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Author Topic: Pictures of the sloppy rudder bushing repair - A32  (Read 80 times)
SailorGuy
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Posts: 16


« on: July 13, 2017, 07:31:02 PM »

I'm currently in the process of repairing the slop in the lower and up rudder bushings of my 1987 Aloha 32. The lower "bushing" is actually not a bushing at all and is just a fiberglass tube. The upper bushing is a plastic material that screws into the floor of the cockpit by the wheel. The top bushing had wore out and it was .020'' over the size of the rudder stock (the shaft the rudder turns on). I ordered a 4'' x 12'' round piece of Delrin (like nylon, but better) for the replacement bushing to be made out of. It is at the machine shop now and I'm waiting to get the new bushing back which will be .003'' over the size of the rudder stock.

For the lower "bushing" I will use West systems epoxy repair method. You can find information on this by searching online for West System's Fiberglass Boat Repair manual. The process consists of mixing colodial silica, graphite powder, and the west systems epoxy and creating a mixture that has a viscosity similar to mayonnaise. After dropping the rudder, three to four holes need to be drilled around the outer circumference of the lower rudder stock housing and through these holes the epoxy will be injected with syringes. Prior to this, the rudder stock must be coated in a mold release agent/wax to prevent gluing the rudder in place (I really hope this does not happen....). Re-install the rudder and now you are ready for the epoxy injection. After injecting the epoxy you need to break the rudder free frequently after the epoxy has begun to harden.

I am still waiting for the new upper bushing so I have to start the lower bushing repair with epoxy, so I will post pictures on this threat as the project continues


* 1.jpg (21.04 KB, 107x142 - viewed 12 times.)
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SailorGuy
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Posts: 16


« Reply #1 on: July 13, 2017, 07:36:14 PM »

More Pictures


* 2.jpg (19.63 KB, 121x91 - viewed 35 times.)

* 3.jpg (23.08 KB, 162x121 - viewed 5 times.)

* 4.jpg (22.94 KB, 162x121 - viewed 5 times.)
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SailorGuy
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Posts: 16


« Reply #2 on: July 13, 2017, 07:36:52 PM »

More Pictures....


* 5.jpg (19.33 KB, 121x162 - viewed 5 times.)

* 6.jpg (20.47 KB, 121x162 - viewed 6 times.)

* 7.jpg (23.41 KB, 162x121 - viewed 5 times.)
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SailorGuy
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Posts: 16


« Reply #3 on: July 13, 2017, 07:37:43 PM »

and more pictures....


* 8.jpg (21.62 KB, 121x162 - viewed 9 times.)

* 9.jpg (12.01 KB, 162x121 - viewed 8 times.)

* 11.jpg (24.16 KB, 162x121 - viewed 7 times.)
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SailorGuy
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Posts: 16


« Reply #4 on: July 13, 2017, 07:40:18 PM »

This forum would not allow me to post the pictures in their original sizes and they are a bit hard to view now. If anyone would like better pictures, just send me your email and I will email them over to you.

Also, for the Delrin rudder bushing material, I ordered it from international plastics online. Delrin is a superior choice over nylon because it will not swell with moisture. The 4'' x 12'' round piece of Delrin stock cost me $65 plus $15 in shipping.
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Holdech
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Posts: 159


S/V Teliki, HYC - Toronto ON


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« Reply #5 on: July 20, 2017, 09:18:54 AM »

How did the epoxy injection work out? Curious how you did this as I've tried injecting thickened epoxy with a large syringe and it didn't work so well. I ended up tapping and screwing in grease nipples and using a grease gun to get the epoxy completely in the cavity. Grease gun is essentially a "one shot" as I couldn't get it cleaned out sufficiently to use again (despite running a litre of acetone through it).

Also interested in how smooth your steering is. Ours is hard with any pressure on the rudder or when motoring. I'm thinking possibly the udder shaft is bent slightly.

Chris
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