Several days ago I called Freightliner and asked about the pre-fuel filter in my2 filter, 2006 CAT powered Discovery. The advised it was a 30 micron unit.
I know some CAT powered RVs came with a 10 micron pre-filter installed. When I purchased the coach several months ago, I noticed the prior owner had installed a WIX 33630 , 12 micron nominal filter.
I question Freighliners choice of filter application. I find a 30 micron fuel filter feeding a 2 micron filter a bit mis-designed.
Is it OK to keep what I perceive to be a lower micron filter, the 12 micron in place of the 30 micron unit? Can I replace the 30 micron with 10 micron filter?
Thanks in advance.