Installation/Service Parts Replacement
© 2019 EMP, Inc.
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Ensure all fittings, lines, and hoses are selected based on appropriate ratings for the application
(temperature, pressure, fluid type, etc.).
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It is recommended that the fluid quality meets ISO cleanliness code 20/18/15. This is representative of the
nominal filtration of 20 microns or better.
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It is recommended that a strainer on the suction side of the pump be used. The strainer will keep foreign
matter from entering the pump and reduce the risk of the pumping element seizing up. The strainer mesh
size should be large enough so that it does not cause excessive pressure drop, but fine enough to protect
the pump.
Wiring Practices
NOTE:
The use of dielectric grease, such as Dow Corning DC-4, is acceptable as long as the connection is
mated directly after grease application to prevent dirt from being captured by the grease.
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For proper controller operation, the ignition enable line must not be tied to power. It must be supplied from a
separate DC switched source which allows the pump to be turned off before power is removed. Failure to do
so prevents the controller from going through its normal shutdown routine and results in a failure to save
history and diagnostic data.
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The maximum current draw for the OP80 pump is 25 amps. The actual pump current draw varies with oil
viscosity and the pressure required to pump the oil through the system. It is recommended to install a properly
sized fuse, not less than 30A on the power supply line to protect installed wiring.
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Although the pump connector and mating connector are environmentally sealed, care must still be taken to
prevent water from pooling up on the pump connector or the sealing grommet on the pump motor housing.
This can be achieved through proper wire harness routing.
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Route motor lead harness down and away from the pump sealing grommet. Ensure that there is a minimum
of approximately 1.5 inches (38 mm) of straight wire length exiting the sealing grommet prior to changing
wire routing directions.
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Care should be taken to ensure no stress or strain is placed on the interface between the wires and the
connectors else the sealing mechanism could be compromised.
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It is good practice to incorporate drip loops into the wire routing design. Always ensure the connectors are
not located in the bottom of the loop as the water runs off at the lowest point in the harness.
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It is recommended that the pump connector(s) are oriented so that water flows down and past the connectors.
This will prevent water from pooling on the seal between the mating connectors.
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The voltage drop between the battery or power supply and the pump should not exceed 5% of the rated
voltage. This should be verified at the pump’s maximum current draw once all electrical connections are
completed. Systems with excessive voltage drops will yield reduced pump performance.
Service Parts Replacement
The pump does not contain any serviceable components, except for the connectors. For instructions on how to
replace the connectors, reference the Service Parts Replacement section in
