Kubota coolant temperature sensor

Kubota coolant temperature sensor

G Temp Sender Location? I'm getting the oveheat indicator flashing on the front panel after about 20 mins of mowing - but the mower is not obviously overheated. I'm wondering if the sendor is bad or if maybe the thermostat isn't opening up completely perhaps leading to higher temps in the engine block than the radiator or perhaps a blockage in the block. Does anyone know if the temp sender is measuring the coolant temp and if so where?

If I knew exactly where the sender is and what it is measuring I could draw some conclusions Thanks much for any tips, Mike. Re: G Temp Sender Location? No one on this board has any ideas where the temp sender is located or specifically what the overhead light is measuring? VIP Service Tech. Why do you say it's not obviously overheating? Have you taken a manual temp reading?

While it may not be blowing water out of the radiator overflow it could be overheating internally, and ignoring that could cost you huge if it hasn't already. The temp sender is under the thermostat housing. If the water pump is bad, if the thermostat is stuck or if it has a other issues, it could really be overheating. First thing to do would be to pull the temp sending unit and get a reading on it, you will need to get a service manual to be able to tell what the readings should be for it to be working right.

Thank you for your response "Wolfman". This is a big help - as I previously mentioned, the radiator coolent only registers degs when the sender indicates an over-heat situation. Now that I understand where the sender is actually measuring temps at, I can see that it could be measuring higher temps in the engine block than the coolent in the radiator if the thermostat was only partially opening.

Last edited by Mike B; at PM. Just a followup for other's future reference. Yes, the Temp Sensor is located on the right-hand side of the Thermostat housing just below the level of the thermostat. When I screwed out the old one, I noticed that the head of it was short and squared off I screwed in the new sensor and problem was resolved Isn't the first bad temp sensor in the world, won't be the last. A quick way to check is to get an inexpensive IR thermal reader.

Point and shoot at several engine points. If any water flowing components radiator, hoses, etc. Yep, that's exactly what I did - measured the rad and hosing with an IR Therm and the reading seemed fine. I wouldn't think coolent flow could do that Thread Tools. All times are GMT The time now is PM.This article is the third in a series that covers off some basic servicing procedures for your Kubota.

Earlier articles covered air and fuel systems. Radiator Cap Your Kubota is designed to operate with a pressurized cooling system, same as you typically find on a car or truck. Check the cap — it should be rated for 12 to 15 lbs of pressure. If you have a coolant pressure testing system, pressurize the cap and see that it holds at the indicated pressure. If it slowly drops, then replace the cap. If the gasket is torn, or as is often the case, chipped, replace it. These screens are discreet and often just look like part of the radiator which explains why they are often not removed and cleaned.

The fine screening is designed to keep debris out of the radiator fins and its this screen that needs periodic cleaning and blowing out, particularly if you do a lot of mowing or rough cutting. The newer BX models are designed with the radiator mounted more mid-tractor and the fan blades direct air back through the radiator. To clean this screen, find the hold down bolts, loosen them off and withdraw the screen and frame. Using some air pressure, blow the screen out and blow off the exposed front of the radiator fins then reinstall.

Hoses What we are looking for when it comes to hoses is feeling around for any softness or mushiness — a weak hose. Push your thumb into the middle of the upper and lower hoses feeling for softness. The lower hose may have a coiled spring inside it, so workaround that.

Twist and pull on the hoses slightly where they are held in place by the hose clamp. Any tearing? Do you hear ripping? Test rad hoses by feeling for soft spots, twistly slightly and looking for tears or listening to ripping. The hoses in general should feel supple, yet firm. They should not have bulges or soft spots. If they look original and the tractor is 10 years old, replace them. Get down on the shop floor and look up from the underside of the radiator if your tractor has a drain petcock on the right hand side of the frame.

Chances are there is a hose running along the inside of the frame rails from the left hand bottom side of the radiator to the back side of that drain petcock. Those who own an L, L, L gray market Kubota will know how difficult this little hose can be to change out! Seems like Kubota had a hose and then built a tractor around it. Belts, Thermostat and Water Pump The fan belt is a fairly easy check over.

Push down in the center of the belt to measure deflection. Tight, no slack.

Roll the belt over and check the v-groove side for cracking and glazing. The belts should be replaced if you notice fraying, cracks or excessive glazing.

If it makes noise when the tractor is running, replace it as well. The belt is hard to get to so we are using a socket extension to test its deflection.

kubota coolant temperature sensor

Shut down and investigate ASAP! Rad Fins, Body, Fan Shroud and Blade Visual inspections here can really save on expensive repairs and down time and take only a few moments once or twice a season. When blowing out the mesh screen from the earlier step, also blow out the radiator fins.The coolant temperature sensor is what tells the car's computer what the engine's running temperature is.

This will then translate to how the engine runs. Before the automated systems in vehicles, this was the sole purpose of the temperature sensor. Now, with this special sensor, the engine will adjust itself so that it runs smoothly even on the coldest days and does not overheat once the temperature rises. Testing this coolant temperature sensor, and then replacing it if needed, is a very easy process. The coolant temperature sensor is located on the engine block under the hood.

