ID # 25275550

John Deere 4066M Heavy Duty Compact Utility Tractor

Call for Price
  • Turbocharged diesel engine
  • eHydrostatic Transmission
  • Standard mid and rear hydraulics
  • Category 1 and 2, Three-point hitch
4066M Heavy Duty Compact Utility Tractor
Sale Type
John Deere
73 in.
Turbocharged and charge air cooled
Cooling System
Bore And Stroke
3.4 x 3.54 in.
Compression Ratio
Fuel Tank Capacity
15 U.S. gal.
Rated Engine Speed
2600 rpm
Engine Manufacturer
Number Of Cylinders
Engine Power (gross)
65.9 hp
Power Take-off (PTO) Power
eHydro™ transmission: 38.7 kW 52 hp Per SAE J1995

Increased versatility with Category 1 and 2 implement compatibility #

The rear hitch on 4M Heavy-Duty Tractors provides producers with implement versatility to perform in a variety of applications. Attaching implements is convenient with telescoping draft links and Category 1 and 2 hitch balls in base equipment. The mechanical hitch control also features a depth stop and a rate of drop adjustment. This feature provides consistency when lowering the hitch. Each time the position control lever is pushed forward, it stops where the depth stop has been positioned. This is valuable to anyone who desires consistent, level ground.

The 3-point hitch has plenty of lift capacity to handle heavy implements.


3-point hitch lift capacity

610-mm (24-in.) behind center

3-point hitch lift capacity

at lift link ends

1134 kg (2500 lb) 1420 kg (3130 lb)

Category 1 and Category 2 hitches allow for hookup of a variety of 3-point hitch implements.

  • Right-hand lift link and center-link are adjustable to save time when leveling equipment.

3-point hitch control #

The 3-point hitch control on the 4M Heavy-Duty Series Tractors is called position control.

  • Operates precisely with no jerking or leak down
  • 3-point hitch lever features easy-to-read increments for accurate positioning and an easy-to-adjust depth stop control 
  • The S-hook is provided to secure the center-link when hitch is not used

Rate-of-drop/stop valve #

Rate-of-drop/stop valve regulates lowering speed of 3-point hitch. It can be shut off completely to stop hitch movement.

Telescoping draft links (extendable draft links)

Telescoping draft links will reduce the amount of effort to attach 3-point hitch implements by allowing the operator to make small adjustments without moving the tractor. It is standard on 4M Heavy-Duty Tractors.

Horizontal sway bar stabilizers regulate side-to-side sway of 3-point-hitch-mounted equipment.

  • 4M Heavy-Duty Tractors come equipped with the horizontal stabilizer bars, the lock pin goes into the stabilizer bar vertically
  • Mounted on outside of lower links for fast, easy equipment hookup
  • Top-pull pin design allows easy adjustment without use of tools
  • Retainer cable holds pin while pin is removed to adjust stabilizers

Rockshaft position control lever allows operator to accurately set implement depth or height.

  • Operates precisely with no jerking or leak down
  • Control lever features easy-to-read increments for accurate positioning

Easy-to-adjust depth stop enables the operator to lower implement to a predetermined depth.

Excellent visibility provided by standard lighting equipment

Standard equipment lighting includes:

  • Wraparound-style wide-angle halogen headlights for better lighting and visibility
    • Premium integrated automotive-style headlight bezels
  • Two amber flashing warning lights
  • Warning lamps placed to meet ASAE S279.10 standards
  • Dual lamps with increased separation for better visibility and distinction at a distance
  • Two fender-mounted forward and rear halogen working lights

Wraparound-style wide-angle halogen headlights Lamps provide better visibility

Headlights and lamps for increased lighting Fender-mounted working lights

Maximize productivity with an eHydro™ transmission #

The tractor is available with a three-range electronic hydrostatic (eHydro) transmission.

  • Fluid under pressure transmits engine power to the drive wheels using a pump and motor
  • Functions both as a clutch and transmission
  • Provides high torque for startup
  • Reduces powertrain shock loads

Danfoss® supplies both the pump and motor. This ensures that the components are matched to each other, providing maximum efficiency.


