Overview
The Steiger Tiger III ST-450 is a four-wheel-drive farm tractor manufactured in Fargo, North Dakota, from 1977 to 1982. It is equipped with an 18.8L Cummins KTA-1150 six-cylinder turbocharged diesel engine rated at 470 hp and an Allison six-speed full power shift transmission with a locking torque converter.
Ideal Applications
Tested Drawbar Performance:
According to Nebraska Tractor Test 1282, the tractor recorded a maximum drawbar power of 369.76 hp and a maximum pull capacity of 42,715 lbs.
Powertrain and Mechanical Configuration:
The ST-450 features articulated power steering, planetary final drives, and an 18.8L engine that produces 1580 lb-ft of torque at 1500 RPM.
Chassis and Operational Capacities:
This model is built on a 150-inch wheelbase with a standard weight of 45,360 lbs and carries a 385-gallon fuel tank to support a tested fuel consumption rate of 23.7 gallons per hour.
Production
| Description | Built in Fargo, North Dakota, USA |
|---|---|
| Drive type | Four-wheel Drive (4WD) tractor |
| Manufacturer | Steiger |
Engine
| Engine type | Cummins 18.8L 6-cyl diesel |
|---|---|
| Bore/Stroke | 6.25x6.25 inches (159 x 159 mm) |
| Compression | 15.5:1 |
| Coolant capacity | 112 qts (106.0 L) |
| Description | Cummins KTA-1150 / turbocharged diesel / 6-cylinder / liquid-cooled inline / The 470 horsepower Cummins engine was available in early versions of the Steiger Tiger III. Later, this version became the ST-470 when the 450 horsepower Caterpillar engine became an option. |
| Displacement | 1150 ci (18.8 L) |
| Idle RPM | 650-2350 |
| Oil capacity | 76 qts (71.9 L) |
| Power | 470 hp (350.5 kW) |
| Rated RPM | 1700 *The KTA-1150 was rated at 1700 and 2100 RPM |
| Starter volts | 24 |
| Torque | 1580 lb-ft (2142.5 Nm) |
| Torque RPM | 1500 |
| Drawbar (tested) | 369.76 hp (275.7 kW) |
Transmission
| Description | Power shift six-speed transmission with locking torque converter. Torque converter automatically locks when transmission side reaches 1700 RPM. |
|---|---|
| Gears | 6 forward and 1 reverse |
| Transmission | Allison CLT 5965 |
| Transmission type | 6-speed full power shift with torque converter |
| Type | full power shift with torque converter |
Mechanical
| Cab | Safari Cab standard with air-conditioning. |
|---|---|
| Description | Articulated power steering / Hydraulic disc brakes |
| Drive type | Four-wheel drive |
| Final drives | planetary |
Capacity
| Fuel | 385 gal (1457.2 L) |
|---|---|
| Hydraulic system | 48 gal (181.7 L) |
Hydraulics
| Capacity | 48 gal (181.7 L) |
|---|---|
| Pressure | 2250 psi (155.1 bar) |
| Pump flow | 38 gpm (143.8 lpm) |
| SCV flow | 25 gpm (94.6 lpm) |
| Type | open center |
| Valves | 5 |
Electrical
| Batteries | 4 |
|---|---|
| Battery CCA | 625 |
| Battery volts | 12 |
| Charging amps | 90 |
| Charging system | alternator |
| Ground | negative |
Dimensions & Tires
| Description | Raba K594 rear axle |
|---|---|
| Front axle | Raba K594 |
| Height (exhaust) | 161 inches (408 cm) |
| Length | 289 inches (734 cm) |
| Max weight | 50000 lbs (22680 kg) |
| Weight | 45360 lbs (20575 kg) |
| Wheelbase | 150 inches (381 cm) |
| Width | 47 inches (Frame) (119 cm) |
| Front tire | 30.5x32 |
| Rear tire | 30.5x32 |
| Weight | 45360 lbs (20575 kg) |
| Wheelbase | 150 inches (381 cm) |
| Ag front | 30.5x32 |
| Ag rear | 30.5x32 |
Nebraska Tractor Test 1282
| Description | Diesel 6-speed 4WDJuly 6 - 13, 1978Link: Nebraska Tractor Test 1282 file / Drawbar performance / Gear 3 used for power test. / Gear 1 used for pull test. |
|---|---|
| Fuel use | 23.7 gal/hour (89.7 l/hour) |
| Max power | 369.76 hp (275.7 kW) |
| Max pull | 42715 lbs (19375 kg) |
References
| Description | Tiger III ST 450 published in 1979, by Steiger / Tiger III ST 450 published in 1979, by Steiger / Series III Panthers and Tigers equipped with Allison Transmissions published in 1979, by Steiger |
|---|
Tiger III ST-450 Serial Numbers
| 1977 | 130-00001 |
|---|---|
| 1978 | 130-00047 |
| 1979 | 130-00097 |
| Description | FAQ: How to read a serial number table. |