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The suction line of your sprayer should contain a ‘siphon tube’ or intake tube which should be rotated so
that it just touches the bottom of the tank surface. (see Detail Views). Reach in and rotate it, as needed, if
not already in this position.
A shut-off valve is threaded onto the pipe nipple at the intake location on the tank. It is at this location so
you can shut off the flow of solution to access your system’s screen for cleaning.
Checking/Cleaning the sprayer’s filter/screen:
Start your pump and before it shuts off, reach down and Shut the valve to the ‘Closed’ position (lever is
perpendicular to the flow of fluid), then shut off your pump.
Unscrew the knurled nut from the shut-off valve, leaving the valve connected to the tank.
Swing (swivel) the intake assembly towards you. Look in the nut you JUST unscrewed. There is a
screen/washer there.
Remove the screen and clean as necessary. Replace when done and reassemble the entire assembly.
Make sure the valve is turned to the ‘Open’ position before restarting your pump.
‘Cut’ View of a
‘Typical’ Tank
(looking inside)
Intake/Siphon Tube/Screen Detail
Cleaning the Check Valve
:
If you’re experiencing little to no pressure or the pump is not priming and you’ve checked your filter
screen and it’s clean, and you’ve gone through the other trouble shooting tips, you may need to
clean the check valve.
Remove the head of the pump, which is held on by 7 screws.
The first piece inside the head of the pump is called a check valve, it’s the part responsible for building up pressure
and pumping water/solution through the lines.
Clean the check valve under hot, soapy water (such as a good grade dish soap).
Checking the Pressure Switch
:
If your motor is not running and you’ve checked the following: for loose wiring connections, fuse, the switch on
the lead wire was “ON” and made sure you were connected to a fully charged battery and everything is fine, but
the motor won’t run, then it’s time to check to see if the pressure switch is bad.
Remove the cover off the 1” square box (pressure switch) on the head of the pump, the cover is held on by
one phillips-head screw. This will expose the two red wires.
With the pump connected to a good 12 volt power source and everything on.
Slip the two red wires off the terminals and touch them together.
If the motor runs, it means the pressure switch is bad and needs to be replaced.
If it still doesn’t run, try bypassing the switch in the lead wire or using another lead wire. Even if a
tester shows power to the pressure switch, it still could be the switch in the wire that is causing the
problem. If still not
