New Holland L555 deluxe overheating (Kubota diesel)

[ironandsteel]

I could use some advice. My trusty old New Holland L555 deluxe skid steer with a Kubota Diesel engine, has started to lose cooling efficiency. After running for about 15 minutes and picking up a round bale, the temperature light comes on (I wish it had a gauge).

Plenty of coolant in the radiator. It has about 3900 hours on it.

What are likely causes? All I can think of are a bad water pump, bad thermostat, or a clog in the radiator or elsewhere in the cooling system.

What would be the most likely thing on an old Kubota diesel like this?

 

[Jim.ME]

Is the fan belt tight/not slipping? Any play in the water pump?

Have you washed or blown the radiator out? It could be plugged from oil, dust, chaff, etc.

Does it have an oil cooler mounted on in front of the radiator? check to see it is not plugged, or foreign material has not built up in between the two blocking air flow.

Check the engine temp with an infrared temp gun, could be a bad sender. Has it blown coolant out the overflow?