[AT] wheel bearings

[charlie hill]

Ok,  I  just looked at the old hub.  The zero speed sensor is held in place 
by
one allen head machine screw that goes through a molded boss on the side
of the sensor assembly.  Remove the machine screw, give the zs sensor a 
twist
and a tug and it pulls straight out.  Inside you can see what I first 
thought
was the cage of the roller bearing but I then realized that it is the "hall 
effect ring".
No matter.  I would be possible to push grease through the ring and into the 
bearing.
I think you'd need to take an old speed sensor, drill it out and adapt some 
sort of
grease fitting or a pipe nipple.  That would allow you to re-mount the 
sensor housing
and attach a grease gun without messing up the hub.  Then I suppose you 
could slowly
rotate the bearing as you pump grease in, taking care not to add too much 
grease and
blow out the seal.  Then you'd need to find a way to clean up the outside of 
the hall effect
ring so the sensor would read it again.   Could work in a pinch.

By the way,  I can read the manufacturers identification on the bearing race 
on the OEM
hub that I removed.  It's clearly marked "Timken".

Charlie



Ivan,  I have the old hub in the back of my truck.  It's the factory
original piece.  I'll try to remember to check it out soon and let you
know what I find.

Charlie

-----Original Message----- 
From: Ivan
Sent: Friday, June 05, 2015 7:16 PM
To: Antique tractor email discussion group
Subject: [AT] wheel bearings

   There has been some discussion about this on Class B forum
,especially the newer chevy's .   Also a website about how to go about
greasing them . Seems they are sealed on the brake rotor side but the
back side is a dust sheild which lets the grease run out . Basically you
jack up the truck,remove wheel, brake calipers and rotor . Remove the
single allen head bolt holding the ABS sensor on . Now you can use a
needle adapter or make your own and add grease to it . All shown in the
video .
    Personal observation on my chevy, I have seen them with blue or red
grease so be carefull which you use . From what I understand they dont
mix well .  I havent found the round toit to try mine , too busy cutting
up firewood .
   Ivan          03 chevy on second pair of bearings and wobbling again
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