P/N 016-0171-584-H 97
NOZZLE CONTROL VALVE MAINTENANCE PROCEDURE
Hawkeye nozzle control valves are designed to provide maintenance free operation with proper equipment
maintenance as recommended by the equipment or chemical manufacturer. However, the seals may become worn
or swollen due to chemical compounds, chemical formulations, or high operating pressures. This may cause
accelerated wear to the sealing surfaces. The following nozzle control valve maintenance procedures should be
performed on the nozzle control system or on individual nozzles if leaks are observed at a specific spray tip.
FIGURE 2. Nozzle Control Valve Maintenance Detail
1. Loosen the fly nut (item 1) and remove the Hawkeye
®
nozzle control valve from the nozzle body.
2. Inspect the large o-ring (item 6) on the face of the valve body (item 4). Replace if necessary.
3. Inspect the small o-ring (item 5) on the tip of the valve body. Replace if necessary.
4. Using a valve body removal tool (P/N 321-0000-457), loosen and remove the valve body (item 4) from the
Hawkeye nozzle control valve.
FIGURE 3. Nozzle Control Valve Exploded View
5. Inspect the o-ring (item 3) on the inside of the valve body. Replace if necessary.
6. Clean and inspect the plunger assembly (item 2). Replace the plunger assembly if the rubber seal is worn or
damaged. Refer to Figure 4 on page 98 for reference to plunger seal condition.
7. Inspect fly nut (item 1). Replace if worn or damaged.
1
5
6
Nozzle
Control Valve
4
Valve
Body
Tool
1
2
3
4
5
6
Nozzle
Control Valve
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