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Thread: The Early 80's

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  1. #21
    Join Date
    Mar 2013
    Location
    Chicago
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    3,988

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    Item 6

    Tag Axle Spindles and inner oil seals.

    20190908_114444.jpg

    heres where the inner seal of the hub rides on the spindle. This is NOT the tag its the drive axle hub in the picture. big radius, just wonderful. almost impossible to mif it and nick the seal going togeather.

    20190908_114505.jpg

    Here is what u get on the tag spindle. This carries through to mid 90s same stuff and in other aspects to this day with round nuts and pinch nuts.

    Look at the unbelievably stupid seal riding surface on the tag spindle compared to the drives. Zoom in on this one. Id like to meet the guy who signed off on this design. Why would u not put a smidge of a radius on this??,

    Because of this regardless of who pulls a tag hub IE local shop, prevo, yourself, me, keep a closer eye on the backside of the wheel to be sure the seal isint nicked on the friggin 90° Edge on the spindle. It only holds a pint full and it can drain in a hurry if it leaks. Yes u can go in for a leaky seal and leave with 1 too. Sorry. keep an eye on it till u know its ben put good after service here.

    Because of this design this procedure has M.I.F. written all over it. Be conch any time the tag hub is being removed from the spindle.

    So now, how tight is tight???????

    I always mention about how u should always index the hub before u disassemble it, see how mamy exposed threads u can count on the spindle before u loosin it. ITS CRITICAL FOR A NOVICE to do this on these tag hubs. The seal goes up SO TIGHT a novice might assume the hub is tight when its fsr from it. Il get the hub up put the outer bearing in and get the nut started. Then snug the nut turn the hub while hitting with a large rubber mallet snug the nut again and repeat until the 2 nuts and washer expose the same amount of threads on the spindle that u had before u disassembled it.

    if u set the inner nut correctly (its a round nut) do this after u verifyed the seal is completly seated. Then turning the round nut back a tic till its free then back tight, EASY, like safe crackin, by hand,easy, feeling close, find exactly where the round nut touches the bearing, that exact spot.

    Next, this is where many blow it.

    Turn it back loose 50°(aprox. friggin round nut). On a regular nut its exactly 1 flat spot of the nut backed off.

    If u have it good u will feel 1 or 2 1,000ENTHS of jiggle if to grab the hub and jiggle and see. AND then, after u run up the second locking nut up the jiggle in the hub goes away. That would be just about right. They say u can have a couple thousands in there tight but i think this tends to cause scuffing on the spindle where the inner races on the bearings ride.

    Choice is yours either way is within spec, sorta. Do u trust me? I told u my coustomers have been refered to as test pilots. Scatterbrain Service right? LOL

    Whos gonna be my next test pilot??

    Oh I neglected to mention the steer axle has the same desined spindles.
    Last edited by Joe Camper; 09-08-2019 at 03:17 PM.
    1990 Peterbuilt 377
    3406 B Caterpillar
    13 Speed Roadranger
    No Norgrens


    1 day on paper no machines

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