And to answer your question about Pre filling the filter . Most people who fill them fill them wrong , you NEVER fill a filter from the large hole ( outlet ) but everyone does , it must be filled from the small holes ( inlet ) which most people don't, its perfectly fine to pre fil a filter as long as you do it correctly. So the CAT service manual says not to pre fil it for this reason
Yeah but there really is no point in filling them as the Fass is fully capable of doing that work for you I always just turn on the pump and crack the fuel filter until it starts to leak a little bit then I fully tighten it down to bleed the air out of the system
The filters always say not to prefill because most people fill them incorrectly through the middle. If you are going to prefill the filter, it needs to be filled through the outside holes to prevent unfiltered fuel or oil from getting to the engine. In most cases, it doesn't really matter, but that is the reason for the filters saying that
I’m a cat technician and have been for almost 20 years. Caterpillar is extremely serous about their filters. It doesn’t matter if it’s engine oil, hydraulic oil, or fuel. Oh and by the way the engine oil is great too. You can compare the properties between CAT and Shell oil. Several of us up there run cat filters and oil on our Cummins powered trucks fuel/engine and have had no problems!
I worked at a fuel shop, started in the dissasembly end, we'd make a visual of damge, and record finding, as at times it would be warranties. We had pumps, injectors come with contaninates that no way went thru filters, that why fuel systems have primers or electric pumps, stuff has changed from the 70s when i started, to now, and today the tolerances are much tighter, ive seen techs fill filters, yhey used brake clean to clean a funnel, then use a coffee filter, they just said it was cleanliness is why they put filters on, so why use unfiltered, I've always prefilled when no primer, but iprime, im paid by the hour to do good work.
I saw a master mechanic talk about never pre-filling fuel filters or oil filters because of contaminants that can enter the filter when you pre-fill whereas the fuel that is pumped into the filter once it is installed is filtered before it goes to the engine where is the prefilled fuel or oil is not filtered once you fill up the filter
Liquids are typically incompressible. So if the filter is pre-filled (no air pocket left) then you may have trouble putting it on all the way correctly. Also some diesel (or oil) is bound to try to escape and that can dislodge the o-ring.
CAT 396-4596 for the oil filter , its all i use. 1R-0749 engine mounted fuel filter 256-8753 under bed filter Have to have a kit to run those without a lift pump
I always fill the new fuel filter on a diesel to reduce the chance of an air pocket. The last thing you want to do is get an air pocket in a diesel fuel system.
Eddie! You don't prefill fuel filters unless you are filling it through the small outer holes. The inner hole is your clean side. So if there is any particles they are going straight to your CP4! Better hope you didn't have any dirt on that fill nozzle on that transfer tank. Fass will cycle when you push your key and will bleed the system. Just cycle it a few times. Oil filters you prefill but the fuel injection system is WAY more sensitive to contaminates
The reason you do not fill the filters is because it’s a common rail engine. Very sensitive to debris in the fuel. Fuel poured into the opening in the filter gets sucked directly out without going through the filter media. The FASS pump will prime by cycling the ignition key. No need to risk pre filling the filters.
Your gauge cluster is blue because it’s a limited trim and its exclusive to that trim same with the limited long horn it comes with a different cluster
How long have you had that pump & is your filter change procedure the same every time you replace em? Curious cause I'd like to know how long the pump's gonna last by trying to prime it that way - by not loosening the disch. filter (aka is it necessary) & causing back psi/strain on it.
Fass filters are a completely different design. They don't have a drain on the water separator because their design shows it's more effective at capturing water, and it showed that drain style filters drain more fuel and water stays in the filter.
Yes indeed. 3001 is a prefilter on the suction side of the lift pump and 3002 is both a water and fuel filter on the pressure side of the lift pump. Always carry FASS spares with you. If you get bad fuel and the filters becomes clogged, your truck will stop running. They are designed this way.
Yeah I'm so tired of people doing that too. The mechanic told me he soaked my filters in a bucket of diesel fuel before installing them to help them prime😒 kind of defeats the purpose of filtering. Mines an older vp44 truck
Always fill your filters. Some motors you will be sorry if you air them up. I do it just like you other than i full then almost all the way, then cycle the pump a couple times.
I was watching this before installing mine and when removing filters you said the drain goes on the front or the long shaft. Then you installed the opposite way?
Semper Fi brother, did you ever find out why cat says not to use for fuel? I see there was a cat guy on here commenting but he didnt say. From one of fass videos their water fuel separator filter when water is introduced will eventually clog and if I heard right in the video from fass it will then not allow a bypass effectively possible saving an injection system from water intrusion. I wonder if thats why cat doesnt recommend using for fuel due to it not performing the same function as fass??
