JD 544k overheating

[Newbury1289]

i have a 2018 JD 544k with 777 hr the problem i am having is the cooling fan is not working properly, the fan is running at 200rpm at 100% command, and about 500 rpm at wide open throttle, I tested for power at solenoid I have 26v when running, and tested solenoid, this machine does not have reversible fan valve, the hydraulic fluid is at the correct level any advice would be appreciated.

 

[mg2361]

Welcome to HEF Newbury!

Complete machine serial number please.

Unplug the fan solenoid. What is the fan speed at fast idle with 140* oil?

 

[Newbury1289]

serial# 1DW544KZJJF689767 fan speed at fast idle with solenoid unplugged is about the same at 200rpm, also the fan command with solenoid unplugged stays at 0%

 

[Newbury1289]

I was thinking either a bad valve or fan motor, any suggestions would be appreciated

 

[heymccall]

On my 544J machines, I lost the plastic water pump impeller on both of them, but only after 15k hours. Tattletale was cold heater core hoses.

 

[mg2361]

fan speed at fast idle with solenoid unplugged is about the same at 200rpm

With the solenoid unplugged it should be at full speed (1800 rpm). That indicates a problem with either your fan pump, fan motor, or the fan control valve.

Your serial indicates that you still have the extended powertrain/hydraulic warranty. So I would contact your dealer.

 

[Newbury1289]

Ok great, I appreciate the information I will contact the dealer today