Pull the latch for the hood and open it, making sure it is secure before letting go. You will search for the sensor within the engine block itself, using a drop light if you need help to see it better. Look at the front of the engine block in the middle of the pulleys.

You will see a small terminal sticking out of the block with a wire lead coming from it. This is your coolant temperature sensor. Testing the coolant temperature sensor is a very quick process. With the use of a digital volt-ohm meter you can easily tell if the sensor is faulty or not. Connect the black lead of the digital ohm meter to a solid grounding. This can be any solid piece of metal.

Next, remove the wire from sensor terminal and connect the red lead to the terminal end of the coolant temperature sensor. Before turning the meter on, set the digital reading to the 20K range. For the testing process you will need to turn the engine on. Let the engine run for a full two minutes to allow the engine to get up to running temperature.

While the engine is running you need to be continually checking the digital ohm meter. You are looking for readings that are more than ohms in variance between a cold and warm engine.

Kubota: Water Temp. Sender Switch, Part # 31351-32830

If you do not see anything that is more than ohms in difference, the coolant temperature sensor is defective and will need to be replaced. If you have a new sensor on hand and want to check it, you can do this easy test. Connect the black lead of the meter to the body of the cold sensor and the red to the terminal.

You should have a reading of approximately ohms. Check the warm sensor in your engine.Dan Ferrell writes about do-it-yourself car maintenance and repair. He has certifications in automation and control technology. The engine coolant temperature ECT sensor test is simple and can help you fix your car faster. You can do it at home using a digital multimeter and a cooking thermometer. A bad engine coolant temperature sensor affects engine performance:. But before you blame the coolant temperature sensor for your engine problems, though, use this guide to test the sensor to confirm that you actually need to replace it.

The test only takes a few minutes. If you still have trouble locating the ECT sensor, consult your vehicle service manual. You can buy a service manual for your particular car make and model in most auto parts stores or online. Check the Amazon ad below. Get the engine surface temperature using an infrared thermometer or suitable cooking thermometer. Take the engine temperature on a location near the coolant temperature sensor. Okay, at this point you may be wondering why you need to take the engine temperature to troubleshoot the sensor.

The main reason is that you are trying to check two common, potential failures here, the ECT sensor and the thermostat. Let's say that the thermostat on your vehicle got stuck in the open position.

This will not allow the engine to reach operating temperature because the coolant is flowing continuously. If you were to test the coolant temperature sensor alone, you may think that it failed because its resistance value has remained at about or ohms, for example, when in fact the sensor is reporting the coolant actual temperature and it's working properly.

You could relay on the temperature gauge on your dashboard. However, on some vehicle models this gauge works through the ECT sensor as well. So, if the sensor doesn't work properly, your temperature gauge won't be of much help either. By using the thermometer, it won't take you long to figure out that the thermostat isn't working. You'll notice the engine's temperature is not rising above 85 or 90 degrees, for example.

On the other hand, if the thermostat works fine, the engine temperature will reach about F 93C and will drop afterwards as the thermostat opens.

kubota coolant temperature sensor

So you eliminate the thermostat as another possible failure. Now, using your ohmmeter, measure the resistance value of the coolant temperature sensor by hooking up one of the meter's leads to one of the terminals on the sensor electrical connector, and the other lead to the other terminal on the sensor electrical connector. On vehicles with old, single-wire sensors, hook up the meter leads to the terminal on the connector and the sensor's body ground to take your reading.

Check your vehicle service manual for the correct resistance value for your ECT sensor. However, not all service manuals have this information. Most sensors of this type have a resistance value of ohms or more at about 55F 13C. You may want to try searching online for a resistance value table for your particular ECT sensor, if you know your sensor's brand. However, whether you find the resistance values for your particular ECT sensor, continue with this tests anyway, the sensor's behavior and the temperature readings may give you a clue to its operating condition.

Set the transmission to Neutral and apply the parking brakes. Wait for about one to two minutes and measure the engine temperature and the sensor's resistance as you did before. Without turning off the engine, wait for about one to two minutes and repeat this process again. Take another pair of readings in about one to two minutes again, always noting the value readings.

On the next video, you'll see an alternative method to test a sensor using water.Most coolant temperature sensors operate using electrical resistance to measure the temperature of the coolant.

The computer will also scale back engine performance settings if it detects that the engine temperature is too high, in order to protect the engine from possible damage due to overheating. Because temperature plays such a vital role in engine performance calculations, any problem with the coolant temperature sensor can quickly translate into an engine performance issues. Usually a problem with the coolant temperature sensor will cause a few symptoms that alert the driver of a potential problem that should be thoroughly inspected.

One of the first symptoms associated with a problem with the coolant temperature sensor is poor fuel economy. If the coolant temperature sensor goes bad it can send a false signal to the computer and throw off the fuel and timing calculations.

It is not uncommon for the coolant temperature sensor to fail and send a permanently cold signal to the computer. This will cause the computer to think the engine is cold, even when it is not, and as a result will use more fuel than necessary.

