Komatsu WA380-6 Running hot

[Nathaniel Rat]

I have a WA380-6 that gets hot when doing load and carry or transport operations.
It seems to like to run around 203F, but when you start load and carry or transport it warms up to 212-221F pretty quickly and sets the alarm off. Ambient temps are in the mid 70's and 80's, didnt do it all winter when temps were cooler.
So far I have cleaned out the coolers, they appear to be in good shape, all fins are straight.
Changed the water pump and thermostat, they were cheap and easy.

The fan seems to be working normally, I read about certain WA380's losing speed when hot, I dont have a way to measure the speed but it seems to be pulling plenty of air when hot.

Inlet temps to radiator were around 180F and outlet was around 160 when the gauge was showing 195F. This was using an infrared thermometer so I dont put alot of value into the actual number, I thought a 20F drop across the cooler was about right though at idle with low fan speed.

I am thinking of changing the sensor next, all of my readings are from that sensor so far.

Looking for other things I should be looking for.

 

[Makar]

Write me an email, I will send a manual
[email protected]

 

[heymccall]

Do you have any fault codes?
Are any of them for brake pressure?

 

[Nathaniel Rat]

No fault codes, I think the brake pressure issue was related to the relief in the fan leaking?

 

[heymccall]

Sent you doc on what fixed mine.

 

[kmel]

I have a WA380-6 that gets hot when doing load and carry or transport operations.
It seems to like to run around 203F, but when you start load and carry or transport it warms up to 212-221F pretty quickly and sets the alarm off. Ambient temps are in the mid 70's and 80's, didnt do it all winter when temps were cooler.
So far I have cleaned out the coolers, they appear to be in good shape, all fins are straight.
Changed the water pump and thermostat, they were cheap and easy.

The fan seems to be working normally, I read about certain WA380's losing speed when hot, I dont have a way to measure the speed but it seems to be pulling plenty of air when hot.

Inlet temps to radiator were around 180F and outlet was around 160 when the gauge was showing 195F. This was using an infrared thermometer so I dont put alot of value into the actual number, I thought a 20F drop across the cooler was about right though at idle with low fan speed.

I am thinking of changing the sensor next, all of my readings are from that sensor so far.

Looking for other things I should be looking for.

Hi Nathaniel what was the out come of your loader as I’ve got a similar issue fan is not ramping up but I have not been able to get access to a manual to find where the sensors are and or schematics