The leader in HO scale trucks that were manufactured in the era 1930 to 1960...
Landing Gear
Fifth Wheel Mounting on a Tractor & Landing Gear for a Trailer
How close to the cab should the fifth wheel be mounted? Where does the king pin get installed on the trailer? How far back does the landing gear have to be installed so it will clear the tractor tires? This PDF has scale drawings and dimensions to help you.
Click on attachment for the PDF attachment
