Repeat Overheating

[tcb5040]

Well i've been dealin with this for months and i can't figure out what's wrong with it so i need some help. I have a hydro ck20 and when under work it will overheat alot and the overfill tank fills up fast. Sometimes while bushhoggin it will slowly heat up and i'll have to let it cool,but sometimes like today when i was gradin the road it just jumped up and blew the cap off the overflow tank. I top off the water and blow out the radiator screen regularly but it just keeps happening. Thanks for help in advance

 

[Sandlot]

First thing that comes to mind would be the thermostat. I would get a new one and see if that doesn't fix the problem. The other possibility would be the water pump, but I would start with the thermostat.

 

[8404]

before you get a new thurmastat or water pump, make sure you have cleaned the radiator. I only use my tractor for brush cutting and sometimes even after i have blown out the radiator" front screen and front of the radiator" it still overheats and i found out that verry small seeds and dirt gets inbetween the tinny vains of the radiator you need to use a water hose with some pressure to force out the dirt. you will be suprised as to how much dirt is still inside the cooling fins.

 

[unhappykioti]

Check your radiator cap as well. Had a car once that continually overheated, replaced water pump, radiator, thermostat still overheated. Turned out to be wrong radiator cap.

 

[Willl]

Replace everything.

 

[Coyote machine]

Try this: BEFORE starting the tractor, remove the radiator cap and make sure the radiator is full, as well as the overflow tank. Start and run the tractor at idle and do not put it under any load. See if it comes up to temperature on the gauge and watch carefully what goes on at the radiator filler neck. If you see flow, which you should once the thermostat opens up it should continue to flow past the filler neck WITHOUT rising up and out of the radiator. If it rises up and spills over then you may have a t-stat that is stuck closed. If it never reaches temp after a reasonable time and you are not seeing a steady flow of fluid past the filler neck there may be a pump vane issue, clogged radiator, etc.
Have you looked to see if there is any fluid being lost? Do you have to fill up the radiator or overflow on a regular basis?
Post back hours on engine, any leaks or major engine repairs done recently or in near distant past.

 

[tcb5040]

Thanks for all the replies guys i'll try all this today..
the tractor only has about 300 hours on it and has never had any engine work..all fluids have been changed on time and filters. And it is losing coolant fluid i have to fill i t up at least once every 2 weeks

 

[jda1961]

Well i've been dealin with this for months and i can't figure out what's wrong with it so i need some help. I have a hydro ck20 and when under work it will overheat alot and the overfill tank fills up fast. Sometimes while bushhoggin it will slowly heat up and i'll have to let it cool,but sometimes like today when i was gradin the road it just jumped up and blew the cap off the overflow tank. I top off the water and blow out the radiator screen regularly but it just keeps happening. Thanks for help in advance

you better take it to the dealer and get it fixed, pay now or pay later. your choice.

 

[o2batsea]

Symptoms of exhaust gasses getting into the cooling jacket. Might be a head gasket. You should not be losing coolant nor pressurizing the overflow tank.

 

[Sandlot]

Losing fluid and not seeing anything on the floor is a bad thing. As o2batsea said, it could be a head gasket problem. Does she smoke any? You may luck out and just find that your radiator cap is bad and allowing your tractor to boil over. This could account for some coolant loss. Run the test that Coyote Machine recommended but also look for air bubbles or foam coming out of the radiator neck.