835S and 855S Series Rotary Sprinklers
Contents
1. 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 snap ring ears together with snap ring pliers P N 995 100 and remove snap ring from sprinkler body See Figure 13 gt 2 Use valve removal tool P N 995 08 for 835S or 995 09 for ys 855S 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 ne enabling valve removal by pulling straight up and out See Dan Figure 14 bres Note If valve removal tool is not available use snap ring ee 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 835S or 995 101 for 855S as follows Load snap ring onto insertion tool carrier with stepped side against carrier as shown in Figure 15 While holding snap ring in compressed position slide retainer clip in to hold snap ring ears Load valve assembly2. 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 Figure 16 assembly out of housing 14 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 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 CONTACT WITH IRRIGATION SPRAY A FAILED WARNING NEVER STAND OR LEAN OVER THE SPRINKLER WHILE THE IRRIGATION SYSTEM IS BEING FILLED DURIN
3. cm GPM LPM_ ftsec m sec 1 2 1 3 2 76 1 60 0 49 3 4 1 9 3 11 4 1 92 0 59 1 2 5 5 18 9 150 046 f 6 152 150 5678 173 053 1 1 4 31 10 37 9 186 057 8 202 250 946 3 170 052 1 1 2 3 8 10 37 9 141 043 10 254 450 1703 0 1 97 060 2 5 0 20 75 7 1 80_ 0 55 2 1 2 6 4 30 113 6 1 84 0 56 Arc Adjustment Procedure WARNING A DUE TO THE HIGH OPERATING PRESSURE NEVER STAND OR LEAN DIRECTLY OVER THE TOP OF THE SPRINKLER OR COME IN CONTACT WITH THE SPRAY FAILURE TO COMPLY MAY RESULT IN SERIOUS INJURY The 835S and 855S sprinkler models can be operated in full circle or part circle operation In part circle operation the sprinkler arc can be adjusted from 40 330 When full circle 360 operation is selected the sprinkler will rotate in a clockwise direction only The arc is factory preset at 180 The left side of the arc located at the end of the 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 the clockwise rotation 1 Using the sprinkler tool pull the sprinkler riser up from the body See Figure 3 2 Find the sprinkler left stop by rotating the turret counter clockwise until it stops The left stop indicates the fixed stop of the arc See Figure 4 3 Check the left stop alignment with the left most a
4. Valve page 11 d Insufficient pressure in controller supply line and or sprinkler control tube N C Models Check pressure Sprinkler will a Constant 24 VAC from controller Electric Models not 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 Sprinkler Mechanism 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 Head sticks up a Dirt in riser assembly Flush out See Flushing Procedure on page 11 b Damaged or missing return spring Replace c Damaged riser Replace Poor distribution pattern a Nozzle plugged with debris Clean or replace nozzle b Nozzle orifice damaged Replace nozzle c Low operating pressure De
5. on carrier as shown e Locate position of communication tube in bottom of sprinkler body and orient insertion tool accordingly e 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 855 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 14 Figure 13 Figure 15 _Snap Ring In Retainer Clip Snap Ring Release Mechanism Valve Assembly stepped Side Orientation In Carrier of Snap Ring Press Valve Assembly Into Position Snap Ring Released Servicing Pilot Valve WARNING MANUAL OR AUTOMATIC OPERATION OR WHEN PERFORMING SPRINKLER SERVICE PROCEDURES DIRECT 1 NEVER STAND OR LEAN OVER THE SPRINKLER WHILE THE IRRIGATION SYSTEM IS BEING FILLED DURING 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 16 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
6. 5 5 5 5 24 24 24 24 12 10 4 0 5 5 24 5 5 5 5 Figure 2 2 Attach control wires to solenoid leads using an approved waterproof splicing method Station Wire 1095 334m A CAUTION All wire splices and field connections must be waterproofed to prevent short circuit to Common Wire 1095 334m ground and subsequent controller damage AA Total Wire Length 2190 668m Connecting Hydraulic Control Tubing Hydraulic Models Only 1 Route control tubing from the controller to the sprinkler location s Table 2 Hydraulic Control Systems Note Leave an 18 45 7cm service Maximum Distance loop of tubing at each sprinkler to Type of System From Controller Elevation Restrictions facilitate movement of sprinkler and Normally Open 01 Valve elevation should not exceed service operations Refer to Table 2 for with 3 16 Control Tubing 500 25 ABOVE controller elevation or tubing run length and sprinkler 70 BELOW controller elevation elevation information Normally Open 01 Valve elevation should not exceed 2 Flush tubing thoroughly to remove all with 1 4 Control Tubing 1000 25 ABOVE controller elevation or air and debris 70 BELOW controller elevation 3 Remove the tube retainer and poly cap e All hydraulic connections on Toro valves are 14 insert type e Control line pres
