Hefty G
The Hefty G is a tractor produced by Hefty. It is equipped with a 51.6 ci 0.8 L engine. The listed engine power is Gasoline (listed): 27 hp / 20.1 kW. Transmission: 6 forward and 1 reverse. Operating weight: 2100 lbs 952 kg.
Engine Power
Gasoline (listed): 27 hp / 20.1 kW
Fuel & Capacities
Gasoline
Transmission
6 forward and 1 reverse
Operating Weight
2100 lbs
952 kg
Overview
 | 1974 - 1978
Tool Carrier tractor |
|---|
Production | |
|---|---|
Manufacturer | Hefty |
Tool Carrier tractor | |
Built in Juneau, Wisconsin, USA | |
Variants | |
|---|---|
Hi-G | high-crop tractor |
Hefty G Engine | |
|---|---|
Continental 0.8L 4-cyl gasoline | |
Engine details ...  |
Hefty G Transmission | |
|---|---|
6-speed gear | |
Transmission details ...  |
Hefty G Power | |
|---|---|
Engine | 27 hp
20.1 kW |
PTO (claimed) | 24 hp
17.9 kW |
Mechanical | |
|---|---|
Two-wheel drive | |
Steering | manual |
Steering | power OptOptional |
Mechanical disc brakes | |
Open operator station. | |
Hydraulics | |
|---|---|
Type | open center |
Pressure | 2000 psi
137.9 bar |
Valves | 2 |
Pump flow | 3.2 gpm
12.1 lpm |
Tractor hitch | |
|---|---|
Rear Type | I |
Power Take-off (PTO) | |
|---|---|
Rear PTO | independent OptOptional |
Rear PTO Type | 540 (1.375) |
1000 (1.375) | |
Mid PTO | independent OptOptional |
Mid PTO Type | 540 (1.375) |
1000 (1.375) | |
Dimensions & Tires | |
|---|---|
Wheelbase | 75 inches*Multipile position front axle allows for a wheelbase range of 75 to 89 inches.
190 cm |
Weight | 2100 lbs
952 kg |
Front tire | 5.00-15 |
Rear tire | 9.5-24 |
Full dimensions and tires ...  | |
Electrical | |
|---|---|
Ground | negative |
Battery volts | 12 |
References | |
|---|---|
 | |
G - Implements published by Hefty | |
G published by Hefty |
Engine
Engine Detail — 51.6 ci / 0.8 L Gasoline
Manufacturer | Continental R800-46 |
Fuel Type | Gasoline |
Configuration | 4-cylinder, liquid-cooled |
The Continental R800 engine was built by Renault. | |
Displacement | 51.6 ci
0.8 L |
Bore/Stroke | 2.28x3.14 inches
58 x 80 mm |
Power | 27 hp
20.1 kW |
Compression | 8:1 |
Rated RPM | 3300 |
Firing order | 1-3-4-2 |
Starter | electric |
Starter volts | 12 |
Transmission
Transmission — 6 forward and 1 reverse gear
Type | gear |
Gears | 6 forward and 1 reverse |
Clutch | mechanical dry disc |
With 9.5-24 rear tires. | |
 | |
Dimensions
Hefty G Tires | |
|---|---|
Ag front | 5.00-15 |
Ag rear | 9.5-24 |
Ag front | 6.50-16 |
Ag rear | 11.2-24 |
12.4-24 | |
12.4-28 | |
Dimensions | |
|---|---|
Wheelbase | 75 inches*Multipile position front axle allows for a wheelbase range of 75 to 89 inches.
190 cm |
Length | 126 inches*At closest wheelbase position.
320 cm |
Height (steering wheel) | 64 inches
162 cm |
Shipping weight | 2100 lbs
952 kg |
Front tread | 40 to 60 inches
101 to 152 cm |
Rear tread | 36 to 62 inches
91 to 157 cm |
Attachments
Attachment overview | |
|---|---|
60" mid-mount mower deck | |
Blade | |
The Hefty G had a range of attachments available including cultivators, sprayers, fertilizers, and planters by Stanhay and Gandy. |
60" Mower deck | |
|---|---|
Type | mid-mount Hefty |
3-blade | |
Cutting width | 60 inches
152 cm |
Photos
Hefty G tractor photo
Recommended Implements & Sizing Guide
Engineering recommendations for Hefty G based on its 27 HP power envelope and ASAE agricultural standards.
| Implement & Operation | Recommended Size | Workload Rating | Engineering Notes |
|---|---|---|---|
Moldboard PlowPrimary Tillage | 1 to 2 Bottom (12")1 - 2 铧 (30 cm) | Light Duty | Ideal for garden plots and light sandy soil. |
Rotary Cutter / MowerMowing & Clearing | 5 ft (60 in)1.5 m | Medium Duty | Pasture maintenance and weeds up to 1.5" diameter. |
Rotary TillerSeedbed Prep | 54 to 60 in135 - 150 cm | Medium Duty | Thorough seedbed preparation in orchards and vegetable plots. |
Disc HarrowSecondary Tillage | 5 to 6 ft (16-18" discs)1.5 - 1.8 m (40-45 cm 耙片) | Light Duty | Small acreage soil break-up and secondary aeration. |
Sizing & Soil Condition NoteActual implement sizing varies depending on local soil conditions (heavy clay vs sandy loam), field slope, and operating speed. Heavy tillage implements may require front ballast weights and wheel weights.
Fluids, Capacities & Working Autonomy
Standard fluid requirements, service intervals, and continuous runtime estimates for Hefty G.
Engine Crankcase Oil
SAE 15W-40 (Heavy Duty Diesel)
Standard Spec: API CK-4 / CJ-4 Heavy Duty
Service Interval: 150 – 250 Hours
Transmission & Hydraulic System
UTTO (Universal Tractor Transmission Oil)
Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)
Service Interval: 600 – 1000 Hours
Engine Cooling System
50/50 Ethylene Glycol Pre-mix
Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze
Service Interval: 2 Years / 1500 Hours
Hefty G Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for Hefty G.
Converted Equivalents:
Horsepower (HP)27 hp
Kilowatts (kW)20.1 kW
Metric Horsepower (PS / CV)27.4 PS
Direct Competitor Comparison
Compare Hefty G against same-era industry alternatives in the same horsepower class.
Current Model
Hefty
Hefty G
Engine Power:Gasoline (listed): 27 hp / 20.1 kW
★ Baseline Reference
Related models
Hefty F
- Power:
- 27
- Production years:
- 1974 - 1978
Hefty Hi-G
- Power:
- 27
- Production years:
- 1974 - 1978
Hefty LNT
- Power:
- 27
- Production years:
- 1974 - 1978