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Read articles →A hands-on owner review after five years and nearly 900 hours on a John Deere 4066R cab tractor. Covers specific recurring problems, a faulty fuel sending unit that caused three run-outs, a failed AC blower motor, a cracked fender tied to a redesigned control placement, and a DPF sensor covered under extended warranty. Also addresses regen behavior and the real added cost of hydraulic options not included standard. Best for serious 4-Series buyers weighing reliability and total ownership cost.
An owner-operator sharing long-term hands-on experience from their own property, with a clear but not uncritical loyalty to John Deere based on prior ownership history.
The review covers five years of ownership and just under 900 hours of use on the tractor.
The fuel sending unit hangs up in the tank, giving wrong readings and causing the owner to run out of fuel three times.
No, they are add-ons. The owner paid about 1800 to 1900 dollars for the hydraulic kit, hoses, and valve doing labor himself.
Idling through regen can take up to 30 minutes, but running at high RPM for mowing or heavy work finishes regen much quicker.
