John Deere 4066R

The single most common reason owners give for choosing a 4066R is that it is the biggest hydrostatic tractor Deere builds. Two separate owners say outright that they would have bought a 5 series if Deere offered a hydro in one, and a third describes the larger 5 series as clunky by comparison. That framing matters, because almost every conversation about this tractor is really a conversation about whether to buy the 5 series instead — and the answers depend on what the buyer is protecting. People working on client lawns and in tight spaces keep choosing the 4066R because a heavier utility tractor tears turf and will not fit. People with room and heavy ground-engaging work regret it: one owner whose dealer pushed the 4066R bought a 5115M for about $20,000 more and says eight years on he has lost count of the times he was glad, mostly because the 4 series takes Category 1 implements only.

What owners like about the machine itself is comfort and refinement rather than raw capability. Someone moving up from a Kubota L3440 describes it as driving a Cadillac by comparison and lists the specifics — air seat, heat and air conditioning, a third function on the thumb, hitch assist on the rear fender, a hydraulic top link — while noting he had to trim a lot of trees to get the cab under them. The complaint from long-term Deere owners is that the platform has barely moved: one 4052M owner from 2015 looking to trade into a cabbed 4066R found it essentially the same tractor a decade later and is waiting for a redesign, and reckons Deere has the smallest cab in the class on the 3 and 4 series. Price has moved, though — an owner who has kept dealer price sheets since 2014 says the equivalent machine went from about $45,000 for a cab and loader to nearly $70,000.

Reliability reports are broadly good, with one owner calling his 2023 trouble-free and another running his as a field tractor for planting and haying and noting it has not shown the problems he associates with the 5 series. The faults that do appear are electrical rather than mechanical: a 2021 bought new that throws a starter relay error and refuses to start about half the time, with the relay replaced repeatedly and no pattern anyone can find, and a machine that lost forward motion mid-snowstorm while reversing fine, with the speedometer stuck at 10 mph and idle — a transmission speed sensor being the owner's best guess. Worth knowing before you order: this is a Yanmar-engined tractor, unlike the Deere-engined 5075E it is usually cross-shopped against.