JD A Rock shaft reassembly advice needed...

My A is serial #654083, believe a 1950 model. I took the power trol unit off to replace cylinder seal and gasket. This removal went great. But the video I have to show R/R of a power trol doesn't address the right hand rockshaft reassembly. When replacing the rockshaft will the rockshaft spring be under tension? Also when installed properly does the crank arm move in towards the cylinder past being vertical with the rockshaft? Also I assume the rockshaft spring's purpose is to return the rockshaft to the lower positions. It appears that I need to reassemble the rockshaft with the spring under tension. Is this correct? Thanks for any help in advance. Jack

If saw the arrow on the end of the rockshaft. I love it when it all starts to make sense. Thanks again. Jack

Morgan I hope to return a favor to you someday.
Your help is greatly appreciated! Also what you have said makes the most sense from what I have discovered so far. I'm not a mechanic nor would I say a weekend mechanic, just a programmer/analyst with a hobby collecting stuff. Like I said I watched these guys on a video, show a tear down and reassemble of the power trol. I also talked to a retired JD mechanic who worked on these two-lungers for years. He told me there is no tension on the rockshaft from the spring. So I said to him why did JD put the spring on the rockshaft if it served no purpose? He said he'd have to check his service manuals and get back to me on that. I don't have a manual on the power trol yet, but one's on its way. I was hoping to get an answer that made sense to me like yours. Gee I'm so excited I can't wait to check the end of the rockshaft for that "arrow". I don't mean to discredit any individual or group offering help on these old girls. But being a programmer you get used to searching for a logical solution to a problem.