Servicing Procedures, Servicing Sprinkler Mechanism

Servicing Procedures ____________________________________________________

The DT series sprinklers are designed to provide the user trouble-free operation for many years without scheduled maintenance. If it becomes necessary to disassemble the sprinkler to correct a malfunction or replace a component, all internal parts of the sprinkler can be accessed 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.

Servicing Sprinkler Mechanism

WARNING

NEVER STAND OR LEAN OVER THE SPRINKLER WHILE THE IRRIGATION SYSTEM IS BEING FILLED, DURING 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.

Note: Refer to Figure 6 for the following procedure:

1.Insert hooked end of multi-purpose tool (P/N 995-83) into slot provided in top of cap (3). Pull assembly upward, grasp and hold in position.

2.Insert hooked end of multi-purpose tool into slot in snap ring (11). Pull snap ring inward toward the sprinkler assembly, then upward to remove from the snap ring groove in sprinkler body. Pull riser assembly out of sprinkler body.

3.Use a 5/8" nut driver (P/N 995-99) to unscrew main nozzle (10).

4.Remove cap screw (1) and cap (3).

5.Grasp return spring (14) and riser (16) firmly and hold in place while removing nozzle base (4). Turn nozzle base assembly counterclockwise to remove.

6.Carefully release tension from return spring (14).

7.Remove spring and seal retainer/o-ring assembly (12 and 13).

8.Remove o-ring (13).

9.Remove rock screen (19) turning it counterclockwise with edge of multi-purpose tool or tips of snap ring pliers (P/N 995-100).

10.Remove drive assembly (17) and stator (18) from riser assembly by carefully pressing on end of threaded shaft.

11.Using a 5/16" nut driver (P/N 995-105), unscrew intermediate nozzle (5 & 6) and inner nozzle (5) and plugs (7) from the nozzle base assembly.

12.Thoroughly clean and inspect all parts and replace as necessary. Reassemble in the reverse order. Note: During reassembly, ensure snap ring is correctly installed and fully seated in snap ring groove before operating sprinkler. See WARNING above..

Figure 6