The John Deere 4630 epitomizes 1970s tractor innovation, boasting robust power, mechanical reliability, and operator comfort. Its turbocharged diesel engine, versatile transmission options, and advanced hydraulic system ensure efficiency and performance in the field. Equipped with features like power steering and a Sound-Gard cab, it prioritizes operator comfort and safety. Whether tackling tough terrain or handling various implements, the 4630 offers precision and power, making it a staple on farms across America. As a collectible, it symbolizes a significant era in agricultural history, cherished for its contribution to farming excellence and its enduring legacy of reliability and durability.
| John Deere 4630 Tractor Specifications |
|---|
| Type | Row-Crop tractor |
| Built in | Waterloo, Iowa, USA |
| Original Price (1977) | $27,080 |
| Power |
|---|
| PTO (claimed) | 150 hp (111.9 kW) |
| Drawbar (tested) | 127.92 hp (95.4 kW) |
| PTO (tested) | 150.66 hp (112.3 kW) |
| Mechanical |
|---|
| Drive | 4×2 2WD, 4×4 HFWD 4WD |
| Final Drives | Planetary |
| Differential Lock | Hydro-mechanical rear |
| Engine Specs |
|---|
| Engine Model | John Deere |
| Engine Type | Six-cylinder direct injection turbocharged diesel |
| Displacement | 404 cu in (6.60 L) |
| Bore/Stroke | 4.25×4.78 inches (108.0×121.0 mm) |
| Aspiration | Turbocharged |
| Rated Engine Power | 166 hp (123.0 kW) @ 2200 rpm |
| Compression | 16.0:1 |
| Fuel System | Direct injection |
| Air Cleaner | Dry with secondary element |
| Fuel Tank Capacity | 65 gal (246.0 L) |
| Oil Capacity | 17 qts (16.0 L) |
| Coolant Capacity | 30 qts (28.5 L) |
| Electrical System Rating | 12 Volts |
| Charging System | Alternator, 37/55 Amps |
| Power Take-Off (PTO) |
|---|
| PTO Operational Type | Independent |
| PTO Horsepower | 150 hp (112.0 kW) |
| PTO Speed | 1000 rpm |
| PTO / Engine Speed | 1000/2200 rpm |
| PowerShift Transmission |
|---|
| Gearbox Type | 8F/4R, Full power shift |
| Forward Gears | 8 |
| Reverse Gears | 4 |
| Maximum Forward Speed | 17.7 mph (28.5 kph) |
| Maximum Reverse Speed | 6.0 mph (9.5 kph) |
| Clutch | Hydraulic wet disc |
| Oil Capacity | 40 qts (38.0 L) |
| Syncro Range Transmission |
|---|
| Gearbox Type | 8F/2R, Partially synchronized |
| Forward Gears | 8 |
| Reverse Gears | 2 |
| Maximum Forward Speed | 18.8 mph (30.2 kph) |
| Maximum Reverse Speed | 6.6 mph (10.6 kph) |
| Clutch Type | Hydraulic wet disc |
| Oil Capacity | 44 qts (41.5 L) |
| Quad-Range Transmission |
|---|
| Gearbox Type | 16F/6R, Partial powershift |
| Forward Gears | 16 |
| Reverse Gears | 6 |
| Maximum Speed (Forward) | 17.7 mph (28.6 kph) |
| Maximum Speed (Reverse) | 11.2 mph (18.0 kph) |
| Clutch | Hydraulic wet disc |
| Oil Capacity | 44 qts (41.5 L) |
| Wheels and Tires |
|---|
| Drive Wheels | 2WD/4WD |
| Steering Configuration | Front Steer |
| Steering System | Power |
| Front Tire Size | 10.0×16 |
| Rear Tire Size | 18.4×38 |
| Rear Track Width | 60-90 inches (1520-2280 mm) |
| Hydraulics and Hitch |
|---|
| Hydraulic System Type | Closed center |
| Implement Pump Flow | 22 gpm (83.5 Lpm) |
| Hydraulic Pressure | 155 Bar (2250 psi) |
| Hydraulic Capacity | 11 gal (42.0 L) |
| Number of Standard Remote Valves | 1/3 |
| 3-Point Hitch Category | 3/3N |
| Rear Lift Capacity | 5260 lbs (2385 kg) |
| Dimensions and Weight |
|---|
| Wheelbase | 112 inches (2840 mm) |
| Length | 162 inches (4100 mm) |
| Overall Width | 91 inches (2300 mm) |
| Height (ROPS) | 110 inches (2780 mm) |
| Height (Cab) | 127 inches (3210 mm) |
| Operating Weight | 16250 lbs (7370 kg) |
John Deere 4630 overview
The John Deere 4630, produced from 1973 to 1977 in Waterloo, Iowa, marked a significant step in Deere’s Generation II line—launching the pioneering “Sound‑Gard” cab and packing a 6.6 L after-cooled turbo diesel engine pushing around 150 hp. With multiple transmission options (Syncro‑Range, Quad‑Range, or full Power‑Shift), it catered to diverse farming needs, whether for loader work or heavy tillage. Farmers appreciated its strong pull, weight, and cab comfort. Yet, its radiator was undersized, often leading to overheating—solved by regular cleaning or kits—while its 1000‑rpm PTO limited implement flexibility.
On forums, users confirm the 4630 could reliably run past 10 000 hours if well-maintained. One noted how a clean radiator kept the tractor cool during strenuous work, praising its heavy-duty pulling even with tillage gear. Another pointed out that early models had cooling problems and that camshaft and bearings often wore prematurely—encouraging buyers to inspect service history. Hydraulic power steering and front-wheel assist were lauded for improving maneuverability in tough spots, even if not full mechanical front-wheel drive.
Common issues include deteriorating battery-cabling beneath the operator station—leading to starting troubles—and occasionally flawed hydraulic screens or PTO reliability. Forum veterans stress pre-purchase inspections by experienced JD mechanics, especially for power-shift units, ensuring the transmission shifts smoothly and that cooling systems are working well.
what stands out is the model’s balance of robust pulling power, all-day reliability, and classic cab comfort. Though it demands meticulous maintenance—radiator upkeep, hydraulic screen changes, and attention to cooling—it remains a beloved workhorse and practical collector’s choice.
