rear axel bearings

[givergas]

evening, well i have the rear tire off and im down to the hub and read in the manual that in order to take out the bearings you need to put some heat on the outer bearing boss. as i look thru the hub it looks like theres no place to put a punch. the question is can i tap on the bearing till the opposite bearing comes out then remove the distant coller and punch out that bearing. 1971 100-b+.... albert

[Dale]

To answer your question, no you can not drive the bearings through. Under each bearing is a spacer/washer that sits on a solid ledge.

Some use a long drift punch with a ground slope to the end. I use an inside bearing slide puller and after heating the bosses the bearings will pop right out.

To install just heat the bosses and freeze the greased bearings and they will drive right in with a bearing driver or a large socket.

[thrownchain]

You'll have to go diagonal across the hub, you won't get much to pound on, but with some care you can move the first one out, after that you can remove the bearing spacer and drive out the opposite side. I walk the punch around the inner race as I'm driving and it'll come right out.

[matt glascock]

Both good techniques for removing bearings. They are going to be replaced anyway. Make certain when installing the new bearings that you apply absolutely NO driving force on the inner race or you will ruin the bearing.

[Bullfrog]

. . . and there is a semi-detailed article on removing wheel bearings in the Resonator Revisited (the Hodaka Club Newsletter).

Ed

[Bill2001]

Heat the hub, tap bearings out. The important thing is to heat the hub. Heat the hub to 200 deg-ish. This is "spit-sizzle" hot.

[givergas]

thanks thats what i need to know, its hard to tell how much heat when the manual says to heat it up , and drift punch it is.. albert

[Bill2001]

"Spit-sizzle" : lick your fingertip or dip it in water and touch the hot metal briefly. You'll hear a "pssst" as the water boils off and you won't get burned. You're looking for "a couple hundred degrees". Aluminum soaks up heat very well, so use a butane torch.

[givergas]

worked very well, almost like i knew what i was doing. thanks for the info.. albert

[Bert44]

Another trick I picked up from doing the wheel bearings on my MZ is to file or grind two slots opposite each other on one end of the spacer. Next time you do the bearings there is a spot to locate the drift. Put the slotted end on the bearing side with less distance to press it out. After it is drifted out you the can use a press to remove the other side bearing which has further distance to be pressed. Heat is good. I used to spit on the hub as an indicator but recently bought an remote temperature gun (infra red I think), they are quite cheap. My wife uses it to check the temp. of oil when she’s deep frying food.