Oil Filter: E6201-32443
Hydraulic: T2185-38031
HST: T5855-46531
Fuel: F6800-16411
Kioti did good, as the fuel filter cartridge on CK4010 is the same for all Kioti tractor models in the CK, DK, NX series.
They did bad, giving that same fuel filter cartridge, many different part numbers depending on the model series..but in reality, they are all the very same filter. I would order a fuel filter, even though it's not needed to be changed for the 50hrs.
Also note, the slight change in part number for hydraulic filter. Not a big deal, as we all call it simply the #38031.
I also would order an extra fan belt, just to have a spare belt handy.
Go on Ebay and make your order. Delivery in 3-5 days.