| Manufacturer | Allis Chalmers |
| Price | 39,378(USD) |
| Model | 7020 |
| Equipment Type | Row-Crop Tractors |
| Factory | West Allis, Wisconsin, USA |
NEBRASKA TRACTOR TEST 1259 2
| Description | Diesel Power shift 2WD October 10 - 21, 1977 Link: Nebraska Tractor Test 1259 file PTO performance Drawbar performance Gear 1F used for power test Gear 2S used for pull test |
| Power at rated engine speed | 123.79hp / 92.3kW |
| Fuel use | 7.8gal/hour / 29.5l/hour |
| Power at rated PTO speed | 123.50hp / 92.1kW |
| Max power | 101.89hp / 76.0kW |
| Max pull | 12,001lbs / 5443kg |
NEBRASKA TRACTOR TEST 1260 2
| Description | Diesel Power Director 2WD October 10 - 21, 1977 Link: Nebraska Tractor Test 1260 file PTO performance Drawbar performance Gear 4SL used for power test Gear 2SL used for pull test |
| Power at rated engine speed | 123.85hp / 92.4kW |
| Fuel use | 7.8gal/hour / 29.5l/hour |
| Power at rated PTO speed | 125.51hp / 93.6kW |
| Max power | 102.09hp / 76.1kW |
| Max pull | 11,964lbs / 5426kg |
ALLIS CHALMERS 7020 POWER
| Engine | 146hp / 108.9kW |
| Drawbar (claimed) | 106hp / 79.0kW |
| PTO (claimed) | 123hp / 91.7kW |
| Drawbar (tested) | 102.09hp / 76.1kW |
| PTO (tested) | 123.85hp / 92.4kW |
ENGINE DETAIL
The Allis Chalmers 7020 tractor features a robust 6-cylinder, 4.9L intercooled turbocharged diesel engine, delivering 146 hp at a rated RPM of 2300, ideal for demanding agricultural tasks. Its 16.25:1 compression ratio enhances efficiency, while the dry air cleaner with pre-cleaner helps maintain optimal performance in dusty environments. However, the 20-quart oil and 26-quart coolant capacities may necessitate more frequent maintenance checks, especially under heavy load conditions.
| Description | Allis Chalmers 649I intercooled turbocharged diesel 6-cylinder liquid-cooled Inline |
| Displacement | 301ci / 4.9L |
| Bore/Stroke | 3.875x4.25inches / 98x 108mm |
| Power | 146hp / 108.9kW |
| Air cleaner | dry with pre-cleaner |
| Compression | 16.25:1 |
| Rated RPM | 2300 |
| Firing order | 1-5-3-6-2-4 |
| Starter volts | 12 |
| Oil capacity | 20qts / 18.9L |
| Coolant capacity | 26qts / 24.6L |
ALLIS CHALMERS 7020 ENGINE
The Allis Chalmers 7020 is powered by a robust 4.9L 6-cylinder diesel engine, offering reliability and efficiency for heavy-duty tasks. With a standard fuel tank of 51 gallons, it provides extended operational range, making it advantageous for long hours in the field, and the optional 13-gallon auxiliary tank allows for additional fuel capacity. However, operators should note that the tractor's weight and size may limit maneuverability in tight spaces.
| Description | Allis Chalmers 4.9L 6-cyl diesel |
| Fuel tank | 51gal / 193.0L 13gal / 49.2L (optional auxiliary tank) |
TRANSMISSIONS OVERVIEW
The Allis Chalmers 7020 tractor features a robust 16-speed partial power shift transmission, enhancing operational efficiency and speed control during varied field conditions. The power shift capability allows for seamless gear changes under load, reducing productivity interruptions. However, potential challenges include complexity in repairs and maintenance compared to simpler transmission systems, making it essential for operators to have adequate mechanical knowledge or access to qualified technicians.
| Description | 16-speed partial power shift 20-speed partial power shift 12-speed partial power shift |
TRANSMISSION 1
The Allis Chalmers 7020 features a partial power shift transmission with 16 forward and 4 reverse gears, enhancing versatility for various field conditions. The dual-range capability allows operators to easily switch between slow and fast speeds, optimizing performance for tasks like tilling or hauling. However, the reliance on foot buttons for power shifting may demand a learning curve for operators unfamiliar with this control method.
| Transmission | Power Director |
| Type | partial power shift |
| Gears | 16 forward and 4 reverse |
| Oil capacity | 29.6qts / 28.0L |
| Description | Four gears in two ranges (slow/fast) with two-range power shift. Power shift controlled by foot buttons |
SPEEDS 1
| Description | With 18.4x38 rear tires |
TRANSMISSION 2
The Allis Chalmers 7020 features a partial power shift transmission with a total of 20 forward and 4 reverse gears, allowing for efficient speed and torque management across various field conditions. The dual-range capability (slow/fast) coupled with foot-operated power shift buttons enhances operator control and comfort during operation, making it suitable for diverse agricultural tasks. However, the relatively low oil capacity of 29.6 quarts (28.0L) may demand more frequent checks and maintenance, especially under heavy load scenarios.
