Effect of altitude on engine behaviour

[redtree]

Hi every body,
I want to know the effects of the high altitude on the engine behaviour. We have one 324D CAT hydraulic excavator that got C7 engine, the engine got a engine specification plate on the top of the valve cover. According to the engine specification plate the engine is designed for Max Altitude 1500 meters. We are using the machine on a height of 1691 meters currently and it will go to the top height of 2100 meter afterwards.
Now the machine is having over heating problem with normal operation:rolleyes:, we have checked the complete cooling system and there is nothing wrong with that and is working properly. Is this over heating problem due to the high altitude ?? If this is so what is the solution of this problem :dong:??
What we need to change to use the machine at that height?

Experts advise needed at earliest.........
Thanx in advance to every body.

[jctech]

The higher the altitude, the less dense the air, at high altitudes the turbo has a problem providing enough air to match the fuel being injected, also less air is drawn through the radiator than at sea level, and the engine will run hotter than usual.

I am have no experience with the C7 engine, check for a barometric pressure sensor, (ambient air pressure sensor) which will provide altitude information to the ECM, the ECM will adjust the fueling accordingly.

The only fix is not to run at full power.
There are usually derate tables published by the manufacturer.