John Deere 8440 Specs ( 1979-1982 )
Overview
The John Deere 8440 is a four-wheel drive farm tractor produced in Waterloo, Iowa, between 1979 and 1982. It features a 7.6L six-cylinder turbocharged diesel engine paired with a 16-speed partial power shift Quad-Range transmission and articulated power steering. Standard equipment includes a cab, a Category III rear hitch with an 8,545-pound lift capacity, and a 156-gallon fuel tank.
Ideal Applications
Tested Drawbar and PTO Performance:
According to Nebraska Tractor Test 1323, the 8440 achieved a maximum drawbar power of 160.58 hp and a maximum pull of 25,383 lbs, while the PTO performance was tested at 179.83 hp.
Transmission and Drive Configuration:
The mechanical layout consists of a four-wheel drive system and a Quad-Range transmission that offers 16 forward and 6 reverse gears, requiring the tractor to be stopped to select between the four ranges.
Engine and Cooling Specifications:
The 466 cubic inch liquid-cooled engine operates at a rated 2100 RPM with a 15.5:1 compression ratio and is supported by a 40-quart coolant capacity and a 22-quart oil capacity.
Production
| Description | Built in Waterloo, Iowa, USA / Original price was $64,000 in 1982 |
|---|---|
| Drive type | Four-wheel Drive (4WD) tractor |
| Manufacturer | John Deere |
Engine
| Engine type | John Deere 7.6L 6-cyl diesel |
|---|---|
| Bore/Stroke | 4.5625x4.75 inches (116 x 121 mm) |
| Compression | 15.5:1 |
| Coolant capacity | 40 qts (37.9 L) |
| Description | John Deere / turbocharged diesel / 6-cylinder / liquid-cooled |
| Displacement | 466 ci (7.6 L) |
| Firing order | 1-5-3-6-2-4 |
| Idle RPM | 800-2300 |
| Oil capacity | 22 qts (20.8 L) |
| Operating RPM | 1500-2100 |
| Power | 215 hp (160.3 kW) |
| Rated RPM | 2100 |
| Starter volts | 12 |
| Drawbar (tested) | 160.58 hp (119.7 kW) |
| PTO (claimed) | 175 hp (130.5 kW) |
| PTO (tested) | 179.83 hp (134.1 kW) |
Transmission
| Clutch | hydraulic wet disc |
|---|---|
| Description | Four gears (1-4) in four ranges (A-D). Tractor must be stopped to select range. Power shift between gears 1-2 and 3-4 within range. |
| Gears | 16 forward and 6 reverse |
| Oil capacity | 160 qts (151.4 L) |
| Transmission | John Deere Quad-Range |
| Transmission type | 16-speed partial power shift |
| Type | partial power shift |
Mechanical
| Cab | Cab standard. |
|---|---|
| Description | Articulated power steering / Hydraulic wet disc brakes |
| Differential lock | hydraulic front and rear |
| Drive type | Four-wheel drive |
Capacity
| Fuel | 156 gal (590.5 L) |
|---|---|
| Hydraulic system | 40 gal (151.4 L) |
Hydraulics
| Capacity | 40 gal (151.4 L) |
|---|---|
| Pump flow | 33 gpm (124.9 lpm) |
| Type | closed center |
| Valves | 2 |
Hitch
| Rear lift | 8545 lbs (3876 kg) |
|---|---|
| Rear Type | III |
PTO
| Rear PTO | independent |
|---|---|
| Rear PTO Type | 1000 |
Electrical
| Batteries | 2 |
|---|---|
| Battery CCA | 850 |
| Battery volts | 6 |
| Charging amps | 90 |
| Charging system | alternator |
| Ground | negative |
Dimensions & Tires
| Front axle | Rack-and-pinion: 3.937 by 95.8 inches (99 by 2433 mm) / Rack-and-pinion: 3.937 by 118.4 inches (99 by 3007 mm) |
|---|---|
| Front tread | 63 to 130 inches (160 to 330 cm) |
| Ground clearance | 19.4 inches (49 cm) |
| Length | 223.5 inches (567 cm) |
| Operating weight | 26,590 lbs*With 20.8-38 duals. (12061 kg) |
| Rack-and-pinion rear axle | 3.937 by 95.8 inches (99 by 2433 mm) / 3.937 by 118.4 inches (99 by 3007 mm) |
| Rear tread | 63 to 130 inches (160 to 330 cm) |
| Wheelbase | 125 inches (317 cm) |
| Front tire | 18.4-34 |
| Rear tire | 18.4-34 |
| Weight | 26,590 lbs (12061 kg) |
| Wheelbase | 125 inches (317 cm) |
| Ag front | 18.4-34 |
| Ag rear | 18.4-34 |
8440 Serial Number Location
| Description | Serial number plate on the rear of transmission case. |
|---|
8440 Serial Numbers
| 1979 | 1000 |
|---|---|
| 1980 | 2266 |
| 1981 | 3758 |
| 1982 | 5235 |
| Description | FAQ: How to read a serial number table. |
John Deere 8440 Height
| Cab | 126.6 inches (321 cm) |
|---|---|
| Exhaust | 134.5 inches (341 cm) |
| Hood | 87.1 inches (221 cm) |
Nebraska Tractor Test 1323
| Description | Diesel 16-speed 4WDSeptember 10, 1979 - September 15, 1949Link: Nebraska Tractor Test 1323 file / PTO performance / Drawbar performance |
|---|---|
| Fuel use | 11.3 gal/hour (42.8 l/hour) / 11.2 gal/hour (42.4 l/hour) |
| Max power | 160.58 hp (119.7 kW) |
| Max pull | 25,383 lbs (11513 kg) |
| Power at rated engine speed | 179.83 hp (134.1 kW) |
References
| Description | Explore Discover Deere '79 published in 1979, by John Deere / Move up to John Deere... published in 1981 |
|---|
Speeds
| Description | With 18.4-38 tires. |
|---|