Lineage ← Predecessor 4440 1978–1982 · 144 hp This model 4450 1983–1988 · 140 hp
Successor → 4455 1988–1992 · 156 hp Power specifications Engine 158.2 hp unspecified PTO 140 hp claimed PTO, tested 140.4 hp Drawbar 121 hp claimed Drawbar, tested 120.1 hp Listed power 158 hp engine basis
Engines fitted to the John Deere 4450 John Deere 7.6L 6-cyl dieselDiesel · 6 cyl 466 ci
Engine details John Deere 7.6L 6-cyl diesel Bore × stroke 4.56 in × 4.75 in Rated speed 2,200 rpm Rated power 158.2 hp Compression 15.8:1 Aspiration turbocharged diesel Cooling liquid-cooled Firing order 1-5-3-6-2-4 Transmissions for the John Deere 4450 John Deere Quad-Rangepartial power shift 16F / 6R John Deere Power Shiftfull power shift 15F / 4R
Transmission notes John Deere Quad-Range: Tractor must be stopped to select one of four ranges. Clutchless power shift between speeds 1-2 and 3-4 in range. A synchronized shift (using clutch) can be made between 2 and 3 in range.
John Deere Power Shift: Optional transmission. Full (clutchless) power shift can be made between gears, forward and reverse.
Weight specifications Weight 15,400 lb operating Shipping 12,745 lb
Dimensions specifications Wheelbase 106.7 in Length 154.1 in Width 96 in Height 116.5 in Ground clearance 15.8 in
Capacities specifications Fuel tank 65 gal Hydraulic system 10.5 gal
Hydraulics specifications System closed center Pump flow 26.5 gpm Pressure 2,277 psi Remote valves 2 or 3
Hitch specifications Rear hitch category IIIN/II Control lower-link draft sensing Rear lift capacity 6,294 lb
PTO specifications Rear PTO independent Rear PTO speeds 540/1000 Clutch hydraulic wet disc Engine rpm at PTO speed 540@2200
Chassis specifications Drive 2WD/4WD Steering Power steering Brakes Hydraulic wet disc brakes Differential lock hydraulic rear Final drives inboard planetary Cab Sound-Gard cab standard. Optional four-post Roll-Gard ROPS
Tires specifications Front 10.00-16 Rear 18.4-38
Electrical specifications System voltage 6 V Batteries 2 Charging alternator Charging output 72 A Ground negative
Production specifications Factories Waterloo, Iowa, USA Built by John Deere
Data from TractorData.com , last updated there 31 March 2022; collected 7 October 2026. See sources and attribution .
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The John Deere 4450 was the best-selling model of the entire 50-series line of tractors. The 4450 alone accounted for 20% of sales in the line. John Deere introduced its Caster/Action front-wheel drive system on these tractors. By enabling the tractors' front wheels to angle up to 13-degrees, sharper turn angles and larger front tires could be used.