On 04/20/07 12:03 pm jcowens1@comcast.net wrote:
> Dick (K5RR):
>
> I have had the same problem you are having with the stall upon raising the
> tower and have resorted to doing the same thing you do. If I briefly lower
> the tower and then switch to raising, it usually takes off and raises the
> tower. Once it is under way, it doesn't hesitate or stall the rest of the way
> up. There is friction between the various sections and they told me to use
> bees wax on the tower areas where there is abnormal friction. I bought some
> and put it on and it did help the situation.
I don't have the docs. in front of me at the moment, but I thought they
said to use automotive grease.
> I guess it is kind of a tradeoff situation. You can't have an overkill on
> power to move the sections as that might put unreasonable stress on the
> cables and result in a breakage. Before I put the bees wax on the tower
> innter surfaces, it used to bind slightly towards the end of travel up. It is
> better with the bees wax.
>
> Regarding oil, I changed mine last year and I am pretty sure I used regular
> automobile differential oil (90 wt?). The Hub City (gearbox mfr) literature
> I have says GL-90 for temps between 15 and 60 DEGF, or GL-150 for temps
> between 50 to 125 DEGF. It says to change it after every 100 hours of use.
> For me, that is about every 20 years. I chose GL90 because of the lower
> viscosity. I talk with Gary Smith at UST when I have questions (559)733-2438.
> He has been there a long time and seems to be the most knowledgeable.
Again, I thought they said "gear oil." I know that differential oil
could be different, but whether it's worse I don't know.
> By the way, you don't have to buy their replacement v-belt as a Dayco 4L350
> from Schucks Auto (or equiv) works just fine at about 1/5th of their price.
> These should be replaced periodically as you never want to have one of these
> come off or break. All of my expoeriences and information relate to my HDX
> 572 MDPL which should be equivalent to yours in these areas
Although a belt failure with a worm drive gearbox doesn't allow the
tower to come crashing down.
73
Alan NV8A
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