750 Series Rotary Sprinkler
Contents
1. TORO Introduction 750 Series Rotary Sprinkler INSTALLATION amp SERVICE INSTRUCTIONS The 754 Full Circle Rotary Sprinkler is designed for irrigation of large turf areas such as golf courses parks recreational fields and school grounds Manufactured from durable high strength engineering plastic and stainless steel components the 754 sprinkler incorporates many innovative and time proven features for lasting maintenance free operation Some of these features are listed below Specifications Radius 56 ft 100 ft 17 1 m 30 4 m Flow Rate a 13 0 60 1 GPM 49 2 227 5 I mn a 3 0 13 7 m hr Arc Full Circle Maximum Pressure a 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 a Check O Matic 100 PSI 7 0 kg cm 689 7 kPa Body Height 11 in 27 9 cm Pop Up Height 2 75 in 6 9 cm Pop Up to Nozzle 2 in 5 1 cm 1 5 in NPT BSP or ACME Female Thread Inlet Solenoid a 24 VAC 50 60 Hz a Inrush Current 50 Hz 0 47 Amps 11 3 VA 60 Hz 0 40 Amps 9 6 VA a 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 ft 11 3 m of elevation Color Coded Nozzles See chart on page 2 750 Electric Features 750 Normally Open Valve In Head Full 3 pop up to clear taller grasses Nozzles color code2. Set to AUTO or OFF position c Debris in pilot valve assembly Disassemble and remove all debris See Servicing Pilot Valve page 10 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 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 10 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 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 Solenoid plunger movement restricted Inspect and clean or replace Valve cylinder misaligned with sprinkler body communication tube Remove valve assembly and install correctly Foreign object
3. 31 5 73 33 6 76 38 9 41 6 60 57 4 0 62 18 3 68 21 8 69 27 7 71 33 0 77 34 a 3 43 1 65 58 14 5 63 19 1 69 22 8 70 8 9 4 6 8 8 8 AA 70 59 15 0 65 19 8 72 23 6 73 29 9 75 36 0 81 37 3 T 7 89 46 4 75 59 15 6 66 20 4 72 24 5 73 30 9 75 37 4 83 38 8 45 5 90 48 3 80 60 16 1 68 pasi 74 25 3 B 32 0 77 38 9 84 40 3 47 4 92 50 2 85 62 7A 69 22 2 75 26 8 76 33 4 78 39 9 86 41 7 88 50 2 94 52 7 90 63 18 7 70 23 4 76 28 4 78 34 8 80 41 0 87 1 53 0 96 55 2 95 65 19 9 71 24 5 76 29 9 79 36 2 81 42 0 89 91 55 7 98 57 6 100 66 21 2 72 25 6 77 31 4 80 37 6 82 43 0 90 m z 58 6 100 60 1 Rad feet GPM gallons per minute Pressure regulation Nozzles not recommended at this pressure NOZZLE PERFORMANCE METRIC kPa kilo Pascals Rad meters 1 mn liters per minute m hr cubic meters per hour Pressure regulation E Nozzles not recommended at this pressure Sprinkler Spacing Precipitation Rate Formulas Nozzle Color Coding Guide 1 The Toro Company does not Nozzle Short Long Long 1 Square spaced sprinklers in pattern recommend designing for Set Main Main Inner zero 0 mph wind conditions 52 Orange Red GPM of full circle x 96 3 Design in consideration of the Spacing worst wind conditions 53 Brown Red 1 Square Spacing 54 Blue Red 1
4. 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 activated If no discharge refer to Controller Service Manual 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 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 cn differential exists Servicing Procedures Introduction The 754 sprinkler is 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 t
5. Triangular spaced sprinklers in pattern fr Pa gt No wind 55 of diameter 55 Green Black 4 mph wind 50 of diameter GPM of full circle x 96 3 CY 8 mph wind 45 of diameter 56 Red Black Spacing 0 866 1 Triangular Spacing of Gray Black No wind 60 of diameter 58 Beige Green 1 Area and flow 4 mph wind 55 of diameter 8 mph wind 50 of diameter 59 Black Green Total GPM of zone x 96 3 Total irrigated 1 Single Row Spacing square feet of zone No wind 50 of diameter 4 mph wind 50 of diameter 8 mph wind 45 of diameter 1 Single row GPM of full circle x 96 3 Spacing Scallop For additional information refer to Toro Form No 490 1737 Installation Procedure CAUTION Golf sprinklers are intended for installation at grade with full support of the body and piping system from the surrounding earth Failure to provide full support may result in premature failure of the body and or connecting fittings Figure 1 Triple Swing Joints wy NPT amp BSP models only To assure maximum performance from your 754 Series Rotary Sprinklers read these instructions completely prior to installation or service 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 dama
