Now it is Christmas along with a JD4020 Question

I started a thread on another forum since it is officially Christmas since I heard "Grandma Got Run Over by A Reindeer" on the radio this morning.

I looked around and found "Grandpa Got Run Over by A Beer Truck" and
then I found
"Grandpa Got Run Over By A John Deere"

Now for the question.

They show a 4020, I don't remember the three hydraulic filters on the right side, think someone added them for the rear remotes? I remember one filter and I think it was in this area, but it's hard to remember the last time I was on a 4020 was over 30 years ago.

I assume you are refering to the three white canisters on the right side of the engine. The two filters toward the front with one directly above the other are fuel filters. There were a couple of different fuel filter arrangements on the 4020. It depended on the serial number. The other one is an additional lube filter for the engine that comes with the aftermarket turbo on the tractor. It looks like an M&W kit on there.