Overview
The AGCOSTAR 8425 is a four-wheel drive farm tractor produced between 1995 and 2001 in Coldwater, Ohio, featuring an articulated chassis and an 18-speed partially synchronized Eaton Fuller transmission. It was equipped with a 425 hp diesel engine from either Cummins or Detroit Diesel, though the Detroit Diesel option was discontinued after 1998 in favor of the 14.0L Cummins N14.
Ideal Applications
Engine and Power Configuration:
The 8425 is equipped with a 6-cylinder turbocharged aftercooled engine rated at 425 hp and 1500 lb-ft of torque, supported by a 230-gallon fuel tank and a closed center hydraulic system with a 35 gpm pump flow.
Tested Drawbar Performance:
In OCED Tractor Test 1721, the Cummins-equipped model recorded a maximum drawbar power of 346.61 hp and a maximum pull of 35,497 lbs while operating at a fuel consumption rate of 22.1 gallons per hour.
Weight and Chassis Specifications:
This articulated tractor features a 137.1-inch wheelbase and a shipping weight of 28,300 lbs, which can be ballasted up to a maximum capacity of 42,500 lbs for heavy-duty 4WD operation.
Production
| Description | Built in Coldwater, Ohio, USA / The AGCOSTAR 8425 was based on the McConnell 1000, AGCO had purchased McConnell in 1994. The 8425 was available in silver, orange, or red paint for White, Allis, and Massey customers. |
|---|---|
| Drive type | Four-wheel Drive (4WD) tractor |
| Manufacturer | AGCO |
Engine
| Engine type | Cummins 14.0L 6-cyl diesel / Detroit Diesel 12.7L 6-cyl diesel |
|---|---|
| Fuel tank | 230 gal (870.6 L) |
| Air cleaner | dual paper elements with aspirator |
| Bore/Stroke | 5.50x6.00 inches (140 x 152 mm) |
| Compression | 16.5:1 |
| Description | Cummins N14 / turbocharged aftercooled diesel / 6-cylinder 24-valve / liquid-cooled inline / Detroit Diesel Series 60 / turbocharged diesel / 6-cylinder / liquid-cooled inline / The Detroit Diesel engine was an option on the 8425 through 1998. Starting in 1999, only the Cummins engine was available. |
| Displacement | 855 ci (14.0 L) / 774 ci (12.7 L) |
| Fuel system | direct injection / direct injection |
| Power | 425 hp (316.9 kW) / 425 hp (316.9 kW) |
| Pre-heating | coolant heater / coolant heater |
| Rated RPM | 2100 / 2100 |
| Starter volts | 12 |
| Torque | 1500 lb-ft (2034.0 Nm) / 1500 lb-ft (2034.0 Nm) |
| Torque RPM | 1400 / 1200 |
| Engine type | Cummins 14.0L 6-cyl diesel / Detroit Diesel 12.7L 6-cyl diesel |
| Drawbar (tested) | 346.61 hp (258.5 kW) |
Transmission
| Clutch | 393.7mm cerametallic disc |
|---|---|
| Gears | 18 forward and 2 reverse |
| Transmission | Eaton Fuller |
| Transmission type | 18-speed partially synchronized |
| Type | partially synchronized |
Mechanical
| Cab | Cab standard with air conditioning. |
|---|---|
| Description | Articulated power steering / Hydraulic dry disc brakes |
| Drive type | Four-wheel drive |
| Final drives | outboard planetary |
Hydraulics
| Pressure | 2500 psi (172.4 bar) |
|---|---|
| Pump flow | 35 gpm (132.5 lpm) |
| SCV flow | 27 gpm (102.2 lpm) |
| Type | closed center |
| Valves | 4 or 5 |
Electrical
| Batteries | 3 |
|---|---|
| Battery CCA | 600 (Detroit) |
| Battery volts | 12 |
| Charging amps | 130 |
| Charging system | alternator |
| Ground | negative |
Dimensions & Tires
| Ag front | 20.8R42 / 24.5-32 |
|---|---|
| Ag rear | 20.8R42 / 24.5-32 |
| Clearance (drawbar) | 23 inches (58 cm) |
| Ground clearance | 20.5 inches (52 cm) |
| Length | 272.4 inches (691 cm) |
| Wheelbase | 137.1 inches (348 cm) |
| Width | 152.9 inches*Width over duals. (388 cm) |
| Front tire | 20.8R42 |
| Rear tire | 20.8R42 |
| Weight | 28300 lbs (12836 kg) |
| Wheelbase | 137.1 inches (348 cm) |
AGCO 8425 Height
| Cab | 133.2 inches (338 cm) |
|---|---|
| Exhaust | 138.9 inches (352 cm) |
| Hood | 94.6 inches (240 cm) |
AGCO 8425 Weight
| Ballasted | 40375 lbs (18314 kg) |
|---|---|
| Max capacity | 42500 lbs (19278 kg) |
| Shipping | 28300 lbs (12836 kg) |
OCED Tractor Test 1721
| Description | Cummins diesel 18-speed 4WDOctober 1 - 22, 1996Link: OCED Tractor Test 1721 file / Drawbar performance / Gear 5L used for power test. / Gear 2H used for pull test. |
|---|---|
| Fuel use | 22.1 gal/hour (83.6 l/hour) |
| Max power | 346.61 hp (258.5 kW) |
| Max pull | 35,497 lbs (16101 kg) |
References
| Description | AgcoStar published in 1995, by AGCO* / AGCOSTAR Sales Training Manual published in 1995 / AgcoStar: Stellar Performance...Down-To-Earth Value. published in 1995, by AGCO / AgcoStar: Built To be Big On Economy & Production. published in 1997, by AGCO / Product Insight: 9300 STEIGER vs. Agcostar 8360 & 8425 published in 1996 / *Publication contains known errors. |
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