Join Date: Jul 2008
Location: Railton, Tasmania, Australia
Re: Clymers manual for K12
Dick,.... yep, sorry 'bout that but without getting too technical I can attempt to explain the physics associated with uni joints. As the angle across each joint increases it causes the shaft to actually accelerate and decelerate twice per rev. The greater the angle the greater this effect. That's why constant velocity (CV) joints were invented as they generally have at least 5 internal pivot points so this phenomenon is almost diminished, but CV joints can only be produced down to a (relatively) large size, not compact, as is required in the K12 application. Now, back to the case, if the 2 uni joints are not aligned so they are both doing the same thing at the same time, then the 2 X effect is multiplied (doubled in this case) because there are 2 joints. The further out of alignment (phase) one assembles the joints, the worse the effect, until they are 90 degrees opposed, which will be the worst, then is starts to reduce as they become closer to being aligned. get the picture ? The only saving grace with the K12 assembly is that the angle through the uni joints is relatively small, so the effect may not be so noticeable, nevertheless the damage will still be done if left uncorrected for long enough. Best regards, Dennis.