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John Deere
4066M
4 Series Compact Tractors

John Deere 4066M

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Powerful Yanmar® Diesel Engine Delivers Plenty of Power

The Yanmar® diesel engine has a high-torque reserve that provides plenty of power under heavy load. This 4-cylinder engine features lower levels of exhaust emissions and reduced noise levels. It meets EPA Final Tier 4 (FT4) emission standards. The engine uses the latest technologies to optimize fuel economy and improve control and accuracy.

Side studio view of a 4066R open station tractor's uncovered Yanmar® Diesel Engine
PowrReverser™ Transmission Allows for Clutchless Directional Changes

The 12/12 PowrReverser™ transmission, available on 4M and 4R Tractors, enables clutchless forward-to-reverse shifting using a single lever, thanks to its hydraulically actuated wet clutch system. It features 12 forward and 12 reverse speeds, dual wet-disk clutches for durability, and is especially effective for loader work due to its fast shuttle shift and quiet, helical-cut gears.

PowrReverser™ Transmission Allows for Clutchless Directional Changes
Styling Improves Visibility and Serviceability

The bold styling of the 4M and 4R Tractors enhances both appearance and functionality, echoing the design of larger agricultural models. Key features include an aggressively sloped hood for better visibility, hybrid exhaust, and easy access to service points like the battery and engine.

Studio front left shot of a 4044R OOS compact utility tractor
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Specs & Compare
Select up to 4 models to compare specifications
John Deere
4066M
Compact Tractor
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4044M HST/PRT (Model year 2024)
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4044R HST/PRT (Model year 2024)
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4052R HST/PRT (Model year 2024)
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4066R (Model year 2024) Gear 4WD / HST 4WD
Kubota®
L6060 HST/HSTC
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Machine Configuration

Wheel or Track ConfigurationWheel

Engine

Emissions CertificationsFinal Tier 4
Displacement127 cu in.4 / 2.189 L
4 / 133.5 cu in.
4 / 2.189 L
4 / 133.5 cu in.
4 / 2.091 L
4 / 127.6 cu in.
4 / 2.091 L
4 / 127.6 cu in.
4 / 2.091 L
4 / 127.6 cu in.
4 / 2.4 L
4 / 148.5 cu in.
AspirationTurbocharged and charge air cooledNaturalNaturalTurbochargedTurbochargedTurbocharged and charge air cooledTurbocharged
Number of Cylinders4FourFourFourFourFourFour
Cylinder LinersCast-in-blockCast-in-blockCast-in-blockCast-in-blockCast-in-blockCast-in-blockCast-in-block
Rated Engine Speed2600 rpm2600 rpm2600 rpm2600 rpm2600 rpm2600 rpm2700 rpm
Rated Engine Power65 hp
(SAE J1995)
SAE J1995 rated power: 31.7 kW
42.5 hp
43.1 PS at 2600 rpm
SAE J1995 rated power: 31.7 kW
42.5 hp
43.1 PS at 2600 rpm
SAE J1995 rated power: 37.9 kW
50.8 hp
51.5 PS at 2600 rpm
SAE J1995 rated power: 37.9 kW
50.8 hp
51.5 PS at 2600 rpm
SAE J1995 rated power: 48.5 kW
65 hp
65.9 PS at 2600 rpm
97/68/EC rated power
46.3 kW
62 hp
Rated Engine Power49 kWSAE J1995 rated power: 31.7 kW
42.5 hp
43.1 PS at 2600 rpm
SAE J1995 rated power: 31.7 kW
42.5 hp
43.1 PS at 2600 rpm
SAE J1995 rated power: 37.9 kW
50.8 hp
51.5 PS at 2600 rpm
SAE J1995 rated power: 37.9 kW
50.8 hp
51.5 PS at 2600 rpm
SAE J1995 rated power: 48.5 kW
65 hp
65.9 PS at 2600 rpm
97/68/EC rated power
46.3 kW
62 hp
Rated Engine Power66 PSSAE J1995 rated power: 31.7 kW
42.5 hp
43.1 PS at 2600 rpm
SAE J1995 rated power: 31.7 kW
42.5 hp
43.1 PS at 2600 rpm
SAE J1995 rated power: 37.9 kW
50.8 hp
51.5 PS at 2600 rpm
SAE J1995 rated power: 37.9 kW
50.8 hp
51.5 PS at 2600 rpm
SAE J1995 rated power: 48.5 kW
65 hp
65.9 PS at 2600 rpm
97/68/EC rated power
46.3 kW
62 hp
Compression Ratio19.1:119.1:119.1:119.1:119.1:119.1:1
LubricationPressurizedPressurizedPressurizedPressurizedPressurizedPressurizedPressurized
Cooling System TypeLiquid
Fuel TypeDiesel; High-pressure common rail direct injection
Air Cleaner TypeDual element

Transmission

ClutchWetWetWetWetWetWetSingle-stage, dry type
Cruise ControlOptionalOptionalStandardOptionalStandardStandardStandard

Rear Power Take-Off (PTO)

Economy PTO Speeds540 rpm
Engagement MethodIndependent
PTO ClutchWet disc

Rear Hitch

Draft Control SensingPosition controlPosition controlPosition controlPosition controlPosition controlPosition controlStandard position control
Optional draft control

Hydraulics

Hydraulic System TypeOpen center
Auxiliary Hydraulic FeaturesUp to six rear remote control valves available

Front Axle

Front Axle Differential LockYes

Rear Axle

Final DrivePlanetaryPlanetaryPlanetaryPlanetaryPlanetaryPlanetaryBevel Gear

Steering & Brakes

Primary BrakesMulti-plate wet disc

Tires

Front Tires Size8-16 (Farm), 27x10.5-15 (Turf), 10-16.5 (Industrial)

Electrical System

Alternator Capacity75 amp

Operator Station

Gearshift LocationPowrReverser - Left-hand side