Thread: Strange bearing beside the PTO
01-14-2011, 11:38 AM #1
Strange bearing beside the PTO
Yesterday I pulled my driveshaft because I am in processing by making my own shaft seal setup.
I have always noticed the rubber bellow on the PTO but just thought it was there to make sure dirt and things like that didnīt went in there. I found out that there is a bearring inside this bellow. I have even replaced a driveshaft before without notice a bearring in this bellow
Can anyone tell me what this bearring is doing ? Canīt see any reason to put in a bearring there ? I could see that there were two o-rings inside the bearring but I would deffently think that the oil seal in the pto cover is enought to keep the oil inside the pto ?
Looking forward yours answers
and sorry for my english but Iīm from europe
01-14-2011, 11:45 AM #2
01-14-2011, 12:05 PM #3
I'm not 100% sure what that bearing does, but I can tell you when I rebuilt my 05 RXT, I forgot to put a clamp back in place where your thumb is in the #3 pic. This resulted in puking oil in the bilge, and a huge problem. It was probably the hardest troubleshoot I've done. Hope this helps.
01-14-2011, 12:09 PM #4
The bearing is the oil seal for the PTO..
01-14-2011, 12:16 PM #5
But there is no oil inside my bellow ? it seems like my oilseal in the pto cover is enought to keep the oil inside ?
01-14-2011, 12:19 PM #6
01-14-2011, 12:23 PM #7
+1..When i put mine back together i put a thin bead of Right Stuff silicone around the outside bearing surface that slides into the boot..This will help in the future in aiding in holding the bearing into the boot if you ever have to pull the driveshaft out..
01-14-2011, 12:27 PM #8
Okay I will remember that. But I will go with my own custom made shaft seal. With two needle bearings and oil inside. I will press a hardened bushing on the shaft. I will post some pic of the unit as soon it is finish.
01-14-2011, 12:47 PM #9
Dont confuse this PTO seal with the Drive shaft carbon seal..They are completely different..You Need this seal to keep the oil in the engine..The reason there is a bearing in there is because oil O rings cannot hold up to the heat and RPMs that the driveshaft spins..thats why there is a bearing inserted into the boot...Just for the record there isnt very many failures with this system unless you dont put it back together correctly..
01-14-2011, 12:51 PM #10
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
By bigmike in forum 2-Stroke PerformanceReplies: 4Last Post: 05-09-2008, 12:51 PM
By bnovak in forum Yamaha Old School SkisReplies: 12Last Post: 10-22-2007, 06:38 PM
By Keddano in forum Polaris Open DiscussionReplies: 4Last Post: 08-11-2007, 12:52 AM
By Sunfunzoom in forum 4-Tec PerformanceReplies: 24Last Post: 02-13-2006, 06:28 PM
By mxl16 in forum 4-Tec PerformanceReplies: 16Last Post: 06-19-2005, 12:45 PM