Allis Chalmers HD7W vs David Brown 990 - compare
Compare tractors: Allis Chalmers HD7W vs David Brown 990
Allis Chalmers HD7W vs David Brown 990 compare - general information
| Specs | Allis Chalmers HD7W | David Brown 990 |
|---|---|---|
| Brand | Allis Chalmers | David Brown |
| Model | Allis Chalmers HD7W | David Brown 990 |
| Series | n.d. | n.d. |
| Previous model | – | – |
| Next model | – | – |
| Smaller | – | – |
| Larger | – | – |
| Years | from 1940 to 1950 y. | from 1961 to 1980 y. |
| Cab with ROPS | No | No |
| Reviews | Allis Chalmers HD7W reviews New! | David Brown 990 reviews New! |
Allis Chalmers HD7W vs David Brown 990 - performance
| Specs | Allis Chalmers HD7W | David Brown 990 |
|---|---|---|
| Maximum power (HP / kW) | n.d. | n.d. |
| Engine RPM | 1500 rpm | 2200 rpm |
| Fuel consumption | n.d. | n.d. |
| Fuel tank capacity | n.d. | n.d. |
| Max. speed | n.d. | n.d. |
Allis Chalmers HD7W vs David Brown 990 - engine
| Specs | Allis Chalmers HD7W | David Brown 990 |
|---|---|---|
| Fuel type | Diesel | Diesel |
| Engine producer | General Motors | n.d. |
| Engine model | General Motors 3-71 | David Brown |
| Engine type | Diesel (diesel engine) | Diesel (diesel engine) |
| Engine capacity | 3.5 l. | 3.204 l. |
| Strokes, qty | n.d. | n.d. |
| Cylinders | 3 | 4 |
| Compression | n.d. | n.d. |
| Bore | 108 mm | 100 mm |
| Stroke | 127 mm | 102 mm |
| Maximum torque | n.d. | n.d. |
| Air filter | n.d. | n.d. |
| Fuel filter | n.d. | n.d. |
| Fuel filter chambers, qty | n.d. | n.d. |
| Oil filter | n.d. | n.d. |
| Oil pump | n.d. | n.d. |
| Speed control (control) | n.d. | n.d. |
| Injection pump | n.d. | n.d. |
| Injectors | n.d. | n.d. |
| Injection pressure | n.d. | n.d. |
| Cooling system | n.d. | liquid cooled engine |
| Forced cooling | n.d. | n.d. |
| Cooler | Yes | |
| Thermostat | Yes | |
| Cooler type | tubular-plate cooler | |
| Coolant system capacity | n.d. | n.d. |
| Clutch | n.d. | n.d. |
Allis Chalmers HD7W vs David Brown 990 - turbocharger
| Specs | Allis Chalmers HD7W | David Brown 990 |
|---|---|---|
| Turbocharger | Yes | No |
| Dual turbocharger | No | Not applicable |
| Intercooler | No | Not applicable |
| Aftercooler | No | Not applicable |
| Wastegate valve | No | Not applicable |
| Variable geometry | No | Not applicable |
| Additional parameters | – | – |
Allis Chalmers HD7W vs David Brown 990 - electronics
| Specs | Allis Chalmers HD7W | David Brown 990 |
|---|---|---|
| Supply voltage starter (V) | 12 V | 12 V |
| Ground | n.d. | n.d. |
| Battery (V) | 6 V | 12 V |
| Battery, qty | 0 | 1 |
| Charging system | Generator | Generator |
| Charging system producer | n.d. | n.d. |
| Ignition | Manual | Manual |
| Rear stop lamp | Yes | Yes |
| Rear agricultural lamp | n.d. | n.d. |
| Cock lamp | No | No |
Allis Chalmers HD7W vs David Brown 990 - PTO
| Specs | Allis Chalmers HD7W | David Brown 990 |
|---|---|---|
| PTO rpm | n.d. | n.d. |
| PTO control | n.d. | n.d. |
