Alco PA-4 (Remanufactured by Morrison-Knudsen) |
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| Data Sheet Information Compiled by: JEAN-DENIS BACHAND |
| New: 12 March 2005 |
Drawing by: Jacques Belanger |
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| Engine Builder: American Locomotive Co. |
Engine: 4-cycle Model 251F V12 |
| Bore & Stroke |
9" X 10.5" |
| RPM (maximum / minimum) |
1025 / 400 |
| Main Generator: GE 5GT566E5 |
Horsepower: 2400 |
| Trucks: Trimount |
Configuration: A-1-A |
| Gear Ratio: 61:22 |
Speed: 102 mph |
| Weight: 212,000 lbs (approx.) |
Traction Motors: GE 752 (Four) |
| Traction Motor Blowers: Stuart |
Type and Number: Mechanical Driven - Two |
| Tractive Effort (starting) 53,000 lbs @ 25% |
Tractive Effort (continuous): 33,0600 Lbs. @ 11 mph |
| Multiple Unit Capability: Yes |
Dynamic Braking: Yes |
| Auxilary Generator: GE 5GY27A |
Alternator: -- |
| Air Brake: Westinghouse |
Model: 26L |
| Compressor: Westinghouse |
Model: 3CDB |
| Boiler Type: Steam (Vapor-Clarkson) |
PSI: 275 (3000 lbs capacity) |
| Quantity Built: 4 Cab units |
Date: February 1975 to May 1975 |
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| Exterior Dimensions
| Cab Unit |
| Total Length |
65'-08" |
| Pilot to Pilot |
63'-03" |
| Wheel Diameter |
42" |
| Truck Wheel Base |
15'-06" |
| Height to Top Engine Hood |
15'-02" |
| Height to Top Cab Hood |
14'-00" |
| Cab Width |
10'-06" |
| Walkway Width |
None |
| Engine Hood Width |
9'-10" |
| Center Bolster |
34'-02" |
| Center Front Truck to Front Pilot |
16'-00" |
| Center Rear Truck to Rear Pilot |
13'-02" |
| Distance between Truck Centers |
49'-08" |
| Minimum Turning Radius |
21 degrees |
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| Fuel Oil: 1500 Gallons |
Lubricating Oil: 250 Gallons |
| Engine Cooling Water: 280 Gallons |
Sand Capacity: 29 Cubic Feet |
Equipment & Options:
- Fuel Oil Heater
- Speed Recorder
- Oscillating Headlight
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Note: Two of the four units are still in existence and are being restored. One unit will go to the Smithonsian Institute and
the other will be privately owned.
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Reference Sources:
- D&H Mechanical Data Book
- The PA Book by William S. Young
- PA4 Locomotive by Norman E. Anderson and G.G. MacDermot
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