SuzukiSavage.com - Driven Pulley Bearing

mark_k

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Driven Pulley Bearing
09/26/10 at 11:23:09

To all you Savage Lifers - I have a 2002 Savage with 12K miles on it. Noticed the other day that I have some wobble play in the driven pulley on the rear wheel, no play in the rear wheel. I am wondering about the bearing in the driven pulley hub and the rubber shock absorbers in the rear wheel (hub). I know the rubber gets stiff over time and then wears. Should there be any play in the driven pulley? In my mind I would think it should be pretty tight to lateral play when everything is in specs.
Huh

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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28890 L.A. California Gender:	Re: Driven Pulley Bearing Reply #1 - 09/26/10 at 12:18:30 I don't think there should be much side to side play. Does it squeak? Was it hard to adjust the belt to center in both directions? If you like to thump along at low rpm's then there'll be a lot of back and forth motion to wear your rubber dampers out. I put a little grease on them.
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Routy

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Re: Driven Pulley Bearing
Reply #2 - 09/26/10 at 12:43:30

Why do you think there is a pulley bearing ? Wouldn't the only bearings be the wheel bearings ?
And if the pulley is not bolted directly to the wheel, but instead has rubber dampers between, and the pulley is able to move around, wouldn't the rubber dampers be worn out and need replacing ?

But then, I don't have the foggiest idea,......I'm just using a little bit of
logical thinkin,....I think.

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Rich
'07 S40 Blvd stocker, except drilled OEM exhaust and white spacer mod...1/2 (.055)

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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28890 L.A. California Gender:	Re: Driven Pulley Bearing Reply #3 - 09/26/10 at 13:30:43 Hmmmm... logic pulley not bolted to wheel... floats on rubber dampers... gets a hell of pulling on by the belt... so why wouldn't it have it's own bearing? or you could look it up
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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Driven Pulley Bearing Reply #4 - 09/26/10 at 14:57:41 The spacer on the axle seats into a seal. I wunner if theres a bearing inboard of thaT seal? Ohh, Im bettin Yayuhh...
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ralfyguy Serious Thumper Offline Posts: 932	Re: Driven Pulley Bearing Reply #5 - 09/26/10 at 15:26:02 If the rear pulley is not supposed to move around, why is the rubber dampers???
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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28890 L.A. California Gender:	Re: Driven Pulley Bearing Reply #6 - 09/26/10 at 15:31:13 verslagen1 wrote on 09/26/10 at 12:18:30: If you like to thump along at low rpm's then there'll be a lot of back and forth motion to wear your rubber dampers out. I put a little grease on them. yes I tend to repeat myself.
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Routy

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Re: Driven Pulley Bearing
Reply #7 - 09/26/10 at 16:17:23

Ok, so, w/o "looking it up" (I don't have a book) I would have to guess the pulley may have its own bearing to take on the pull of the belt,.... and keeps the pulley from moving side to side. The rubber dampers probably take up the rotational shock,.......makes sense anyway.

Just a guess, of course. And I sure wouldn't want anyone w/ a book telling us how its really works ! Roll Eyes

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Rich
'07 S40 Blvd stocker, except drilled OEM exhaust and white spacer mod...1/2 (.055)

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Lupo Senior Member Offline Posts: 356	Re: Driven Pulley Bearing Reply #8 - 09/26/10 at 16:32:37 #16 http://personal.inet.fi/cool/alppu/bike/wt_311.jpg
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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28890 L.A. California Gender:	Re: Driven Pulley Bearing Reply #9 - 09/26/10 at 16:41:42 Give a man a fiche and he has a meal. teach him to fiche and he's fed for life. ya got a computer don't ya? any online shop gives you direct access to fiche. here's a good fiching hole... http://www.boulevardsuzuki.com/fiche_select.asp (such a hard name to remember though)
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mark_k

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Re: Driven Pulley Bearing
Reply #10 - 09/26/10 at 20:33:18

Haven't pulled the driven pulley yet, but I am thinking the rubber shims have gotten hard and worn, which puts additional stress on the driven pulley bearing causing it to wear prematurely. Will report back next week when the parts are in and I get the wheel pulled. Planning to put a little silicone grease on the contact points with the rubber pieces.
The belt seems to stay centered currently and it was not making any noises. Found it when I was adjusting the shock preload for 2 up.

PS - FYI: They sell the rubber shock absorbers as single pieces, not sets of 6.

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Charon

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Re: Driven Pulley Bearing
Reply #11 - 09/26/10 at 20:37:52

I don't think I would want to use any grease on those rubber dampers, because grease might collect dirt and turn abrasive. I'd use a silicone spray, graphite, talc, mica, or something else dry. They aren't supposed to move, anyway. They compress or relax to smooth engine power pulses.

By the way, chain drive bikes use them, too, and for the same reason.

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Eschew obfuscation.

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Lupo

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Re: Driven Pulley Bearing
Reply #12 - 09/26/10 at 20:51:27

Charon wrote on 09/26/10 at 20:37:52:

I don't think I would want to use any grease on those rubber dampers, because grease might collect dirt and turn abrasive. I'd use a silicone spray, graphite, talc, mica, or something else dry. They aren't supposed to move, anyway. They compress or relax to smooth engine power pulses.

By the way, chain drive bikes use them, too, and for the same reason.

You are absolutely right about not greasing them. Clean the inside of the hub, wash the rubber dampers with soap and water and put it back together. You should do it every time you change your tire. It's called a cush drive and most bikes have them now. Even my shaft drive Guzzi's.

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verslagen1

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Re: Driven Pulley Bearing
Reply #13 - 09/26/10 at 21:07:49

Charon wrote on 09/26/10 at 20:37:52:

I don't think I would want to use any grease on those rubber dampers, because grease might collect dirt and turn abrasive. I'd use a silicone spray, graphite, talc, mica, or something else dry. They aren't supposed to move, anyway. They compress or relax to smooth engine power pulses.

By the way, chain drive bikes use them, too, and for the same reason.

Thanks for the info, will let you know how much dirt collects next time I change it out.

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mark_k

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Re: Driven Pulley Bearing
Reply #14 - 09/27/10 at 08:12:30

Charon wrote on 09/26/10 at 20:37:52:

I don't think I would want to use any grease on those rubber dampers, because grease might collect dirt and turn abrasive. I'd use a silicone spray, graphite, talc, mica, or something else dry. They aren't supposed to move, anyway. They compress or relax to smooth engine power pulses.

What was I thinking? The grease sure can make assembly easier, but silicone spray can work just as well. Will try to keep that in mind. (After fifty, the mind works more like a steel trap that's been left out in the rain.) Grin

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