tolsen

Front Wheel Bearing Modification - One Good Out Of Two Bad!

36 posts in this topic

Fair bit of salt but not so much grit.

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As Strawboss mentioned, I find it really funny that Tolsen - of all people - would come on here and damage coins publicly!

This is the guy that I have heard condemn others about virtually anything legal or ethical, whether it be driving the speed limit or fiddle with emissions systems.

It has never been a capital crime to alter emissions systems, but it HAS been a capital crime to mess with currency, in your area anyway.

As far using a "thick" oil in your bearings instead of grease, I know from my experience with spindle bearings which have very fancy soaps and thickeners in them, the oil will likely be fine in this application until it gets enough stuff in it to become a destructive grinding fluid. Grease when packed in the proper amount (which the OEM bearing company does) doesn't heat up too much from churning, while still has enough to keep oil where it needs to be. The grease that is away from the rolling elements can catch trace amount of foreign objects before it reaches the bearing if they somehow managed to get past the seals.

Years ago I read an interesting paper on the failure rate of ball bearing units that had the ability to be greased vs non greased. If the proper break-in of the grease is not observed and the resultant churning heat is allowed to get high enough, the grease breaks down and there is a loss of lubrication early after the bearing is regreased. More is not better... With my NSK high precision matched CNC spindle bearings I had to use a little syringe to meter in the exact amount between balls for it's bearings.

The main problem I see with the oil system is the effect on the environment when the seals start to leak and drip all over the road, causing untold motorcyclist crashes and causing your own bearings to fail soon after, possibly resulting in a locked wheel and horrible crash, also perhaps causing a fire and causing untold smoke damage to surrounding neighborhood homes curtains, which will all wind up in the landfill, next to all that extra wasted material from people that decided to use spin on oil filters on their Smarties against the stern advice of Tolsen.

Dave

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Defacing any of the Queen's coins is still not legal but i do not face being hung, stretched or quartered. Section 10 of the Coinage Act of 1971 is very clear. It is indeed illegal to melt down, break up or drill a hole in any metal coin. I may face a fine not exceeding £400 or imprisonment for a term not exceeding two years, or both.

The reason I used two pence coins was purely for convenience. I had to beef up the thickness of each dust cap so I could tap threads sufficiently strong to hold a screw.

It is now seven years since I did that bearing mod. The bearings are still in good condition with no noise or play. Same applies to the rear bearings which were modified without committing any crime.

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Best way to make your wheel bearings last nearly forever is inject grease periodically.  Beware a grease gun in the wrong hands can also quickly ruin the bearings by pushing the seals out of their sockets.

 

New wheel bearings for the 450 are very cheap now starting just below £30 so no point attempting complex rebuilds requiring both special tools and skills.

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DSC02168.jpg

 

My gear oil turned out too thin for the oil seals and leaked out wetting inboard side of brake rotors resulting in eternal life inboard pads.  Had to inject lithium grease and keep cleaning inboard side of rotors for a couple of months.  Surprisingly, braking efficiency did not feel much reduced in spite of oil all over pads and rotors.

 

I am still running on same front and rear bearings.  Also on original rear brake shoes and drums.  Renewed front pads not long ago.  They were all rather thin about a mm left of friction material and annoying accoustic alarm whenever I touched brake pedal.

 

 

 

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All you can do is either renew or attempt a rebuild as described in this thread.

 

Rebuild using outboard inner stationary race rings from two bad bearings. Also rebuild using both outboard bearing balls and cauges. 

Use best oil seal out of the two bearings and finally use best outer race rings out of the two. 

Edited by tolsen

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Weird.  In 360,000 km of 450 motoring I have had one front wheel bearing get slightly noisy - changed under warranty.

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Chewing that many bearings up leads me to suspect bent stub axles.

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With bent stub axle it will be impossible to get old bearing off so I doubt that is the case.

Lack of proper procedures when changing bearing could be the cause for frequent bearing failures.  Stub axle must be properly cleaned and suitably greased to allow bearing to slide on without use of hammers.  Oil seal on front bearing is rather poor, similar in design to rubber oil seals on deep groove ball bearings.  Seal area must be protected from the elements.  Negligence to replace disintegrated splash guards means very short bearing life indeed.

 

For that reason, on mine, I have fitted splash guards made out of plastic dishwasher safe soup plates.

 

DSC03960.jpg

 

DSC03933.jpg

 

DSC03964.jpg

 

Splash guard in good condition ensures bearing seal area and ABS ring are shielded from the elements.

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Have now corrected all broken Photobucket image links in this thread.

 

I made this bearing mod about 8 years ago and I am still running on these modified bearings. The oil turned out a wee bit on the thin side for the worn inboard seal so I ended up greasing both bearings using an Oregon chain saw grease gun.

 

Fitting grease nipples on the rear wheel bearings were done about same time.  These bearings are also in a perfect condition in spite of having suffered through at least ten winters with salt treated roads.

 

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