7. G MANUAL OR AUTOMATIC OPERATION OR WHEN PERFORMING SPRINKLER SERVICE PROCEDURES DIRECT 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 2004 The Toro Company Irrigation Division Form Number 373 0278 Rev A
8. Introduction The 835S and 855S series full circle adjustable part circle rotary sprinklers are Count on it 835S and 855S Series Rotary Sprinklers Installation amp Service Instructions designed specifically for golf course applications Manufactured from durable high strength engineering plastic and stainless steel components the 800S series 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 Features Specifications and Performance Application Data 835S Electric VIH 855S Electric VIH Full circle 360 with uni directional clockwise rotation adjustable part circle 40 330 configuration Arc adjustment from riser band in 5 increments Ratcheting riser in 2 increments Adjustable trajectory main nozzle from 7 30 in 1 increments Full 4 10 16 cm pop up clears tall grasses Color coded nozzles by radius and gallonage Cap serves as an effluent water indicator Variable stator ensures 3 minute rotation 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 835S Series Ra
9. 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 S variations within the system and maintains a constant pressure for optimum S j 80 PSI sprinkler operation The pilot valve is factory set to regulate one of four Bt 5 6 kg cm pressure levels 50 psi 3 4 bar 65 psi 4 5 bar 80 psi 5 5 bar or 100 PSI 6 9 bar Change the pilot valve operating pressure by loosening the nut that secures the selector lever Position the selector lever to the desired operating pressure and hand tighten the nut See Figure 9 100 PSI 7 0 kg cm 65 PSI 4 6 kg cm 50 PSI 3 5 kg cm Troubleshooting Pilot Valve PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION Sprinkler will a No 24 VAC to solenoid 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
10. ation 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 Service Procedures WARNING 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 NEVER STAND OR LEAN OVER THE SPRINKLER WHILE THE IRRIGATION SYSTEM IS BEING FILLED DURING Servicing Sprinkler Mechanism Note Refer to Figure 10 for the following procedure 1 Remove the cap screw 1 and cap 2 Note During reassembly ensure the cap is correctly installed with the Toro Logo positioned over the main nozzle 9 Insert the hooked end of the multi purpose tool P N 995 83 into the snap ring slot 3 Pull the snap ring inward towards the sprinkler assembly then upward to remove from the groove in body Note During reassembly ensure the snap ring is correctly installed and fully seated in the sprinkler body Insert the hooked end of the tool into the slot provided in the nozzle base above the right intermediate nozzle 7 Pull the riser assembly until enough clearance to handle Hold onto the riser bod
11. bility 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 Teflon tape on riser threads not required on ACME threads Install sprinkler to the riser and tighten A 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 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 Table 1 Wire Sizing Chart Total Wire Length Between Controller and Sprinkler 23 23 23 23 23 23 23 24 24 24 24 24 24 4 10 10 Note Wire length data provided in Table 1 is the sum of the station and common wire legs See example in Figure 2 23 23 23 23 23 23 23 10 10
