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Curtis B.
Curtis B., Technician
Category: Construction and Road Equipment
Satisfied Customers: 988
Experience:  Technican turned service manager with multiple lines of equipment and rental units.
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My 2006 750j engine is heating up when I'm pushing dirt.

Customer Question

My 2006 750j engine is heating up when I'm pushing dirt. I've done everything from washing out the radiator to replacing the water pump,belt,tensioner,thermostat and have even set the hydraulic fan to run with the engine rpm's (the old fashion way). Anyone have any suggestions?
Submitted: 5 months ago.
Category: Construction and Road Equipment
Expert:  Bradley Martin replied 5 months ago.

Have you tried flushing out the block? may have a calcium build up in the block causing flow issues.

Customer: replied 5 months ago.
I have done that. The problem started suddenly so I was leaning towards thinking maybe it was an air flow issue but I'm pretty much stumped at this point.
Expert:  Bradley Martin replied 5 months ago.

Does yours have the 1025 engine in it?

Customer: replied 5 months ago.
It has 6068 engine.
Expert:  Bradley Martin replied 5 months ago.

Are you going by the gauge when you are checking the temp. or using a thermal gun and checking the temp.

Customer: replied 5 months ago.
I've checked it with a temp gun and it is within 5 degrees of what the gauge reads.
Expert:  Bradley Martin replied 5 months ago.

Do you know the thermostat is opening up?

Customer: replied 5 months ago.
I put a new one in and it heated just the same as it did before. Having said that I haven't actually seen the thermostat operate.
Expert:  Bradley Martin replied 5 months ago.

What does the oil look like?

Customer: replied 5 months ago.
Clean as a whistle and it doesn't lose any water.
Expert:  Bradley Martin replied 5 months ago.

I would have to check that thermostat make sure it is opening up and the coolant is circulating.

Expert:  Bradley Martin replied 5 months ago.

Have you ran the engine with the cap off make sure the engine is not pressurizing the radiator?

Customer: replied 5 months ago.
It doesn't seem to be. It does have a plastic overflow tank and the level doesn't fluctuate. I guess I was wondering about the fan rpm's but I don't know what they are.
Expert:  Bradley Martin replied 5 months ago.

Does this model have a fan clutch or direct bolt to engine?

Customer: replied 5 months ago.
It has a hydraulic driven fan that sits in front of the radiator.
Expert:  Bradley Martin replied 5 months ago.

Is the fan motor working?

Expert:  Bradley Martin replied 5 months ago.

I would still check the cooling system flow with a temp gun to make sure the thermostat is opening I see on your original post that you set the fan to engine speed the fan motor should run at half of engine speed

Customer: replied 5 months ago.
it appears to be operating correctly. I did have a mechanic friend suggest I check to make sure it was operating at full speed but I don't know what full speed is and it seems john Deere is kind of close with their info.
Expert:  Bradley Martin replied 5 months ago.

I will find out what the exact RPM should be can I get with you tomorrow?

Customer: replied 5 months ago.
That would be fine. You can call or text if you want.(###) ###-#### ***** forward to talking to you tomorrow. Thanks
Customer: replied 5 months ago.
Did you find anything out about the fan speed?
Expert:  Bradley Martin replied 5 months ago.

No I did not let me opt out see if someone else can help with the fan speed question I know there is a expert on John Deere see I will see if he can help you.

Expert:  Bradley Martin replied 5 months ago.

Opting out now he should be with you this evening if not earlier is that ok.

Customer: replied 5 months ago.
OK thanks

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