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Installation and Service Instructions  

640 Series Rotary Sprinkler  

Installation Procedure  

To assure maximum performance from your 640 Series  

Rotary Sprinklers, read these instructions completely prior to  

installing or servicing the sprinkler.  

FIGURE 1  

0

in.–1/2 in. (0–13mm)  

Construct Swing Joints  

1

. Construct 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 prior 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 plastic threads and components.  

4. Install sprinkler on riser. Align part-circle heads by rotating sprinkler body on riser until radius adjustment slot on top of the nozzle  

rubber cover is positioned to the left side of the intended coverage area.  

5

. Valve-In-head models only: Remove tube retainer and cap from sprinkler fitting. Provide a service loop in control tube at  

sprinkler to prevent binding. Slide tube retainer over end of control tube. Push control tube onto sprinkler fitting and secure with  

tube retainer.  

6. Install sprinklers flush with grade to 1/2 in. (0–13mm) below grade.  

7. Backfill and compact soil around sprinkler avoiding contact with nozzle assembly.  

Servicing the Sprinkler  

Valve Replacement  

WARNING  

POSITIVELY SHUT OFF WATER SUPPLY AT SOURCE PRIOR TO DISASSEMBLING SPRINKLER.  

BLEED ALL PRESSURE FROM SPRINKLER SYSTEM INCLUDING CONTROL TUBES. FAILURE TO  

DEPRESSURIZE SYSTEM PRIOR TO VALVE SNAP RING REMOVAL MAY CAUSE VALVE MECHANISM  

TO FORCIBLY EJECT FROM SPRINKLER BODY RESULTING IN POSSIBLE SERIOUS INJURY.  

1

2

3

. Remove cap set screw with 1/8 in. hex wrench and unscrew cap.  

Body  

. Remove nozzle container seal, nozzle retainer and nozzle/drive assembly from body.  

Snap  

Ring  

. Depress valve mechanism using a long screwdriver or similar tool (see CAUTION below).  

CAUTION  

Do not continue valve removal procedure if the valve cannot be pressed  

down with minimum force. Confirm that water pressure is off and the  

control tube is bled before continuing.  

Valve  

1

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