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6080 coolant disappearing from overflow

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ssefick View Drop Down
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Joined: 09 Feb 2022
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ssefick Quote  Post ReplyReply Direct Link To This Post Topic: 6080 coolant disappearing from overflow
    Posted: 06 May 2023 at 8:41pm
Coolant is disappearing from the overflow.

No coolant in the oil - not making oil and no mayonnaise in oil.

Maybe a new radiator cap? Maybe I am being overly cautious?

Anythoughts appreciated.
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SteveM C/IL View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SteveM C/IL Quote  Post ReplyReply Direct Link To This Post Posted: 06 May 2023 at 8:49pm
Tank and hose are sound? I had a cracked tank before on another series.
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KJCHRIS View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote KJCHRIS Quote  Post ReplyReply Direct Link To This Post Posted: 07 May 2023 at 2:39pm
Does the coolant level get low enough that the tops of tubes are visible? If not it isn't low. 
 Does it have an overflow catch tank? IF yes, it should draw some back to radiator as it cools. 
 
 
 
AC 200, CAH, AC185D bareback, AC 180D bareback, D17 III, WF. D17 Blackbar grill, NF. D15 SFW. Case 1175 CAH, Bobcat 543B,
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Post Options Post Options   Thanks (0) Thanks(0)   Quote victoryallis Quote  Post ReplyReply Direct Link To This Post Posted: 07 May 2023 at 8:39pm
Exhaust smell sweet?
8030 and 8050MFWD, 7580, 3 6080's, 160, 7060, 175, heirloom D17, Deere 8760
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ssefick Quote  Post ReplyReply Direct Link To This Post Posted: 07 May 2023 at 8:55pm
o weird exhaust smell. No sweetness. Smells like the other equipment.

No fluid in overflow. Can see the hoses.

Tank doesn't seem to leak when I fill it. I'll check the hose a little better. Nothing obvious.

Full when I open the cap, but nothing in overflow even when I fill it after operation.

Maybe I am misunderstanding how the overflow works. I am just making sure I am not missing something.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote rw Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2023 at 5:36am
For the overflow and recovery system to work properly the radiator has to be full to the top for the filler neck for the pressure cap, so fill the radiator all the way  with the engine cold. The cap has to have a good rubber gaskets that will seal leak free against the top of the filler neck. No dings in the top of the filler neck. The brass valve in the center of the smaller rubber seal should have some spring pressure when you lift it away seal. Check for cracks where the overflow tube solders on the side of the radiator filler neck. Fill the overflow up to the full cold.

The idea was to have system full of coolant eliminating the air chamber in the top tank to lower air entrainment in  the circulating coolant that contributes to poor heat transfer, as well as cavitation/electrolysis and the progressive damage that goes with all that. 
Air entering in any of those places or a leak in the overflow tank will give you an inoperative recovery system resulting in air in the top tank of the radiator when the engine has cooled.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ssefick Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2023 at 6:52am
Thank you for this explanation. I will inspect this part of the coolant system.

Should I get an agco radiator cap if needed to be replaced?

Aftermarket ok? Manual has specifications?

Thanks for all of the help!!!
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Ky.Allis View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ky.Allis Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2023 at 10:06am
If the radiator is staying full, then I wouldn't worry about it. Older tractors or any vehicle did not have recovery tanks and worked just fine. I never had a recovery tank that worked right anyway. Usually they are always empty. 
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