John Deere 8630 Specs ( 1975-1978 )
Overview
The John Deere 8630 is a 4WD farm tractor manufactured in Waterloo, Iowa, from 1975 to 1978. It features a 10.1L 6-cylinder turbocharged diesel engine rated at 225.59 PTO horsepower and was originally sold for approximately $53,000 in its final production year.
Ideal Applications
Mechanical and Transmission Configuration:
Equipped with a Quad-Range 16-speed partial power shift transmission and a 125-inch wheelbase, the tractor utilizes hydraulic wet disc brakes and a standard Sound-Gard cab.
Tested Performance Metrics:
Under Nebraska Tractor Test 1180, the unit achieved a maximum drawbar pull of 26,443 lbs and recorded a maximum fuel consumption rate of 15.3 gallons per hour during PTO performance testing.
Operational Capacity and Fluid Specifications:
The system supports high-volume operations with a 156-gallon fuel tank, a 26-gallon hydraulic capacity, and a 33-gpm pump flow delivered through a closed center constant pressure system.
Production
| Description | Built in Waterloo, Iowa, USA / Original price was $53,000 in 1978 |
|---|---|
| Drive type | Four-wheel Drive (4WD) tractor |
| Manufacturer | John Deere |
Engine
| Engine type | John Deere 10.1L 6-cyl diesel |
|---|---|
| Air cleaner | dry |
| Bore/Stroke | 5.12x5.00 inches (130 x 127 mm) |
| Compression | 15.4:1 |
| Coolant capacity | 44 qts (41.6 L) |
| Description | John Deere / turbocharged diesel / 6-cylinder / liquid-cooled |
| Displacement | 619 ci (10.1 L) |
| Idle RPM | 800-2300 |
| Operating RPM | 1500-2100 |
| Power | 275 hp (205.1 kW) |
| Rated RPM | 2100 |
| Starter volts | 12 |
| Drawbar (tested) | 198.12 hp (147.7 kW) |
| PTO (claimed) | 225 hp (167.8 kW) |
| PTO (tested) | 225.59 hp (168.2 kW) |
Transmission
| Clutch | hydraulic wet disc |
|---|---|
| Gears | 16 forward and 4 reverse |
| Transmission | John Deere Quad-Range |
| Transmission type | 16-speed partial power shift |
| Type | partial power shift |
Mechanical
| Description | Hydraulic wet disc brakes / Sound-Gard cab standard. Optional air-conditioning. |
|---|---|
| Drive type | Four-wheel drive |
| Steering | hydraulic power |
Capacity
| Fuel | 156 gal (590.5 L) |
|---|---|
| Hydraulic system | 26 gal (98.4 L) |
Hydraulics
| Capacity | 26 gal (98.4 L) |
|---|---|
| Pump flow | 33 gpm (124.9 lpm) |
| Type | closed center constant pressure |
| Valves | 2 |
Hitch
| Rear Type | III |
|---|
PTO
| Engine RPM | 2100 |
|---|---|
| Rear PTO | independent |
| Rear PTO Type | 1000 |
Electrical
| Batteries | 2 |
|---|---|
| Battery CCA | 975 |
| Battery volts | 6 |
| Charging system | alternator |
| Ground | negative |
Dimensions & Tires
| Front axle | 3.622 by 96 inches (91 by 2438 mm) / 3.622 by 118 inches (91 by 2997 mm) |
|---|---|
| Ground clearance | 19.4 inches (49 cm) |
| Height (exhaust) | 134.5 inches (341 cm) |
| Length | 223.5 inches (567 cm) |
| Rear axle | 3.622 by 96 inches (91 by 2438 mm) / 3.622 by 118 inches (91 by 2997 mm) |
| Wheelbase | 125 inches (317 cm) |
| Width | 95.8 inches*Standard axle (243 cm) |
| Front tire | 18.4-34 |
| Rear tire | 18.4-34 |
| Weight | 24150 to 24500 pounds |
| Wheelbase | 125 inches (317 cm) |
| Ag front | 18.4-34 |
| Ag rear | 18.4-34 |
8630 Serial Numbers
| 1975 | 1000 |
|---|---|
| 1976 | 2382 |
| 1977 | 5222 |
| 1978 | 7626 |
| Description | FAQ: How to read a serial number table. |
| Location: | Back of transmission case |
John Deere 8630 Weight
| Ballasted | 26480 lbs (12011 kg) |
|---|---|
| Operating | 24500 lbs (11113 kg) |
| Shipping | 24150 lbs (10954 kg) |
Nebraska Tractor Test 1180
| Description | Diesel Quad-Range 4WDJune 3 - 11, 1975Link: Nebraska Tractor Test 1180 file / PTO performance / Drawbar performance |
|---|---|
| Fuel use | 15.3 gal/hour (57.9 l/hour) / 13.7 gal/hour (51.9 l/hour) |
| Max power | 198.12 hp (147.7 kW) |
| Max pull | 26,443 lbs (11994 kg) |
| Power at rated engine speed | 225.59 hp (168.2 kW) |
Speeds
| Description | With 18.4x34 tires. |
|---|