John Deere 4320 Tractor

The classic John Deere 4320 is a 1971-1972 high-horsepower row-crop tractor with a turbocharged 6.6 L diesel and 115 hp claimed PTO. It is an appealing heavy-work and collector model, but buyers should verify the 2WD or HFWD configuration and exact equipment against TractorData.com.

John Deere 4320 specifications

What the 4320 is used for

The 4320 was built for heavy tillage, large PTO implements, and demanding drawbar work. Its output filled the Deere lineup gap between the 4020 and the larger 4520/4620 models.

Closed-center hydraulics, up to three valves, an independent PTO, and a Category II hitch make it capable with substantial period equipment. It is physically large and powerful, so confirm that implement, transport, and storage needs match the tractor.

Why the John Deere 4320 stands out

Often described as a 4020 with turbocharged power, the 4320 also received engine and final-drive upgrades. Deere built 21,485, and it was available with open station, optional two-post ROPS/canopy, or optional cab equipment.

Buying a used John Deere 4320

Verify the serial plate at the rear of the transmission case and confirm whether the tractor is 2WD or the optional HFWD 4WD version. Test turbocharger condition, cold starting, clutch and all eight gears, hydraulic response and remote valves, PTO, wet brakes, steering, and final drives; also inspect cab or ROPS condition and avoid assuming optional equipment was factory-installed without documentation.

John Deere 4320 frequently asked questions

How much PTO horsepower does a John Deere 4320 have?

John Deere claimed 115 PTO hp, while the cited test recorded 116.55 PTO hp.

What engine is in a classic John Deere 4320?

It uses a 6.6 L turbocharged six-cylinder diesel engine.

Was the John Deere 4320 available with four-wheel drive?

Yes. It was available as 2WD or with optional HFWD 4WD.

Specifications are commonly cited figures for general reference; exact figures vary by year and serial number, so confirm against TractorData.com and the machine's records. Values and prices of used tractors vary by condition and region. Page updated Aug 4, 2026.

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