The reason you don't prefill is because the inside of the filter is where the clean fuel is sucked up and unless you can guarantee the cleanliness of the fuel you could be contaminating the fuel system
Great choice! I run cat filters on my L5p Off topic, but how is the revolver/cover holding up? I know you had an issue with them before. Have they taken care of the issues with them? Would you still recommend? Thank you
I have a l5p tuned and such with Fass lift pump 220 gph cat filter would be ir 0750 however not sure about water separator any ideas sir ? Thanks have a good night
There really is no benefit to pre-filling the fuel filters since you're priming the fuel system correctly by cycling the ignition. As far as pre-filling oil filters, I do it and think its beneficial and perfectly safe as long as the oil is poured from a new/sealed container and not from some oil can that sits on top of a 50 gal drum in a shop. No telling what could have fallen into that oil can which will be introduce into the filter.
Well Ram/Cummins had some turbos go bad and the failure was traced to pre-filling the oil filter. Turns out a small piece of the aluminum foil seal on the oil container was accidently transferred to the center port of the filter and when the engine was started, it went directly to the turbo!
@@rpsmith that could definitely create problems, same as oil from a gun if there is debris on the nozzle. My brand oil doesn't have the foil seals, just the external crack ring on the cap which I make sure comes off the bottle before I pour.
Hey Eddie I switched filters on my fass I've tried carquest , Baldwin,can't remember the other brand and my fuel mileage went way down pulling my toy hauler so I decided to put fass back on and it went back up . I have not tried Cat so let me know if you notice anything different maybe I might try them out since I live in a Caterpillar town .
Hey Eddie, thinking about getting a fass fuel system on my 19 Cummins. Not thinking about going over 550 horse power.. in that case wanted to get your opinion on either going with 100 or 165 GPH ? I heard you say you have the 165..
Baldwin filters are better...wont get into as to why... do your research n find out...but yeah...i use a cat filter housing for pre fuel filters and a cat lift pump tho for my 12v cummins.....8 years n going strong n relatively quiet...esp compared to fass or airdog...i don't do the brand game...i go with what works ..if its good enough for my buds 4 million mile cat engine in his Pete...it works for me
You stuck the fuel nozzle down in the middle hole of you fuel filter. That is the output port of the filter. Small particles that would be very difficult to see without magnifications could have been transferred from the nozzle (your garage is not a clean room) directly to your CP4 and on to your injectors. You gain nothing and risk serious fuel pump/engine damage. For what? It make you fell better?
I can speak for the cat filters because i work for caterpillar. They put that on the filters because if you fill it then you can introduce contamination into the fuel that will not be filtered before going to injection pump. Cat is very big on contamination control. It can happen and has happened before. Not saying it will but cat is very strict on this. Same goes for the hydraulic and engine oil.
I had to use this method of priming. With the filter cracked it would not prime. Didn’t matter how many times I ran the pump. Once I tightened it up I cycled the pump 5 times and it was good to go. I’m see I’m not the only one who doesn’t crack it 😂
@@EddieLife3500 not on the new fass 165s. The water separator according the the fass filter diagram has the water separator on the supply side aka the side with the ling shaft. And the particulate filter is on the suction side.
I think it’s only swapped if you run the “new” fass filters. Old style filters is still with the separator to the back of the truck. I just switched to the New style Fass filters in my truck from the “old” style.
Yeah, just came across this video & I was gonna ask the same thing. I bought a FASS manufactured last yr & the filters have a picture on them of where they go: H2O sep. (3002) goes on the "straw"/discharge side of pump, whereas the particulate filter (3001) goes on the suction side...
The biggest reason the say not to do it is most times you're on a dirty ass job site with who knows how clean of fuel. All it takes is one little thing and an injection pump or injector is toast.
I always fill fuel and oil filters. I have yet to hear an actual sound argument as to why you shouldn’t. “You are going to contaminate it” no, no I’m not
I run these filters also. There is nothing out there that can even come close to the micron rates of these filters, plus the quality of cat filters are far superior to any filter. 3 microns will take out these injectors, FASS is over rated.
@@ethanw4072 I’m fixing to replace my FASS filters with the “XL” FASS filters then after 2 oil changes I’ll replace them again. But if you think the FASS ones seem better I very well may stick with them.
It don't matter how you prefill the filters lol been farming for 30 years and no issues whether it's the big hole or small hole just fill it up and stfu
