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Hefty F

Hefty F tractor
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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.
Hefty FHefty tractorutility tractorContinental R800 engine27 hp tractor6-speed transmissiontractor dimensionstractor hydraulics
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)