John Deere 4630 Overview
The John Deere 4630 is a capable field tractor designed for mid-size work. A 404-cubic-inch diesel powers steady torque, running near 2,200 rpm for reliable starts and predictable performance.
The drivetrain is primarily 2WD with closed-center hydraulics and a Category III/IIIN rear hitch, delivering straightforward control and lifting capability for common implements.
Manuals and Nebraska test reports back these numbers, but verify the exact serial range and configuration before ordering parts or performing service. Use the cited manuals, parts diagrams, and test reports to confirm the exact configuration before relying on one spec line.
John Deere 4630 Quick Answers
- Production yearsThe John Deere 4630 was produced from 1973 through 1977.
- PowerPublished power data includes 150.66 hp at 2200 rpm; drawbar power varies with configuration. Match those figures to the documented engine and transmission setup before treating them as model-wide.
- EngineThe John Deere 4630 engine displacement is 404 ci 6.6 L.
- PTO and hitchThe John Deere 4630 has a 1000 (1.375) rear PTO and a Category III/IIIN rear hitch.
- Service capacityPublished capacities include engine oil 17 qts 16.1 L; coolant capacity is 36 qts 34.1 L.
Engine and Power
Engine and power: a 404-ci diesel with ether pre-heating, a compression ratio of 16:1, and a rated 2200 rpm. The engine’s torque and starting behavior are documented in Nebraska test data.
Diesel engine
John Deere / aftercooled turbocharged diesel / 6-cylinder / liquid-cooled inline horizontal-shaft
| Displacement | 404 ci 6.6 L |
|---|---|
| Bore Stroke | 4.25x4.75 inches 108 x 121 mm |
| Air Cleaner | dry with secondary element |
| Pre Heating | ether injection |
| Compression | 16.0:1 |
| Rated Rpm | 2200 |
| Firing Order | 1-5-3-6-2-4 |
| Starter | electric |
| Starter Volts | 12 |
| Engine Oil Capacity | 17 qts 16.1 L |
| Coolant Capacity | 36 qts 34.1 L |
Manufacturer
Manufacture years
Tested PTO
Tested drawbar
Transmission
Three transmission families appear in the John Deere 4630 lineup: partially synchronized, partial power shift, and full power shift. The four main configurations across ranges influence shift schedules and service needs.
John Deere Syncro-Range
| Name | John Deere Syncro-Range |
|---|---|
| Type | partially synchronized |
| Gears | 8 forward and 2 reverse |
| Clutch | hydraulic wet disc |
John Deere Quad-Range
| Name | John Deere Quad-Range |
|---|---|
| Type | partial power shift |
| Gears | 16 forward and 6 reverse |
| Clutch | hydraulic wet disc |
John Deere Power Shift
| Name | John Deere Power Shift |
|---|---|
| Type | full power shift |
| Gears | 8 forward and 4 reverse |
| Clutch | hydraulic wet discs |
PTO and Hitch
PTO and hitch notes center on a 1000 (1.375) rear PTO, a Category III/IIIN rear hitch, and a sturdy rear lift associated with the tractor’s tested configuration.
Rear PTO
Rear PTO type
Rear hitch
Rear lift
Hydraulics
Hydraulics use a closed-center system with multiple valve options to suit common implements; actual flow and valve count depend on configuration.
Type
Valves
Fluids, Battery, and Service Facts
Maintenance notes include engine oil capacity (17 qts) and coolant capacity (36 qts); electrical system uses two batteries. Follow the specific parts catalog or operator manual for fluids and replacements.
Fuel tank
Battery volts
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
Front tire
Rear tire
Ag front
- 10.00-16
- 14L-16A
Ag rear
- 18.4-38
- 24.5-32
Electrical
Electrical rows are included when documented.
Ground
Charging system
Battery volts
Serial Number Lookup
Serial-range information helps identify build year and configuration; verify prefixes and range with official manuals or parts catalogs.
1973
1974
1975
1976
1977
Manuals and Documents
The documents below add manual, parts, and test context for the John Deere 4630. They help with controls, service categories, parts matching, and tested-performance details that extend beyond short spec rows.
- John Deere 4630 Tractor Operators ManualOperator manual for John Deere 4630 (model years 1973–1977); covers safety, controls, operation, fuels and lubricants, lubrication and periodic service, specifications.Open source
- John Deere 4430 and 4630 Tractors TM-1172 Technical ManualTechnical service manual for 4430 and 4630 tractors (Jan-77); covers general information, engine, power train, hydraulic system, and specifications.Open source
- John Deere 4630 Tractor Parts Catalog PC-1296Parts catalog for John Deere 4630, PC-1296 (Dec 1976); includes OEM parts listings and diagrams for the 4630 family.Open source
- Nebraska Tractor Test Data 1976Nebraska test data for John Deere 4630 DSL (NEBR TEST NO 1113, 1972); includes engine displacement, rated RPM, max HP at rated RPM, PTO HP, drawbar HP, ballast/weight, and transmission details.Open source
- Test 1113: John Deere 4630 Power Shift DieselNebraska Tractor Test Lab report for John Deere 4630 Power Shift Diesel; data and procedures consistent with OECD/SAE guidelines; published January 1972.Open source
Parts Checks Before Ordering
Do not order John Deere 4630 parts from the model name alone. Match the part to the tractor's code, serial range, engine, transmission, and PTO setup before selecting service parts.
Belts, filters, fluids, and electrical parts can vary by configuration. Exact part numbers require a parts catalog, manual, or trusted supplier source.
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.