Introduction

Athearn RTR 71846 HO Scale EMD SD40T-2 Ex-SP Union Pacific 8855 DCC & Sound

The SD40T-2 is a 6-axle diesel-electric locomotive built by General Motors Electro-Motive Division having a 16-cylinder EMD 645E3 diesel engine producing 3,000 horsepower (2,240 kW). 312 SD40T-2s were built for North American railroads between April 1974 and July 1980. This locomotive and the SD45T-2 are popularly called tunnel motors, but EMDs term is SD40-2s with cooling system modifications because they were designed for better engine cooling in tunnels. The difference between this locomotive and its non-tunnel motor cousin, the SD40-2, are the radiator intakes and radiator fan grills located at the rear of the locomotive. The radiator air intakes in this model were along the deck to allow more fresh, cooler air to enter and less hot exhaust fumes lingering around the tunnels ceiling.

After the 1996 merger with SP, UP inherited both former SP and Rio Grande power. While waiting to be repainted or sold off, UP added a simple patch and new road number. Many of these units kept their faded colors for years.

FEATURES:

• Modified L Window cab
• Removed SP light package
• Front large anticlimber
• Exhaust silencer
• Faded colors
• 88 nose with no class lights
• Hood-mounted Nathan 3-chime horn
• FWD ditch lights
• Extended range dynamic brakes
• 4,500 gallon fuel tank
• Fine scale handrails
• Photo-etched windshield wipers
• Separately applied air tanks
• LED Lighting
• HTC truck sideframes
• See-through cab windows
• Welded electrical cabinet air filter box
• All-wheel electrical pickup
• See-through dynamic brake fans
• Mushroom nose vent on right side
• Separately applied wire grab irons
• Rubber trainline and MU hoses with silver ends
• Late Dash-2 cab, front window arrangement per prototype
• See-through radiator grilles with new rear truck gearbox specific for the tunnel motor
• Speed recorder attached to appropriate axle per prototype
• McHenry operating scale knuckle couplers
• All-wheel drive with precision gears for smooth and quiet operation
• 5-pole motor with flywheels and multi-link drivetrain for trouble-free operation
• Chassis accepts Genesis motor retro fit kit for an even higher performance motor
• DCC Ready 21-pin NEM Quick Plug technology
• Nickel plated, blackened machined wheels
• Wheels with RP25 contours operate on all popular brands of track
• Highly-detailed, injection molded body
• Minimum radius: 18 Recommended radius: 22
• SOUND-EQUIPPED MODELS ALSO FEATURE:
• Onboard DCC decoder with SoundTraxx Econami sound
• Sound units operate in both DC and DCC
• Full DCC functions available when operated in DCC mode
• Engine, horn, and bell sounds work in DC
• All functions NMRA compatible in DCC mode
• Excellent Slow speed control
• Effect lighting (if applicable) using F5 and/or F6
• Program a multiple unit (MU) lashup with lead unit only horn, bell, and lights
• Many functions can be altered via Configuration Value (CV) changes

SPECIFICATIONS:

• Era: 1991-2012
• Prototype Manufacturer: EMD
• Lighted: LED
• Sound: Econami
• Sub Brand: ATHEARN
• Minimum Radius: 18″ (457 mm)
• Reporting Mark: PFG/UP
• Axles: 6
• Full Road Name: Union Pacific (Ex-SP)
• Scale: HO
• DCC: Equipped