Agracat 254 runs hot: Jinma Farmpro Agracat  -- Chinese Tractors Discussion Forum and Review Agracat 254 runs hot: Jinma Farmpro Agracat -- Chinese Tractors Discussion Forum

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Discussion Boards > Active Subjects > Messages as Posted > Jinma Farmpro Agracat Forum

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 07-02-2007, 14:34 Post: 143363
yofrient



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 Agracat 254 runs hot

My Agracat 254 runs really hot. The temp guage usually pegs out after 20 minutes of mowing. And I'm adding a half gallon of 50/50 coolant before each mowing.

I'm using a Spider 6ft finish mower. When mowing, if I let the RPM go down (like when I get off the tractor to move something) , I get coolant spewing from the overflow hole under the radiator cap. I usually run my mower on the slower RPM in Low 3rd gear. Is this the right gear for mowing or should I be running in something else. I was thinking I might be operating in the wrong gear and causing the heat. Anything less would be too slow and faster would be too fast.

What is an acceptable operating temperature.

I've seen somewhere where the type of oil may make the tractor run hotter.

Anyone






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 07-02-2007, 15:06 Post: 143366
earthwrks

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 Agracat 254 runs hot

You didn't say how tall the grass was, but if it has gone to seed the radiator fins may be plugged. A good pressure washing will do it good.

The radiator may plugged internally with calcium. There might be a way chemically to clean it (automotive-type radiator flush). You have to have a new core put in---I have had vehicles where this was the only problem.

When I run my 33hp hydrostatic New Holland I run it full throttle just as the mfg. recommends for any and all work. Exception when brushhogging and there is a chance of hitting rocks or stumps.






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 07-02-2007, 16:22 Post: 143371
kthompson



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 Agracat 254 runs hot

Just wondering, does it only run hot with the mower? If so check the mower to be sure all blades turn freely and the blades are sharp. A clogged air filter can cause it to run hot, as EW pointed out so can a clogged radiator either internally or external and you could be mower too low over loading the cutter and thus the tractor. You need to run the tractor at what ever speed is necessary to get the mower at the RPM it is rated for such as 540. Then use the trans to get the ground speed.






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 07-02-2007, 16:47 Post: 143372
yofrient



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 Agracat 254 runs hot

Thanks for the answers fellas!

Just raised the mower deck up one notch 2 weeks ago and that didn't help. Checked the radiator fins and screen and they looked fine. Air filter may need to be checked but it was replaced when I bought the tractor 4 months ago so I doubt that's it. Running mower at 540 RPM Low 3rd gear. My primary use is mowing but I did run without the mower while doing dirt work a month ago and it did get hot. I'm putting new antifreeze in the radiator every 2 uses (no overflow/boilover resivour) and have not noticed any rust or sediment. I know it's circulating because its boiling. If it was just sitting in the radiator due to clog, I wouldn't imagine it would get hot.

Thanks again!






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 07-02-2007, 20:01 Post: 143378
kleinchris



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 Agracat 254 runs hot

Thermostat?






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 07-02-2007, 21:33 Post: 143381
candoarms



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 Agracat 254 runs hot

Yofrient,

You wrote something that sounds alarm bells with me.

Earlier, you wrote something about using your tractor's engine RPM to help you control your ground speed. One gear is too fast, and the next lower gear is too slow.....so you adjust your engine RPM in order to get a ground speed that you are happy with.

Generally speaking, using your tractor's engine RPM to control your ground speed is a very bad idea. In fact, you should never do this when using any implement. By lowering your tractor's engine RPM, you could find yourself in a situation in which you begin to lug the engine. Lugging down your engine will create a tremendous amount of heat. Even if your cooling system is working properly, there is nothing that can be done to help the situation, except to increase your engine RPM and then choose a lower gear -- raise your implement slightly -- or both.

Please try running your tractor in a lower gear, using full engine RPM. If this doesn't help solve the problem, try raising your implements a bit.

Joel






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 07-02-2007, 22:13 Post: 143382
earthwrks

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 Agracat 254 runs hot

You can have a certain amount of "circulation" without heat exchange. Calcification effectively insulates the radiator tubes from the coolant and so it will not cool. If you keep this up you could blow a head gasket or worse, warp a head, and or lock up the motor.

I'd be tempted to temporarily hang a pop bottle somehwere near the engine and run an overflow hose to it and see if you get anything in there. Be sure to run the hose to the bottom so that when it cools it will be siphoned back into the radiator. If you do this and don't get any overflow, that steam is going somewhere---like through a blown head gasket or cracked head.

But I'm jis' sayin'.






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 07-03-2007, 07:46 Post: 143392
kthompson



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 Agracat 254 runs hot

I have seen clogged (internally) radiator boiling over. It was cool to touch. It would cost you little to try flushing the radiator. However, if it is really clogged, doubt you would be able to buy chemical that will open it.






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 07-03-2007, 13:18 Post: 143401
yofrient



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 Agracat 254 runs hot

I'm sorry but I may have been misunderstood: When I said slower RPM, I was referring to the PTO RPM lever being on the 540 RPM setting for the mower. I'm not using engine RPM to adjust speed (not lugging). I set the tractor to Low 3rd gear and run the tractor at a constant RPM with the mower deck running on 540 RPM. With no Tach, I usually use full throttle as I assume that's how it is tractors and machines. I'm basically running everything the way the guy that sold it to me said, it just gets really hot really fast. I have an aftermarked overflow container on my 71 Bronco so I'll just take it off of that and put it on my tractor.

I suggested flushing and filling when I got it but the guy I bought it from said it didn't need it and I just went with that.

Again, thanks for the attention from you guys.






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 07-03-2007, 15:53 Post: 143416
kthompson



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 Agracat 254 runs hot

So did it run hot with him? Wonder why he said it did not need it? Wonder if he had suspecting the radiator was at least partly clogged and tried it, but had not worked for him? Let us know what you find. Have a great Independance Day






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Discussion Boards > Active Subjects > Messages as Posted > Jinma Farmpro Agracat Forum

Thread 143363 Filter by Poster:
candoarms 3 | earthwrks 3 | greg_g 3 | kleinchris 1 | kthompson 3 | MikeSMikeS 3 | Murf 2 | yofrient 5 |

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