| Transmission | Power Director |
| Type | partial power shift |
| Gears | 20 forward and 4 reverse |
| Oil capacity | 29.6qts / 28.0L |
| Description | Five gears in two ranges (slow/fast) with two-range power shift. Power shift controlled by foot buttons |
SPEEDS 2
| Description | With 18.4x38 rear tires |
TRANSMISSION 3
The Allis Chalmers 7020 features a partial power shift transmission, providing 12 forward and 2 reverse gears, which enhances operational flexibility and efficiency during diverse tasks. Its oil capacity of 29.6 quarts (28.0 liters) indicates a robust lubrication system, crucial for prolonged operation under heavy loads. However, the power shift mechanism may require maintenance and adjustment over time, so regular monitoring is advisable to ensure optimal performance.
| Transmission | Power Shift |
| Type | partial power shift |
| Gears | 12 forward and 2 reverse |
| Oil capacity | 29.6qts / 28.0L |
| Description | Six gears in two ranges. Power shift between gears in range |
SPEEDS 3
| Description | With 15.5x38 rear tires |
MECHANICAL
The Allis Chalmers 7020 tractor features a 4x2 2WD chassis, which may limit traction on uneven terrain compared to 4WD systems, making it ideal for less challenging agricultural tasks. The hydrostatic power steering enhances maneuverability, providing ease of handling in tight spaces, while the differential power wet disc brakes ensure reliable stopping power under load despite potential maintenance challenges. Its 16-speed, 20-speed, or 12-speed partial power shift transmissions offer versatility in speed selection, allowing for optimized performance across various field applications.
| Chassis | 4x2 2WD |
| Final drives | inboard planetary |
| Steering | hydrostatic power |
| Brakes | differential power wet disc |
| Cab | Acousta cab standard with heat. Air-conditioning optional. Radio and eight-track player optional |
| Transmissions | 16-speed partial power shift 20-speed partial power shift 12-speed partial power shift |
HYDRAULICS
| Type | closed center |
| Valves | 2 or 3 |
| Pump flow | 22gpm / 83.3lpm |
| Total flow | 45gpm / 170.3lpm |
| Steering flow | 9.5gpm / 36.0lpm |
TRACTOR HITCH
| Rear Type | 3/2 |
| Rear lift (at 24 | 6,680lbs / 3030kg |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Rear RPM | 540/1000 |
ALLIS CHALMERS 7020 TIRES
The Allis Chalmers 7020 tractor is equipped with variable rear tire options, allowing it to adapt to a range of agricultural applications, from compact field work to heavier towing tasks. The specified 10.00x16 front tires enhance maneuverability, while the larger rear tire configurations improve traction and stability on uneven terrain. However, operators should be mindful of tire selection based on soil conditions to avoid compaction and ensure optimal performance.
| Ag front | 10.00x16 |
| Ag rear | 24.5x32 / 30.5x32 / 20.8x34 / 15.5x38 / 16.9x38 / 18.4x38 / 20.8x38 |
DIMENSIONS
| Wheelbase | 106inches / 269cm |
| Length | 163inches / 414cm |
| Width | 92.6inches / 235cm 118.7inches / 301cm (optional long axle) |
| Ground clearance | 21inches / 53cm (front axle) 28inches / 71cm (rear axle) |
| Rear axle | 3.625inch diameter / 92mm |
ALLIS CHALMERS 7020 WEIGHT
| Shipping | 10,820lbs / 4907kg |
| Operating | 11,700lbs / 5307kg |
| Ballasted | 15,610lbs / 7080kg |
ALLIS CHALMERS 7020 HEIGHT
| Steering wheel | 87inches / 220cm |
| Hood | 68inches / 172cm |
| Exhaust | 116inches / 294cm |
DIMENSIONS & TIRES
The Allis Chalmers 7020 tractor features a 106-inch wheelbase, providing a stable platform for field operations, ideal for both row-crop work and heavy-duty tasks. Weighing between 10,820 to 11,700 pounds, the tractor offers good traction, but may encounter challenges in highly compacted or soft soil conditions. The tire specifications (11.00x16 front and 18.4x38 rear) enhance performance in about 60% of agricultural tasks, but may limit maneuverability in tight spaces.
| Wheelbase | 106inches / 269cm |
| Weight | 10820 to 11700 pounds |
| Front tire | 11.00x16 |
| Rear tire | 18.4x38 |
7020 SERIAL NUMBERS
| Location | Above PTO shield |
| 1978 | 1317 |
| 1979 | 2732 |
| 1980 | 3842 |
| 1981 | 4710 |