Prop shaft / cutlass bearing overhaul - Page 2 - SailNet Community

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  #11  
Old 05-27-2013
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Re: Prop shaft / cutlass bearing overhaul

Well, it took several hours contorted in a locker to implement my unistrut puller, but in the end I prevailed! (the harmonic balancer puller was a no-go because I couldn't find short pusher screws.) I had to use 3 different length pusher bolts stepping up by 1/4" each time due to the limited clearance, and the damned thing fought me until the end! I am still feeling the pain from the extended contortion act I had to go through to get enough power to the wrenches!



Here is a better look at the puller and the defeated coupler! Note the hard earned celebratory beer!



The Cutless bearing also gave me some trouble. The brass part of the bearing was so thin that getting a puller on it wasn't going to happen, so I took a hacksaw apart and reassembled it inside the bearing and cut it in several places. Even after being cut it didn't want to come out until I went at it with a pin punch and a cold chisel to get it peeling up. I pressed the new bearing in with a length of reddi rod and some fender washers on each end. Then it was just a question of winding it in. Initially I used 2 washers on each end. but they started going concave with the force it took, so I stacked 4 washers on each end! At least I know it's not going anywhere!

Hopefully that is the last time I have to do that job on the boat!
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  #12  
Old 05-27-2013
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Re: Prop shaft / cutlass bearing overhaul

Congrats. I'm sure you have a real feeling of satisfaction after all of that. One trick that would have made putting the bearing in easier is to chill it in an ice bath before installing it. It reduces the diameter and makes sliding it in easier.
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Old 05-27-2013
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Re: Prop shaft / cutlass bearing overhaul

Nice work!.. and good patience too!
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  #14  
Old 05-27-2013
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Re: Prop shaft / cutlass bearing overhaul

Pain of taking it all apart is so easy to forget .. But then, the pain of putting all together WITHOUT a hammer is another memory best forgotten....
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Old 05-27-2013
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Re: Prop shaft / cutlass bearing overhaul

Congrats on completing the job!

I went down this same path a year ago, and ended up cutting the shaft out (in several pieces). You can read about it here; Contemplating a drive line overhaul

It wasn't pretty, but I am confident that the job was done right. If not, I know who to blame.
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Old 05-27-2013
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Re: Prop shaft / cutlass bearing overhaul

I wouldn't post that picture of the coupling on my boat. That area is so far out of reach that it looks like the Pit of Despair, filled with unreachable crud. If only my teenagers would fit in there. Oh wait, they would! They would just think me the stupidest man on earth for asking them to go in there with some cleaner and a rag.
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Old 05-27-2013
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Re: Prop shaft / cutlass bearing overhaul

Quote:
Originally Posted by Ritchard View Post
I wouldn't post that picture of the coupling on my boat. That area is so far out of reach that it looks like the Pit of Despair, filled with unreachable crud. If only my teenagers would fit in there. Oh wait, they would! They would just think me the stupidest man on earth for asking them to go in there with some cleaner and a rag.
Oh don't worry, I cleaned the whole area up while I was down there. The stuffing boxe is no longer green, and the rusty coupler is now volvo green. I can't do all that work and not have it LOOK better too!
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Old 07-11-2013
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Re: Prop shaft / cutlass bearing overhaul

You can instal shaft bearings as a clearance fit just using a low temp epoxy as a bedding, securing method. This can help with alignment check of bearing carriers as well. By doing a dry run installation with shaft supported/chocked you should be able to slide the new bearing up the shaft and spin it in the bearing carrier, once this is achievd you know carrier and shaft are aligned (many P, V strust, brackets aren't). Coat in epoxy and insert.

Removal is easy in metal carriers as you just heat the carrier and epoxy softens, or if in a GRP tube then bearings can be coated in release agent and they will split away with a well placed sharp thin wood chisel.

Clean up the bore with a piece of coarse sand paper/cloth on the end of a rod attached to a drill.
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Old 07-31-2013
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Re: Prop shaft / cutlass bearing overhaul

Quote:
Originally Posted by SchockT View Post
I pressed the new bearing in with a length of reddi rod and some fender washers on each end. Then it was just a question of winding it in. Initially I used 2 washers on each end. but they started going concave with the force it took, so I stacked 4 washers on each end! At least I know it's not going anywhere!
Next time you could get a shaft bearing finished as a clearance in the carrier (strut/Pbracket/stern tube) then you just coat in epoxy and slide it in, removal just heat the carrier, or if it's a stern tube in GRP you can split some bearings with a sharp shisel. This method is used on commercial boats so it does work, it can also allow you to check the carrier alignment as you can a dry run installation. With shaft chocked you should be able to slide the new bearing up the shaft and spin it in the carrier, if you can the carrier is aligned.
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