Front Discs

[Alex Crow]

well good for them, if they need to do it that way then no harm done.

i myself always use a torque wrench to tighten wheel bolts, having ensured the threads and bolts are clean and free. many garages trust the airgun to overtighten them :roll:

 

[Cole@MBS]

well good for them, if they need to do it that way then no harm done.

i myself always use a torque wrench to tighten wheel bolts, having ensured the threads and bolts are clean and free. many garages trust the airgun to overtighten them :roll:

Been there A/P, hate the things!!


http://forums.mercedesclub.org.uk/showthread.php?t=49351

 

[Rockhopper1]

Thanks guys for all of your usefull info. I have replaced discs and pads on many different cars and never have i come across discs so seized to the hub as these were. Anyway the discs and pads are changed now and i have cleaned out the wheel bearings and replaced the high temp grease.

Can i ask on torque setting for the end float and any other info/pics on the correct setup to ensure everything is as should be. At the moment i have hand tightened the end float and spun disc and re-checked float and seems to be ok. I have tightened up the allen key and wheel is now back on and there is no play on wheel and it spins smoothly

Thanks

 

[stivesvelo]

Correct me if I'm wrong, but don't these bearings need a bit of pre-load?

 

[Number_Cruncher]

The bearings should be set with an end float of 0.01 to 0.02mm, and definitely should not be preloaded.

The only way to acheive this minuscule setting is to use a dial gauge - as called up in the MB procedure. Clearances this small are beyond what anyone can feel.

There are various "rule of thumb" bodges which are commonly used to set the bearings, but, none of them will meet the MB specification. Whether doing the job properly or not matters to you is another question.

 

[television]

many of us just do up the nut till it gets stiffer to turn and back it off say 1/4 of a turn,,,it will not be perfect but the same as a bearing that has not been touched say in 30k miles

 

[Dosco]

think i have one in the shed somewhere!!!

Sacrilege IN A Shed! now now your man get it out right away - the dial gauge I mean

 

[television]

Sacrilege IN A Shed! now now your man get it out right away - the dial gauge I mean

Well at least he did not say that he has a shed full

 

[Rockhopper1]

instead of a dial guage could i use feeler gauges instead?

 

[television]

instead of a dial guage could i use feeler gauges instead?

No that is impossible,,,you will be fine by just doing up the nut till the wheel gets tight and backing off 1/4 of a turn max

 

[Number_Cruncher]

instead of a dial guage could i use feeler gauges instead?

No - the required clearance is much too small.

MB have specified a clearance, and have written a procedure to set the bearings.

The dial gauge which you need to use the procedure is a cheap tool, and is simple and very quick to use. For some odd reason, people are resistant to the idea of doing the job properly, and have come up with spurious rule of thumb methods - you'll find two different vague "recipes" on this thread alone.

Oddly enough, for the DIYer, I think the MB procedure is by far the easiest way to obtain a consistent result, as it removes all skill and judgement from the setting (it doesn't rely on your personal judgement of what represents "tight") - perhaps at a get together the experts should set up a bearing, and then the end float be measured by a dial gauge to see how good the various home brew methods actually are?

 

[djb]

...... perhaps at a get together the experts should set up a bearing, and then the end float be measured by a dial gauge to see how good the various home brew methods actually are?

now that would be interesting !!!

 

[Jay Gee]

now that would be interesting !!!

Yes,especially if it was an original untouched bearing on a car with a few miles under its belt,and before and after readings taken.

 

[Rockhopper1]

Thanks guys for all of your usefull help.