Athearn Genesis G88291 HO Scale EMD GP9B Conrail CR 3811 DCC and Sound UniTrack - Switch Tech Notes: RPM replacement bearings

Tech Notes: RPM replacement bearings are 20x32x7mm in size and only fit RPM 81732 Oversized Axle Carriers

The Standards Gauge pack also includes a plastic clearance gauge and usage instructions

5 grams of weight off of each A-arm

0mm Diameter 5

Atlas 596 HO Scale Code 83 Customline Mark IV Curved Turnout - Right

Athearn Genesis G88291 HO Scale EMD GP9B Conrail CR 3811 DCC and Sound UniTrack - Switch Tech Notes: RPM replacement bearingsAthearn Genesis G88291 HO Scale EMD GP9B Conrail CR 3811 DCC and Sound In 1949, EMD introduced the GP7. The basic design followed most diesel switchers with the addition of a short hood instead of an end cab. The hoods were also full height to better accommodate the diesel engine and mechanical and electrical components. In 1954 EMD upgraded the GP7 to become the 1,750 horsepower GP9. Externally, the first GP9s were virtually unchanged from the last