Toro 880S, 860S specifications Service Procedures, Servicing Sprinkler Mechanism

Service Procedures ________________________________________________________________

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.

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

Note: During reassembly, ensure the cap is correctly installed with the Toro Logo positioned over the main nozzle (10).

2.Insert hooked end of multi-purpose tool (P/N 996-83) into slot in snap ring (13). Pull snap ring inward toward sprinkler assembly, then upward to remove from groove.

Note: During reassembly, ensure snap ring is correctly installed and fully seated in groove.

3.Insert hooked end of mult-purpose tool into slot provided in the nozzle base above main nozzle. Pull riser assembly out of body.

4.While pushing seal/retainer assembly (14 and 15) downward to slightly compress return spring, use a 1/2" nut driver (P/N995-80) to remove nozzle base lock nut (8). Pull nozzle base assembly from drive assembly shaft.

5.Slowly release tension from return spring.

6.Remove the slotted stainless steel washer (7).

7.Three small tabs are provided on the edge of the multi-purpose tool. Insert tabs into debris filter screen. Holding plastic base of riser assembly, turn screen counterclockwise to remove.

8.Remove variable stator and stator support from riser assembly.

Note: The stator support is keyed to the riser assembly. During reassembly, ensure stator support slots engage riser assembly alignment tabs. Refer to Figure 7 for the location of the alignment tabs.

9.Using a 5/8" nut driver (P/N 995-99), unscrew main nozzle from nozzle base assembly.

10.Using a 7/16" nut driver (P/N 995-79), unscrew two inner nozzles from nozzle base assembly. Remove restrictor from one inner nozzle.

11.Pressing only on the ribbed area of drive assembly, push the drive assembly out of riser assembly as shown in Figure 6

CAUTION: When removing or installing the drive assembly, DO NOT press on the threaded shaft or attempt to pull the drive assembly out of riser assembly. Push on the ribbed areas only! Failure to comply may cause separation of drive assembly components.

Note: The drive assembly is keyed to the riser assembly. During reassembly, position the extra rib of the drive assembly to the right of either alignment tab of the riser assembly as shown in Figure 7.

12.Thoroughly clean and inspect all parts and replace as necessary. Reassemble in the reverse order.

Figure 5	1
2
		3
3		18
5	6	9
4	7	8
		10
		11
14	12	19
		20
15
		21
16		14
		22
		23

Figure 6

Figure 7 Alignment Tab

Extra Rib Of

Drive Assy

Alignment Tab

8