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Vladislav

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Posts posted by Vladislav

  1. Thanks again for the advice.

    We deal with Barry sometimes, he's a classy guy.

    It looked he was being busy and re-directed me to Tracy.

    He's also very good but used to be slow.

    This time I found the correct seals locally (SKF) so didn't want to disturb Watts folks with no actual need.

  2. Here the magic begins.

    Stemco 392-9094 and SKF45099 are both what I was going to see there, 4-1/2 x 5-3/4.

    But the hubs no doubt have the bores for 6.

    Combined with 5-5/8 sleeves it was asking for different seals, and I figured out they exist - Timken 370025A, 380025A, SKF 46305.

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  3. I have all the wheels and hubs off my 1990 MH613 removed.

    The plan was to paint them and change some tires.

    Having apart I found most of the bearings worn out so I ordered them and they're on a shelf now.

    When I started to look for hub seals Stemco parts catalog gave me 4.5 x 5-3/4 for rears and 572/582 with 563/567 bearings in the same 38000 Mack hubs. The bearings I've got are almost these although the hub's actual measurements gave me 5-5/8 x 6. I recognized such seals but they described "for trailer hubs".

    Looking the axle housing spindles I noted the sleeves pressed on with 5-5/8 OD. They seemed made with a lathe but too might be factory.

    All this looks strange to me. I see no trouble to put different seals but want you to know does anybody meet such the setup?

    The hubs look as common 38000's (34000's-?), there's written "Mack" on one of the spokes and "Canada" on the other.

    Thanks for any input,

    Vlad

    post-3971-0-59847300-1416578405_thumb.jp

  4. I use to work with hypoid gears on 4x4 off road pick-ups.

    Have never done them just conicals.

    They might be easier although I read in some book long ago that hypoids are a kind of self-setting.

    You may (and should) apply some paste or just paint to check out the contact trace, it's described in many old books, probably on the net also.

    Check out a gap in between the teeth mated, must be 0.07-0.18 mm for a big car, I thing 2-3 times more for Mack would be Ok. Better to find out the correct figure. For a car people used to put a piece of newspaper in between the teeth and if they start feeling jam it's Ok.

    An important thing is bearings pre-load. In car diffs there's deformed pipe you just press when turn the yoke nut up and measure resisting torque of a pinion/bearings assembly. In CRD's there's a hard pipe between the inner bearing races so you need to grind it off (on a sand paper layed on a glass for example) to increase the pre-load. If you overgrinded you need to swap it with a longer one or maybe use a hard shim. Important note - if you want to go with the turn over torque that's specified you need to check it out with bearings washed and DRY. After you put oil in them they will start turn much easier.

    Thank you for the PAI parts ##.

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