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Message started by Jsud04 on 09/29/14 at 05:53:39

Title: drive pulley
Post by Jsud04 on 09/29/14 at 05:53:39

After reading allllll the posts on drive pulley I could find and fighting with this thing loosening up even after 100 ftlbs if torque I have resorted to the following.... Now my 86 does have some shaft wear. And the original pulley was worn way out.

Harbor freight electric impact driver, rtv, red loctite, new pulley.

RTV on splines
Red loctite on threads
Washer up against the pulley and the nut just threaded onto the shaft

I spun that puppy on with the driver and then just let it run for several seconds...

Its tight now. However if I push on the sides of the pulley I can feel it move ever so slightly. But it isn't rocking forward or backward.... The harbor freight driver claims 230 ftlbs of torque...I don't believe it...but I gave the nut what ever the driver could.

Title: Re: drive pulley
Post by engineer on 09/29/14 at 06:55:16

If you have to do this again use a "bearing mount" product on the splines to help fill the gaps and prevent the movement that causes the loosening. Use a good solvent to clean the shaft before applying bearing mount. Here is a link to a Loctite pdf product guide.

http://www.loctite.ph/php/content_data/LT4680.pdf

Scan down the document and you will find information on keyed shafts and others. Bearing mount is often used to fill in the gaps between worn shafts and hubs or bearings. The goal is to stop the hammering movement that leads to more trouble. Unfortunately it doesn't work on large gaps, Loctite says it is only good for a .010" gap but I've seen it used successfully on larger gaps. Also, other people make this stuff and may have better bearing mount than loctite. Off hand I can't think of the names of the different manufacturers.

Title: Re: drive pulley
Post by Dave on 09/29/14 at 07:14:52

Yeah...I agree with engineer. RTV is a gooey, spongey, stuff with little compressive strength. The bearing/shaft product would be a much better product for filling gaps in the splines.

The Red thread locker is great....and you might try a new lock washer and bend up 2 sides on the side of the nut...instead of just one. (When the nut comes loose....is it bending the lock tab or shearing off the small splines on the lock washer?)

http://www.amazon.com/Loctite-Strength-Retaining-Compound-Bottle/dp/B000O05BXW

Title: Re: drive pulley
Post by Jsud04 on 09/29/14 at 07:45:50

What do you think about my method of tightening it down? Too much?

Title: Re: drive pulley
Post by Serowbot on 09/29/14 at 07:56:38

0B3234252433327175410 wrote:

What do you think about my method of tightening it down? Too much?

Maybe,... but that's how I tightened mine down, too... ;D...

Title: Re: drive pulley
Post by Dave on 09/29/14 at 07:58:07

556C6A7B7A6D6C2F2B1F0 wrote:

What do you think about my method of tightening it down? Too much?

Well....there is no way to know what kind of torque is on it with that method. I suppose if you didn't break off the stud or strip the threads, it might be OK? I torque it down to the high end of the allowable range with a torque wrench....but then I am not dealing with a worn shaft yet.

You know what is a bit weird about this??????? Lots of motorcycles have the sprockets loose on the shaft....with only a snap ring or similar keeper to hold the sprocket on the shaft....and they don't wear out. The Kawasaki KZ750 limited has a very similar pulley to the Savage, and the pulley is held on by a keeper that has splines and fits into a groove, and is then bolted to the outside of the pulley....it acts like a snap ring that can't rotate. Those shafts must be made of something harder than the Savage is.

Have any folks that converted to chains had problems - the sprocket has much less surface area on the splined shaft?????.

Title: Re: drive pulley
Post by verslagen1 on 09/29/14 at 08:08:20

It's cause we have a kick ass single.
the multi's don't have the problem.

As far as torque goes... who knows.
Try it with a torque wrench at the max, if it don't move the torque is higher.
I wouldn't back it off, damage (if done) is already done and won't hurt it any more to leave it.

Title: Re: drive pulley
Post by Jsud04 on 09/29/14 at 08:09:11

I just ordered some small tubes of Permatex 20297 Bearing Mount for Worn Parts 300 degrees up to .02 gap. I will see how it works when it gets in. I am hoping its safe to ride until it comes it?

Title: Re: drive pulley
Post by justin_o_guy2 on 09/29/14 at 09:36:12

I did not know such a critter existed,, THATS a Nugget,, Thanks.. and, it Say,, Sears sells it.. next time Im Thataway Ima have a look,,