[TowerTalk] replacement bolt for Rohn Thrust bearing

[K7LXC@aol.com]

In a message dated 9/26/00 6:41:30 AM Pacific Daylight Time, kr1g@hotmail.com 
writes:

> Need to replace a bolt in a Rohn Thrust bearing (Its the larger one, the 
>  TB-4? I think)
>  
    Are you talking about the bolt that go vertically through the flange and 
bolts it to the top of the tower or the horizontal bolts that clamp the mast?

    The TB-3 is the 2-inch bearing, the TB-4 is the 3-inch bearing - go 
figure. 

>  Any suggestions on what I can use - ordinary hardware bolts???
>  anyone know the size to minimize tower trips.

    These are fairly garden-variety bolts but it's helpful if they're 
galvanized or stainless steel. The mast-gripping ones rust out fairly 
quickly. I think the mast ones are 3/8" - length is about 3". You shouldn't 
ever have to replace the large flange bolts.    

    Sorry - you've got to climb the tower at least once. Get a couple of 
different sizes and take them all up with you so you've got all your bases 
covered. Swap them and descend; about a 10-minute job.

Cheers,   Steve    K7LXC
Tower Tech

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