CapstanAG PinPoint III ENVELOP, Operator'S Manual

Page: 79 / 128

TM
Maintenance
Nozzle Valves
Plugged nozzle valves can be classified into two categories:
• Plunger blockage
• Plunger stuck
Plunger blockage results when larger debris catches between the orifice and plunger seal. This is the
smallest flow passage within the nozzle valve.
Stuck plungers result when smaller debris collects around the barrel of the plunger and binds the
plunger in place. Symptoms of a blocked or stuck plunger are:
• Constant application
• Leaking when the nozzle is shut off
• No application
Note: Pinched or split O-rings will also cause nozzles to drip when shutoff.
Note: Operating a plugged nozzle valve for extended periods of time may result in a nozzle valve coil
failure. Immediately clean any plugged nozzle valves.
Note: Before removing the nozzle valves, make sure that the pressure has been released from the
boom tubes.
If plugged nozzles are a frequent problem in a particular boom section, examine the boom filter
screens for plugged or damaged screens.
Recommendation: Use an 80-mesh screen to prevent the nozzles from plugging.
Do a check of the mesh size of the strainers and replace strainers if they are too coarse.
©
2021 Capstan Ag Systems, Inc.
79
PinPoint
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III ENVELOP