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Athearn G9152 HO UP 4-8-8-4 Big Boy Steam Locomotive with DCC & Sound #4005 EX/Box

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Athearn G9152 HO UP 4-8-8-4 Big Boy Steam Locomotive with DCC & Sound #4005 EX/Box

This is an Athearn G9152 HO Scale Union Pacific 4-8-8-4 Big Boy #4005 equipped with DCC and Sound. One of the most powerful steam locomotives ever built, the Union Pacific Big Boy remains an icon of American railroading, and this highly detailed model captures its imposing presence and mechanical complexity with remarkable precision.

The Athearn Big Boy features a fully detailed boiler backhead complete with printed gauges, along with numerous individually applied parts including piping, valves, and generators for an authentic, three-dimensional appearance. Both sets of driving wheels feature operating eccentric cranks that move in the correct direction, replicating the intricate motion of the real locomotive’s massive running gear. The cab is outfitted with adjustable windows, while directional lighting illuminates the headlights and number boards depending on travel direction.

Powering this model is a smooth-running five-pole skew-wound motor with dual flywheels, providing reliable performance and exceptional low-speed control. The locomotive’s front and rear engines pivot independently, allowing it to navigate curves as tight as a 22-inch radius with ease. Additional realism is provided by see-through running boards and a smoke unit-ready design that requires no soldering for installation. Combining detailed craftsmanship with modern DCC and sound technology, the Athearn Big Boy #4005 delivers both visual impact and outstanding performance—making it a centerpiece for any Union Pacific or steam-era model railroad collection.

This item has been graded per TCA standards C-7: Excellent based on visual appearance. The locomotive is non-functional due to heavy zinc rot on the draw-bar. The engine is being sold As-Is as a result. These items show some scratches and spots of paint loss on the shell and chassis. The instruction manual is included. The original box is included. Please check the photos for a detailed look at this item. Overall condition is Excellent.

Condition: Excellent (C-7)
Operational Status: As is
Original Box: Yes (P-6)

Manufacturer: Athearn
Model Number: G9152
Road Name: Union Pacific (UP)

Scale/Era: HO Scale
Model Type: Steam Loco


The Trainz SKU for this item is 6212832.

Trainz Product Id: 12091897
$97.71

Original: $325.70

-70%
Athearn G9152 HO UP 4-8-8-4 Big Boy Steam Locomotive with DCC & Sound #4005 EX/Box—

$325.70

$97.71

Product Information

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Description

This is an Athearn G9152 HO Scale Union Pacific 4-8-8-4 Big Boy #4005 equipped with DCC and Sound. One of the most powerful steam locomotives ever built, the Union Pacific Big Boy remains an icon of American railroading, and this highly detailed model captures its imposing presence and mechanical complexity with remarkable precision.

The Athearn Big Boy features a fully detailed boiler backhead complete with printed gauges, along with numerous individually applied parts including piping, valves, and generators for an authentic, three-dimensional appearance. Both sets of driving wheels feature operating eccentric cranks that move in the correct direction, replicating the intricate motion of the real locomotive’s massive running gear. The cab is outfitted with adjustable windows, while directional lighting illuminates the headlights and number boards depending on travel direction.

Powering this model is a smooth-running five-pole skew-wound motor with dual flywheels, providing reliable performance and exceptional low-speed control. The locomotive’s front and rear engines pivot independently, allowing it to navigate curves as tight as a 22-inch radius with ease. Additional realism is provided by see-through running boards and a smoke unit-ready design that requires no soldering for installation. Combining detailed craftsmanship with modern DCC and sound technology, the Athearn Big Boy #4005 delivers both visual impact and outstanding performance—making it a centerpiece for any Union Pacific or steam-era model railroad collection.

This item has been graded per TCA standards C-7: Excellent based on visual appearance. The locomotive is non-functional due to heavy zinc rot on the draw-bar. The engine is being sold As-Is as a result. These items show some scratches and spots of paint loss on the shell and chassis. The instruction manual is included. The original box is included. Please check the photos for a detailed look at this item. Overall condition is Excellent.

Condition: Excellent (C-7)
Operational Status: As is
Original Box: Yes (P-6)

Manufacturer: Athearn
Model Number: G9152
Road Name: Union Pacific (UP)

Scale/Era: HO Scale
Model Type: Steam Loco


The Trainz SKU for this item is 6212832.

Trainz Product Id: 12091897