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  #81  
Old 01-28-2013
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Re: Frozen rudder shaft Hinterhoeller 28

Quote:
Originally Posted by BubbleheadMd View Post
Ye God, using a sawzall for this would be like using a machete to perform brain surgery.
Totally agree - a Sawzall is a demolition tool, not a precision one. It should only be used along with sledgehammers, crowbars and the like.

You want to be thinking more along the lines of a Dremel in this case.
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  #82  
Old 01-28-2013
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Re: Frozen rudder shaft Hinterhoeller 28

OK I am backing away from the sawzall and picking up the angle grinder and dremel... so I can get it loose and whack it with a sledge hammer (just kidding) :-) Thanks.
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  #83  
Old 01-28-2013
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Re: Frozen rudder shaft Hinterhoeller 28

Here's something I posted about my own experience with a spade rudder - you may need it later.

Rudder installation
I learned a VERY hard lesson over the past two days. I was re-installing my rudder - long tubed spade. The hull had to be 9' up to gain the necessary clearance to start the shaft in the tube. The shaft is thick wall stainless pipe with a web and foam/glass over and it is VERY heavy - a heavy two man job to move it.

The tube is angled back at about 20 degrees and the bottom of the blade is a continuous curve so very difficult to block or position a jack.

Beforehand I figured - no problem - set up blocking right at hand, two guys pick it up and get the shaft started in the tube and block it. Once that's done, slide it in and block it again while connecting the quadrant - easy right?

NOT.

Due to the angled tube and the curved bottom on the rudder, the shaft had a tendency to c0ck in the tube and jam when trying to get the shaft to engage the top bearing - there's a gap between the top of the tube and the top bearing where the quadrant fits over the shaft. Lining that up was a bitch due to the fact that the top of the shaft was simply squarely cut off pipe. Even when it was partially engaged in the bearing it had a tendency to dig in and jam due to the unavoidable side forces caused by the angled tube.

Here's the hard learned tip: If you have to reinstall this type of rudder, before you do anything else, grind a tapered bevel on the top 1/4" or so of the shaft, round it over and sand it smooth. This will make a huge difference in how easily it engages and slides - it will eliminate the tendency for the leading edge to dig into the bearing from the side forces as you slide it up.
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Last edited by SloopJonB; 01-28-2013 at 09:55 PM.
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  #84  
Old 01-28-2013
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Re: Frozen rudder shaft Hinterhoeller 28

Another hard learned tip - if you DO have to end up beating on it to get it out, get a big dead-blow hammer. They are plastic encased and contain a big slug of loose shot inside the head - this "surges" to the contact face when it strikes and cuts way down on the rebound of the hammer, transferring more force into the struck object. The plastic cover obviously helps to eliminate marring the struck surface.
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  #85  
Old 01-28-2013
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Re: Frozen rudder shaft Hinterhoeller 28

would hate to see you blow the bottom out around the lower flange that looks to be in the glass.
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  #86  
Old 01-28-2013
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Re: Frozen rudder shaft Hinterhoeller 28

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Originally Posted by deniseO30 View Post
would hate to see you blow the bottom out around the lower flange that looks to be in the glass.
Well... maybe not THAT big a hammer.
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  #87  
Old 01-29-2013
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Re: Frozen rudder shaft Hinterhoeller 28

Thanks all. Good ideas, lessons, and warnings. I will take it a step at a time. I can imagine installing the shaft back will be challenging as it has to slide through quadrant and top bearing basically at same time. For lift I was planning to rope under the rudder and up to both topside winches. That should allow for slow winching up of shaft. But keeping her pointed in right direction will be challenging. For now it is one challenge at a time with the cutting of the box/bearing being the immediate future (this weekend).
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  #88  
Old 01-29-2013
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Re: Frozen rudder shaft Hinterhoeller 28

Yes, definitely cut 90% or so through, and then use a cold chisel powered by a small hand sledge to pop the rest off. Very low risk of nicking the shaft. A nice tool is the RotoZip, equipped with the right-angle drive and a small, approximately 3" diamond blade. Great control, narrow kerf, and diminutive tool size. The rudder stock was SS from the factory; the bronze visible at the top was a "slug" inserted in it, machined to match the diameter of the tiller/rudder head assembly. And... that bronze slug is a little smaller diameter than the rudder stock. When I reinserted mine, I did it single-handedly, then blocked the rudder up and had a helper "scooch" it up the last 1/4 inch so I could reinsert that pin at the top (which yours no longer uses -- yours may be in that bearing/gland hub, or it may not be a pin at all... just a clamp mechanism). FWIW, that's my HR-28, hull 53, in my avatar. I have some experience with the HR-28.
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Last edited by pvanv1; 01-29-2013 at 10:22 AM.
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  #89  
Old 01-31-2013
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Re: Frozen rudder shaft Hinterhoeller 28

Well I had about 2 hours on the boat this afternoon. Poured on some of the newly arrived Kroil. I got a pipe wrench on the box/bearing but no luck. It is still frozen. I was going to just let the Kroils sit overnight but as I was about to depart I took another look at the top of the box/bearing and my sawzall sitting there. :-) With careful aim I decided the sawzall would work well to trim off the three ears of the box/bearing. I was right. Like butter it cut down and through the ears. But with ears off all I got in the way of progress was greater ease of getting a pipe wrench on. Still frozen. So then I took the blade of the sawzall and laid it exactly alongside and at same angle as the rudder shaft. Again it cut like butter with no marring of shaft. I did this for about one half the circumference of the shaft. So she is half way peeled back like a banana down to the rudder tube. I dosed her good with Kroils and will go back in the morning. The challenge I fear will be peeling the box/bearing down to the tube but then the part inside the tube still being frozen. I do not want to injure the tube or the shaft. Both will be used back. So hopefully tomorrow as the Kroils works and I peel the rest of the way around the shaft, she will come loose. Otherwise I will have to figure out how to get the remaining section still down in the tube... but for now, one step at a time...
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  #90  
Old 01-31-2013
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Re: Frozen rudder shaft Hinterhoeller 28

Give the Kroil time and maybe some passive heat to expand things. Can you get some heat lamps in there?
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