Jim Becker's Drawings
Full Size Bell Crank Tracing
This is an outline trace of the actual part. The part itself is slightly smaller, because of the width of the pen tip used to do the trace. Likewise, the holes are larger than in the trace. This is a view from the left, as mounted on the tractor. What shows is the side that bolts against the rockshaft. The ruler is included in the scan in case you need to adjust your print to get actual size.
The part is made from 2" wide by 1/2" thick stock. I would suggest starting with a piece longer than needed and cutting off the excess after it has been bent. The inside radius of the bend is about 1 1/2 inches. The line at the upper right of the trace that looks like a stray line is the actual end of the part.
The 2 rectangles around 2 of the holes are spacers that are welded to the main part. The upper right one is 1 1/2 by 2 1/8. The other is 1 1/2 by 2 1/16. They were probably designed as identical parts. They are 5/8 thick. The 1 1/2 dimension is aligned across the main part, so they don't reach to the edge of the main part. They are welded on the 2 sides near the edges of the main part, but not across the ends.
The diameters of the holes, starting from the upper right, are: 13/16, 11/16, 13/16 and 11/16. Holes 1, 2 and 3 need to line up with the holes and pins of the rockshaft arms. The fourth is 3 1/2 inches from the third hole.
Jim Becker 3/30/00