Oil & Fuel Where are these fluids coming from?
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Your thermostat is under a two bolt flange right on top of the water pump. the top radiator hose attaches to the two bolt flange.
Before pulling it make sure your actually overheating. Is coolant actually boiling out of the system?
If you are certain it is over heating then the first test is to crank the tractor while cold, hold your hand on the upper radiator hose. When the engine reaches the thermostat set temperature you will feel that hose get hot rapidly. If it does that then the thermostat is likely working.
You can also pull the thermostat out, put it in a pan of water and set it on the stove. A cooking thermometer would be nice to observe the water temperature. You will be able to see it start opening around 160 to 180F. If not, it has a problem.
Before pulling it make sure your actually overheating. Is coolant actually boiling out of the system?
If you are certain it is over heating then the first test is to crank the tractor while cold, hold your hand on the upper radiator hose. When the engine reaches the thermostat set temperature you will feel that hose get hot rapidly. If it does that then the thermostat is likely working.
You can also pull the thermostat out, put it in a pan of water and set it on the stove. A cooking thermometer would be nice to observe the water temperature. You will be able to see it start opening around 160 to 180F. If not, it has a problem.
Okay, I removed (what I hope is) the thermostat:
To answer your earlier questions: No, I'm not sure it's overheating. Nothing is coming out of the radiator, except the (what I think is) normal overflow into the clear plastic tank on the right side. The fluid level is between the "full" and "low" marks; nothing is leaking out of that tank, either.
Moving the thermostat from the pan of boiling water to cold water from the tap doesn't appear to have any effect; I'm not sure what I'm looking for, but unless it's a very tiny change indeed, nothing seems to be happening.
EDIT: Might have a problem...the part I removed (which was under the two-bolt flange where the top radiator hose connects) looks NOTHING like the thermostat on Hoye's website. I wonder what I removed and boiled?
To answer your earlier questions: No, I'm not sure it's overheating. Nothing is coming out of the radiator, except the (what I think is) normal overflow into the clear plastic tank on the right side. The fluid level is between the "full" and "low" marks; nothing is leaking out of that tank, either.
Moving the thermostat from the pan of boiling water to cold water from the tap doesn't appear to have any effect; I'm not sure what I'm looking for, but unless it's a very tiny change indeed, nothing seems to be happening.
EDIT: Might have a problem...the part I removed (which was under the two-bolt flange where the top radiator hose connects) looks NOTHING like the thermostat on Hoye's website. I wonder what I removed and boiled?
Well, I'm out here again and frankly I can't figure out what to unbolt to remove the flange. There are 3 bolts on the aft face of the flange that look nearly impossible to remove. There are a couple on the front that are similarly difficult to get to. It looks like I'll have to disassemble half the engine to remove that flange.
I'm going to try your "hand on the hose" trick and see what happens. Stand by.
I'm going to try your "hand on the hose" trick and see what happens. Stand by.
clemsonfor
Super Member
this
this
this
this
water temperature in the block
does it have a thermostat?
clemsonfor
Super Member
that sounds normal. It will be to hot to touch for more than a few seconds. If it cools back down and you can feel the difference i am sure its not overheating. You need to get a new gauge you trust for it.
No way the top hose is that hot. I can rest my hand on it for several seconds at a time. Hard to tell if water is getting pushed into the overflow; there's so much vibration I can't tell if it's overflow water or just bubbles from all the shaking. I'll pull the hose out next time I'm over there and see what happens.
the part number for a new sensor in the FX24D parts manual is 124250-49351. when I look that number up on Hoye's sight it shows to be one for a warning light instead of a gauge. "If" you decide to spend the $22 + shipping for a new sensor be sure and question them about being the correct one for your FX24D.
I think one - or both - of us is confused. My current problem (I think) is that the temperature gauge on the dashboard is redlining after just a few minutes of run time. When I read your post above, I thought you were talking about replacing a sensor for a warning light - which isn't, as far as I know, one of my current problems. Are you saying I need to replace the sensor anyway?
Your temperature gauge has a sensor, that is what I am talking about. I do not know whether it is bad or not. Just going by all your posts it would seem your engine may not be over heating. Therefore you could be getting a false gauge reading because of a bad sensor. Not being there and being confused by the type written conversation I just don't want to cause you to spend money on something not needed.
I spent a couple of hours out there today doing some light work with the tractor. I waited until the temperature gauge had redlined and then stuck my thermometer into the radiator overflow tank. Temperature was right around 165F. No water was coming out of the overflow hose into the tank. I assumed all was well and went about my business.
After an hour, hour-and-a-half, I throttled back to slow idle to let her cool down before I quit for the day. I spent a few minutes picking up some trash, grabbed a bottle of water, etc. - was gone no more than 5 or 6 minutes. When I went back out to shut her down and head home, it was sputtering a little and the radiator was steaming. Turns out the overflow hose had come detached at the radiator end. I quickly shut it down, and then pushed the overflow hose back onto the radiator end-nipple before I headed home for the day.
I would've measured the overflow tank water temp again, but somewhere during my day's work I dropped the thermometer and couldn't find it again. Thoughts:
After an hour, hour-and-a-half, I throttled back to slow idle to let her cool down before I quit for the day. I spent a few minutes picking up some trash, grabbed a bottle of water, etc. - was gone no more than 5 or 6 minutes. When I went back out to shut her down and head home, it was sputtering a little and the radiator was steaming. Turns out the overflow hose had come detached at the radiator end. I quickly shut it down, and then pushed the overflow hose back onto the radiator end-nipple before I headed home for the day.
I would've measured the overflow tank water temp again, but somewhere during my day's work I dropped the thermometer and couldn't find it again. Thoughts:
- Could the overflow hose be blocked?
- If not, why would it suddenly come loose?
- I still don't know if the tractor is *actually* overheating or not.
- I'm leaning toward replacing the temp sensor 1st, because it's cheap and easy to get to.
- If that doesn't solve the problem, I guess the thermostat will be next?
Great! You have no idea how scared I was that you were going to say, "That was your block melting," or something similarly bad. When I go back out there tomorrow (being between jobs does have its advantages), I'll make sure the hose is unobstructed, and then put a new hose clamp on it.
Is 165F about right for the water temp?
Is 165F about right for the water temp?
A-HA! Somehow I missed this when you posted it originally. I did, in fact, take the top two bolts off the two-bolt flange and remove it (those are the only two bolts I can actually reach). I *could* be misremembering, but I am almost 100% sure there was NO thermostat down inside there when I pulled the hose+flange aside. (I didn't think to look up into the flange.)
This may be a stupid question, but will it be obvious if it's there? It won't be way down in side the water pump?
EDIT: Okay, well, quoting loses some of its impact when it doesn't include the attachment in the original post. This was the post where you posted the page from the exploded parts diagram showing where the thermostat should be.
