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Troubleshooting
1. Pump runs, but no flow or pressure at reel.
Possible Cause
Solution
1a. Water supply is turned off.
1a. Turn water supply on.
1b. 2 way valve is open
1b. Reel is in transport position or reel is suspended above the
ground, Arm Switch is not activated. Lower reel to operating
position or activate Arm Override on cab controller to close valve.
1c. Warmup valve is open
1c. Warmup valve is open and allowing fluid to recirculate to tank,
ensure Warmup valve button is deactivated on cab controller
1d. Flowmeter not running reading flow
1d. Air in the flowmeter
2. Pump runs rough, pulsation of discharge hose, and pressure low.
Possible Cause
Solution
2a. Pump not primed
2a. Follow priming sequence
2b. Inadequate fluid supply
2b. tank level low, add fluid to tank
2c. Inlet filter clogged
2c. Remove intake filter and clean. Based on water source, a 2
nd
inline filter on the tank side of the 2” valve may be required
2d. Air leak of considerable volume in pump
suction inlet system.
2d. Check all suction fittings and lines for leaks. Pay attention to
thread sealant on fittings and tightness of fittings and clamps
–
check water level in tank. Sufficient water depth must be
maintained in the tank at all times during operation, and depth must
account for slopes in the field.
2e. Blockage in fluid lines on reel assembly
2e. Blockage in lines, fittings, or nozzles on the reel assembly.
With the unit
running, suspend 12” above the ground. Activate Arm
override and manually turn the reel to ensure all nozzles are
spraying. Remove blocked nozzles, disassemble, and soak in CLR
or similar cleaner. Reassemble. Blockages due to corrosion or
sediment buildup are most likely found on nozzles, ends of tines,
and 90 degree elbows. Replace blocked components as needed.
3. Pump alternately runs smooth and rough, pressure fluctuates.
Possible Cause
Solution
3a. Air leaks in the suction inlet system.
Frequency of pump roughness and pressure loss
are dependent on severity of air leaks.
3a. Check for air leaks. Check lines and clamps.
3b. Fluid leak on discharge side of pump
3b. Visually inspect all fluid connections for loose fittings or
damaged hoses.
Summary of Contents for 720 Dew Simulator
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Page 7: ...7 Safety Decal Locations...
Page 69: ...69 Notes...
Page 70: ...70 Notes...