Kubota overheating

[Smokeydog]

Works great. Works cleaning air filters too. Also use for blowing off the dust and debris on the tractors and equipment. Even use it to sweep dirt out the shop floor. Use the water wand to flush external fins. Wash equipment. Lasted several years now. First saw and cheaper at the local Kubota dealer many years ago.

 

[SKELLER02]

Check the cap too.

 

[Sidney71]

While removing the radiator and flushing it out may be the answer I would install a new thermostat and change out the suction hose on the tractor. The hose may be collapsing a little and you may not be getting the flow rate needed to cool - the new thermostat because the engine was designed to run with one .

 

[Railroadman1]

If your radiator is really clean a can see through it like a screen,,, also have the correct coolant mix & check the cap

 

[kpsp50]

Sounds to me that you're radiator is clogged take the radiator out take it to a radiator shop let them flush it out core it and get it back should only cost you around $100 or so once you get it back fill it up with antifreeze and distilled water do not use tap water tap water has calcium and other particles in it that will clog it up again good luck

 

[lpakiz]

I worked in a truck shop way back when. Put a trouble light in behind the radiator, by the fan blades. Best done indoors or on a cloudy day so the ambient light isn’t too bright.
Then go to the front and look thru the radiator. If it’s clean, you’ll see lots of light thru the fins.
In second place is a loose belt. Grab a fan blade and try to rotate it, both directions. If you can turn the fan without turning the motor, the belt isn’t gripping.
Also, if the fan belt IS gripping, you will hear a distinct roar or buzz when at WOT. Just feeling “some” air blowing thru the radiator isn’t good enough.

 

[tbergman]

I had the same problem on my Branson 4720H. I had rinsed with a water hose, but still overheating, so I complained to my dealer that the radiator seemed undersized...he was shocked and suggested strongly that I do a more thorough cleaning. I found a wand at Atwoods that fits the end of a water hose and lets you reach in behind the oil cooling radiator and blast the water at 90 degrees right into the fins of the radiator. That did the trick. It is the perfect tool for cleaning my radiators.

 

[Robert walker]

Radiator Genie - Water & Air Cleaning Wands for High Efficiency Cooling Systems and Radiators - Blow Out / Wash Out Kit Amazon.com: Radiator Genie - Water & Air Cleaning Wands for High Efficiency Cooling Systems and Radiators - Blow Out / Wash Out Kit : Automotive

Have to use radiator genie tools regularly to keep our radiators and oil coolers clean.

I looked at this and may order one. I always spray from the engine side of the mine, L3400DT but it’s hard to get to around the fan. I think if you spray from front you just push the dirt further into the radiator.

 

[lpakiz]

Robert,
Nope, ideally you must spray until the dirt is pushed completely THRU the radiator, one direction or the other. Ya gotta be able to see the trouble light all the way thru the rows of tubes in the radiator. Not a 5 minute job.
Best to remove any screens, oil coolers, AC condenser, etc and get directly to the radiator. Some equipment is set up that you can de mount the oil cooler or condenser and swing it to the side without unhooking hoses.
Maybe in some cases, it’s more efficient to pull the radiator, lean it against the picnic table bench or a tree and spray it out. Careful if you use a pressure washer, stay back several inches and keep the spray angle exactly 90* to the fins so you dont bend them.
You will be amazed how long that water keeps coming out green or brown until it finally runs clear.

 

[NUTTERDW]

My Kubota L3000dt is overheating when I run my shredder via the PTO. I have checked the coolant, cleaned the radiator/grille and pulled the thermostat and still overheating very quickly. Any ideas on next steps would be appreciated.

I'm not familiar with your model Kubota but I have a 1993 B1550HST That I have had the same problem with. I took it to my dealer and he determined that it only overheated when I ran the PTO. It seems my PTO has a hydrostatic drive and it is bad. when it gets hot it is bypassing the fluid. I tried adding another transmission cooler but that did not help. 4000$ just for the replacement unit so I'm living with it the way it is. That did not include the labor to install it. Mine will run about an hour until it gets hot enough and the engine looses power. Never blows any water out of the radiator. I tried everything you tried before i took it to the dealer. I moved it to my farm where I can usually finish mowing in an hour. I can use a water hose to cool the radiator and continue mowing.