radios1 Thank you for your reply, My dealer just changed the thermostat yesterday, I talked to them about the water pump and all the other ideas given to me from all you great members here. A Big Thanks to all of you that have reached out and tried to help me with this problem. I am sure with all your help my dealer should get this problem fixed for me. Sincerely Sammie
Mahindra tractor over heating, Please Help
- Thread starter sammie
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DavesTractor
Elite Member
I'd shine a flashlight from inside the radiator shroud and then poke your head around in front of the radiator and make sure the light shines through 100% of the radiator fins. Helps if you are in a shop or it isn't real light out. Generally speaking folks with this issue will find the radiator clean on the outside but not able to pass air properly. The AC has to shed heat via the condenser. When it can't shed enough heat the pressures in the AC system get pretty high and will lock up the compressor. I would think this model has a high pressure switch which will cycle the compressor to shut off when the pressure is too high, but if it does that a bunch of times (like with a clogged radiator) it will eventually smoke the ac clutch. Sometimes it will smoke the belt first.
I think the fin spacing on the radiators is too close for some applications catching small stuff. Close spacing is very efficient in a laboratory, but if crud gets caught in the radiator it doesn't matter if it is a John Deere or a Caterpillar, it is going to get hot. I'm no engineer, but it seems like a radiator with wide fin spacing and a couple more rows of tubes would be the right way to go for this sort of application.
If in fact your radiator is truly clean and your AC condenser is also, then I am at a bit of a loss and the problem gets more complicated.
I think the fin spacing on the radiators is too close for some applications catching small stuff. Close spacing is very efficient in a laboratory, but if crud gets caught in the radiator it doesn't matter if it is a John Deere or a Caterpillar, it is going to get hot. I'm no engineer, but it seems like a radiator with wide fin spacing and a couple more rows of tubes would be the right way to go for this sort of application.
If in fact your radiator is truly clean and your AC condenser is also, then I am at a bit of a loss and the problem gets more complicated.
Dave Thank you sir for your help. You are right about making the radiator better and more efficient. If I knew someone who could do that I would have it done. Right now the dealer is replacing all the AC components like the switch, condenser, compressor and a couple other parts that were NOT replaced the last time on the second compressor was replaced less than a year ago. I hope this time it gets fixed right. Dave I Thank you again for your help. I been keeping all the information your great members have given me to help in me in the future. Have a great weekend. Sammie
Brian2665
New member
- Joined
- Sep 12, 2018
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- 13
- Tractor
- Mahindra 2665 cab
Make sure the condenser in front of the radiator is not plugged up with dust dirt. With the ac on the condenser creates a lot of heat and if there is no proper airflow it will cause over heating. Make sure it’s clean through and between the radiator. Blow air backwards through the radiator to make sure it isn’t plugged up.
DavesTractor
Elite Member
Not that it helps current owners, but the new 2660 and 2670 that Mahindra will soon have out will have a larger capacity air conditioner system. Hopefully it will have a radiator that passes little stuff through instead of catching it. I do not know any other details as to how they are accomplishing this.
I have a small orchard. For years we mowed it with an old Ford 4600 that was lowered and made into an orchard model. We never clogged the radiator. It was an old school less efficient style radiator with wide fin spacing. Little bits just passed through. While it was less efficient I am sure, it worked as designed as it allowed air to pass through every square inch. I have seen across most brands the current use of the more efficient close fin spacing radiators. In theory these newer radiators cool very well, but it is a chore to keep them clean. I wish they would leave those to the automotive world and give us old school radiators.
I have a small orchard. For years we mowed it with an old Ford 4600 that was lowered and made into an orchard model. We never clogged the radiator. It was an old school less efficient style radiator with wide fin spacing. Little bits just passed through. While it was less efficient I am sure, it worked as designed as it allowed air to pass through every square inch. I have seen across most brands the current use of the more efficient close fin spacing radiators. In theory these newer radiators cool very well, but it is a chore to keep them clean. I wish they would leave those to the automotive world and give us old school radiators.
DavesTractor
Elite Member
Probably the new system won't retrofit, and for sure even if it did Mahindra would not pay for the upgrade. Just like cars and trucks, improvements are made year over year. I think if it was my tractor and I knew I'd be mowing with a big mower in hot conditions often, I'd look into having a mega radiator made and also look into a condenser that doesn't catch chaff so badly. If your radiator stays cool and your condenser does it's job, the head pressure will not spike and the compressor will operate in a pressure range for which it's happy and will last for many, many years. Cycling on and off due to high head pressure (due to heat) shortens the compressors life.
So I have been openly critical of the cooling system. But let me say we have sold a ton of these tractors and most folks do not have an application where they are over heating and eating AC compressors. We occasionally hear from folks saying the wish it would cool the cab down further. For them we suggest tint on the windows in our 115 degree heat. But guys that are mowing in real hot conditions create the chaff that fills the radiator fins and that is where we see some issues. Even then it depends on what you are mowing.
I'm no AC expert, but that is what I have gleaned over the years. And it might be you have something else going on. I just needs to get up on my "radiator not passing airflow" soapbox every once in a while since it is such a common problem.
So I have been openly critical of the cooling system. But let me say we have sold a ton of these tractors and most folks do not have an application where they are over heating and eating AC compressors. We occasionally hear from folks saying the wish it would cool the cab down further. For them we suggest tint on the windows in our 115 degree heat. But guys that are mowing in real hot conditions create the chaff that fills the radiator fins and that is where we see some issues. Even then it depends on what you are mowing.
I'm no AC expert, but that is what I have gleaned over the years. And it might be you have something else going on. I just needs to get up on my "radiator not passing airflow" soapbox every once in a while since it is such a common problem.
