What could cause oil to back flow to the intake filters?

by Shannon
(Alabama)

We have changed the filters and don't really know what to look for past that.

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Aug 15, 2016
back flow
by: Doug in s.d.ca

Not positive about your unit, but generally there is a check valve between the intake/filters and the pump screw. That should close off if/when the outside pressure is less than that in the intake - that valve is likely not working right.

Aug 13, 2016
Before
by: SB

It started before.

Aug 12, 2016
oil in intake
by: Doug in s.d.ca

Did this start before you changed the filters, or after?

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