Had a few questions on the 24v alternator drive setup that Florin used to sell. The drive gear had to come off in order to fit a new gasket to the flange behind it. Anyone have a breakdown of how the springs and brass piece and gear go together? I can’t see any part numbers on anything.

       

Hi Nicky,
In your first picture you can see the round marking on the side of the gear lobe? I would think the brass drive would make some marking indication how it would go, that mark could be from spring end or the brass button? the round button would be against the gear lobe and the point in the spring towards the rear of the next lobe, I would think the brass will be permanently against the lobe with spring on the trailing side to allow lash to to take up when engine starts and compress spring and release gear from fly wheel ?, do the 2 pairs of springs fit inside each other? possible they are doubled together on one side of the brass drive to give plenty of tension, I wouldn't think they are used singular if they fit in each other. if they don't fit inside each other they would be used each quarter and it would be a guess as the position of spring, marking from the ends of the springs on surface will be the only way to check spring positions and this will tell the direction the brass drive goes in the gear as well


not sure if this helps?

I think i got it figured out. I matched some discolorations on the brass to some on the inside of the gear. The thicker springs touch the points and the thinner springs touch the round buttons. I don’t really understand the concept of it all but I suppose it’s whatever Dana must have pieced together from some other application to make this work as an alternator drive.

so it has a cushion drive thats interesting.

If both pieces are keyed to the shaft I dough the springs make any difference.
Bob

That is different! All I have seen are either roller chain coupling or Love Joy with a "spider" to cushion the shock. JM

That is a pulsation dampening coupling used on some Cat Generators. Parts book identifies the pieces used but not much help on how it is assembled

There is a LoveJoy coupling linking the rotor shaft in the alternator to the shaft that is driven by that magic gear.

It totally caught us off guard when we pulled the gear off the shaft and it came out in more pieces than we were expecting with springs going airborne in different directions. At least there were several sets of eyes present when it came apart and we recovered all the springs.

I think I was in high school when the pony engine was on its last legs and my father sent the machine to the Belletto’s in Modesto for an electric start conversion where this unit was originally installed. In taking this off the engine for the rebuild, I saw they used a healthy coating of permatex when they mounted the unit to the backside of the front cover instead of an actual gasket. Now I know why! 😂

Interesting stuff indeed! Thanks for identifying what that’s purpose was, OM.

We found two pushrods in the set that weren’t completely straight so now we’re waiting on a couple used replacements to arrive so we can finish adjusting the valves….

Oops. I see it now; my bad! Thanks, JM

I'd be looking for a one piece gear (also an option) rather than messing with that pulse coupling.
Also be sure to allow some back lash clearance between the two gears. The reason the upper mounting holes are slotted.