6. is fully seated Avoid contact with nozzle orifice as sprinkler coverage can be greatly impaired if orifice is damaged or altered in any way Using Multi Purpose Tool P N 995 83 remove Snap Ring from groove in body Thread Drive Assembly Extraction Tool 995 78 onto drive assembly output shaft and pull sprinkler assembly out of body FLAT SPOT DOWN while holding base of riser assembly Remove Variable Stator Remove Drive Assembly by pushing against end of threaded output shaft Inspect Stator Housing for nicks and burrs This part can be difficult to remove if sprinkler has been in operation for some time and should be left in place if it appears undamaged lf replacement is necessary grasp housing with pliers and pull from riser housing Thoroughly clean and inspect all parts Replace damaged parts as necessary and reassemble in reverse order Valve Removal and Replacement Refer to Toro Illustrated Parts Breakout Book Form No 368 0044 for parts identification WARHIHG POSTTMELY SHUT OFF WATER SUPPLY AT SOURCE PRIOR TO DBASSEMBLANG SPR HNHKLER BLEED ALL PRESSURE FROM SYSTEM CLUDING CONTROL TUBES F LURE TO DEPRESSUR FE SYSTEM PRIOR TO SMA PRING REMOTAL COULD CAUSE YALYE MECHAN GM TO EJECT FROM SPRINKLER BODY UNDER PRESSURE RESULT ING H POSSIBLE SERIALS AWRY 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
7. 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 System Troubleshooting Sprinklers continued PROBLEM 5 VALVE WON T OPEN Electric 7XX X6 XXX VALVE WON T OPEN Hyd Normally Open 7XX X1 XX 6 SPRINKLER WEEPING Slow leak in valve 7 SEVERAL VALVES ON DIFFERENT STATIONS FAIL TO CLOSE Hyd Normally Open 7XX X1 XX 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 Solenoid plunger movement restricted Inspect clean and or replace No supply from main valve
8. RESSURE MEYER STAND OR LEAN DIRECTLY OTER SPR NKLER OF COME CONTACT HITH SPRAY PHEN ACTUA THG SPRINKLER WAHU ALLY OF AUTOMATICALLY PRIOR TO ACTUATION OF SPRINKLER USE A SLOT HEAD SCREADRIYER TO LFT CAP TO OBSERYE DIREC TION OF NOZ2LE FALURE TO COM PLY RAY RESULT H SERS HARTY With sprinkler operating carefully 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 Pw SOMNDD 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
9. RMER CONTROL COMMON proper application 23 VAC 14 14 f l 23 VAC 14 12 2 Attach control wires to solenoid leads using an approved 23 VAG 14 10 waterproof splicing method 23 VAC 12 12 23 VAC 12 10 CAUTION 23 VAC 12 All wires must be waterproofed to prevent short circuit to ground and subsequent controller damage NOTE Minimum solenoid voltage required for reliable electric VIH operation is 20 VAC Chart based on the following Transformer 115 230 VAC 24 VAC 45 VA Coil Assy 24 VAC 60 Hz Holding 30 Amps 3 In Rush 40 Amps Connecting Hydraulic Control Tubing Table 2 Control Systems 1 Route control tubing from controller to sprinkler Maximum Distance location s Type of System From Controller Elevation Restrictions Pin typee 00 Hydraulic Note Leave an 18 inch 45 7 cm service loop with c Control Tubing 100 of tubing at each sprinkler to facilitate Pin typer 00 Hydraulic movement of sprinkler and service operations with 4 Control Tubing 200 Refer to Table 2 for tubing run length information Normally Open 01 Weis cclevatiGnchouldtorektoed P a with xs Control Tubing 500 25 ABOVE controller elevation or 2 Flush tubing thoroughly to remove all air and 70 BELOW controller elevation ris debris Normally Closed 08 Valve elevation should not exceed A with x Control Tubing 500 0 ABOVE controller elevation or 3 Remove tube
10. 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 necessary and reassemble in reverse order PRINTING DATE AUGUST 1997 REV C 1997 THE TORO COMPANY Irrigation Division An ISO 9001 Certified Facility P O Box 489 Riverside California 92502 Printed in U S A FORM NO 368 0054
11. body See Figure 2 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 09 to remove valve assembly from base of sprinkler body Valve Removal Tool is inserted into sprinkler 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 3 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 10 Valve insertion tool will automatically line up valve assembly with sprinkler body communication tube and correctly seat the snap ring See Figure 4 NOTE It is possible to install the snap ring backwards upside down See inset in Figure 4 to insure that snap ring is placed on the insertion tool in the correct manner Figure 2 Figure 3 Figure 4 Using Snap Ring Pliers to Using Valve Removal Tool to Using Valve Insertion Tool to Install Valve Remove Snap Ring Remove Valve Assembly Assembly with Snap Ring Flushing Sprinkler Heads WARHKING DUE TO HIGH OPERATING P
12. d by radius and gallonage Caps serve as yardage markers or effluent water indicators Variable stator Four standard pressure regulation settings available to ensure ocnsistently accurate nozzle performance regardless of elevation 1 50 PSI 65 PSI 80 PSI and 100 PSI electric Four body styles activation types to fit every application Electric VIH Normally Open Hydraulic VIH and Check O Matic Manual control at the sprinkler On Off Auto electric Bowl vented discharge atmospheric minimizes the differential pressure required for regulation and ensures positive valve closure electric Time proven planetary gear drive design All internal components serviceable from the top of the sprinkler Large selection of color coded nozzles available Durable engineering plastic and stainless steel construction Effluent indicators available t Marker Part No 89 4719 1 Yardage marker Part No 89 4736 750 Check O Matic 750 Series Sprinkler Nozzle Performance Data NOZZLE PERFORMANCE U S a BASE NOZZLE SET NOZZLE SET NOZZLE SET NOZZLE SET NOZZLE SET NOZZLE SET NOZZLE SET NOZZLE SET PRESSURE 52 ORANGE 53 BROWN 54 BWE 55 GREEN 56 D 57 GRAY 58 BEGE 59 BLACK PSI Rad GPM Rad GPM Rad GPM Rad GPM Rad GPM Rad GPM Rad GPM Rad GPM 50 56 13 0 61 16 8 65 20 0 67 25 3 68 30 0 70 32 5 37 4 40 1 55 57 13 5 62 17 6 66 20 9 68 26 5 69
