Timken B-148 Inner Cam Bearing
#1
Timken B-148 Inner Cam Bearing
I am replacing the shoe tensioners on an 01 RK. I've read both ways that people suggest replacing the inner cam bearings with the Timken/Torrington B-148. Its not a money issue, $15 for a set is very reasonable, its I dont have the tools to pull and press the bearings in. My bike is stock, minus an upgraded exhaust. What are your thoughts on replacement? Do the outer bearings need to be replaced to?
I only plan on replacing the shoes... I may upgrade to the hydro tensioners if money allows, but no cam changes for HP or TQ.
Thanks!
I only plan on replacing the shoes... I may upgrade to the hydro tensioners if money allows, but no cam changes for HP or TQ.
Thanks!
#2
#3
Your going to be in there so go ahead and replace all of them. Not hard really. Harbor Freight will sell you a slide hammer internal puller for a bout $19. It does a great job and will not drop any needles into your case. Freeze the new bearings a few hours before install, lube them real good and push them in on the end of the cam, ( then put your cams back in plate after you have changed tensioners ) maybe a little tap with a rubber mallet. Now throw the $19 puller in the trash if you want.
#4
#5
I didn't need special tools. I borrowed a blind bearing puller from Autozone (free loaners) to pull the inner cam bearings. I used an old cam to set the new B-148s in place.
The outer cam bearings I pressed in/out with a small arbor press. I got one from Harbor Freight for $49.
You can see more of how I went about it here: https://www.hdforums.com/forum/membe...04-flhrci.html
JR
The outer cam bearings I pressed in/out with a small arbor press. I got one from Harbor Freight for $49.
You can see more of how I went about it here: https://www.hdforums.com/forum/membe...04-flhrci.html
JR
Last edited by JR-Boston; 06-10-2010 at 03:31 PM.
#6
I ve never seem an inner bearing fail as long as it was installed properly. Your gonna be there so there is no reason not to. Make sure the number side faces YOU when installing and MAKE SURE the needles turn AFTER install.
You HAVE to replace the outer bearing to change the inner cam chain shoe!
You HAVE to replace the outer bearing to change the inner cam chain shoe!
#7
I don't think you need to. those needle bearings are only going to fail in high HP motors where you have flex in the crank. But if you do it, you can heat the outer cam plate in a oven and the old bearings will fall right out. Freeze the new bearings and once the old ones fall out drop in the new ones. No presses needed. They are different metals. I would also agree that you can get a blind puller from a auto parts store for no charge. Freeze the new bearings and they should push right in, might need a tap from a mallet. I think that I saw a thread on this within HD Forums. Try a search.
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#8
those needle bearings are only going to fail in high HP motors where you have flex in the crank.
How would that even be a factor? Are you thinking of the crankshaft bearing maybe?
I like to replace any bearing if I'm replacing the shaft that rides in it. Things wear together, and I prefer a fresh start to allow for this. FWIW, YMMV.
How would that even be a factor? Are you thinking of the crankshaft bearing maybe?
I like to replace any bearing if I'm replacing the shaft that rides in it. Things wear together, and I prefer a fresh start to allow for this. FWIW, YMMV.
#9
Yeah, I should replace them all while I am in there.. But like jamesw said, I like to install new bearings onto new cams, and I plan on replacing all this mess with gears this winter. Replacing the shoes is just a cheaper alternative to keep me riding this summer.
Since I am not installing new cams, and I dont even have a stage 1 kit I am just going to reuse the bearings and save the money until I upgrade later this year. I just wanted to hear a couple guys agree with me to help my guilty (frugal) feelings.
Since I am not installing new cams, and I dont even have a stage 1 kit I am just going to reuse the bearings and save the money until I upgrade later this year. I just wanted to hear a couple guys agree with me to help my guilty (frugal) feelings.
#10