The electronic hydrostatic transmission is ideally suited for jobs where productivity is a must, such as loader or mower applications.

Twin Touch™ foot controls allow the operator to select both directions of travel and speed with a touch of the toe.

Danfoss eHydro transmission is used for reliable operation. Durability features include:

  • Large forged trunnion shaft with larger support bearings that reduce vibration and noise

  • Center section made from ductile iron (much stronger than grey iron used in many competitive transmissions)

  • Transmission oil cooler cools transmission oil for longer transmission life

Safety features of the eHydro transmission include:

  • The tractor will start with one or both foot pedals depressed, but it will not move until both pedals first return to neutral.

  • Operator presence system means the tractor will come to a stop if the operator leaves the seat but will not shut off unless the power take-off (PTO) is also running.

Key John Deere advantage Engine oil check/fill tube and oil-drain tube

John Deere's Twin Touch foot controls offer key advantages over competitive hydro model tractors.

  • Some competitive hydrostatic tractors use a treadle pedal designed (toe-heel) foot control for operation of the hydro.
    • Requires the operator to use both toe and heel to change direction, resulting in increased operator fatigue

# Integrated eHydro features

The eHydro convenience controls have been integrated into a single module. Combining features such as SpeedMatch™ LoadMatch™, MotionMatch, eThrottle, and automotive-style cruise control pulls the maximum efficiency out of the eHydro transmission tractors. All these features are standard on the 4M Heavy Duty and 4R models and deliver customers an easier and more comfortable experience.



Press button to active/deactivate eThrottle. When eThrottle is activated, depression of the travel pedal increases engine rpm and tractor speed.


Press button to active/deactivate LoadMatch.  When LoadMatch is activated, engine will not stall during heavy load applications.


Press button to activate/deactivate SpeedMatch.  When SpeedMatch is activated, operator is able to set the desired maximum travel speed.


Press button to activate/deactivate cruise control.  When cruise control is activated, operator is able to set cruise speed.


Press button to set cruise speed, or to decrease cruise/set max speed.

Press button to resume set cruise speed, or to increase cruise/set max speed.

MotionMatch - longer accelerate and decelerate distances.

MotionMatch - shorter accelerate and decelerate distances.
Key features of the eHydro transmission:
  • Infinitely variable ground speeds, in each range, allow the operator to match the speed of the tractor to the job.
  • No clutching for fast and easy direction changes
  • Twin Touch foot pedals for quick and easy forward/reverse operation
  • Cruise control is optional equipment
    • Cruise control switch is located on the right-hand console for easy access
    • Cruise control is electronically engaged and disengaged, which allows for precise setting of speed

Increase productivity with integrated mid-mount loader selective control valve (SCV) and single rear SCV #

The tractor is base equipped with a dual mid SCV.

  • Two sets of right-hand side-mounted couplers allow operating four hydraulic functions (such as raising/lowering boom and curling/dumping bucket).
  • Large 12.7-mm (0.5-in.) diameter couplers are used for maximum oil flow to implements.
  • Hydraulic valves have excellent featherability for smooth operation of equipment.
  • Couplers are color coded for correct hookup.
  • Hydraulic regenerative (REGEN) active, in dump position, out of neutral:
    • Provides faster dump cycle
    • Prevents cylinder voiding

Rear hydraulic couplers - SCVs

The tractor is also base equipped with a single third electrohydraulic SCV.

  • One set of rear mounted couplers allow operating rear mounted hydraulic implements.
  • Large 12.7-mm (0.5-in.) diameter couplers are used for maximum oil flow to implements.
  • Hydraulic valves have excellent featherability for smooth operation of equipment.

Optional rear hydraulic couplers - SCVs

  • Power beyond

Power beyond kit #

Optional on the 4M Heavy-Duty Series Tractors, the power beyond kit:

  • Contains rear-mounted couplers and hoses to access pressurized oil at the rear of the tractor; the kit will be used for operations such as backhoe or log splitters.
  • Couplers are a 12.7-mm (0.5-in.) diameter for maximum oil flow to implements.