25
Fault Probable cause Control / remedy
Liquid system
No spray from
boom when
turned on.
Lack of
pressure.
Pressure
dropping.
Air leak on suction.
Air in system.
Suction/pressure
filters clogged.
Incorrect assembly.
Pump valves blocked
or worn.
Defect pressure
gauge.
Filters clogging.
Nozzles worn.
Tank is airtight.
Sucking air towards
end of tank load.
Check if red suction lid/O-ring are
sealing.
Check suction tube and fittings.
Check tightness of pump diaphragm
and valve covers.
Fill suction hose with water for initial
prime.
Clean filters.
Check yellow suction pipe is not
obstructed or placed too near the
tank bottom.
Agitation nozzles not fitted.
Too little distance between yellow
suction pipe and tank bottom.
Check for obstructions and wear.
Check for dirt at inlet of gauge.
Clean all filters. Fill with cleaner
water.
If using powders, make sure
agitation is on.
Check flow rate and replace
nozzles if it exceeds 10%.
Check vent is clear.
Excessive agitation, turn off.
Returns inside tank need relocation.
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