I had an opportunity to press 2 gearbox bearings into my 4-Speed 650 unit construction 650, but I needed to think of a way to stabilize the engine and gearbox perpendicular to the press table.
My solution was to fabricate a thick plywood base to which the engine could be solidly attached using the primary chain case and chain case cover fasteners.
The plywood base provides a stable, convenient way to transport an engine, too. For convenience and transport, I added four large rubber shock mounts beneath the base. Makes the base with engine much easier to pick up, and more resistant to sliding in cargo.
(Click Photos to Enlarge)
To mark holes for drilling I set the primary chaincase down on the playwood and traced it, marking the best I could, lightly, all the drillings.
Next I layed a new primary chaincase gasket over the tracing, and after a lot of adjusting, fixed the gasket in several places with masking tape. I then re-traced the drillings completely using the gasket as a template.
The large nut on the left is the rotor nut threaded onto the end of the crankshaft (DS).
Transmission and gearbox are stripped in preparation for replacement of DS ball bearings.
I wanted to put the base with engine into a vice to hold it vertically, but my ancient wood vice was not up to such a feat.
