I have searched high and low for the Kubota/Beta or Universal/Kubota specs for the on engine spin on filters. Some sources seem to insiuate it is a 25 micron, Joe Joyce at Westerbeke is adamant that thier filters on the same engine block, are 25 micron absolute, some say 17 and some even say 10 micron and some forum posters claim it is a 2 micron.
What is the micron absolute and nominal rating of the Kubota 70000-43081 or the Beta filter?
Thanks,
CMS
-- Edited by CMS on Wednesday 27th of July 2011 09:28:53 AM
-- Edited by CMS on Wednesday 27th of July 2011 09:29:30 AM
Is that nominal or absolute? Kubota will not give out thier specs and Westerbeke claims their Kubota engines use filters with an "absolute" rating of 25 micron but they don't know the nominal rating? There is a wide variability in filter specs out there.
If yours are 7-10 absolute then I will use those. I spoke with WIX yesterday and they rate theirs as "nominal" at 10 micron but they admit that the absolute is "considerably higher" in the 20-25 micron range...
The Baldwin BF940 is 4 micron nominal and 15 absolute and the Donaldson P550127 is a 5 micron nominal and 17 micron absolute. Fram & Purolator have no clue as to the micron ratings and I went up several engineering layers at each company. When I asked how they build an "equivalent" filter to the Kubota without knowng the micron ratings of the Kubota or their own the answer was "it is not an equivalent these filters fit many applications and the specs may or may not be the same as Kubota." So I guess they are only "equivalent" in thread and o-ring?
Why all the secrecy from Kubota about what size filter in mocrons is needed to protect their engines? Do you think Kubota would tell you, an engine supplier, what the abslolute and nominal ratings of the filters are? They certianly won't tell us engine owners which seems strange...?
The other odd thing is that for Parker/Racor nominal is 95% capture and absolute 98.6% capture but with most of the spin-ons nominal is somewhere around 50% capture and absolute is 97-99%....
