Author Topic: front wheel bearing removal (Read 5663 times)

MIKE550/4 · « **on:** August 02, 2009, 01:14:31 AM »

hi all

need some help, having battled hard to get this retainer off thought it would be easy to get these 2 bearings actually out, tried drifts, rawplug idea was mentioned, had a go but will not budge

at a standstill on bike now till i get theses bearings out, any tips guys cheers mike

78 550 k3 ( uk bike )

front wheel

mystic_1 · « **Reply #1 on:** August 02, 2009, 05:27:21 AM »

Take a BFS (Big F#$^ing Screwdriver) like a large #3 phillips. stick it into the about two inches and then pull sharply to one side. The center collar between the bearings should shift to one side ever so slightly. Now you should be able to get a drift to engage on the inner race of the bearing and drive it out. Remove spacer, flip wheel over, and drive the other one out.

mystic_1

Bill/BentON Racing · « **Reply #2 on:** August 02, 2009, 06:40:31 AM »

Ditto that advice,it will work!Bill

Johnie · « **Reply #3 on:** August 02, 2009, 06:45:10 AM »

Here is a pic of the spacer you are trying to move out of the way. You need to wedge it over a bit so your drift can get a good bit on the edge of the bearing.

Flying J · « **Reply #4 on:** August 02, 2009, 07:51:30 AM »

here is what i use. $40 @ harbor freight. Works like a champ.

BobbyR · « **Reply #5 on:** August 02, 2009, 08:41:34 AM »

Ditto on everything and one more tip. Heat the hub with a heatgun or torch. Don;t melt it just hot to the touch, this expands the Aluminum and when you give them a good shot they will come out.

Johnie · « **Reply #6 on:** August 02, 2009, 09:42:34 AM »

Quote from: BobbyR on August 02, 2009, 08:41:34 AM

Ditto on everything and one more tip. Heat the hub with a heatgun or torch. Don;t melt it just hot to the touch, this expands the Aluminum and when you give them a good shot they will come out.

Hey Bobby....this is a familiar thread...

MIKE550/4 · « **Reply #7 on:** August 09, 2009, 10:58:53 AM »

cheers guys, heat round the hub did the trick

in my excitement though when inner part came out did not notice what end of spacer goes where, does the smaller flanged end of spacer go to retainer side ?

thanks again

pic to show small flange left hand side

MCRider · « **Reply #8 on:** August 09, 2009, 11:46:20 AM »

you may want to wait for confirm but IMO the flanges simply keep the spacer somewhat centered so the axle can pick it up on its way thru. Once the axle is in the flanges do nothing. So it wouldn't matter which way it goes.

mystic_1 · « **Reply #9 on:** August 09, 2009, 12:39:59 PM »

Agreed, I don't think the flanges touch anything at all once it's all buttoned up. And I think the inside of that bore is straight, so it shouldn't matter at all.

mystic_1

BobbyR · « **Reply #10 on:** August 09, 2009, 12:46:48 PM »

Quote from: MIKE550/4 on August 09, 2009, 10:58:53 AM

cheers guys, heat round the hub did the trick

in my excitement though when inner part came out did not notice what end of spacer goes where, does the smaller flanged end of spacer go to retainer side ?

thanks again

pic to show small flange left hand side

I am glad the heat worked. I tried it both ways and heat really helps. Yes Johnie been there done that.

DaytonGuy · « **Reply #11 on:** August 09, 2009, 01:44:45 PM »

Isn't the front hub on the 550 (maybe 750's too) the one where you can simply pound on the bearing opposite the retainer as if you were pounding it into the hub and it will actually push the other side out?? You need to be very carefull that you don't actually tap the bearing into the center of the hub or you are SCREWED. Once the bearing side retainer is out, flip the thing over and pound the other bearing back out.

I remember doing this, but I can't remember if it was front or rear; but I think it was front. Takes the spacer in the middle out of the equation completely.

Johnie · « **Reply #12 on:** August 09, 2009, 05:12:57 PM »

You may have bent the little tabs on the spacer a bit when you pushed it to the side. I usually straighten them out so the spacer is centered again before I put the last bearing in. That way it should be pretty well lined up to accept that axle.

MIKE550/4 · « **Reply #13 on:** August 10, 2009, 07:02:55 AM »

Daytonguy

all i did was the heat the hub up gently for a few minutes , popped a screwdriver through against the lip couple of hits and it came out,

i suppose refit i wil put bearing in retainer side first, then spacer then bearing in the back, then retainer and axle last, when fitting the new bearings might try the heat the hub first and bearing in freezer trick , bearings seem to fit in fairly flush so will make sure i dont knock it in all the way, that would be a disaster

JS550 · « **Reply #14 on:** August 10, 2009, 07:08:17 AM »

I used a B.F. Socket! One that fit around the outer race & smacked it with a hammer. That worked really well.

mystic_1 · « **Reply #15 on:** August 10, 2009, 08:06:26 AM »

The bearing on the retainer side is held firmly in place in it's bore. The other bearing is free to float in the hub, it's position is determined by the other bearing and the center spacer.

So, install the retainer side bearing first, then the retainer, then the center spacer, then the other bearing, then rest.

mystic_1

Bodi · « **Reply #16 on:** August 10, 2009, 10:30:22 AM »

The retained bearing sits on a step in the bore, the opposite bearing sits in a bore with no step - just over the OD of the bearing until it hits the (much larger) inside of the hub.
SO the retained side has a smaller bore (where the spacer sits, anyway) and gets the smaller end of the spacer.

MCRider · « **Reply #17 on:** August 10, 2009, 10:38:50 AM »

Quote from: Bodi on August 10, 2009, 10:30:22 AM

The retained bearing sits on a step in the bore, the opposite bearing sits in a bore with no step - just over the OD of the bearing until it hits the (much larger) inside of the hub.
SO the retained side has a smaller bore (where the spacer sits, anyway) and gets the smaller end of the spacer.

I'm not a 500/550 guy so thanks for that. Is it the flanged part that's smaller on one end, or the spacer part? Just curious.

I never noticed if its the same on CB750s.

MIKE550/4 · « **Reply #18 on:** August 10, 2009, 11:59:38 AM »

good info guys

diameter of bore of spacer is exactly the same, what is actually different is height the 3 prongs come out from the spacer, approx double the length

MCRider · « **Reply #19 on:** August 10, 2009, 12:03:59 PM »

Quote from: MIKE550/4 on August 10, 2009, 11:59:38 AM

good info guys

diameter of bore of spacer is exactly the same, what is actually different is height the 3 prongs come out from the spacer, approx double the length

Curious.

Sounds like Bodi's got your answer.

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Author Topic: front wheel bearing removal (Read 5663 times)