Operator HO Scale EMD SD40-2, Undecorated

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Product Description

The Operator series HO Scale SD40-2 is designed for modelers who enjoy running dimensionally accurate trains and are less concerned about factory applied detail parts (available separately). The model is based upon the Rivet Counter SD40-2 body tooling and smooth drive train. In fact, both lines share the same motor for maximum pulling power. All Operator models share the same low short hood, cab, long hood, and trucks to maintain a selling price starting at under $100. 


Prototype Specific ScaleTrains

  • Directional LED headlights
  • Printed and LED lighted number boards
  • Front EMD-style low pilot plow with MU hose doors
  • Large “blunt” front pilot anticlimber
  • Late “fixed” rear drop step
  • "Tall" stepwells with see-through steps
  • Sectioned treadplate detail on the walkways
  • 88" low short hood with wheel handbrake
  • Late cab sub-base doors with lift-off hinges
  • BN-style latched battery box doors with narrow louvers and lift-off hinges
  • Cab with bolted side window panels, sunshades, and long sunshade tracks
  • Cab interior
  • Leslie RS-3-L Horn mounted on the number board housing
  • Early electrical cabinet "zig-zag" seam
  • Welded ECAFB (late)
  • Intermediate inertial air intake grills with top drip rail
  • Standard-range dynamic brakes with batten strip and resistor grid detail
  • Corrugated radiator intake grills
  • See-through standard 48” radiator fan housings with fan blades visible inside
  • Notched pilot faces with lifting slots
  • Underbody frame rail
  • Tab-mount EFCO
  • Frame-mounted steel bell
  • 4,000 gallon fuel tank
  • Detailed HT-C trucks with Hyatt bearing caps, late center axle snubbers, and D-77 traction motor and air duct details
  • Dimensionally accurate truck centers
  • Semi-scale ScaleTrains.com Type E knuckle couplers
  • All-wheel drive
  • All-wheel electrical pick-up
  • Motor with 5-pole skew wound armature
  • Dual flywheels
  • Operates on Code 70, 83 and 100 rail
  • Packaging safely stores model
  • Pre-drilled for grab irons, coupler cut levers, MU cables, etc. - available in a separate upgrade kit (SXT80254)
  • Minimum radius: 18”
  • Recommended radius: 22” 
  • DCC & sound equipped locomotives also feature
    • ESU Essential Sound Unit DCC & Sound Factory Installed
    • Oval speaker
    • Operates on both DC and DCC layouts* 
  • DC/DCC & sound ready locomotives also feature
    • Operate using a DC power pack
    • DCC ready with 21-pin connector 

* some sound and lighting function on DCC & sound equipped models are not operable using DC



In January 1972, Electro-Motive Division (EMD) of General Motors would build the first production models of a locomotive design that would prove to be legendary: the SD40-2.  The flagship of the “Dash-2” series of 1972, the SD40-2 would build upon the lessons learned from its predecessor, the SD40.  While the sixteen-cylinder 645E3 turbocharged prime mover remained the same from its SD40 cousin, the SD40-2 boasted a modular, solid-state electrical system, which featured removable “cards” in place of troublesome relays in its high-voltage cabinet, greatly simplifying electrical troubleshooting and repairs. 

Externally, the biggest change was the use of the new HT-C three-axle truck in place of the Flexi-coil C of the SD40.  The new truck promised greater adhesion, and was longer than the Flexi-coil C, necessitating an increase of the length of the SD40-2s frame to an overall length of 68’, 10” over the couplers.  This also had the effect of giving the SD40-2 its characteristic long walkway “porches” at each end.  Other small external improvements, such as longer battery box compartments, rear overhang on the cab roof, and drip rail over the front cab door, added to the list of external differences between it and the SD40.

Domestic production of the SD40-2 continued until July 1984 making it one of EMD’s most popular locomotives of all time.  Many remain in service today, both with original owners as well as secondhand operators.  Within the last five years, Norfolk Southern and CSX have rebuilt hundreds of SD40-2s to extend their operating life.  This will ensure this venerable locomotive’s presence on U.S. rails for decades to come. 

DC/DCC Ready
Retail: $124.99
Our Selling Price: $99.99 

ESU Essential Sound Unit DCC & Sound Factory Installed
Retail: $189.99
Our Selling Price: $149.99


SKU Road Number & Sound Option Price Quantity
SXT10997 3161 / ESU LokSound DCC & Sound Equipped (Preorder) $149.99
SXT10998 3161 / Without Sound, DCC & Sound Ready (Preorder) $99.99

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