67HARDI
®
N-SERIES 3-PT SPRAYER DIAPHRAGM OPERATOR'S MANUAL
9.0 TROUBLESHOOTING
9.1 General Spray Systems
Problem Cause
1. No liquid getting to the pump. A. Suction fi lter plugged.
2. Lack of pressure A. Suction fi lter plugged.
B. P.T.O. speed not fast enough.
C. Suction side air leak.
D. Pump valves obstructed
or worn. Replace valves if
necessary (Section 6.6).
E. Check pressure gauge.
3. Pressure jumping A. Suction side air leak.
B. P.T.O. shaft slipping on pump
crank shaft.
C. Suction fi lter partially plugged.
D. Check pressure gauge.
4. Pressure dropping A. P.T.O. shaft slipping on pump
crank shaft.
B. Suction side air leak.
C. Suction fi lter partially plugged.
5. Control box not operating one A. Check connections at battery.
or more boom sections B. Check for blown inline fuse on
power supply wiring harness.
(7.5 Amp - Section 3.3)
C. Check electrical wiring for bad
connection.
D. Check for 12 Volts at boom
distribution valve solenoids.
6. Liquid leaking from pump A. Damaged diaphragm(s).
Replace (Section 6.6).
7. Poor agitation A. Agitation valve not open.
B. Agitation nozzle plugged.
C. Agitation nozzle missing.
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