[TowerTalk] Safely Unscrewing Cap Screws on the TX-472 Hub City Worm Gear Box

[Alan Swinger]

I replace the oil once or twice a year. I use an allen wrench to remove the drain plugs - bottom and side (side to check re-fill level), and a small open end wrench to open the top nut that has the breather hole. Since I do this with the tower vertical, had to get the allen wrench short end cut down a 1/2 in or so to fit between frame and allen nut (poor design by UST).
Once drained, screw in bottom drain allen nut ( I use plumbers tape to prevent leaks), fill until oil runs out of side nut drain hole screw in that nut, then put top fill nut back on with the wrench.

Should you happen to have the tower horizontal, the draining evolution is easier and cleaner!

73,
Alan K9MBQ

-----Original Message-----
>From: Fred Hurd <fred.hurd at cox.net>
>Sent: Aug 9, 2016 8:38 AM
>To: "towertalk at contesting.com" <towertalk at contesting.com>
>Subject: [TowerTalk] Safely Unscrewing Cap Screws on the TX-472 Hub City	Worm Gear Box
>
>Please some good advise for safely unwinding (and rewinding/tightening) the cap screws on the TX-472 US Tower Hub City Gear Box in order to drain and refill the oil lubricant. The Cap Screws on my unit are heavy painted, so I will need a safe procedure for loosening the screw without causing damage. Advise from someone who has replaced the oil in their unit would be greatly appreciated.
>
>Fritz (W4PKU)
>Herndon, VA
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