pulling shaft off Hurth ZF250 trans flange - SailNet Community
 
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post #1 of 7 Old 10-22-2009 Thread Starter
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pulling shaft off Hurth ZF250 trans flange

On my Endeavour 42 I have a Hurth ZF250 trans. I have the flange bolts off and I'm trying to get the shaft off the flange. I've seen MaineSail's PBase photo essay. Wish mine was that easy.
The trans side flange is deeply cupped so putting a socket there doesn't really work. Tightening the bolts very far bottoms them out on the trans housing. I tried taping a nut as a spacer in the cupped area but tape won't hold to the rusty oily metal.
I thought about putting a heavy steel bar across the trans side flange but I'm concerned about the uneven pressure that would put on the flange as I tighten down.
Due to the very tight space, I can't get a picture of the trans flange.

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post #2 of 7 Old 10-22-2009
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Ed,
An alternative to squeezing the two flanges together with a socket in between is to use an actual puller. This would only work if you can slide the propeller shaft aft enough to get the puller in there. Anyway the puller I speak of has a funny four fingered arrangment kind of like the peace sign with a threaded screw in the middle. You would bolt the peace sign portion of the puller onto the propeller shaft flange and then start screwing in the threaded rod in the middle, that is going to press the shaft out. I've done it that way myself one time. I'll see if I can find a picture of the puller I'm talking about.


Ray
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ray

that may be the way to go.

suggestions on where to get one of those? Is that a marine tool?
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post #4 of 7 Old 10-22-2009
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I bought a set from Snap-on years ago when I turned wrenches. I would think your local NAPA store ought to have one. To be honest, I'm not sure what that kind of puller is called. It took me a while to find a picture of one and that was under steering wheel puller, but the one I have is a lot heavier duty than that one. I'll keep looking.

Ray
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Sears sells something similar. They call it a harmonic damper puller

http://www.sears.com/shc/s/p_10153_1...pecialty+Tools

Ray
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post #6 of 7 Old 10-22-2009
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Xort! we used 4 pieces of threaded rod instead of bolts! it worked but was still very difficult! A deep socket and then a peice of pipe that fit between as the shaft mover deeper into the flange hub. Caution, the flange on the trans is cast and easy to break. Don't buy pullers at harbor freight!

Denise, Bristol PA, Oday 30. On Tidal Delaware River, Anchor Yacht Club.
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Quote:
Originally Posted by erps View Post
Sears sells something similar. They call it a harmonic damper puller

http://www.sears.com/shc/s/p_10153_1...pecialty+Tools

Excellent Ray

For $20 I can't go wrong
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