Well, Sketchup is neat, but it's not really appropriate for this task.
After a lot of effort making just TWO of the components, I quit and headed for Photoshop.
2 images above: Sketchup of the pump shaft and a representation of the transmission bell housing with depth clearances and the input shaft.
1 image above: quick ' n' dirty Photoshop cross-section representation of all the components to scale.
(Some parts, fyi: Red: frame; Yellow = motor; light grey = adapter plate; blue = bell housing; green = splined clutch hub; dark grey = pump shaft bearing plate; misc others...)