Great Plains 3P300 Operator Manual - Manual (Page 20)

18
Section 4 Troubleshooting
3/6/06 3P200 and 3P300 Three-Point Sprayer 500-103M
Great Plains Mfg., Inc.
Section 4
Troubleshooting
Problem Problem Area Specific Checks Solutions
Pressure decreasing Between gauge
and liquid supply Pump wearing Rebuild or replace pump
Plugged suction or pump to pressure
head hose Clean hose and reduce cause of
clogging
Plugged Whirlfilter Clean out Whirlfilter, refer to
pages 12 & 13
Plugged gauge Remove the quick disconnect fitting
and flush gauge protector
Pressure fluctuating Between pump
outlet and liquid Check suction hose & fittings for air
leaks. Air in system is indicated by
buffs of air at nozzles Remove obstruction from clogged
area
Vortex in tank suction Align agitators properly
Cracked pump housing Replace pump housing
Pressure increasing Between gauge
and nozzle Nozzle screens clogged Clean screens
Nozzle orifices plugged Remove material with soft brush or
air
Boom hoses becoming clogged Remove obstruction from clogged
area
Boom hoses pinched Use cable ties to position hose so it
will not kink
Pressure cannot increase Pump or electric
ball valve From nozzle charts check liquid
demand against pump capacity (noz-
zle requirement + agitation require-
ment) Reduce swath width by nozzle
reduction; install smaller nozzles
and drive at a lower rate of speed
Electric ball valve or gauge not func-
tional Replace or repair
Pressure adjust switch faulty Test switch & replace if faulty
Fuse is out in control box Replace fuse
Manual pressure adjustment valve not
all the way open Open the manual pressure valve all
the way and allow the electric ball
valve to govern the pressure
No pressure Plumbing Tank shut-off valves off Make sure all tank shut-off valves
are open
Loose fittings Tighten fittings so pump can prime
Collapsed suction hose to pump Replace hose
Obstruction in suction hose or tank Remove obstruction
No pressure Pump Hydraulic pump running in the wrong
direction Switch hydraulic hoses in the tractor
outlet
PTO pump coupler loose Tighten PTO coupler
Pressure cannot decrease Pump or electric
ball valve Tank agitation restricted Check that the agitator valve is open
and that the liquid is being agitated