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DO
Clean and rinse your pump after each use with Fimco Tank
Neutralizer
Winterize your pump or sprayer by rinsing, draining and
running RV Antifreeze through it before storing for the winter.
Use clean water for your spray mixture
Store inside a building when not in use.
DON’T
Use to pump bleach.
Use to pump petroleum products such as diesel fuel,
gasoline or kerosene
Leave your pump sit with spray mixture in it for extended
periods
Use dirty or unfiltered water for spraying
Troubleshooting the Pump:
Motor does not run:
Check for loose wiring connection(s).
Make sure the 'ON/OFF' switch in the lead wire assembly
is in the 'ON' position. "I" is the 'ON' position and 'O' is
the 'OFF' position.
Check for defective pressure switch. Make sure you are
connected to a good 12 volt power source. Make sure
any on/off switches are in the 'on' position. Remove the
cap to the pressure switch. Pull both red wires off of their
terminals, and touch the two ends together. If your pump
runs when you do this, your pressure switch will need to
be replaced.
Check the fuse.
Check for low voltage at the power supply.
Pump does not prime:
Check for air leaks in supply line.
Check for debris in the check valve assembly.
Check for defective check valve.
Check for clogged strainer/filter.
Check for cracks in the pump housing.
Check for empty product supply.
Low Pressure/Low Flow:
Check for leaks in the discharge line.
Check for restriction in the discharge line.
Check for debris in nozzle orifice.
Check for clogged strainer.
Check for proper voltage—try another 12-volt battery.
Pulsating flow (surging):
Low flow may cause pump to surge.
Spray wand is adjusted for a small or fine spray
pattern.
Slightly open bypass (if applicable) to overcome.
If needed, pressure switch may need to be adjusted—
adjust a quarter turn at a time clockwise until surging
stops.
Check for defective pressure switch.
Check for leaks in the discharge line.
Check for restriction in the discharge line.
Check for debris in nozzle orifice.
Discharge hose may be too long.
Check for clogged strainer.
Motor continues to run after discharge is shut off:
Check for empty product supply.
Check for open bypass valve. (if equipped)
Check for low voltage.
Check for leak in discharge line.
Check for defective pressure switch.
System has leaks.
Fuse blows:
Excessive voltage.
Improper adjustment of pressure switch.
Damaged or defective wiring harness.
Half-moon & counterweight are sticking.
Defective pressure switch.
Replacement Pump: 5151088
Includes:
1/2” MNPT Port Kit Fitting #5168832
1/2” Hose Barb Port Kit Fitting #5168833
Pump Model: 5281372
4.5 GPM, 60 PSI
Available Replacement Parts
