Kubota L6060 heat not working

[Loganw15]

My kubota L6060 cab heater isn’t working. The coolant lines around the engine compartment are around 130-140°, but the lines up by the heater core are only about 60-70°. I can blow air through the lines from top to bottom, so there shouldn’t be any blockages. Anything else I should check?

 

[SDT]

My kubota L6060 cab heater isn’t working. The coolant lines around the engine compartment are around 130-140°, but the lines up by the heater core are only about 60-70°. I can blow air through the lines from top to bottom, so there shouldn’t be any blockages. Anything else I should check?

Low coolant?

No, you cannot determine radiator level by looking at the expansion tank.

 

[Loganw15]

Low coolant?

No, you cannot determine radiator level by looking at the expansion tank.

Nope it’s full. That’s the first thing I checked

 

[mcmxi]

My kubota L6060 cab heater isn’t working. The coolant lines around the engine compartment are around 130-140°, but the lines up by the heater core are only about 60-70°. I can blow air through the lines from top to bottom, so there shouldn’t be any blockages. Anything else I should check?

The M6060/M7060 WSM lists the following probable causes for "Insufficient Heating".

• Water valve damaged
• Temperature motor damaged
• Insufficient coolant

 

[BAP]

Do you have any heating problems with the engine? How does the engine run? Remove the radiator cap and run the engine for a while until warmed up checking in the radiator to see if there is any bubbles coming out of the coolant. Compression getting into the cooling system will mess with how the heater works.

 

[SDT]

Nope it’s full. That’s the first thing I checked

How did you verify that coolant is of sufficient level to fully fill the heater core and hoses to the cab?

 

[tthorkil]

My kubota L6060 cab heater isn’t working. The coolant lines around the engine compartment are around 130-140°, but the lines up by the heater core are only about 60-70°. I can blow air through the lines from top to bottom, so there shouldn’t be any blockages. Anything else I should check?

Google airlock in heater core?