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A&Sfarms 
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Joined: 02 Nov 2021
Location: Fletcher, Ohio
Points: 18
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 Topic: 190xt getting warm after a rebuild
Posted: 02 Apr 2024 at 12:04pm |
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Recently had the engine in my early 190xt overhauled. Put the engine back in and it runs good, but after it warms up the water temp gauge gets into the red. I get nervous and shut it down. This has happened running a small manure spreader and a 2300 disc with the wings up and not going very deep. It stays in the red even with the tractor stopped. I have topped it off with coolant and that helps until it boils it back out (less than a quart). It has a brand new thermostat from Agco. Before the overhaul, it did not have a thermostat so I am wondering if this was an issue before. I plan on removing the gauge sensor and putting a thermocouple in there so I can see how hot it is actually getting. How hot is too hot? I have heard engines will run a little warmer until it is broke in.
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Joe(OH)
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Joined: 11 Sep 2009
Location: Montezuma, Ohio
Points: 965
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Posted: 02 Apr 2024 at 12:14pm |
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Pull the radiator and take it to Piqua Radiator. He does good work and is reasonably priced.
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Life is simpler when you plow around the stump.
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DrAllis
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Joined: 12 Sep 2009
Points: 19529
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Posted: 02 Apr 2024 at 12:41pm |
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Engines run hotter until broke in is B.S. You need a new temp gauge and sender and a tight fan belt and see what you have then. If the air temp was 100 degrees on a spring day, the engine should not be hitting the red zone.
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A&Sfarms
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Joined: 02 Nov 2021
Location: Fletcher, Ohio
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Posted: 02 Apr 2024 at 1:21pm |
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I wondered. I thought maybe a few degrees, but putting it in the red zone seemed concerning. I did check the fan belt to make sure it was tight. The thought did cross my mind about the orientation of the fan. Could I have installed it backwards and be pushing air instead of pulling?
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DrAllis
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Joined: 12 Sep 2009
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Posted: 02 Apr 2024 at 1:29pm |
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Could be backwards but it will still move air the right way, just a lot less of it. GET A GOOD TEMP GAUGE AND SENDER.
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DanWi
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Joined: 18 Sep 2009
Location: wttn
Points: 1705
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Posted: 02 Apr 2024 at 1:37pm |
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Verify your actual temperature with a heat gun. If the radiator is only a quart down from the neck that would be normal as you don't have coolant recovery. Is the radiator steaming as in actual overheating. You may have an electrical issue with your gauge. If they installed the sending unit with tape or have paint in the threads or some other location messing with your electrical contacts.
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plummerscarin
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Joined: 22 Jun 2015
Location: ia
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Posted: 02 Apr 2024 at 3:29pm |
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I know it’s a fresh rebuild but could the head gasket be leaking ?
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Macon Rounds
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Joined: 18 Feb 2010
Location: Pittsburgh Pa
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Posted: 02 Apr 2024 at 4:38pm |
Like several have already said. Verify actual temperature. These infared thermometers are less than $20 on amazon. And once you get it you won't know how you lived without one.  
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The Allis "D" Series Tractors, Gravely Walk behind Tractors, Cowboy Action Shooting !!!!!!! And Checkmate
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DrAllis
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Joined: 12 Sep 2009
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Posted: 02 Apr 2024 at 5:55pm |
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Filling the radiator FULL is a bad idea, as once the engine warms up it will expand and vomit out a quart or two every time. You refill it and it will do the same thing over and over again. This does not mean it is overheating !!!
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SteveM C/IL
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Joined: 12 Sep 2009
Location: Shelbyville IL
Points: 7985
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Posted: 02 Apr 2024 at 11:29pm |
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Infrared gun first to see what is real. Id' bet against your sender and or gauge plus wiring.
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A&Sfarms
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Joined: 02 Nov 2021
Location: Fletcher, Ohio
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Posted: 03 Apr 2024 at 1:04pm |
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Thanks for all the input. I will get an actual temperature reading and go from there. Hopefully I can get this figured out so I can plant with this thing soon.
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AC720Man
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Joined: 10 Oct 2016
Location: Shenandoah, Va
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Posted: 03 Apr 2024 at 10:21pm |
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My XT runs 170 degrees, I’ve never seen it above 180 even on a 100 degree day baling hay. Not a rebuilt engine but saying what it should be running at. I did replace all gauges with AGCO gauges, sending units after I bought the tractor 8 years ago and gave it a make over. I totally agree with the advice from above, wiring issues on these old tractors can be a problem especially if they set outside. A new gauge and sending unit would also be the 1st thing I would replace as DOC suggested. Test the wiring for a short or open before connecting the gauge and sending unit. Of course a good radiator flush and cleaning is always a good idea.
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1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD
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A&Sfarms
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Joined: 02 Nov 2021
Location: Fletcher, Ohio
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Posted: 18 Apr 2024 at 5:46am |
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I removed the sending unit and installed a thermocouple and Fluke meter i borrowed from work to get actual readings. Once everything dried up enough to run it again, the temps peaked at 188F and then held a steady 183F. I was pretty sure the thermostat is a 190F thermostat and the numbers would confirm that. It would seem the sender/gauge is the problem. It's a pretty big relief that it wasn't something more. Now it's time to get it hooked to the planter.
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