MDC HO Scale Coupler Conversions

The perfect solution for all of your coupler woes. Thanks to our extensive list of HO Scale coupler conversions, it's easier than ever to fit Kadee® Couplers onto your locomotives and rolling stock. Our conversions typically require the least modification to your model, and the How-To Instructions and diagrams make fitting your new couplers a breeze. Remember to always check your coupler heights with our #206 Coupler Height Gauge. We've done the hard work for you, so find the perfect coupler in the list below.*

  Whisker® Metal Coupler Standard Coupler Other Coupler Options

0-6-0 Yard Hog (Metal)

0-6-0 Yard Hog (Metal) Conversion

with a

 
 

0-6-0 Switcher (Old)

0-6-0 Switcher (Old) Conversion

with a

 

0-6-0 Switcher (New)

0-6-0 Switcher (New) Conversion
 
 

2-6-0 Mogul (Old)

2-6-0 Mogul (Old) Conversion

with a

 

2-6-0 Mogul (New)

2-6-0 Mogul (New) Conversion
 
 

2-6-2 Prairie (Old)

2-6-2 Prairie (Old) Conversion

with a

 

2-6-0 Mogul (New)

2-6-2 Prairie (New) Conversion
 
 

2-8-0 Consolidation (Old)

2-8-0 Consolidation (Old) Conversion

with a

 

2-8-0 Consolidation (New)

2-8-0 Consolidation (New) Conversion
 
 

4-4-2 Atlantic (Old)

4-4-2 Atlantic (Old) Conversion

with a

 

4-4-2 Atlantic (New)

4-4-2 Atlantic (New) Conversion
 
 

4-6-0 Ten Wheeler (Old)

4-6-0 Ten Wheeler (Old) Conversion

with a

 

4-6-0 Ten Wheeler (New)

4-6-0 Ten Wheeler (New) Conversion
 
 

Climax

Climax Conversion
Any Medium Centerset Coupler

Shay

Shay Conversion
 
 

Alco RS-3

Alco RS-3 Conversion
Any Medium Centerset Coupler

Box Cab Diesel

Box Cab Diesel Conversion
Any Medium Centerset Coupler

EMD Model 40 “Critter”

 
 

Track Cleaner

Track Cleaner Conversion
Any Medium Centerset Coupler

All Rolling Stock

All Rolling Stock Conversion
Any Medium Centerset Coupler

All Rolling Stock (Old Time)

All Rolling Stock (Old Time) Conversion
 
 

Hopper, Sand (Metal)

Hopper, Sand (Metal) Conversion

with a

 
 

Ore Car (Older Metal)

Ore Car (Older Metal) Conversion
 
 

Pullman Palace Cars

Pullman Palace Cars Conversion
Any Medium Centerset Coupler

Harriman Passenger Cars

Harriman Passenger Cars Conversion
Any Medium Centerset Coupler

Old-Time Passenger Cars 50’

Old-Time Passenger Cars 50’ Conversion
Any Medium Centerset Coupler

Anywhere a NO.5® is listed, the #28, #58 or #118, #119, #158, #148 Whisker® Coupler can be used in its place.

Shallow cast-on gearbox fix: If you have a Kadee® Coupler that is not moving freely back and forth in a shallow cast-on gearbox. This is because some clone knuckle coupler manufacturers started molding shallow cast-on gearboxes on their models to try to fix the problems with their drooping clone knuckle couplers. The fix is a simple one. You have to file the top of the coupler shank a few strokes with a file, usually just enough to remove the black coloring to make the Kadee coupler function correctly in the non-standard shallow cast-on gearbox.

*Our conversions are based on only one model from a production run; there may be inconsistencies in a model’s production run that require a different coupler or model modifications to achieve the proper coupler height for coupler function.

** Metal Coupler Note: It is not recommended to use a metal coupler directly on a metal surface to avoid the possible electrical crossover or shorting that may cause damage.