Skip to main content ↑ ↓
Topic: Replacing Fuel filter with Racor 790R30 (Read 599 times) previous topic - next topic

Replacing Fuel filter with Racor 790R30

I have been searching threads and maybe I just not searching correctly.
What fittings do I need to replace the existing Winn pre filter system with the Racor 790R30?
Do the fittings on the original Winn system fit on the Racor 790R30 or do I need to purchase new ones? I have the new filter but do not want to start tearing into it until I have the parts I need. I see several people saying it is a simple swap but do not mention the fitting needed. I will update this tread with replacement as I get it done for others.
Pic of my old filter
Jeff & Carolyn
1999 36ft. U320 Foretravel

Re: Replacing Fuel filter with Racor 790R30

Reply #1 –
There are several older threads on this mod.  I had it done at MOT 4 years ago, so I can't answer the fitting size question, but I do know that you'll need to fabricate a plate to mount the Racor to a lower position.  Also, my $.02....a worthwhile mod...no more fuel air intrusion from that cheezy OEM pre filter.
2001 4010 U320 build #5865 "Bluto-d-Bus" since 09/18
2006 Honda Element ESP Toad
Full timing since 2016 in Western MT
Copilot: Sitka
1975 GMC 260 Avion: sold

Re: Replacing Fuel filter with Racor 790R30

Reply #2 –
Removed old filter today. Not too bad but the bolt heads rounded off pretty easy. Have a nut extractor set and that did the trick.
Drilled new holes and tapped them for the new mounting location (5/16-18 thread size). Just moving the filter a little to the right to clear the CAC tube.
Found that the fittings are just standard AN fittings. It is a AN10 ORB to AN10 Flare. I have seen someone mention JIC fittings but that is the same as the AN as long as it is the 37 degree flare. The thread size on both ends of the fittings is 7/8-14. Waiting for them to arrive then I will post the completed Assembly.
As a side note. I did not damage the old filter at all. If anyone wants it with a new filter since I cannot use it anyway. It yours for shipping. Just message me.
Jeff & Carolyn
1999 36ft. U320 Foretravel

Re: Replacing Fuel filter with Racor 790R30

Reply #3 –
I suspect you'll be extremely pleased with your new setup. I installed ours nearl six years ago and have had zero issues since then. The JIC fittings are the same dimensionally as the AN fittings but don't meet the same rigorous requirements needed for aviation purposes and are therefore significantly less expensive.
David and Carolyn Osborn
1995 U320C SE 40' Build 4726 Feb 1995
FMCA 147762
Motorcade 17186
 

Re: Replacing Fuel filter with Racor 790R30

Reply #4 –
Finally got a round to finishing the setup. Wired it into the existing pump wiring. Only needed the black (neg) and red (pos) for the new pump. Used the existing connector which made it easy. Got the tupperware idea from another forum post. Works great.
Jeff & Carolyn
1999 36ft. U320 Foretravel