I changed the oil. Im kind of sorry I did, it was very clean. I did a flush
with about 1/2 a quart, no debris came out so I think I am good to go for
another 20 years. At least I know the oil is Mobil 1.
Thanks
73
Kent
NC6B
On Fri, Mar 3, 2017 at 9:10 AM, <K7LXC@aol.com> wrote:
> > I am going to do a gear oil change on a Hub City gear box on my US Tower
> HDX572 MDPL. The recommend oil is Mobil 1 SCH634. In reading on the Mobil
> website for this oil it says "*Filled for life gearboxes*, especially high
> ratio/ low-efficiency worm gears". Should I worry about changing the oil? I
> bought this tower used, 3 years ago, and it is in great shape but I have
> never changed the oil in it. As far as I can tell the tower was built in
> the late 1990's. I dont know if the oil has ever been changed. The gear box
> doesn't make a sound when working.
>
> Usually my LXC Prime Directive - "DO what the manufacturer says" -
> answers these questions. Perhaps there's already Mobil 1 in there. Maybe
> not.
>
> Since the manufacturer, Mobil and not UST - says Filled For Life, I
> might change it to the Mobil 1 to remove all doubt and let it go another 20
> years before contemplating doing it again.
>
> Heat kills the lubricating additives in oils and your gearbox is
> probably run so infrequently that it probably doesn't heat up much so the
> life saving additives are still active years later. Typical gearboxes in
> commercial applications may run dozens or hundreds of times a day so ham
> use would be considered very light duty.
>
> OTOH I'm always of the mind of "If it ain't broke - don't fix it".
> Drain a little out and see how it looks and then make your decision.
>
> Cheers,
> Steve K7LXC
> TOWER TECH
>
>
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