64 HARDI
®
NAVIGATOR 550M, 800M, 1000M CENTRIFUGAL OPERATOR'S MANUAL
4. Pressure dropping A. Output from by-pass lines
causing a disturbance around
suction tube.
B. Suction fi lter plugging (If fi tted).
C. P.T.O. shaft slipping on pump
crank shaft (P.T.O. driven
pumps only).
D. Bad seat on spool valve for
boom section control.
E. Bad suction valve or suction
side air leak.
5. Liquid leaking from pump A. Damaged pump seal.
6. Electric control unit not A. Fuse blown.
functioning B. ESC motor bad or micro-switch
plate loose.
C. Bad seat on spool valve.
D. Bad switch or plug on control
box.
E. Print board at back of control
corroded or damaged.
7. Less spray out of one boom A. Bad seat on spool valve for
section than others. boom section control.
8. Poor agitation A. Agitation valve not open.
B. Agitation nozzle plugged.
C. Agitation nozzle missing.
9. Excessive vibrations in hoses A. P.T.O. shaft slipping on pump
crank shaft (P.T.O. driven
pumps only).
B. Suction side air leak.
10. Can't get tank empty. A. Output from by-pass lines
causing a disturbance around
suction tube.
B. Crack or pin hole in suction
tube.
C. Tank is not level (change angle
of tongue).