| Morrison-Knudsen TE56-4a | 
|  | 
| Data Sheet Information Compiled by:   Jean-Denis Bachand | 
| New: 7 Novembr 2008 | Artwork by:  Jean-Denis Bachand | 
| - | 
| Builder: ALCO/MLW | Engine:  251B | 
| Cycle:  4 | Bore & Stroke: 9 X 10 | 
| RPM Max/Min: | 1025 / 350 | 
| Type: V12 | Total Horsepower:  1600 | 
| Main Generator: GE | Model:  581 | 
| Gear Ratio: 74:18 | Speed: 65 mph | 
| Trucks:   4-Wheel | Configuration: B-B | 
| Traction Motor Blowers: 2 | Model: Mech Drive | 
| Weight: 247,000 lbs | Traction Motors: GE 753 (4) | 
| Tractive Effort (starting) 60,000 lbs @ 25% | Tractive Effort (continuous): 52,500 lbs @ 10.0 mph | 
| Multiple Unit Capability: Yes | Dynamic Braking:  Yes | 
| Auxilary Generator:  GE GMG139 GY24 | Alternator:  n/a | 
| Air Compressor:  Westinghouse | Model:  3CDC | 
| Air Brake:  Westinghouse | Model:  26L | 
| Quantity Built:  10 | Dates: 9/1974 to 3/1976 | 
| - | - | 
| Exterior Dimensions | TE56-4a | 
| Total Length | 55'-11.2" | 
| Wheel Diameter | 40" | 
| Truck Wheel Base | 9'-00" | 
| Height to Top Hood | 14'-06" | 
| Height to Top Cab | 14'-05.2" | 
| Cab Width | 10'-00" | 
| Hood Width | 9'-11.2" | 
| Height of Walkway | 7'-10" | 
| Walkway Width | 5'-00" | 
| Center Bolster | 30'-00" | 
| Center Front Truck to Front Pilot | 9'-03.2" | 
| Center Rear Truck to Rear Pilot | 8'-09.2" | 
| Distance between Truck Centers | 39'-04" | 
| Minimum Turning Radious | 30 degrees | 
| - | - | 
| Fuel Oil:  3200 | Lubricating Oil:  111 | 
| Engine Cooling Water: 70.5 | Sand Capacity:  26 cu. ft. | 
| Options: 
TECU controls each traction motor
IGBT Controls (liquid-cooled)
Engine turbocharged and aftercooled
Tier 2 EPA Emission Level | 
| - | 
| 
Contemporary Diesel Spotter's Guide by Louis A. Marre and Jerry A. Pinkepank 
Contemporary Diesel Update by Louis A. Marre and Jerry A. Pinkepank 
Delaware & Hudson by Jim Shaughnessy (second edition)  |