Allis Chalmers HD7W vs David Brown 990 - brakes
| Specs | Allis Chalmers HD7W | David Brown 990 |
|---|---|---|
| ABS | No | No |
| Brake assist | No | No |
| Braking system | n.d. | n.d. |
| Differential | No | Yes |
| Brake type | n.d. | mechanical |
| Discs | – | – |
Allis Chalmers HD7W vs David Brown 990 - dimensions
| Specs | Allis Chalmers HD7W | David Brown 990 |
|---|---|---|
| Weight | from 6350 kg (depending by model) | from 2222 kg to 3717 kg (depending by model) |
| Weight with ROPS | n.d. | n.d. |
| Weight with cab | n.d. | n.d. |
| Length | 3251 mm | 3200 mm |
| Height | 1753 mm | n.d. |
| Width | 2057 mm | 1702 mm |
| Clearance | n.d. | n.d. |
| Rear clearance | n.d. | n.d. |
| Front track width | n.d. | n.d. |
| Rear track width | n.d. | n.d. |
| Wheelbase | n.d. | 2000 mm |
| Front tires | n.d. | 6-19 |
| Rear tires | n.d. | n.d. |
| Max. mass of the trailer without brakes | 1500 kg | 1500 kg |
| Max. mass of the trailer with brakes | n.d. | n.d. |
| Max. axle load | n.d. | n.d. |
| Max. total weight | n.d. | n.d. |
| Turning radius | n.d. | n.d. |
Allis Chalmers HD7W vs David Brown 990 - drive
| Specs | Allis Chalmers HD7W | David Brown 990 |
|---|---|---|
| Drive system | (depending by model) | 4x2, 2WD (depending by model) |
| Additional | one wheel drive | |
| Permanent 4-wheel drive | n.d. | n.d. |
| Permanent systems that constantly power all the wheels | n/a | n/a |
| Dynamic allocation of power between the axles | n/a | n/a |
| Independent Link Suspension | None | None |
| Articulated suspension | – | – |
| Crawler drive | Yes | No |
| Hydrostatic steering | No | No |
| Differential | n.d. | n.d. |
| Steering | rod | rod |
| Front rods | n.d. | n.d. |
| Rear planetary drives | n.d. | n.d. |
| Front planetary drives | n.d. | n.d. |
Allis Chalmers HD7W vs David Brown 990 - hydraulics
| Specs | Allis Chalmers HD7W | David Brown 990 |
|---|---|---|
| Three-point hitch | n.d. | n.d. |
| Three-point hitch type | n.d. | n.d. |
| Three-point hitch performance | n.d. | n.d. |
| Three-point hitch pressure | n.d. | n.d. |
| Load Sensing | No | No |
| Closed | n.d. | n.d. |
| Central | No | No |
| Constant flow | No | No |
| Constant pressure | No | No |
| Control system | n.d. | n.d. |
| Pump | n.d. | n.d. |
| Two-section distributor | n.d. | n.d. |
| Quick couplings | n.d. | n.d. |
| Auto Lift | n.d. | n.d. |
Allis Chalmers HD7W vs David Brown 990 - transmission
| Specs | Allis Chalmers HD7W | David Brown 990 |
|---|---|---|
| Synchronous transmission | n.d. | Yes |
| Transmission mechanically synchronized | n/a | n/a |
| PowerShift | No | No |
| PowerShuttle | No | No |
| Additional | – | – |
| Hydrostatic transmission | n.d. | n.d. |
| Forward gears | 4 | 6 |
| Reverse gears | 1 | 2 |
| Creeper | n.d. | n.d. |
Allis Chalmers HD7W vs David Brown 990 - equipment
| Specs | Allis Chalmers HD7W | David Brown 990 |
|---|---|---|
| Clevis | Yes (???) | Yes (???) |
| Lower catch | n.d. | n.d. |
| Air conditioning | n.d. | n.d. |