AGCO AGCOSTAR 8425

The AGCO AGCOSTAR 8425 is a tractor produced by Agco. It is equipped with a 774 ci 12.7 L engine. The listed engine power is Diesel (listed): 425 hp / 316.9 kW; Diesel (listed): 425 hp / 316.9 kW. Transmission: Eaton Fuller. Operating weight: 28300 lbs 12836 kg.

Overview

	1995 - 2001 Four-wheel Drive (4WD) tractor

Production
Manufacturer	AGCO
Four-wheel Drive (4WD) tractor
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.

AGCO 8425 Transmission
18-speed partially synchronized
Transmission details ...

AGCO 8425 Power
Engine	425 hp 316.9 kW
Drawbar (tested)	346.61 hp 258.5 kW
Performance test details ...

Mechanical
Four-wheel drive
Final drives	outboard planetary
Articulated power steering
Hydraulic dry disc brakes
Cab standard with air conditioning.

Hydraulics
Type	closed center
Pressure	2500 psi 172.4 bar
Valves	4 or 5
Pump flow	35 gpm 132.5 lpm
SCV flow	27 gpm 102.2 lpm

Dimensions & Tires
Wheelbase	137.1 inches 348 cm
Weight	28300 lbs 12836 kg
Front tire	20.8R42
Rear tire	20.8R42
Full dimensions and tires ...

Electrical
Ground	negative
Charging system	alternator
Charging amps	130
Batteries	3
Battery CCA	600 (Detroit)
	700 (Cummins)
Battery volts	12

References
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.

Engine

Engine options
Cummins 14.0L 6-cyl diesel
Detroit Diesel 12.7L 6-cyl diesel

Engine Detail — 855 ci / 14.0 L Diesel

Manufacturer	Cummins N14
Configuration	turbocharged aftercooled diesel, 6-cylinder 24-valve, liquid-cooled inline
Displacement	855 ci 14.0 L
Bore/Stroke	5.50x6.00 inches 140 x 152 mm
Power	425 hp 316.9 kW
Fuel system	direct injection
Air cleaner	dual paper elements with aspirator
Pre-heating	coolant heater
Compression	16.5:1
Rated RPM	2100
Torque	1500 lb-ft 2034.0 Nm
Torque RPM	1400
Starter volts	12

AGCO 8425 Engine

Engine Detail — 774 ci / 12.7 L Diesel

Manufacturer	Detroit Diesel Series 60
Configuration	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	774 ci 12.7 L
Power	425 hp 316.9 kW
Fuel system	direct injection
Pre-heating	coolant heater
Rated RPM	2100
Torque	1500 lb-ft 2034.0 Nm
Torque RPM	1200

AGCO 8425 Engine

Transmission

Transmission — Eaton Fuller

Transmission	Eaton Fuller
Type	partially synchronized
Gears	18 forward and 2 reverse
Clutch	393.7mm cerametallic disc

Dimensions

AGCO 8425 Tires
Ag front	20.8R42
Ag rear	20.8R42
Ag front	24.5-32
	30.5L-32
	20.8R38
Ag rear	24.5-32
	30.5L-32
	20.8R38

Dimensions
Wheelbase	137.1 inches 348 cm
Length	272.4 inches 691 cm
Width	152.9 inches*Width over duals. 388 cm
Ground clearance	20.5 inches 52 cm
Clearance (drawbar)	23 inches 58 cm

AGCO 8425 Weight
Shipping	28300 lbs 12836 kg
Ballasted	40375 lbs 18314 kg
Max capacity	42500 lbs 19278 kg

AGCO 8425 Height
Hood	94.6 inches 240 cm
Cab	133.2 inches 338 cm
Exhaust	138.9 inches 352 cm

Tests

OCED Tractor Test 1721
Cummins diesel 18-speed 4WD October 1 - 22, 1996 Link: OCED Tractor Test 1721 file
Drawbar performance
Max power	346.61 hp 258.5 kW
Fuel use	22.1 gal/hour 83.6 l/hour
Gear 5L used for power test.
Max pull	35,497 lbs 16101 kg
Gear 2H used for pull test.

Photos

AGCO AGCOSTAR 8425 tractor photo