Athearn G31558 HO AC4400CW Locomotive – SP #336

Built between April and Nov of 1995, SP placed an order for 279 AC4400CW’s
from General Electric. Not only was this SP’s first dive into AC technology
but was their largest single locomotive order (and last) in history. GE set up a
maintenance shop in Denver CO to support these units. They featured Harris
Locotrol II equipment for use in DPU service; although they were used for
dedicated power on Colorado coal trains, they could also be found roaming the
system wherever they were needed.
ROAD NUMBER SPECIFIC FEATURES:
• #114 Unique spare knuckle box on rear pilot.
• #239 Unique spare knuckle box on rear pilot.
• #336 Unique additional handrail above capacitor box.

SP FEATURES:
• Nathan P-3 Horn
• High number boards
• Early body features
• Unevenly spaced rear grab irons
• Central air intake in forward position
• Early no-notch bolted on fuel tank
• Extended radiator hatch on engineer’s side
• Prime Air Dryer
• Vertical handrail behind invertor cabinet
• GE Hi-Adhesion trucks
• Modified outside struts on opposite sides of trucks
• Alternating flash front ditch lights (Effect in DCC)

PROTOTYPE SPECIFIC INFORMATION
Introduced by GE in 1993 and built until 2004, when it was replaced
by the Evolution Series Tier II compliant model, the AC4400CW is a
staple of modern railroading. 2,834 examples were built with many
still plying the rails in their as delivered configurations or as rebuilt
variations. Many Class 1, regional, and foreign railroads purchased the
AC4400CWs. Ownership spanned the North American Continent and
with their long lives, have seen numerous paint scheme variations and
ownership changes through the years. The AC4400CW went through
a large number of changes during its production. Some are easily
noticeable; early units being delivered with GE’s Hi-Adhesion Trucks,
while later units that had the option for newly developed GE Steerable
Truck. Other details are smaller and takes a careful eye to see; the
addition of a door stop, how the step wells are reinforced, or the number
and positioning of panels and doors.
Athearn has captured all these details thorough research and precision
tooling to reproduce dozens of variations. The newly tooled Genesis
AC4400CW takes its reign as the new flagship model for Athearn.

BRAND NEW GENESIS 2.0 TOOLING!

AC4400CW SERIES LOCOMOTIVE FEATURES:
• DCC-ready features Quick Plug™ plug-and-play technology with 21-pin
NEM connector
• Scaled from prototype resources including drawings, field
measurements, photographs, and more
• Accurately –painted and –printed paint schemes
• LED lighting adjusted to lifelike settings.
• Illuminated number boards
• Illuminated ground lights above front trucks
• Illuminated front and rear walkway lights
• Illuminated marker lights (where applicable)
• Etched, see-through walkway steps
• Animated roller bearing caps
• Coupler cut levers
• Flexible rubber MU hoses for durability
• Flexible rubber trainline hose
• See-through cab windows
• Full cab interior
• Walkway tread
• Fine-scale Celcon handrails for scale appearance
• Windshield wipers
• Lift rings
• Wire grab irons
• Detailed fuel tank with fuel fillers, fuel gauges, & breather pipes
• Sander lines
• Brass horns correct to the prototype
• McHenry® scale knuckle couplers – Kadee compatible
• Genesis driveline with 5-pole skew wound motor, precision machined
flywheels, and multi-link drivetrain
• All-wheel drive with precision gears for smooth & quiet operation
• All-wheel electrical pickup provides reliable current flow
• Wheels with RP25 contours operate on all popular brands of track
• Heavy die-cast frame for greater traction and more pulling power
• Packaging securely holds model for safe storage