13. ge 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 ACME sprinkler repositioning without changing risers This is acommon models only 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 NPT and BSP Threaded Models e Apply teflon tape on riser threads Install sprinkler onto riser and tighten ACME Threaded Models e Install ACME threaded bodies onto Acme threaded swing joint by threading clockwise until hand tight Note ACME threaded swing joints have an o ring that seals to the sprinkler body Teflon tape is not required 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 Table 1 Wire Sizing Chart Connecting Electric Control Wires Maximum allowable length in feet from controller to electric VIH i sprinklers 1 Route control wires to sprinkler location s Provide enough STi extra wire at sprinkler to allow for movement of sprinkler without VOLTAGE AT straining wire connections One common wire and station wire is CONTROLLER required for each sprinkler See Wire Sizing Chart Table 1 for TRANSFO
14. o 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 WARHKING TO PREVENT POSSIBLE HARY DURING SPRINKLER SERYE HG PROCEDURES COH FIRS THE FOLLOWING CONDITIONS EXET PRIOR TO STAR TG A WATER SUPPLY TO SPRINKLER E SHUT OFF ATSQURCE B SYSTEM PRESSURE 6 BLED FROM SYSTEM NCLUD HG CONTROL TUBES C AC POWER E DISCONNECTED AT SOURCE Servicing Sprinkler Mechanism Refer to Toro lllustrated Parts Breakout Book Form No 368 0044 for parts identification 1 2 3 8 Carefully remove O ring from top of riser housing 9 Using Multi Purpose Tool P N 995 83 remove screen by turning it counterclockwise 10 11 12 To change Nozzles carefully insert knife blade edge between nozzle flange and base Lift Cap using knife blade edge or small screwdriver tip inserted between edge of Cap and Body flange Grasping edges of Cap pull sprinkler mechanism up until fully extended While firmly holding Riser Assembly remove Cap Nozzle assembly by turning it counterclockwise Allow Riser Assembly to slowly retract into body Using two small screwdrivers inserted between Nozzle and Cap separate Cap from Nozzle Assembly retained by press fit Pry nozzle loose and remove Align new nozzle as shown in illustration at right Carefully press new nozzles into Nozzle Base until flange
15. r 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 2 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 0 53 1 1 4 3 2 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 3 1 97 0 60 2 5 0 20 75 7 1 80 0 55 12 30 5 500 1892 5 1 55 0 47 2 1 2 6 4 30 113 6 1 84 0 56 Pilot Valve Operation Models 7XX X6 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 pressure for optimum sprinkler operation The pilot valve is factory set to regulate one of four p
16. ressure 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 WA RHIHG 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 SEA HUS HARY System Troubleshooting Pilot Valve Possible equipment failures with causes and corrective action are listed below PROBLEM 1 SPRINKLER WILL NOT TURN ON 2 SPRINKLER WILL NOT SHUT OFF POSSIBLE CAUSE CORRECTIVE ACTION 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 10 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
17. retainer and poly cap from tubing 70 BELOW controller elevation adapter at base of sprinkler Normally Open 01 Valve elevation should not exceed 4 Slide tube retainer over control tubing and with 4 Control Tubing 1000 25 ABOVE controller elevation or i 3 70 BELOW controller elevation attach tubing to adapter Slide tube retainer i Normally Closed 08 Valve elevation should not exceed over adapter area to secure tubing with 4 Control Tubing 1000 0 ABOVE controller elevation or 70 BELOW controller elevation All hydraulic connections on Toro valves are 4 insert type Control line pressure must be equal to or 10 greater than mainline pressure Control line pressure range is 40 to 150 PSI 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 on a velocity fill rate of less than 2 61 m per second See Table 3 below WA RHIHG DUE TO HIGH OPERATING PRESSURE HETER STAND OR LEAN DIRECTLY GOYER TOP OF SPRINKLER OR COME H CONTACT WITH SPRAY FALURE TO COMPLY MAY RESULT H SEAMS HARY 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 ai
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