry up and remove adjustment plug from center of cap Using nut driver P N 995 80 unscrew jam nut and remove cap NOTE Cap is keyed to nozzle base assembly During reassembly position tab on bottom of cap with notch in top of nozzle base Insert hooked end of snap ring removal tool P N 996 06 into slot in snap ring Pull snap ring inward toward sprinkler assembly then upward to remove from snap rin
22. ure for optimum sprinkler operation The pilot valve is factory set to regulate one of four pressure levels 50 psi 3 5 kg cm 65 psi 4 6 kg cm 80 psi 6 0 kg cm or 100 PSI 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 operation from the system controller The ON mode opens the main valve for manual operation and OFF mode prevents the main valve from opening MWA RHING DUE TO HIGH OPERATING PRESSURE HETER STAND OR LEAN DIRECTLY OYER TOP OF SPRINKLER OR COME H CONTACT WITH SPRAY FALURE TO COMPLY MAY RESULT H SER DUS HARTY System Troubleshooting Pilot Valve Possible equipment failures with causes and corrective action are listed below PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION 1 SPRINKLER WILL a No 24 VAC to coil assembly Electric Models NOT TURN ON 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 2 SPRINKLER WILL a Constant 24 VAC from controller Electric Models NO
23. vated If no discharge refer to Controller Service Manual Insufficient pressure in controller supply line and or sprinkler control tube Check pressure Pilot valve hydraulic adapter inoperative Remove and replace Manual control selector on pilot valve assembly turned to OFF position Turn to AUTO position Pilot valve plunger movement restricted Inspect clean and or replace No supply from main valve Debris in control tube main valve assembly and or communication passages in body Flush thoroughly Damaged or blocked valve seat Remove blockage and if necessary replace valve assembly Damaged piston seal or piston assembly Replace valve assembly Low pressure on supply line on hydraulic NO sprinklers Check for low pressure reason and correct Elevation of normally closed sprinkler exceeds 75 22 9 m differential Control tubing leak which lowers supply pressure to other stations 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 Leak in supply line to controller Verify by checking pressure in all control lines Leak in controller pilot valve Verify by constant discharge on controller Refer to Controller Service Manual Plugged supply line filter Replace filter if more than 3 PSI 0 21 kg cm differential exists Servicing Pr
24. y and reassemble in reverse order PRINTING DATE MAY 1997 REV D TORO 1997 THE TORO COMPANY Irrigation Division An ISO 9001 Certified Facility PO Box 489 Riverside CA 92502 Printed in U S A FORM NO 368 0055
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