TROUBLESHOOTING
TROUBLESHOOTING
3PT Sprayer 973PT
Page 75
TROUBLESHOOTING
Problem
Cause
Solution
System loses pressure.
Filter screen plugged
Clean chemical line screens
Pump worn
Check and repair or replace
pump
Faulty suction hose
Check for collapsed suction
hose. Replace hose
Faulty regulator
Replace regulator
Hose leaking
Tighten hose or replace hose
Sprayer pressure too high.
Return hose plugged
Clean or replace hose
Faulty pressure sensor
Calibrate sensor. Replace as
required
Faulty regulator
Repair or replace valve
Wrong agitation valve setting
Open agitation valve slightly
until pressure goes to required
range
Tip too small for volume
Check Manufacturer’s tip chart
for proper size
Chemical system pressure
too low.
Return hose plugged
Clean or replace hose
Faulty pressure sensor
Calibrate sensor. Replace as
required
Faulty regulator
Repair or replace valve
Wrong agitation valve
Close agitation valve slightly
until pressure goes to required
range
Check valves or screens
plugging.
Dirty water
Flush and clean the system.
Use clean water
Poorly mixed chemicals
Mix chemicals more slowly.
Follow mixing instructions
High spray drift.
Boom set too high
Lower boom
Too windy
Wait until wind dies down
The pump does not draw
Water.
Pump is airlocked
Bleed air from pump
Suction line is plugged or
collapsed
Examine suction line. Replace
as required
Pump faulty
Replace pump
Pressure reading fluctuates.
The pump is sucking in air
through the intake or air has
Examine the suction hose and
make sure it is firmly secured.
Summary of Contents for 973PT
Page 1: ...973PT 120 132 3PT SPRAYER OWNER S MANUAL...
Page 2: ...820071 973PT 120 132 3PT Sprayer 2023 12 01...
Page 33: ...SAFETY SAFETY 3PT Sprayer 973PT Page 33...
Page 34: ...SAFETY SAFETY 3PT Sprayer 973PT Page 34 Main Frame...
Page 35: ...SAFETY SAFETY 3PT Sprayer 973PT Page 35...
Page 57: ...SPRAYER CALIBRATION SPRAYER CALIBRATION 3PT Sprayer 973PT Page 57 Table 3 Common conversions...
Page 58: ...SPRAYER CALIBRATION SPRAYER CALIBRATION 3PT Sprayer 973PT Page 58 Table 4 Nozzle flow rates...