Disaster!

[ChrisAus]

Thank for the responses. I'll remove the radiator and work from there. It is ideed thermosiphon and has no water pump and no thermostat that I can find.

What should be the normal operating temp range when it's running properly?

 

[winston1]

How Hot Should My Tractor Run?

 

[California]

if my 135D has a thermostat I can't for the life of me find it anywhere, and that includes searching the manual for any reference to a thermostat. Have I missed something?

My slightly larger Yanmar from that era is designed with no thermostat. I expect yours lacks one. A thermostat is to help warming up, so the lack of one shouldn't affect overheating.

104C with moderate load is too hot. They are designed to run at full load all day, rototilling for example, and never overheat. I agree its time to take the radiator in to get checked and probably rodded out.

 

[turnerbend]

Thank for the responses. I'll remove the radiator and work from there. It is ideed thermosiphon and has no water pump and no thermostat that I can find.

What should be the normal operating temp range when it's running properly?

If the outside temp is 80 or above, my Yanmar1500 have been running 200 to 230 degs. for 10 years with out any problems.

 

[ChrisAus]

I'll be able to provide a more accurate update mid week, but having removed the radiator this morning and taken it to a local radiator specialist, I'm fairly confident that a thorough flush and clean will fix the overheating problem for good. At least one third of the radiator core looked as though it was obstructing airflow due to a mixture of dust and god knows what else.

Thanks for your help!

 

[kwin]

my 1300d witch is one size up from yours will idle around 160, under a load it will get to 190 0r 87.7c. If it gets hotter then the radiator gets cleaned and it will go back to 180f. I run stright water with water wetter only in it. this is on a 80d day also.

 

[Neat 1500]

Yanmar Tractor Overheating

Mmmm as suspected! Good find Winston. Mine runs at about 105c on a 25c day but no hotter. on a 40c day flat out it might creep up to 110c but thats it. it does not overheat.

 

[ChrisAus]

I've since been informed that the radiator is officially kaput. Multiple leaks and flow obstructed in at least half of the tubes. It'll be re-cored by next week and I should then be back in business. Hardly the ideal first tractor experience but at least I know it'll be 100% serviceable.

 

[Gale Hawkins]

Many older machines need it done so it is now behind you.

 

[clemsonfor]

A new radiator or recored or a rodded out rad is nothing uncommon on something that is 35 years old, especially something like a tractor that gets defferred maintenence or non at all!! Take my uncle for example, he bought a brand new JD4400 about 12 years or so ago. I bet he has never had the coolant replaced in it. I know he has not done it. Not sure that JD uses "10 year coolant" in thier machines either . I am guilty of it as well. flushing my vehicle green antifreeze usually when something needs to be done where coolant needs to be drained. That reminds me i need to drain our TOY highlander coolant and refill.

 

[kenmac]

I would flush the block real good B-4 installing rad. You don't want to stop up your new radiator.

 

[ChrisAus]

Success!

I picked up the re-cored radiator, put it all back together and took it for a test run. It ran perfectly and sat between about 85-88c. I ran it under load for about an hour without issue so I'd say that I'm finally in possession of a properly functioning tractor.

Many thanks to all those who provided help and advice. A special thanks to Winston for the considerable time and effort afforded.

 

[ChrisAus]

Success!

I picked up the re-cored radiator, put it all back together and took it for a test run. It ran perfectly and sat between about 85-88c. I ran it under load for about an hour without issue so I'd say that I'm finally in possession of a properly functioning tractor.

Many thanks to all those who provided help and advice. A special thanks to Winston for the considerable time and effort afforded.

 

[Gale Hawkins]

Chris thanks for the update and success on whipping the running hot issue.