David Brown 3800 Selectamatic VS Allis Chalmers WD45 specs comparison

David Brown 3800 Selectamatic
General InfosMake | David Brown |
Model | 3800 Selectamatic |
Country | United states |
Production | From 1968 Until 1971 |
Price | 4,000 USD |
Tractor type | Utility tractor |
Fuel | gasoline |
Service repair manual | David Brown 3800 Selectamatic Manual |
Dimensions, sizes and tires
AG front tires | 14.9/13-24 |
AG rear tires | 13.6/12-28 |
Lawn front tires | - |
Lawn rear tires | - |
Indus front tires | - |
Indus rear tires | - |
Weight | 3885 lbs or 1762 kg |
Length | 115.625 inches [293 cm] |
Width | 64.5 inches [163 cm] (min) |
Height | - |
Wheelbase | 76 inches [193 cm] |
Ground clearance | - |
Turning radius | - |
Rear tread size | 48 to 76 inches |
Front tread size | 48 to 72 inches |
Turning radius | - |
Horsepower and engin specs
Engine capacity | 146.1 ci or 2.4 L |
Cylinders | 3 cylinders |
Engine power | - |
Engine RPM | 2200 (rpm) |
Torque | 115 lb-ft or 155.9 Nm | Torque RPM | 1400 (rpm) |
Fuel type | gasoline |
Fuel injection | - |
Fuel tank size | 9.5 gal or 36.0 L |
Oil capacity | 6.75 qts or 6.4 L |
Oil change | - |
Starter motor | - |
Starter volts | 12 V |
Parts And Accessories | David Brown 3800 Selectamatic Parts |
Batteries number | 1 |
Batteries voltage | 12 V |
Battries Amps | - |
Cold Amps | - |
Ground force | - |
Charging system | - |
Charging Volts | - |
Charging Amps | - |
Trans system | - |
Trans type | gear |
Trans gears | 12 forward and 4 reverse |
Clutch system | dry disc |
Wheel drive | 4x2 2WD |
Final drive | spur gear |
Steering | manual |
Braking system | mechanical shoe |
Cabin type | Open operating station |
Differentiel lock | rear diff lock standard |
System | Selectamatic |
Valves | - |
Pump flow | 7.3 gpm or 27.6 lpm |
SVC flow | - |
Steering flow | - |
Tank capacity | 6 gal or 22.7 L |
Hydraulic pressure | 2000 psi or 137.9 bar |
Max flow | - |
Drawbar type | - |
Claimed power | - |
Drawbar horsepower | 32.13 hp or 24.0 kW |
Fuel consumption | 3.4 gal/hour or 12.9 l/hour |
Pulling power | 4419 lbs or 2004 kg |
Claimed power | 39 hp or 29.1 kW |
Real power | 37.24 hp or 27.8 kW |
Engine @RPM | - |
PTO Clutch | - |
Rear PTO | live |
Rear PTO RPM | 540 (rpm) |
Front PTO | - |
Front PTO RPM | - |
Mid PTO | - |
Mid PTO RPM | - |
Fuel consumption | 3.3 gal/hour or 12.5 l/hour |
Hitch system | position and draft control |
Rear hitch | I |
Rear hitch lift | 1600 lbs or 725 kg |
Front hitch | - |
Front hitch lift | - |

Allis Chalmers WD45
General InfosMake | Allis Chalmers |
Model | WD45 |
Country | United states |
Production | From 1953 Until 1957 |
Price | - |
Tractor type | Row Crop tractor |
Fuel | gasoline |
Service repair manual | Allis Chalmers WD45 Manual |
Dimensions, sizes and tires
AG front tires | 5.50-16 |
AG rear tires | 12-28 |
Lawn front tires | - |
Lawn rear tires | - |
Indus front tires | - |
Indus rear tires | - |
Weight | 3995 lbs or 1812 kg |
Length | 128 inches [325 cm] |
Width | - |
Height | - |
Wheelbase | 88 inches [223 cm] |
Ground clearance | 29 inches [73 cm] |
Turning radius | 8 feet [2.4 m] |
Rear tread size | 55.6 to 90.1 inches |
Front tread size | - |
Turning radius | - |
Horsepower and engin specs
Engine capacity | 230 ci or 3.8 L |
Cylinders | 6 cylinders |
Engine power | - |
Engine RPM | 1625 (rpm) |
Torque | 259 lb-ft or 351.2 Nm | Torque RPM | 1169 (rpm) |
Fuel type | gasoline |
Fuel injection | - |
Fuel tank size | 15 gal or 56.8 L |
Oil capacity | 7 qts or 6.6 L |
Oil change | - |
Starter motor | - |
Starter volts | 12 V |
Parts And Accessories | Allis Chalmers WD45 Parts |
Batteries number | - |
Batteries voltage | 6 V |
Battries Amps | 115 amps |
Cold Amps | - |
Ground force | positive |
Charging system | - |
Charging Volts | - |
Charging Amps | - |
Trans system | - |
Trans type | sliding gear |
Trans gears | 4 forward and 1 reverse |
Clutch system | 178mm wet disc |
Wheel drive | 4x2 2WD |
Final drive | - |
Steering | mechanical |
Braking system | mechanical band |
Cabin type | Open operator station |
Differentiel lock | - |
System | - |
Valves | - |
Pump flow | - |
SVC flow | - |
Steering flow | - |
Tank capacity | 1.5 gal or 5.7 L |
Hydraulic pressure | - |
Max flow | - |
Drawbar type | - |
Claimed power | 23 hp or 17.2 kW |
Drawbar horsepower | 39.50 hp or 29.5 kW |
Fuel consumption | - |
Pulling power | 5908 lbs or 2679 kg |
Claimed power | - |
Real power | - |
Engine @RPM | - |
PTO Clutch | 254mm dry disc |
Rear PTO | live |
Rear PTO RPM | 540 (rpm) |
Front PTO | - |
Front PTO RPM | - |
Mid PTO | - |
Mid PTO RPM | - |
Fuel consumption | - |
Hitch system | - |
Rear hitch | - |
Rear hitch lift | - |
Front hitch | - |
Front hitch lift | - |
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Useful links and guides ....
- David Brown provided us with the latest version of its 3800 Selectamatic service repair manual
- Find All mechanical and electrical parts and accessories of David Brown 3800 Selectamatic farm-tractor here
- Get your Allis Chalmers WD45 manual book version
- Cabine, electrical And mechanical parts for Allis Chalmers WD45 farm-tractor here