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.
Welcome to HEF Newbury ! Complete machine serial number please. Unplug the fan solenoid. What is the fan speed at fast idle with 140* oil?
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%
I was thinking either a bad valve or fan motor, any suggestions would be appreciated
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.
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.
Ok great, I appreciate the information I will contact the dealer today