Our youth association has several Kubota tractors we use for mowing and working baseball fields. We utilize volunteer parent/coaches to maintain fields. I need a temperature cut off switch I can add to our Kubota TG1860, B2400 and BX2230 tractors to prevent overheating an engine. We are replacing the engine in the BX2230 because a coach ran it hot till it quit. Any suggestions?
overtemp cutoff
- Thread starter bvyaprez
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Mace Canute
Elite Member
Ditto.
Soundguy
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hmm... sounds like a maintenance issue.. ( as well as an operator issue... IE.. an op should be able to read a gauge or see a lamp ).. on the other hand... it's darn hard to overheat a machine.. I've got 15 tractors... i've never overheated one of them.
not too hard.. keep the cooling system clean and flushed as needed.. clean the rad.. keep coolant in it.. etc.
if any of these are key-on machines.. look into a murphy switch gauge..
not a perfect fix.. I don't want a machine running full out working hard to 'stall' when a gauge hits a magic number.. then let my turbocharger cook from no cooldown period. perhaps have the switch gauge actuate something annowing and attention getting via relay.. like a horn or flashing lamp that can't be avoided..
soundguy
not too hard.. keep the cooling system clean and flushed as needed.. clean the rad.. keep coolant in it.. etc.
if any of these are key-on machines.. look into a murphy switch gauge..
not a perfect fix.. I don't want a machine running full out working hard to 'stall' when a gauge hits a magic number.. then let my turbocharger cook from no cooldown period. perhaps have the switch gauge actuate something annowing and attention getting via relay.. like a horn or flashing lamp that can't be avoided..
soundguy
Farmerford
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Murphy, as suggested by Soundguy, is an old time maker of such controls for unattended engines, but they are expensive and I don't think they sell direct or on line.
eqauges.com has "temperature switches" that close at various temperatures between about 200 deg F and 250 deg F at very reasonable prices. Use a relay to either open the key/run circuit and stop the engine or sound a loud horn or light a bright light.
The switches are all (I think) NPT threads and the Kubota ports are probably British Pipe Thread. But McMaster Carr has adapters.
I did this on a Kubota Grand L 4330 that was prone to overheating so that I could trust other family members to use it.
Hint: In selecting the activating temperature, look at the shop manual or take a direct reading on the thermostat housing with an infrared thermometer to determine the maximum safe temperture for the engine. If I recall correctly, the Kubota 4330 could safely operate at about 240 deg F, so a 220 deg F switch would be triggered frequently. I used a 230 deg F switch to sound a loud horn with a small margin of safety.
eqauges.com has "temperature switches" that close at various temperatures between about 200 deg F and 250 deg F at very reasonable prices. Use a relay to either open the key/run circuit and stop the engine or sound a loud horn or light a bright light.
The switches are all (I think) NPT threads and the Kubota ports are probably British Pipe Thread. But McMaster Carr has adapters.
I did this on a Kubota Grand L 4330 that was prone to overheating so that I could trust other family members to use it.
Hint: In selecting the activating temperature, look at the shop manual or take a direct reading on the thermostat housing with an infrared thermometer to determine the maximum safe temperture for the engine. If I recall correctly, the Kubota 4330 could safely operate at about 240 deg F, so a 220 deg F switch would be triggered frequently. I used a 230 deg F switch to sound a loud horn with a small margin of safety.
RickB
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I'm willing to bet the radiator was plugged with debris when the coach (who had to be inattentive as well) climbed on the tractor. Murphy is indeed online
FW Murphy - Panel Systems (Mechanical Engines)
And sells a wide variety of shutdown equipment through a large number of retailers who can also be found online. I have spec'ed out a couple of systems; they can be bought and installed for less than one might think. Starting out with an engine with an electric rather than a manual fuel shutoff reduces cost significantly.
Soundguy
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napa even carrier murphy switch gauges. at work we use them on some equipment.. low op shutdowns.. etc..
soundguy
soundguy
David_Kb7uns
Veteran Member
Think I read someplace here a few weeks ago somebody found that their F series Kubota had a horn hooked up to an overtemp switch, would be simple and get your attention. I think the worst thing to do is shut down an overtemp engine wtihout a cool down time. Get a 95+db piezo buzzer and try that.
David Kb7uns
David Kb7uns
Thomas
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Not sure if Kubota still offer radiator cap that would make high pitch noise when hot..B7100 had such thing.
