Hi, I have a Linde H45T which overheats and shuts-down after 10-15 minutes. At which time coolant overflow its evident. I presume this is due to the coolant overheating?

Subsequently, I serviced the engine oil and filter, air filter, hydraulic oil filters (X2) and replaced the water pump. Even though the internal rotor blades of the pump were broken, the new replacement did not seem to resolve anything.

I also flushed the radiator which had the incorrect (green) coolant and renewed with the correct red coolant and demineralised water. Even though I flushed the system several times before refilling with red coolant, it expelled pure green coolant upon first trial run, post the water pump change-over. I'm only mentioning this in case it may indicate a blockage issue?

Should I now focus on the thermostat?

Apologies in advance if this is a stupid question, as I'm somewhat mechanically challenged... but can a poor battery cause related issues? If so, I should divulge that I'm having to jumpstart, thinking that the battery will come good once I am able to run the unit for more than 10 minutes at a time. Please feel free to tell it how it is, if my lack of knowledge is more lacking than first thought.

Any advice would be much appreciated.