M420
Introduced in 1973, the M420 was MLW's first "square-body" road locomotive offering. Notably, the M420 was the first locomotive designed with a wide nose specifically-designed for enhanced crash safety: the "Canadian Comfort Cab." Other improvements included the first zero-weight transfer trucks and MLW's first usage of AAR control stands.
| General Info | - |
|---|---|
| Prime Mover | ALCO 12-251C |
| Horsepower | 2000 |
| Truck Type | Dofasco ZWT |
| Axles | 4 |
| Traction Motors | 4 |
| Minimum Weight | 240,000 lbs |
| Maximum Weight | 272,000 lbs |
| Model Base Speed | 65 MPH |
| Top Speed | 65, or 75 |
| Electrical System | - |
|---|---|
| Generator Max Current | 3600 Amps |
| Max Traction Motor (TM) Current | 1800 Amps |
| Max Continuous TM Current | 1195 Amps |
| Traction Motor Type | DC |
| Factor of Adhesion | 34.5% |
| Transition Mode | Automatic, no selector |
| Transition Groups | 2, 1 |
| Transition Shunts | 1, 1 |
| Generator Transition | No |
| Traction Control | APR + Sand |
| Dynamic Braking (DB) Mode (if used) | Mechanical Blowers @ 50% |
| DB Max Current | 900 Amps |
| DB Max Continuous Current | 900 Amps |
| Blended Braking | No |
| Miscellaneous | - |
|---|---|
| Head-End Power (HEP) | No |
| HEP Power Consumption | N/A |
| HEP Standby/Run Mode | N/A |
| Load Ramp Speed | 10 Amps/Tick |
| TM Overload Protection | No |
| Starter Mode | Latched Primer, Manual Start |
| Air Brake Schedule | 26-L |
| Compressor CFM | 225 (Wabco 3CDCBL @ 1000 RPM) |
| Main Reservoir Volume | 35.9 Cubic Feet |
⚠: Not Verified or Educated Guess