This will reduce fuel economyand may hinder engine performance. If the coolant temperature sensor fails and sends a cold signal to the computer, this can confuse the computer and cause it to unnecessarily enrich the fuel mixture. If the fuel mixture becomes excessively rich to the point where the fuel cannot be adequately burned in the combustion chamber, it will burn up in the exhaust pipes and cause black smoke.

In severe cases, the black smoke may be considerable enough to warrant not driving the vehicle. Another symptom of a problem with the coolant temperature sensor is an overheating engine. The coolant temperature sensor can also fail in a manner that causes it to send a permanently hot signal. This can cause the computer to incorrectly compensate for a lean signal, which can result in overheating, and even misfires or engine ping. An illuminated Check Engine Light is another symptom of a potential problem with the coolant temperature sensor.

The Check Engine Light will remain on until the issue is addressed. The coolant temperature sensor is one of the most important engine management sensors, as its reading plays a key role in calculations which affect engine performance. For this reason, if you suspect that your coolant temperature sensor is having an issue, have the vehicle inspected by a professional technician from YourMechanic. They will be able to diagnose your vehicle and determine if you need a coolant temperature switch replacement.

The most popular service booked by readers of this article is Vehicle Engine Electrical Inspection. Our certified mobile mechanics make house calls in over 2, U. Fast, free online quotes for your car repair. Schedule Vehicle Engine Electrical Inspection. Service Area. Average rating fromcustomers who received a Vehicle Engine Electrical Inspection.

Poor fuel economy One of the first symptoms associated with a problem with the coolant temperature sensor is poor fuel economy. Overheating engine Another symptom of a problem with the coolant temperature sensor is an overheating engine. Check Engine Light comes on An illuminated Check Engine Light is another symptom of a potential problem with the coolant temperature sensor.

Home Articles.Forum Rules. Home Forums Reviews Articles Store. Homepage Today's Posts Search Register. Forgot your Password? Sign Up. Remember Me? Page 1 of 2 1 2 Last Jump to page: Results 1 to 10 of Having just installed a set of gauges oil press.

If anyone knows, I'm probably not the only one who'd appreciate finding out. Seems to run atwhich doesn't worry me, but is that on the cool side for a diesel? Reply With Quote.

Kubota: Water Temp. Sensor, Part # 32330-32830

Re: normal coolant temperature? I think you just answered your own question as to what's normal for that machine. Since emissions doesn't play any part, Kubota doesn't need to run a high coolant temp. FWIW, diesel engined vehicles which use the engine coolant for running a heater seldom put out enough heat. Years ago I added a turbo to a diesel and saw the coolant temp drop.

I would never have expected that. The truck was miserable to drive in the winter. Never could get enough heat and adding the turbo made it worse. Lots of power though. I am running a 22hp with a cab heater that adds to the heat transfer and I seldom see the heat gauge get a bit above the cold mark. I thought the temp. However in the heat of the summer when going up a long hill on the way to the woodlot the temp gauge moves about a needles width higher.

kubota coolant temperature sensor

I aways wondered what the operating temp. Varmint, got any pics of your guage installation? I just bought an oil pressure and water temp guage for my B Have not yet decided where they will fit though. Any ideas? I must confess that I was pleased with how the installation turned out- being "retired" I have entirely too much time to play with these things much to my wife's consternation, who has better things for me to be doing and I spent a fair amount of time crafting an aluminum sheetmetal "console" to go just under the regular dash panel.

Painted it to match the dark gray tractor frame.Forum Rules. Home Forums Reviews Articles Store. Homepage Today's Posts Search Register. Forgot your Password? Sign Up. Remember Me? Results 1 to 10 of Temp sending unit vs Temp gauge? On my B the temp gauge has been reading very low for a long time. Finally I decided it was time to fix it. I shorted the lead to ground going to the gauge at the sending unit and it pegged the meter. So I ordered a new sending unit. I ordered one on ebay. It was listed as OEM.

When I got it, the OEM packaging was restapled and it looked like sealant was on the threads and then removed by threading it in. It was not worth bitching about, especially if it worked. I installed and it does the exact same thing. After running the tractor for 20 minutes, moderate use on a cool 50F day. It just barely gets off the Cold mark. Should I try another sending unit?

Or look into replacing the gauge.

kubota coolant temperature sensor

I really want to be sure it's the gauge becore pulling apart the dashboard. The engine doesn't seem very hot. Is it possibly a thermostat stuck open? Reply With Quote. Re: Temp sending unit vs Temp gauge? My B runs very cool I hooked up the old uninstalled sending unit to the gauge and grounded the base The tractor just runs cool Slash Pine blunt and succinct yet sincere I don't suffer fools gladly Put an ohmmeter on the sending unit s.

Unfortunately, I don't know the exact numbers for your sending unit but IN GENERAL, at room temp the ohms should be several hundred or more and in a pot of boiling water should be around ish. If you know the manufacturer of your sending unit, an internet search should give you exact numbers. These engines run cool. Normally my B's gauge reads at the top of the C.

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