|Jim's Handy Bearing Capture Device (Low-Tech)|
|Rotated for Access to Rear of Case,|
Here's the "back side" of the center case with Jim's handy-dandy low-tech bearing capture device still holding the rear bearing in place after mating the case halves. With the engine rotated into position for installing the "cam ring," as it's called on a radial engine, the cardboard tube and nut is removed.
|Cam Ring in Place for Checking Play|
|Installing Tappet Bodies|
Now we can install the cam ring and center gear for the purpose of checking for the required amount of space between the cam and it's spacer. The book calls for .008"-.012". This one measures .010"—perfect! With the cam removed again, we began installing the tappet bodies, which are aluminum tubes that are held in position by studs and nuts. Jim had previously layed in the gasket with a thin film of Tite Seal on both sides. He likes this stuff as it never hardens, but provides a nice seal for surfaces like these. The roller tappets will be installed in these tubes, rollers mounted on cam ends, and circlips installed on the outside end
|View of Roller Tappets Installed|
|This is How Roller Tappets Engage the Cam Ring|
Once all the tappets are installed, we can lay in the cam ring and center gear. It was slathered well with STP/engine oil mixture. This is what everyone uses when building up an engine. I've used this same mixture on airplane and auto engines that I rebuilt. Good Stuff!!
There is a BIG nut that holds this gear in place. It has to be torqued to a very high setting and a keeper installed with a safety added to hold the keeper. This nut is important.
With all this in place we can move on to assembling the accessory case and mounting it to the rear of the engine. I don't know what I would do without this fixture...and Jim Friedline!