Kubota L4310 HST with Cab is regularly HOT: Kubota Review  -- Kubota Tractors Discussion Forum and Review Kubota L4310 HST with Cab is regularly HOT: Kubota Review -- Kubota Tractors Discussion Forum

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 04-17-2002, 23:22 Post: 37570
HardWorker
2002-04-17 23:22:52
Post: 37570
 Kubota L4310 HST with Cab is regularly HOT

I was curious if anyone out there has the L4310 HST with the cab? The A/C will not cool properly and the tractor overheats as well. Brand new. It seems that the HST heat exchanger, the AC, the radiator and the battery are all jammed into the same small area and expected to be cooled. Doesn't work with much stress or high ambient air temp. Anyone in the same boat?






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 04-18-2002, 04:30 Post: 37571
Bird Senter

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 Kubota L4310 HST with Cab is regularly HOT

HardWorker, I've no personal experience with cab Kubotas, but the only time I've heard of such a problem was an M6800, and the mechanics found that the only problem was debris in the front end from dust, seed, etc. that accumulated there while he was cutting hay and mowing pastures. The solution was simply washing it out, and the AC worked fine again.






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 04-18-2002, 05:53 Post: 37575
TomG

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 Kubota L4310 HST with Cab is regularly HOT

You'd sure think that a tractor that's designed to use an air-conditioned cab would be adequately engineered to accommodate the heat load. If not, it's probably cause for grumbling to dealer etc.. It's possible that a simple deflector could be designed to get some heat out of the engine compartment.

On the other hand, it's possible that the situation is that both the engine and HST are running a bit hot during a break-in period. Perhaps everything will run better after the tractor has a few hours. I also recall and old discussion about whether HST's run cooler on synthetic fluid. I don't remember a conclusion from that discussion, but it may be possible to reduce the heat load by using a different hydraulic fluid.






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 04-18-2002, 06:24 Post: 37578
Roy Jackson



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 Kubota L4310 HST with Cab is regularly HOT

"The A/C will not cool properly and the tractor overheats as well. Brand new. It seems that the HST heat exchanger, the AC, the radiator and the battery are all jammed into the same small area and expected to be cooled."

"the mechanics found that the only problem was debris in the front end from dust, seed, etc. that accumulated there while he was cutting hay and mowing pastures."


The manual for my Deere specifically mentions keeping the radiator and grill clean and clear of debris.
I've not had any problems with the tractor overheating, but a friend of mine (also with a Deere) has had to clean off the affected areas during brush hogging.

I do hit the radiator and grill areas with a hose (air or water) after each use. If you're not doing that...you might want to start. You might also keep a small still brush in the cab so you can brush off any clogging debris as you work.

A car doesn't depend on the grill at road speeds...much of the cooling air comes up from underneath the car (also, road speeds reduce the need for the fan). Our tractors run at very low velocities, thus increasing the importance of a clear path for cooling air flows.






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 04-18-2002, 06:26 Post: 37579
Roy Jackson



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 Kubota L4310 HST with Cab is regularly HOT

"...small still brush ..."

That should have been small STIFF BRISTLED BRUSH.






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 04-18-2002, 07:12 Post: 37582
Morgan Wright
2002-04-18 00:00:00
Post: 37582
 Kubota L4310 HST with Cab is regularly HOT

The first time my Kubota overheated from a clogged grill I looked around to see who was honking at me. There was nobody for miles around, I thought I was hearing things.

My boat does the same thing...the horn honks if it overheats. Very weird.






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 04-18-2002, 07:19 Post: 37583
Roy Jackson



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 Kubota L4310 HST with Cab is regularly HOT

"The first time my Kubota overheated from a clogged grill I looked around to see who was honking at me. There was nobody for miles around, I thought I was hearing things.

My boat does the same thing...the horn honks if it overheats. Very weird."

Well, might be weird, but it saved your engine...and a lot of money.
I take it your Kubota and boat don't have temperature gages?






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 10-02-2002, 23:31 Post: 43265
ht
2002-10-02 00:00:00
Post: 43265
 Kubota L4310 HST with Cab is regularly HOT

Did you ever get the overheating problem resolved? I'm looking to purcase the same model and it gets very hot around here during the summer.






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 10-03-2002, 07:21 Post: 43276
Charlton2
2002-10-03 00:00:00
Post: 43276
 Kubota L4310 HST with Cab is regularly HOT

I have a 2000 3710, A/C is cold. The fan blower could use a little more power but it has been adequate. I have used it for two summers.

Have you taken a reading as to the temp of the air coming out of the vent? I will check mine this weekend and let you know.

Dave






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 10-03-2002, 07:35 Post: 43278
Art White



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 Kubota L4310 HST with Cab is regularly HOT

Many tractor companies pile all the cooling with the batteries and the air conditioner together up front as that is the coolest temp available for the tractor to cool with. We have many of those cab tractors out and we have not had a problem with them when the front is kept clean.






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