
Allis ChalmersModel A
Allis Chalmers 7040
Row Crop
- power
- 151 hp
- displacement
- 426 ci
- Cylinders
- 6
- Forward gears
- 20
Head to head · Row Crop

Row Crop
Row Crop
How they compare
7040 is in the 58th percentile; 7120 is in the 58th · 1,206 models
7040 is in the 72nd percentile; 7120 is in the 87th · 1,409 models
7040 is in the 50th percentile; 7120 is in the 50th · 1,417 models
7040 is in the 70th percentile; 7120 is in the 61st · 1,200 models
Full comparison
| Spec | Allis Chalmers 7040 | CaseIH 7120 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | CaseIH | — |
| Model | 7040 | 7120 | — |
| Category | Row Crop | Row Crop | Same |
| Spec | Allis Chalmers 7040 | CaseIH 7120 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | CDC | — |
| Model | 3500 Mark II | Not recorded | — |
| Power Output | 151hp | 150hp | ▲ 7040+1 hp · <1% |
| Rated RPM | 2,300RPM | 2,200RPM | ▲ 7040+100 RPM · +5% |
| Cylinders | 6 | 6 | Same |
| Displacement | 426ci | 505ci | ▲ 7120+79 ci · +19% |
| Bore | 4.3in | 4.5in | ▲ 7120+0.2 in · +5% |
| Stroke | 5in | 5.3in | ▲ 7120+0.3 in · +6% |
| Spec | Allis Chalmers 7040 | CaseIH 7120 | Difference |
|---|---|---|---|
| Type | Partial Power Shift | Full power shift | — |
| Spec | Allis Chalmers 7040 | CaseIH 7120 | Difference |
|---|---|---|---|
| Length | 174in | 191in | ▲ 7120+17 in · +10% |
| Width | 95.5in | Not recorded | — |
| Height | 116in | 118in | ▲ 7120+2 in · +2% |
| Operating Weight | 11,700lb | 15,920lb | ▲ 7120+4,220 lb · +36% |
| Spec | Allis Chalmers 7040 | CaseIH 7120 | Difference |
|---|---|---|---|
| System Type | Closed Center | Closed center pressure flow compensated (PFC) | — |
| Steering Type | Hydrostatic Power | Hydrostatic power | Same |
| Spec | Allis Chalmers 7040 | CaseIH 7120 | Difference |
|---|---|---|---|
| Type | Independent | Independent with wet disc clutch | — |
| Speed 1 | 540rpm | 1,000rpm | ▲ 7120+460 rpm · +85% |
| Speed 2 | Not recorded | 540rpm | — |
| Spec | Allis Chalmers 7040 | CaseIH 7120 | Difference |
|---|---|---|---|
| Front Tire Size | 11.00-16 | Not recorded | — |
| Rear Tire Size | 18.4-38 | Not recorded | — |
| Spec | Allis Chalmers 7040 | CaseIH 7120 | Difference |
|---|---|---|---|
| Hitch Type | Three-Point Hitch | III/IIIN | — |
| Hitch Category | III/II | Category 3 | — |
| Hitch Position | Rear | Rear | Same |
| Hitch Capacity | Not recorded | 7,695lb | — |
| Spec | Allis Chalmers 7040 | CaseIH 7120 | Difference |
|---|---|---|---|
| Chassis Type | 4x2 2WD | 4x2 2WD | Same |
| Drive Type | 2WD | 2WD | Same |
| Steering Type | Hydrostatic Power | Hydrostatic power | Same |
| Brake Type | Differential Hydraulic Wet Discs | Differential hydraulic wet disc | — |
| Spec | Allis Chalmers 7040 | CaseIH 7120 | Difference |
|---|---|---|---|
| Starter Type | Electric | Electric | Same |
| Spec | Allis Chalmers 7040 | CaseIH 7120 | Difference |
|---|---|---|---|
| Coolant | 7.8gal | 7.5gal | ▲ 7040+0.3 gal · +4% |
| Spec | Allis Chalmers 7040 | CaseIH 7120 | Difference |
|---|---|---|---|
| Type | Acousta-Cab | Silent Guardian II Cab | — |
Category context