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Find a model →Pit up to four models against each other. Engine, hydraulics, hitch, weight, warranty.
Open comparison →Written guides on choosing tractors, hydraulics, PTO, hitches, and maintenance.
Read articles →A side-by-side comparison of the 4066M and 4066R parked together, walking through both similarities and differences feature by feature. Covers base weight, loader capacities, cab vs. open-station options, and a detailed list of 4R-only extras: suspension seat, tilt steering, cruise control, motion/load/speed match, factory third-function hydraulics, and quick-adjust sway arms. Goes reasonably deep on practical tradeoffs. Best for shoppers deciding whether the 4R's premium features justify the price difference.
Good Works Tractors is a tractor and attachment dealer that also sells and finances equipment, so the walkaround carries a sales-oriented perspective alongside the practical comparisons.
The D170 loader on the 4M lifts around 2,400 pounds to full height, while the H180 on the 4R lifts around 2,540 pounds, both measured at the base of the loader arm.
Not from the factory, but the speaker mentions a 4066M with an aftermarket third function diverter kit and thumb control installed, so it can be done aftermarket.
The 4R has a suspension seat, tilt steering, cruise control, armrests, motion match, load match, speed match, and pull-pin sway arms, which the 4M does not have.
Yes, the base weight of an open station tractor is 3,770 pounds for both, not including the loader, since the bones of the machines are the same.
| John Deere 4066M | John Deere 4066R | |
|---|---|---|
| PTO horsepower | 58 hp | 57 hp |
| Loader lift capacity | 400E: 3,853 lbf at pivot; 2,902 lbf at 500 mm forward of pivot | 400E: 3,853 lbf at pivot point; 2,902 lbf 500 mm forward of pivot point; 440R NSL: 4,027 lbf at pivot point; 3,037 lbf 500 mm forward of pivot pin; 440R MSL: 3,844 lbf at pivot point; 3,346 lbf 500 mm forward of pivot pin |
| 3-point lift capacity | 3,130 lb | 3,130 lb |
| Hydraulic flow | 10.2 gpm | 10.2 gpm |
