rtv 1100 cooling

Why not just hook a manual switch on the fan, and just "flip" it on when you need it ...

For mine has not ever overheated, the fan cycles like it suppose to. But, if my thermo switch on the fan ever went out, I would hook my fan up directly.
 
If you are overheating and adding coolant and cannot find anything leaking, i would pressure test the system with a tester that can reach 15 psi, then your engine is eating coolant and out the tail pipe it goes.
 
Just picked up from dealer this am. he changed the rad cap and housing (the mid one)), reinstalled thermostat, flushed rad and installed antifreeze mix. I run down to store and back reaching mid way on gage but with a 52 deg day could not tell. I did seem to notice a quicker cool back when fan came on - was that cooler ambient or an improvement ?? Will be next summer for answer. Come back when ever you have more. Thanks Roger
 
Roger, We use 2 model 1100 and 1 model 900 in our business. We have had cooling problems with both of our 1100 both have overheated without warning. We have tried all of suggestions previously posted and they have not cured the problem on either 1100. My dealer has gone out of his way to help and he has had kubota rep here several times to help. We have had to overhall at least 3 1100 engins. We have also had radiators melt. The rep suggested we install a seprate temp gauge on both 1100. We also installed additional small radiator, to help the factory radiator, on our back window on our cab. This help, it prevented us from overheating the engins. We felt that we still had problem and our dealer designed a setup where we removed the factor radiator and installed a radiator on top of the 1100 cab. We also installed a additional radiator to cool the tran oil. This was done about 2 year and we have had no problems with the 1100 since. This unit runs with track all the time and has run for 5 to 6 hours a day in outside temp exceding 100 with no problem. This 1100 is also equiped with turbocharger. The pictures attached shows the 1100 with both radiator on the unit but the small unite is not connected. We also inted to install a radiator on the cab of our other 1100 and remov the factory radiator.
 

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I think these things have a very sensitive cooling system relying on one thing, the fan switch. with fan running it will be hard pressed to get these things to even come up to temp. It makes that big of a difference. the fan switch is the control of where the temp guage stays. I have 2 black dots over where the needle moves to where fan kicks on(1/3) and kicks off(1/4). I can not get it over the 1/3 mark running it hard. If anyone is having issue try and change the switch out. these things can go bad or even maufactured out of sync.
 
jbiglane said:
Roger, We use 2 model 1100 and 1 model 900 in our business. We have had cooling problems with both of our 1100 both have overheated without warning. We have tried all of suggestions previously posted and they have not cured the problem on either 1100. My dealer has gone out of his way to help and he has had kubota rep here several times to help. We have had to overhall at least 3 1100 engins. We have also had radiators melt. The rep suggested we install a seprate temp gauge on both 1100. We also installed additional small radiator, to help the factory radiator, on our back window on our cab. This help, it prevented us from overheating the engins. We felt that we still had problem and our dealer designed a setup where we removed the factor radiator and installed a radiator on top of the 1100 cab. We also installed a additional radiator to cool the tran oil. This was done about 2 year and we have had no problems with the 1100 since. This unit runs with track all the time and has run for 5 to 6 hours a day in outside temp exceding 100 with no problem. This 1100 is also equiped with turbocharger. The pictures attached shows the 1100 with both radiator on the unit but the small unite is not connected. We also inted to install a radiator on the cab of our other 1100 and remov the factory radiator.
Click to expand...

wow, wheres the 50 cal go.:14_6_12: Nice set up. does the tracks make more hydraulic heat? what temps do you see?
 
I have talked to many people in my area that have Kubota stuff and all have complained on cooling issues over time.I have the 900 and have had no problem but did take thier advice right off the Bat.All of them told me that the original Kubota fluid was junk and either clogged their radiator with in 1 year .All have replaced their radiators here due to it.
I drained the original fluid and installed new coolant and have had no issues.Mine is going on 8 years old now and have had no cooling issues.JUst some info if it helps.
 
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