Toro 640 manual Changing Nozzle and Stator, Changing Complete Nozzle Assembly

4.With the valve depressed, grasp snap ring "ears" with TORO snap ring pliers (Model No. 995-07), release snap ring from groove and remove from body.

5.Remove valve mechanism with TORO Valve Removal Tool (Model No. 995-08) or carefully grasp one valve rib with snap ring pliers, pulling valve up and out of body.

6.Reassemble valve mechanism in reverse order.

Note: Due to limited work space in 640 sprinklers, use of Toro Valve Insertion Tool (Model No. 995-35) is recommended to simplify valve and snap ring installation.

7.See Reinstalling Nozzle/Drive Assembly.

Body

Snap

Ring

Valve

Changing Nozzle and Stator

Note: Nozzle changes may be accomplished by changing the entire nozzle assembly or by removing the nozzle container end changing only the upper nozzle. In either case, the appropriate matching stator must be installed (i.e., No. 42 Nozzle and No. 42 Stator, etc.) to ensure proper sprinkler operation.

Changing Complete Nozzle Assembly

1.Remove cap set screw with 1/3 in. hex wrench and unscrew cap.

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

3.Remove 1/16 in. allen set screw in side of nozzle canister.

4.Unscrew nozzle assembly from drive assembly.

5.Assure nozzle seal is located at bottom of nozzle base threads.

6.Install new nozzle assembly — HAND-TIGHTEN ONLY, DO NOT OVER-TORQUE.

7.Turn set screw clockwise until contact with riser threads is made (see CAUTION below).

CAUTION

Do not over-torque set screw. Over-tightening will cause thread damage and possible water leak between lower nozzle base and drive assembly.

8.Remove boss on nozzle rubber cover to identify drive assembly arc.

FIGURE 2

Nozzle

Assembly

Set Screw

Drive

Assembly

2