Great Plains Raven 440 - Manual (Page 47)

CHAPTER
7
Manual No. 016-0159-822 43
Chapter 7
Preventative
Maintenance and
Troubleshooting
General Preventative Maintenance
Preventative maintenance is extremely important to ensure the long life of your machine and the SCS 440
system. The following preventative maintenance measures should be taken on a regular basis:
• Flush the entire system with water after the use of suspension-type chemicals. Failure to clean the system
can result in the crystallization of chemicals, causing plugs in the flow meter, lines, or nozzles.
• Flush and drain the sprayer thoroughly before storing the machine. Freezing temperatures may damage the
flow meter if the water is not drained.
• Remove the console from the cable when not in use for extended periods of time.
• Disconnect the SCS 440 console before jump-starting the vehicle.
• Disconnect the SCS 440 console before welding any component of the machine.
Flow Meter Maintenance
Flow Meter Preventative Maintenance and Adjustment
1. Thoroughly bleed the nurse tank hose and all system lines.
2. Remove the flow meter from the sprayer and flush with clean water to remove any chemicals.
3. Clean and service the turbine and turbine hub.
a. Remove the turbine hub and turbine from inside the flow meter.
b. Clean the turbine and turbine hub, removing any metal shavings or foreign material that may have
hardened on the plastic and metal parts.
c. Verify that the turbine blades and bearings are not worn or damaged.
d. Spin the turbine to confirm that it spins freely with very little drag inside the turbine hub.
DANGER
Thoroughly bleed the nurse tank hose and all
other system lines prior to disassembling the
flow meter, fittings, and hoses, especially in the
case of anhydrous ammonia (NH
3
).