did a maintenance service on my 750 tractor
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    dvice's Avatar
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    did a maintenance service on my 750 tractor

    changed the engine oil, changed the air and oil filter, as well as this FUEL FILTER..man was it ugly! made sure the antifreeze was looking good too...bright green!

    power washed the machine as well.... funny the book had a much longer interval for some of those items than I would have guessed!

    I probably didn't even have to change the air filter...it looked fine.. previous owner must have used it in clean conditions


    dvice
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    John Deere 750 tractor, with #67 FEL , #7 backhoe, (sold)
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    Keeper of the GTT Cookies dieselshadow's Avatar
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    Check the inside of your fuel tank. That black stuff looks like algae. If it's in your tank, you'll want to clean it out and treat it with an algaecide.
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    Senior GTT Super Slacker Gizmo2's Avatar
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    That is one bad looking filter. I'd take a look in the tank also.
    Keith

    JD 2320, 200CX FEL/61" bucket , 46 BH/16" bucket, Artillian Forks, 72" Snow Blade, Landscape Rake, Ballast Box, PHD, The Wife
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    mbullism's Avatar
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    When i bought my 750 there was water in the filter glass, and the filter looked similar...drained and flushed the tank, new filter element and good to go....not .

    I took apart the fuel gage/gas cap assembly, cleaned and reassembled with new lens and o-ring. I still get a ton of condensation under the gage lens, and I suspect the tank vents thru the cap somehow... the lense and o-ring are new, so I don't think it's rain getting in, but the inside of the lense is subject to accumulating water...

    ... and I now have about a 1/4" of water in the filter glass again, though the element still looks decent.

    If the condensation is normal, the water separator "feature" of the filter glass seems like maintenance... though I never thought algae. Is this common?

    MB
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    felixm22's Avatar
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    Quote Originally Posted by mbullism View Post
    When i bought my 750 there was water in the filter glass, and the filter looked similar...drained and flushed the tank, new filter element and good to go....not .

    I took apart the fuel gage/gas cap assembly, cleaned and reassembled with new lens and o-ring. I still get a ton of condensation under the gage lens, and I suspect the tank vents thru the cap somehow... the lense and o-ring are new, so I don't think it's rain getting in, but the inside of the lense is subject to accumulating water...

    ... and I now have about a 1/4" of water in the filter glass again, though the element still looks decent.

    If the condensation is normal, the water separator "feature" of the filter glass seems like maintenance... though I never thought algae. Is this common?

    MB
    Yes algae can be common if water is present in the tank. You may try to keep the tank full of fuel. When the tank is full there is no air space for water to condense out of Lessing the chances of getting water in the fuel.


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    dvice's Avatar
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    there was no water in the glass. I usually have the tank half full or above.... the machine sips diesel it seems... I took the gauge apart and painted the needle so I could see it better..the gauge doesn't move very fast, and I get antsy and fill the tank up anyway!!

    because I have been told not to run the machine out of fuel.

    Ill keep an eye on the new filter and see if it gets some algae growing or not

    bob
    John Deere 750 tractor, with #67 FEL , #7 backhoe, (sold)
    John Deere #35 back blade,
    York 6ft rake.
    John Deere D170 lawn Tractor 54" cut.
    John Deere 4300 HST,with 430 loader.
    John Deere 48 backhoe
    post hole digger

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    Quote Originally Posted by dvice View Post
    there was no water in the glass. I usually have the tank half full or above.... the machine sips diesel it seems... I took the gauge apart and painted the needle so I could see it better..the gauge doesn't move very fast, and I get antsy and fill the tank up anyway!!

    because I have been told not to run the machine out of fuel.

    Ill keep an eye on the new filter and see if it gets some algae growing or not

    bob
    Because Im an Ex- Orange County neighbor with friends in Dutchess county I thought I would pass this on to you.

    I think the reason why you were told not to allow the tractor to run out of fuel, is because your tractor must have fuel injection. If you run out of fuel & suck in air, at the injectors, you run the risk of having to bleed out the air by loosening the injector lines & rolling over the engine until you get proper fuel flow. It's just a messy time consuming PITA to do. This becomes necessary to remove the air which would stop the proper flow of fuel & cause misfires, etc. I don't think it has anything to do with algae in your fuel.

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    mbullism's Avatar
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    Quote Originally Posted by Maddog View Post
    Because Im an Ex- Orange County neighbor with friends in Dutchess county I thought I would pass this on to you.

    I think the reason why you were told not to allow the tractor to run out of fuel, is because your tractor must have fuel injection. If you run out of fuel & suck in air, at the injectors, you run the risk of having to bleed out the air by loosening the injector lines & rolling over the engine until you get proper fuel flow. It's just a messy time consuming PITA to do. This becomes necessary to remove the air which would stop the proper flow of fuel & cause misfires, etc. I don't think it has anything to do with algae in your fuel.
    the injectors and airlock if you run out of fuel is true for the 750...
    1987 750 MFWD w/70 FEL... 350 420 435 445 455 470 hours and counting
    Kens bolt on hooks
    Artillian forks - 24"&42"s
    County Line/Tartar 5ft Landscape Rake, 5ft Box Blade
    2016 X380 48"deck

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    Keeper of the GTT Cookies dieselshadow's Avatar
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    Quote Originally Posted by Maddog View Post
    Because Im an Ex- Orange County neighbor with friends in Dutchess county I thought I would pass this on to you.

    I think the reason why you were told not to allow the tractor to run out of fuel, is because your tractor must have fuel injection. If you run out of fuel & suck in air, at the injectors, you run the risk of having to bleed out the air by loosening the injector lines & rolling over the engine until you get proper fuel flow. It's just a messy time consuming PITA to do. This becomes necessary to remove the air which would stop the proper flow of fuel & cause misfires, etc. I don't think it has anything to do with algae in your fuel.
    All diesels are injected, one way or another. Most of our little tractors are mechanically injected such as the OP's 750. Pretty much everything new and bigger than a MCUT (from 18 wheelers to large tractors to pickups) are electronically injected.
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    110 round fender in the shop for crustoration
    Ferris IS3200Zzero turn mower

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    Quote Originally Posted by dieselshadow View Post
    All diesels are injected, one way or another. Most of our little tractors are mechanically injected such as the OP's 750. Pretty much everything new and bigger than a MCUT (from 18 wheelers to large tractors to pickups) are electronically injected.
    I think I did state that in my quoted reply, but I made it sound like I was asking about injection. My bad.

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