Cat 215 sprocket removal

Well I have managed to dig out the adaptor group No that fits in the sprocket, its 8T5243 this is for the fancy hooks that you poke in the big holes, then you just hook up to the service cylinder and suck em off, and no they dont stay put or jamb up as they come off without to much tonnage(30-40) any gap between the 2 items is full of crap and rust they come to bits fairly easy, the early 215's had very long bolts holding the front iders onto the wishbone, I used I think D6 long transmission bolts to sort them when they break, the 219 was a lot better swinger with the 225 undercart and the 215 top.

Here's a photo of the sprocket hub. Apparently it came off easily once the sprocklet was moved inwards slightly using the 4 forcing bolts to break the taper. Tony, you can see why I didn't think it would come simply by pulling it, because of the 4 slots in the hub what I think would have happened is that the the hub would have tightened on the splines and applying enough force to get it off would probably have resulted in spline damage.

Nige I cannot get the brain cells to understand those slotted bits?? the tooling I had to use to suck off the rims I was faced with was that 8T5243 stuff, this was on I am sure a CAT 215 it makes no odds but I think I still have a parts book some place for it, I know the excavator was a used import from Germany, as the Company bought 4 excavators from the same location and a mixed bag at that 215-219-225, anyhow good to see its in bits.

Tony, Check out the diagram on my post on Page 1. The tapered hub with the 4 slots in it is the one that fits on the splines of the shaft then you pull the sprocket hard on to the taper from the inside using the 8 x 3/4" bolts. That locks the hub on to the splines and fixes everything in position (allegedly). Busted-arse way of doing it if you ask me.

Ahhhh...same idea as a Browning Split Taper Bushing with a Sprocket or Sheave. Good that 1 came apart so easily, i have had to cut out the inner split taper bushing cause they were so tight.

Update: The 2nd one was easier and faster than the first.Thanks to advice on this forum. Found this duo cone info from Cat http://www.cat.com/cda/components/securedFile/displaySecuredFileServletJSP?fileId=91334&languageId=7

Good info on the Duo-Cones there for any shade tree mechanic Gregg, also for the pros as well .............

Thanks greggn! I have always wondered how something could seal in such hostile enviroments.