John Deere 4320 Overview
The John Deere 4320 covered here is the 1971-1972 row-crop tractor, not the later small-utility model with the same number. It uses Deere's 404 ci (6.6 L) diesel and sits above the 4020 in the New Generation row-crop line.
Because Deere reused the model number later, source matching matters. Use the serial table, tractor service manual, and Nebraska Test 1050 before applying parts or maintenance information, and ignore modern compact-utility documents when working on a 1971-1972 4320.
John Deere 4320 Quick Answers
- Production yearsThe John Deere 4320 was produced from 1971 through 1972.
- EngineEngine displacement is 404 ci (6.6 L).
- PTO and hitchRear PTO is 540/1000 with a Category II rear hitch.
- Service capacityEngine oil capacity is 16 qts (15.1 L); transmission oil capacity is 56 qts (53.0 L); hydraulic capacity is 14 gal (53.0 L).
Engine and Power
Engine and power: a 404 ci (6.6 L) diesel; six-cylinder layout with compression 15.7:1 and a rated 2,200 rpm.
Diesel engine
John Deere / turbocharged diesel / 6-cylinder / liquid-cooled
| Displacement | 404 ci 6.6 L |
|---|---|
| Bore Stroke | 4.25x4.75 inches 108 x 121 mm |
| Fuel Use | 7.953 gal/hour 30.1 l/hour |
| Air Cleaner | paper elements |
| Compression | 15.7:1 |
| Rated Rpm | 2200 |
| Idle Rpm | 800-2200 |
| Operating Rpm | 1500-2200 |
| Firing Order | 1-5-3-6-2-4 |
| Starter Volts | 12 |
| Engine Oil Capacity | 16 qts 15.1 L |
| Coolant Capacity | 28 qts 26.5 L |
Manufacturer
Manufacture years
Tested PTO
Tested drawbar
Transmission
Transmission: John Deere Syncro-Range with 8 forward and 2 reverse; configuration affects service and parts matching.
John Deere Syncro-Range
| Name | John Deere Syncro-Range |
|---|---|
| Type | partially synchronized |
| Gears | 8 forward and 2 reverse |
| Clutch | 13.5-inch dry disc |
| Transmission Oil Capacity | 56 qts 53.0 L |
PTO and Hitch
PTO and hitch focus on a 540/1000 rear PTO and Category II hitch; rear lift varies by configuration.
Rear PTO
Rear PTO type
Rear hitch
Rear lift
Hydraulics
Hydraulics: closed center system with a 22 gpm pump flow and 14 gal hydraulic capacity; valve count commonly 1–3 depending on setup.
Type
Capacity
Pump flow
Valves
Fluids, Battery, and Service Facts
Maintenance: engine oil capacity 16 qts; coolant 28 qts; hydraulic 14 gal; transmission 56 qts. Specific filters, belts, and fluids depend on engine/transmission/PTO setup and require the parts catalog or manuals.
Fuel tank
Hydraulic system
Tires and Dimensions
Tire and dimension values can vary by wheel, axle, and configuration.
Configuration-specific values are split out where the same model has documented differences by engine, transmission, or equipment.
Wheelbase
Weight
Length
Width
Height
Front tire
Rear tire
Ag front
- 10.00-16
- 11.00-12 (single front)
Ag rear
- 18.4-34
- 15.5-38
Electrical
Electrical rows are included when documented.
Ground
Serial Number Lookup
Serials help identify year and configuration; 1971–1972 examples include serials such as 6000 (1971) and 17031 (1972); final unit numbered 27484.
1971
1972
final
Manuals and Documents
Use these links to check the correct 1971-1972 row-crop 4320 sources. Modern small-utility parts sheets and test reports use the same model number, but they do not belong with this tractor.
Match serial range, transmission, PTO, hydraulics, and engine details before relying on a source for parts or service.
- John Deere 4320 Tractor Service ManualService manual for the 1971-1972 John Deere 4320 row-crop tractor.Open source
- Test 1050: John Deere 4320 Syncro RangeNebraska Tractor Test Lab report for the John Deere 4320 Syncro Range, published January 1970.Open source
Parts Checks Before Ordering
Parts should be matched to the tractor’s model code, serial range, engine, transmission, and PTO setup; do not rely on the model name alone.
Fluids, filters, belts, and hydraulic parts vary by setup; confirm exact part numbers with a catalog or reputable supplier before ordering.
Accuracy Note
Tractor specifications can vary by year, region, factory configuration, installed equipment, and later repairs. Match serial range, engine, transmission, PTO setup, and model code before ordering parts or doing service work.