12. dius 52 92 25 trajectory Flow Rate 13 7 45 7 GPM Trajectory adjustable from 7 30 Arc full circle adjustable part circle 40 330 Recommended operating pressure 65 psi 4 5 bar Minimum pressure 40 psi 2 7 bar Maximum pressure 150 psi 10 3 bar Precipitation rate Minimum 0 56 hr Maximum 0 60 hr 1 NPT BSP or ACME female thread inlet Spike Guard Solenoid Inrush current 0 12A 24 V a c a Holding current 0 10A 24 V a c Manual control On Off Auto Elec only Check O Matic model checks up 37 11 27 m to of elevation Color coded nozzles see nozzle chart p 2 Three body activation types available Electric VIH Normally Open Hydraulic VIH and Check O Matic Three body thread types available NPT BSP and ACME m Manual control at the sprinkler On Off Auto Electric only All internal components serviceable from the top of the sprinkler Large selection of color coded nozzles available m Durable plastic and stainless steel construction m Spike Guard solenoid for superior surge protection and lower operating amperage m Constant velocity drive Back nozzle capable 855S Series Radius 52 100 25 trajectory Flow rate 16 62 GPM Trajectory adjustable from 7 30 Arc full circle adjustable part circle 40 330 Recommended operating pressure 80 psi 5 5 bar Minimum pressure 40 psi 2 7 bar Maximum pressure 150 psi 10 3 bar P
13. formance Chart U S B Nozzle Set Nozzle Set Nozzle Set Nozzle Set Nozzle Set Nozzle Set Nozzle Set Nozzle Set Nozzle Set ase 151 Yellow 52 Blue 53 Brown 54 Orng 55 Green 56 Gray 57 Black 58 Red 59 Beige Pressure 7 A RED GRAY A oRNG Ml GRAY A oRNG I GRAY A BLUE E GRAY A BLUE Il GRAY A onNG I GRAY A BLUE I GRAY BLUE W GRAY A BLUE Il GRAY psi Radius GPM Radius GPM Radius GPM Radius GPM Radius GPM Radius GPM Radius GPM Radius GPM 50 52 113 9 62 17 4 66 20 7 69 286 65 54 15 7 64 20 8 68 23 4 74 31 2 76 33 8 81 35 7 80 57 17 2 68 22 9 72 25 8 77 34 4 79 37 2 85 39 4 89 43 6 92 47 5 96 57 0 100 59 19 1 73 255 76 28 7 80 38 2 84 413 89 43 7 94 485 95 51 5 100 61 1 Low flow Stator Medium flow Stator High flow Radius shown in feet Toro recommends the use of a 1 4 30mm swing joint at flows over 25 GPM 95 LPM Sprinkler radius of throw per ASAE standard S398 1 Main Nozzle A Intermediate Nozzle H Inner Nozzle All sprinklers are equipped with the selectable pilot valve that allows settings at 50 65 80 and 100 psi Sprinkler Application Data Nozzle Color Code Sprinkler Spacing Guidelines Nozzle Main Inner Intermediate 1 Yellow Gray Blue 2 B
14. ge Replace if necessary e Damaged piston seal or piston assembly Replace valve assembly 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 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 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 a 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 st
15. lue Gray Red 3 Brown Gray Orange 4 Orange Gray Orange 5 Green Gray Blue 6 Gray Gray Blue 7 Black Gray Orange 8 Red Gray Blue 9 Beige Gray Blue 1 Square Spacing No wind 55 of diameter 4 mph wind 50 of diameter 8 mph wind 45 of diameter 1 Triangular Spacing No wind 60 of diameter 4mphwind 55 of diameter 8mphwind 50 of diameter 1 Single Row Spacing No wind 50 of diameter 4 mph wind 50 of diameter 8 mph wind 45 of diameter Note Designing for zero 0 mph wind conditions is not Used with 855S series sprinklers only recommended Design for worst wind conditions For additional information refer to Toro Technical Data Manual form number 490 1737 Precipitation Rate Formulas 1 Square spaced sprinklers in pattern GPM of full circle x 96 3 Spacing 1 Triangular spaced sprinklers in pattern GPM of full circle x 96 3 Spacing 0 866 1 Area and flow Total GPM of zone x 96 3 Total irrigated square feet of zone 1 Single row GPM of full circle x 96 3 Spacing Scallop Installation Procedure To assure maximum performance from your 800S series sprinklers read these instructions completely prior to installation or service Figure 1 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 possi
16. rea being irrigated Adjust by ratcheting the riser clockwise or counterclockwise until the sprinkler left stop points to the correct area See Figure 5 The turret can also be used to adjust the left stop If the left stop falls short of the desired border rotate the turret counterclockwise until it is aligned with the left watering border See Figure 4 If the left stop exceeds the border rotate the turret clockwise until the right stop Continue to advance the turret the same distance that the left stop exceeded the border See Figure 6 4 Find the sprinkler right stop by rotating the turret clockwise until it stops See Figure 6 Note If the sprinkler is set at 360 full circle it will rotate clockwise only 5 Adjust the arc while the turret is pointing at the right stop Hold the sprinkler riser firmly while pressing the release on the adjustment band Rotate the turret counterclockwise or clockwise to the desired right stop See Figure 7 6 Activate the sprinkler to check proper arc setting and adjust as necessary Figure 3 Adjustment Band Angle Indicators Figure 4 Figure 5 Figure 6 Figure 7 The adjustment band of the 835S and 855S have markers at predetermined arcs By aligning the adjustment band indicators to the turret arrow you can set the sprinkler arc to 90 180 270 or 360 Figure 8 Pilot Valve Operation Electric Models Only
