The photo shows the finished lead truck and all 8 drive wheels.
The axles were pressed into the right hand drive wheels with a .002/.003 interference fit (don’t forget to slide the bearings on first). The left hand wheels are a close slip fit to allow the gauge to be changed from 7-1/4 to 7-1/2 inches.
My intention was to make the drivers a right hand lead, but when I got the wheel sets assembled, I realized they were left hand leading. The critical back to back dimension, while in specification on the axles is slightly oversize at the flange on two of the wheel sets. I will trim a small amount from the left side of the axle to adjust this dimension.
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