Hefty
Hefty F
The Hefty F is a utility tractor produced from 1974 to 1978 by Hefty in Juneau, Wisconsin, USA. It features a Continental R800-46 0.8L 4-cylinder gasoline engine built by Renault, producing 27 hp. The tractor has a 6-speed gear transmission with mechanical dry disc clutch, two-wheel drive, and mechanical disc brakes. It includes an open operator station and an independent rear PTO with 540 rpm. The hydraulics system is open center with 2000 psi pressure and 3.2 gpm pump flow. The tractor hitch is type I with position control and rear lift capacities of 1570 lbs at ends and 1210 lbs at 24 inches. Dimensions include a 68-inch wheelbase, 101-inch length, and 58-inch height at the steering wheel, with a shipping weight of 2200 lbs. Tires are 5.00-15 front and 11.2-24 rear, with an additional 6.00-12 front option. Electrical system is 12 volts with negative ground.
Power27 hp
Founded1974 - 1978
ModelF
Technical Specifications
Detailed specifications and technical data for Hefty F
Power
| Engine | 27 hp (20.1 kW) |
|---|---|
| PTO (claimed) | 24 hp (17.9 kW) |
Tires
| Ag rear | 11.2-24 |
|---|---|
| Ag front | 5.00-15 |
| Additional Ag front | 6.00-12 |
Engine
| Note | The Continental R800 engine was built by Renault. |
|---|---|
| Type | gasoline, 4-cylinder, liquid-cooled inline |
| Model | Continental R800-46 |
| Power | 27 hp (20.1 kW) |
| Starter | electric |
| Fuel tank | 5 gal (18.9 L) |
| Rated RPM | 3300 |
| Bore/Stroke | 2.28x3.14 inches (58 x 80 mm) |
| Compression | 8:1 |
| Displacement | 51.6 ci (0.8 L) |
| Firing order | 1-3-4-2 |
| Starter volts | 12 |
| Coolant capacity | 5 qts (4.7 L) |
Dimensions
| Length | 101 inches (256 cm) |
|---|---|
| Wheelbase | 68 inches (172 cm) |
| Rear tread | 38 to 62 inches (96 to 157 cm) (F) |
| Front tread | 40 to 60 inches (101 to 152 cm) (F) |
| Shipping weight | 2200 lbs (997 kg) |
| Ground clearance | 18.5 inches (frame) (46 cm) |
| Clearance (rear axle) | 19.5 inches (49 cm) |
| Clearance (front axle) | 16 inches (40 cm) |
| Height (steering wheel) | 58 inches (147 cm) |
Electrical
| Ground | negative |
|---|---|
| Battery volts | 12 |
Hydraulics
| Type | open center |
|---|---|
| Pressure | 2000 psi (137.9 bar) |
| Pump flow | 3.2 gpm (12.1 lpm) |
Mechanical
| Drive | Two-wheel drive |
|---|---|
| Brakes | Mechanical disc brakes |
| Steering | Manual steering |
| Final drives | spur gear |
| Operator station | Open operator station |
Production
| Type | Utility tractor |
|---|---|
| Built in | Juneau, Wisconsin, USA |
| Years produced | 1974 - 1978 |
Transmission
| Type | gear |
|---|---|
| Gears | 6 forward and 1 reverse |
| Clutch | mechanical dry disc |
| Description | Two speeds, plus reverse, in three ranges. |
Tractor hitch
| Control | position control |
|---|---|
| Rear Type | I |
| Rear lift (at ends) | 1570 lbs (712 kg) |
| Rear lift (at 24"/610mm) | 1210 lbs (548 kg) |
Serial Numbers
| Location | Serial number plate on the right side of the transmission. |
|---|
Power Take-off (PTO)
| Rear PTO | independent |
|---|---|
| Rear PTO Type | 540 (1.375) |