Duramax7man7 506 #1 Posted August 1, 2017 I have the 122-0800 in my 90' 520h and no issues. I have the FL3339 on my 91' 520 and it seemed to be knocking a bit after oil change and is now pulled being I want to check rod clearances. Could this be the issue? Thanks Just found this list of cross referenced oil filters for Onan 122-0800 oil filter. Fleetguard FL3339 is not even on the list!? http://www.oilfilter-crossreference.com/convert/ONAN/122-0800 Share this post Link to post Share on other sites
tunahead72 2,518 #2 Posted August 1, 2017 No idea about your knocking problem, but I believe you mean LF3339, which does cross-reference to the Onan 1220800: http://www.oilfilter-crossreference.com/convert/FLEETGUARD/LF3339 -------- Edit: I don't know why there are so many different part numbers for each brand on these lists, or why the LF3339 doesn't show up on the Onan 122-0800 list. 1 Share this post Link to post Share on other sites
WVHillbilly520H 10,376 #3 Posted August 1, 2017 "Cummins who owns Onan also owns Fleetguard" so I ordered 2 new Onan 0122-800 filters and received 2 Fleetguard LF3339 in the Onan Green Label parts box earlier this summer, then I got with vendor and was told what I wrote in the first line, so you should be fine with the filters as far your knock IDK, Jeff. Share this post Link to post Share on other sites
Duramax7man7 506 #4 Posted August 2, 2017 Thanks fellas. I did end up calling the local Cummins/ Bridgeway Onan facility and they confirmed what you said. Thank you. Share this post Link to post Share on other sites
