Spectra Watermakers VENTURA 150, Installation And Operation Manual

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If the pump has power to it but the pump won ’ t run, first check the pressure switch. The
pressure switch (EL - FP - PS) is located on the wet end of the pump and has two red wires
plugged into it (see photo, next page). Jump the two red wires together and see if the pump
runs. You can safely run the system with the pressure switch jumped, just keep an eye on the
feed pressure and don
’ t let system pressure exceed 110 PSI. Replace the switch when a spare
is available. The pressure switch should never open unless there is a problem with the system
or it is incorrectly adjusted. See Adjust Shurflo Pressure Switch on next page.
If the pump will not run with the pressure switch jumped then it is most likely a problem with
the brushes or overheat protection switch inside the motor. The motor will come completely
apart by removing the two screws on the end of the motor. Remove the rear cover and paper
insulator. Pull out the plastic brush holder. The thermal switch is located on one of the brush
leads. With an ohmmeter, check for continuity through the switch. If it is open, you can make
temporary repairs by wiring around it, being careful that your new wiring doesn
’ t chafe on the
moving parts, nor resist the springs that push the brushes on to the commutator. The overheat
switch is unlikely to fail unless the motor has overheated. Consider relocating the pump or
improving ventilation if the overheat protection has failed.
If any corrosion is apparent the brushes may be sticking. Once apart clean all the carbon dust
from all the parts. Clean the commutator with light sandpaper. Make sure to clean the small
grooves on the commutator with a small sharp tool to remove the carbon in between the
segments. Adjust the springs on the brush holders so the brushes slide smoothly in and out. If
the bearings are rough and binding, remove the rubber dust cover to clean them, grease them,
and work them free by hand. Don't service the bearing unless absolutely necessary.
Reassemble in reverse order. You can hold the carbon brushes back with papers clips inserted
through the slots in the brush holder so they don't hang up on the bearing during assembly.
Make sure the corrugated bearing shim doesn't push out. If it does, push it back into place.
SHURFLO PUMP WON ’ T RUN