The John Deere 4440 tractor was manufactured from 1978 to 1982 and was the most desired tractor in the Iron Horse line. The 4440 is considered to be a full-sized farm/agricultural tractor and is equipped with a turbocharged 6 cylinder engine. In 1982 the 4440 sold at retail for $44,000. Today you can find these tractors available for around $20,000 to $30,000. At the end of the first year of production, the rear axle was increased from 86mm to 92mm. You can find the JD 4440 in two variations, the standard and the High-crop. The High crop has a higher clearance which is better suited for jobs that deal with tall crop harvesting and negotiating difficult terrain. A rear three-point hitch (type IIIN/II) is compatible with a variety of attachments such as plows. The 4400 can use two types of front loaders, one with a 1,350 lb capacity and the other at 1,771 lbs.
The John Deere 4440 is equipped with a 6 cylinder diesel engine with turbocharged aspiration. The inline cylinders have a displacement of 466 ci. The cooling system holds 36 quarts of liquid coolant.
The claimed power delivered to the draw bar is 112 hp, while the PTO is claimed at 130hp. Testing revealed the actual power to be very close to John Deere's claims, with the drawbar at 112.69 hp and the PTO at 130.58 hp. The 4440 has a rear independent power take-off with RPMs of 540/1000.
The John Deere 4440 tractor came standard as a 2 wheel drive with HFWD 4WD systems available. The different systems varied in weight from 11780 to 15775 pounds. The 4440 features a "Quad Range" transmission with four gears in four ranges. It features a power shift in each range in pairs 1-2 and 3-4, and synchronized shifting between 2 and 3. Two reverse speeds are available in ranges A through C. The tractor must come to a full stop with the clutch used to shift between ranges. In total, the 4440 features 8 forward speeds and 4 reverse.
The 4440 features a closed center hydraulic system at 2250 psi. Valve flor sits at 23 gpm with 2 or 3 valves.
- Power shift 2wd: 11 gallon
- Quad range 2wd: 13 gallon
- Power shift 4wd: 15 gallon
- Quad Range 4wd: 17 gallon
The electrical system on the John Deere 4440 is powered by an alternator at 61 amps (ROPS) / 72 amps (cab). Two six volt batteries provide 800 cold cranking amps for startup.
- Pedal Actuated Hydraulic Differential Lock
- Hydrostatic power steering
- Differential hydraulic wet-disc brakes