17. recipitation rate Minimum 0 57 hr Maximum 0 68 hr 1 5 NPT BSP or ACME female thread inlet Spike Guard Solenoid Inrush current 0 12A 24 V a c a Holding current 0 10A 24 V a c Manual control On Off Auto Elec only Check O Matic model checks up to 37 11 27 m of elevation Color coded nozzles see nozzle chart p 2 835S Series Performance Chart U S E Nozzle Set Nozzle Set Nozzle Set Nozzle Set Nozzle Set Nozzle Set Nozzle Set ase 31 Yellow 32 Blue 33 Brown 34 Orange 35 Green 36 Gray 37 Black Pressure 7 BLUE W GRAY RED W GRAY A oRNG W GRAY A oRNG W GRAY A BLUE GRAY A BLUE W GRAY ORNG I GRAY psi Radius GPM Radius GPM Radius GPM Radius GPM Radius GPM Radius GPM Radius GPM 50 52 13 7 61 17 1 64 20 2 69 27 4 65 54 15 5 63 20 5 66 22 9 74 30 0 76 32 4 80 34 0 80 57 17 0 67 22 6 70 25 3 77 33 2 79 35 8 84 37 9 86 40 2 100 59 18 9 72 25 2 74 28 2 80 37 0 84 39 9 88 42 5 92 45 3 Low flow Stator Medium flow Stator Radius shown in feet Toro recommends the use of a 1 30mm swing joint at flows over 25 GPM 95 LPM Sprinkler radius of throw per ASAE standard 8398 1 Main Nozzle A Intermediate Nozzle H Inner Nozzle All sprinklers are equipped with the selectable pilot valve that allows settings at 50 65 80 and 100 psi 855S Series Per
18. sure must be equal to or greater than mainline pressure from the tubing adapter at the base of e Control line pressure range is 40 to 150 PSI the sprinkler 4 Slide the tube retainer over the end of the control tubing and attach tubing to adapter 5 Slide tube retainer over the adapter area to secure tubing System Start Up WARNING A TO PREVENT POSSIBLE SERIOUS INJURY DO NOT STAND OR LEAN DIRECTLY OVER ANY SPRINKLER WHEN FILLING SYSTEM OR WHEN ACTIVATING MANUALLY AT THE SPRINKLER 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 1 Use jockey pump only to fill the system at a velocity fill rate of less than 2 0 61 m per second A 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 2 Use quick coupler keys at all tees and greens 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 continuously while filling the system 3 After water has filled all lines and all air is removed remove the quick coupler keys Table 3 Recommended System Fill Rate Pipe Size Velocity Pipe Size Flow Velocity in cm GPM _ LPM ftsec_ m sec f in
19. termine why system overloaded and correct Main Valve PROBLEM Valve won t close Electric Valve won t close Hydraulic Valve won t open Electric Valve won t open Hydraulic Sprinkler Weeping Slow leak in valve Several valves on different stations fail to close Hydraulic 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 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 dama
20. y 11 and carefully extract it from the sprinkler body A CAUTION The seal retainer 4 will eject caused by the decompressing spring 5 as it clears the sprinkler body Three small tabs are provided on the edge of the multi purpose tool Insert tabs into the debris filter screen 15 Holding the plastic base of riser assembly turn the screen counterclockwise to remove Remove the variable stator 14 from riser assembly Remove the drive assembly retaining screw 12 and pull the drive assembly 13 using a pair of pliers See Figure 11 A CAUTION When removing or installing the drive assembly do not use the turbine to pull the drive assembly Use the drive assembly body to extract it out Failure to comply may cause separation of the drive assembly components Note During reassembly ensure drive assembly is properly aligned with the retaining screw Using a 5 8 nut driver P N 995 99 unscrew main nozzle 9 from nozzle base assembly Using a 5 16 nut driver P N 995 105 unscrew the inner 8 and intermediate 7 nozzles Thoroughly clean and inspect all parts and replace as necessary Reassemble in reverse order When installing the riser assembly to the sprinkler body align the ratchet ring with the inside body rib Use the indicator on top of the sprinkler body to center the ratchet ring See Figure 12 Figure 10 Figure 11 Figure 12 5 2 PN 2 p Y
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