Wish I could take credit for spoting it but the very, very first thing
in the pdf document states the wheel bearing end play as 0.01 - 0.02.
Boy I love Mercedes Manuals, so well indexed and easy to reference. It
also doesn't give a unit of measure, but hey, were not building the
Hubble Space Telescope.
On 3/11/2013 9:14 PM, Gerry Archer wrote:
From: "Alan Clarke" <alanc...@pacbell.net>
I know the recommended procedure people are following for setting
front wheel bearing is to use a dial indicator and, with the base on
the rotor measure the end play of the spindle. People are
recommending half a notch if one's dial indicator is measuring
thousands.
My question is that I have a 1977-1988 Mercedes Service Manual for
Chassis and Body Series 123. In section 33.3-300/2 it states :
"6 Place tester on front wheel hub and set dial gauge to approx. 2
mm pre-load."
"7 Check end play of wheel hub by pulling and pushing on flange."
Two millimeters is 0.078".... that's a lot of rattle room.
If you go to this link, at the bottom there is a pdf file which is a
copy of the manual I am referring to. Step 6 pg 266,
What gives???
Can't be right. 0.00078" would be within the recommended range of 4
to 8 ten thousands. (0004" to 0008").
If I'm in a hurry I tighten the nut while turning the wheel until the
bearing is locked. Then I back it off one third turn and whack the
spindle with a hammer to release the bearing.
If not in a hurry I use a cheap micrometer that is graduated in
thousandths of an inch and keep the needle between two adjacent
thousandths marks while pulling the wheel. Never had a bearing run hot.
Gerry
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