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Read articles →An owner-operated full-service walkthrough on a John Deere 4066R covering radiator and air filter cleaning, engine oil and filter changes (with a candid note that the manual's stated oil capacity runs over), fuel filter service, cab foam filter, greasing fittings, and tire pressure. Runs about 19 minutes with real hands-on tips and workarounds. Most useful to 3- or 4-series owners tackling their own routine maintenance.
An owner-operator sharing hands-on service experience from their own 4066R, with no apparent commercial affiliation.
The owner says every time he fills to the manual's stated capacity it is majorly overfilled, so he watches the dipstick while filling instead of trusting the number.
Use a wand with a rubber tip to blow out the stacked radiators starting from the fan side, working forward with light air pressure to avoid bending the aluminum fins.
Cycle the key on and off two or three times to let the fuel pump prime the bowl with fluid before the tractor will crank and run reliably.
It is behind the glass up in the vents, held by four Phillips head screws and two plastic pieces that pop down, revealing the foam filter to blow out.
