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Syncronizing the PTO driveline
Well, there was a chance I got my info wrong since it's been a few years since I've done hands-on. But along with wracking the noggin' and some cursory investigation on the Web, the results were, well... mixed. Some sites didn't address rotating the yokes 90 degrees; some did. I looked at my Dodge Ram driveshaft and the yokes were aligned--but that doesn't really mean much since having the driveshaft in near perfect alignment the driveline path is aligned straight through from the transfercase through to the axle. Having lifted four offroad Jeeps over the years 10-12" I stand by my earlier comments as having to out-of-phase or rotating the yokes 90 degrees to cancel vibration.
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Syncronizing the PTO driveline
Got it all sorted out, seems like the triangular shaped shaft I bought (so-called metric shaft) can only be attached in one orientation anyway (the sides are slightly different) so the driveline lines up perfectly as below:
]==============[ or if you are looking at it differently O===========O
I suppose it wouldn't make much difference on an ATV or truck if the orientation was ]===========O AND the shaft was perfectly balanced but in a generator application there would be slight speed ups and slow downs and that would affect your generated power quality. On an ATV you would be totally unlikely to notice it - or would you?
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Syncronizing the PTO driveline
Murf and company, can you go over this again? I am all flumuxed and confused as well. ;O)
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Syncronizing the PTO driveline
Try the Wikipedia web site... it has a fairly good description of the situation.
In essence, as the angle between the drive and driven shafts increases from 0 degrees (straight line, no bend), the relative speeds of the two shafts vary from one another, first speeding up, then slowing down. The greater the angle between the shafts, the greater the maximum difference in rotational speed. By keeping the two universal joints lined up as Murf described, the effects nearly cancel themselves out, but not quite. The effect isn't symmetrical, so the slowdown at one end can't quite make up for the speed up at the other end.
David
Link:
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Syncronizing the PTO driveline
Really the only time you would have to worry about the phase of your drive line is if you were building or repairing it your self. When coming from the manufacturer they will be phased correctly. All new and modern pto shafts regardless of shape will go together just one way. I have run across some older square shafts that are worn that will go in any direction. Basically you want your shaft yokes to be in line with each other.
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Syncronizing the PTO driveline
Chief, did you (and everyone else) get this straight after looking at the Wikipedia info.?
Best of luck.
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Syncronizing the PTO driveline
Yep Murf...........clear as mud now! ;O) Basically what I was thinking but the terminology being used threw me off. Great link by the way s chrand! Thanks!
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