What activates the electric fan on my 950 kubota, the relay or the temp sensor, stamped on the sensor it says 92-on. So I’m assuming it kicks fan on at 92 degrees,I’ve searched the entire internet and can’t find a Kubota temperature sensor, the motor has 2. I know one goes to my gauge which works the one that’s marked 92 goes to the fan relay. I ran 12 volts to the fan directly and is works fine. This has me baffled, I like to keep things original but can’t seen to figure this out, any trouble shooting ideas? I’m about to just hard wire the fan with a toggle switch and call it a day, 950 Kubota engine parts are hard to find
Cushman turf truckster with a Kubota D950
- Thread starter Jeff fisher
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85Hokie
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92 C ............ not 92 F
A fan would not come on at 92 F - 92 C is about 198 F...... which is where the fan SHOULD kick in.
What you do NOT want to do is cool the coolish engine = the idea temp of a working diesel is right at 200 ish F. Cooling it at a lower temperature is not desirable.
I work on a couple of Cushmans ....... they are all gas - one of them has a gauge that shows real close to the red line yet a laser thermometer says it is rather cool at 150 ish F at the thermostat
See IF you diesel is getting to a temperature close to 200 before bypassing the switch.
A fan would not come on at 92 F - 92 C is about 198 F...... which is where the fan SHOULD kick in.
What you do NOT want to do is cool the coolish engine = the idea temp of a working diesel is right at 200 ish F. Cooling it at a lower temperature is not desirable.
I work on a couple of Cushmans ....... they are all gas - one of them has a gauge that shows real close to the red line yet a laser thermometer says it is rather cool at 150 ish F at the thermostat
See IF you diesel is getting to a temperature close to 200 before bypassing the switch.
That's good to know I would think cooler is better go figure still have to locate a temperature sensor in that temp range
85Hokie
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Actually that is a misconception - much like babying a diesel engine. Always work a diesel never baby it.
AS for temp - a thermostat allows the engine to get to temp (160 F +) then opens slowly to allow coolant to flow to radiator.
Your school buses and big rigs up there in NY - in the winter, you notice they cover the grill to the radiator a bit? THIS is to keep the engine up to temp, a cold engine is bad in several ways.
Makes sense. Yes always wondered why the radiators were covered in winter,mabe I have a thermostat stuck and it’s not activating the sensor to the relay. Hmmm
85Hokie
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get one of these - 20 dollar item
great to see what is hot and what needs to be!
great to see what is hot and what needs to be!
Yes I have one great tool never thought of using it, use mine when I’m powder coating parts. Thank you
One of the handiest tools to have! Use it to see what cylinder is not firing. How the heating coils in the ceiling are working, is the AC condenser motor overheating, what is the temp at the AC registers, what's the temperature of the water coming out of the well .....
North Idaho Wolfman
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The part your looking for has nothing to do with Kubota or a D950.
That part is a Cushman supplied part, you would need a Cushman manual to get the right part.
It's a simple on off switch but what that switch controls is up to Cushman.
most of those style circuits have the temp switch control a relay that controls the fan.
Get a Cushman manual with the electrical schematic for the unit.
That part is a Cushman supplied part, you would need a Cushman manual to get the right part.
It's a simple on off switch but what that switch controls is up to Cushman.
most of those style circuits have the temp switch control a relay that controls the fan.
Get a Cushman manual with the electrical schematic for the unit.
North Idaho Wolfman
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Please hit reply and Type your reply after the Quote.
Have you tested the sensor?
Hook up a meter to the sensor and put it in boiling water, should "make" the circuit when temp gets high enough.
Does that sensor have one wire? If so, with the key on, touch the wire to ground. If the fan comes on, the sensor/switch is most likely bad. If the fan doesn't come on, the relay may be bad or the relay is not receiving power.
I had two liquid cooled Cushman truckster's years ago one had the Kubota diesel and the other was a gas engine. Both of them didn't turn the fan on until almost 200 degree's on the heat gauge. A lot of time in the winter the diesel wouldn't even turn the fan on unless your were running it down the road wide open. The cab heater took enough engine heat to keep the fan from turning on. Make your your engine is warming up. I had had the engine thermostat go bad and never heat the engine up.
Sounds interesting. I’m going to let it get to 205 degrees and see if it kicks on. Thanks for that info
North Idaho Wolfman
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Jeff I don't know what your doing but the double posts, one with a quote and one without, has got to stop.
Hit reply, do not hit post reply until you type below the quote what you want to say.
Just like below: