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Allis ChalmersModel A
Allis Chalmers HD14
Crawler
- power
- Not recorded
- displacement
- 426 ci
- Cylinders
- 6
- Forward gears
- 6
Head to head · Crawler
Crawler

Crawler
How they compare
HD14 is in the 48th percentile; Challenger 55 is in the 49th · 191 models
HD14 is in the 50th percentile; Challenger 55 is in the 50th · 192 models
HD14 is in the 34th percentile; Challenger 55 is in the 69th · 179 models
HD14 is in the 65th percentile; Challenger 55 is in the 58th · 173 models
Full comparison
| Spec | Allis Chalmers HD14 | Claas Challenger 55 | Difference |
|---|---|---|---|
| Manufacturer | Allis Chalmers | Claas | — |
| Model | HD14 | Challenger 55 | — |
| Category | Crawler | Crawler, Agricultural | — |
| Spec | Allis Chalmers HD14 | Claas Challenger 55 | Difference |
|---|---|---|---|
| Manufacturer | General Motors | Caterpillar | — |
| Model | Jun-71 | 3126 | — |
| Rated RPM | 1,500RPM | 2,100RPM | ▲ Challenger 55+600 RPM · +40% |
| Cylinders | 6 | 6 | Same |
| Displacement | 426ci | 442ci | ▲ Challenger 55+16 ci · +4% |
| Bore | 4.3in | 4.3in | Same |
| Stroke | 5in | 5in | Same |
| Spec | Allis Chalmers HD14 | Claas Challenger 55 | Difference |
|---|---|---|---|
| Type | Gear-driven | Full Power Shift | — |
| Spec | Allis Chalmers HD14 | Claas Challenger 55 | Difference |
|---|---|---|---|
| Length | 165in | 211in | ▲ Challenger 55+46 in · +28% |
| Width | 92in | 91in | ▲ HD14+1 in · +1% |
| Height | 80in | 125in | ▲ Challenger 55+45 in · +56% |
| Operating Weight | 28,750lb | 26,000lb | ▲ HD14+2,750 lb · +11% |
| Spec | Allis Chalmers HD14 | Claas Challenger 55 | Difference |
|---|---|---|---|
| System Type | Not recorded | Variable-displacement Load-sensing Pressure-compensated | — |
| Steering Type | Not recorded | Differential Power | — |
| Spec | Allis Chalmers HD14 | Claas Challenger 55 | Difference |
|---|---|---|---|
| Hitch Category | Not recorded | III/II | — |
| Hitch Position | Not recorded | Rear | — |
| Spec | Allis Chalmers HD14 | Claas Challenger 55 | Difference |
|---|---|---|---|
| Chassis Type | Crawler | Crawler | Same |
| Drive Type | Track | Not recorded | — |
| Steering Type | Not recorded | Differential Power | — |
| Spec | Allis Chalmers HD14 | Claas Challenger 55 | Difference |
|---|---|---|---|
| Battery Voltage | Not recorded | 12V | — |
| Starter Type | Electric | Electric | Same |
| Spec | Allis Chalmers HD14 | Claas Challenger 55 | Difference |
|---|---|---|---|
| Coolant | 12gal | 8.6gal | ▲ HD14+3.4 gal · +40% |
| Spec | Allis Chalmers HD14 | Claas Challenger 55 | Difference |
|---|---|---|---|
| Type | Not recorded | Cab | — |
Category context