Fuel Filter Change Diesel Generac 75D

sgtjoe · 10-02-2011, 06:39 PM

As I read my manual (fortunately) before I started to change out the diesel fuel filter on my Generac 75D it said service by qualified personnel only. So before I buy the filter is there something I should know????? Never changed a diesel fuel filter before.

JohnInAz · 10-02-2011, 07:41 PM

It' just a spin on filter, no more complicated than an oil filter.

Rook · 10-02-2011, 07:56 PM

It's very similar to a spin-on oil filter. However, when I changed mine for the first time, I found that the PO had put it on so tight that I could not remove it by hand and a regular filter wrench does not have room to work well. So, I purchased an oil filter wrench at AutoZone ($10) that has fingers and fits over the end of the filter and got it off. To prevent an air lock and difficulty starting, you should fill the new filter with fresh fuel before you install it. Rook

sgtjoe · 10-02-2011, 08:33 PM

So, I just unscrew it like an oil filter, fill the new one with clean diesel and screw it back on, right?? There is no reason to shut off any fuel lines or figure out how to charge the system, right??

srydve · 10-02-2011, 08:58 PM

Right. There is also an inline fuel filter that you may also want to consider changing.

sgtjoe · 10-02-2011, 09:15 PM

My manual didn't show that, guess I'll have to follow the fuel line to see if I have one. Anyone else have an inline fuel filter on their 75D??

JohnInAz · 10-03-2011, 08:44 PM

I am unaware of an inline filter. If there is one in there, it is probably a bear to get to. I don't put fuel in my filter when I replace it. When I start the generator after servicing, I use the pre-heat function which I believe will fill the filter. I have never had a problem restarting the genny using this process.

srydve · 10-04-2011, 11:14 AM

Mine was on the same side as the main filter tucked in the frame near the rear of the generator. It was a bit of a pain to change but totally doable. Here is a link to the maitenance kit, the inline is the small brass colored fitting in the front of the picture. 0E1744 - Generac Guardian maintenance kit for RV QuietPact 75D & 85D generator