Uppo, looking at the worm gear, it has two bearings, one on either end. One is the thrust bearing, the other is the idler bearing, (the idler bearing is by the brake sheave end of the machine). Both bearings are pressed into the casting from the outside, into the machine housing. In both cases, if either one of these bearings is removed, then the worm gear could pop out either side of the machine. Because both sides worm bearings are larger than the worm, so once the bearings are out of the way, there is no obstruction to the worm coming out. So it looks like it could go either way. I'm just puzzled why it isn't moving yet. I'm gonna put some light pressure tonnage on the worm, pushing from the thrust bearing end, to try and push it out through the brake end of the machine. I think maybe that bearing on the brake side of the machine is pressed in under some fair amount of pressure, so it will have to be "squeezed" out, with the worm.
"Crown wheel", sure, that makes perfect sense, even though it's the first time I heard that term. If you wanted to take the worm out, without first removing the crown wheel, maybe you could unscrew it as you pull it out? IDK, just wondering.
What are "packers"? Is that what we call "shim" plates? You know, little thin pieces of metal, used to adjust parts of machinery?
This sheave shaft has no shims anywhere, to raise and lower it. On each end of the sheave shaft, there are angled pin-roller bearings, which ride in removeable outter races. These outter races have horizontal bolts, threading into both the machine casting, and the crown wheel cover. The race itself becomes a "fishplate" of sorts, securing the top cover onto the lower machine casting. It is not possible to fit shim stock into this arrangement, to effect any change in ring height. The only possibility would be if the outter races were eccentric, then they could be rotated, and the ring would raise and lower according to the degree of rotation of the outter race(s). But the 6 bolt circular hole pattern means that the adjustment would be in steps, and not infinitely variable. Doesn't seem likely that Otis would do it this way. Of course, the worm has no ability to move vertically either.
Looking at the outter races, there is no apparent eccentricity to them, either.
Weird.
Last edited by Vic; 01/22/12 05:45 PM.
