Prefilling filters - The Combine Forum
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post #1 of 21 (permalink) Old 09-09-2018, 09:58 AM Thread Starter
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Prefilling filters

Do you pre-fill oil filters? Some say it causes more contamination then problems associated with being empty.



Diesel same thing - but you have to fill them, so do you use a filtered source to fill them? Or plug the center and fill from the outside of element?

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post #2 of 21 (permalink) Old 09-09-2018, 10:07 AM
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Oil filters no mainly because buy the time you get them on you end up wearing most of the oil. Fuel yes if it's possible to do. Use a clean supply from shop.

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post #3 of 21 (permalink) Old 09-09-2018, 10:18 AM
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Oil filters no. I change my oil when the engine is hot and there is plenty of oil on the bearings and other surfaces on start up. Fuel filters yes (except on the sprayer as it has an electric fuel pump and will fill them for me for start up). On my trucks, I pre-fill the fuel filters with 2 stroke oil because it is clean right out of a freshly opened bottle. My brother, who is a HD mechanic for 30 years, fills his fuel filters with ATF. I prefer 2 stroke as it is designed to be burned where ATF is not and ATF is high in detergents. Opportunity for contamination is too high filling with diesel fuel IMO because of it's bulk handling. You could use 1 or 4 litre bottles of kerosene though.
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post #4 of 21 (permalink) Old 09-09-2018, 10:31 AM
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Absolutley. The same oil that is being poured in the engine goes down the center of the filter. If you wipe off your pail or have a clean source of oil and do it your self instead of having a carless person do it how could it do anything but good.
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post #5 of 21 (permalink) Old 09-09-2018, 11:51 AM
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Typically I don't fill oil filters with oil and for that reason of an awkward filter location and spilling as a large oil filter filled with oil is a heavy brute to hang onto and get threaded on, and if it was such an issue with oil starvation there would have been all sorts of problems through the years with blown engines as a result of damaged bearings. Cold weather and oil not suited viscosity wise for the conditions is something to be far more concerned about.

Diesel filters, yes if I can put fuel into the filter I will and from a filtered supply before installing. In some cases its an absolute must do since some engines have no way of manually priming or being able to crank and replenish the filter. Again there are situation with awkward filter locations that I spin it on empty and then rely on the manual primer or in the case of an electric primer helper pump ( JD 9600 combine for example ) to fill the filter for me as I manually prime as well ... do all one can before ever turning that key to crank the engine as I've regretted the few times I didn't do this and struggled and struggled to get the engine started.
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post #6 of 21 (permalink) Old 09-09-2018, 11:52 AM
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Yes. I fill it up to a level that won't spill when installing. Usually throw a magnet on the side too. Quite cheap and harmless if it works or not.

Diesel I fill out of a filtered service tank.
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post #7 of 21 (permalink) Old 09-09-2018, 11:55 AM
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If your prefill them pour the oil in the outside holes, it takes patience but that way the oil gets filtered. I usually only prefill the monster oil filters on the 13.5L engine. I have so many engines that use a cartridge style filter that you can't prefill so I don't think it matters all that much.
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post #8 of 21 (permalink) Old 09-09-2018, 12:48 PM
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Quote:
Originally Posted by bsigg View Post
If your prefill them pour the oil in the outside holes, it takes patience but that way the oil gets filtered. I usually only prefill the monster oil filters on the 13.5L engine. I have so many engines that use a cartridge style filter that you can't prefill so I don't think it matters all that much.
Whoever came up with those cartridge style filters are f**king aholes. Gotta pay CNH 100$ for the oil filter cartridge now instead of 30 bucks for the fleetguard or whatever.
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post #9 of 21 (permalink) Old 09-09-2018, 01:09 PM
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Cartridge filters used to be popular. Then everybody switched in the late 60s-early70s to canister. And now back again.... haha
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post #10 of 21 (permalink) Old 09-09-2018, 01:20 PM
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With a cat you put the filter on and use the prime pump to fill the filter. New cummins come with a plug for the Center of the filter so when fill them with diesel it goes in the outside of the filter

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