CD36, bottom rudder pivot sloppy

[Jerry Kimble]

Hull #086, in dry dock has a very sloppy lower rudder pivot on the rudder and the pivot pin is free to move but not sloppy in the hull bearing. The yard said they could pack the area with teflon. I asked them to remove the rudder so we can see what is going on there. Has anyone had this problem? Are drawings available? Does anyone have any suggestions? Also a surveyor pointed out some pitting on the upper rudder shaft and said I should have the yard cut away some of the rudder to make sure the shaft is not worse in the rudder housing? Also the lower pin does not rise when the rudder is pried up.



jkimble@mcn.org

[Patrick Turner]

If you do a search on the subject you should find a good post on this very thing from Duane Yoslov. The rudder post deadends into a big bronze shoe that is glassed into the hull. Packing with teflon wouldn't work, but you might be able to press in sleeve. This I think still involves removing the shoe. You'll have to scrape away some glass to find the outline of the thing. I think there are some screws that need to be removed. Anyway.....like I said, do a search under rudder of Duane and try to find that post.

Pat



patrick.t@home.com

[Duncan Maio]

Jim Stull recently did a repair like this on his CD27 - if the assembly is the same, there is a stainless pin that sits in a fitting in the base of the rudder and in the heel fitting. I don't recall the details, but I believe jim waxed the shaft, drilled a couple of holes in the rudder at the top of the fitting, assembled the whole thing (alignment is very important) and injected a special West System epoxy mixture that filled the empty spaces in the rudder. Once cured, the pin can be removed, but there is no slop left. As I recall, Jim also pressed a bronze bushing into the heel fitting to remove some slop there.

Duncan Maio
s/v Remedy
CD27 #37
Bristol, RI



dmaio@meganet.net

[matt Cawthorne]

Jerry,?p?The shoe at the bottom of the rudder is held in place with 3 pins. Each pin is put in place then it is hammered over like a rivet. The entire assembly is glassed in to be fair with the rest of the hull. Big job.?p?If you cut some of the rudder away to look at the shaft please post the findings. I do not have any evidence of problems on my boat, but have wondered about this very fact. I helped my brother with his (non C-dory) boat and found that just under the edge of the fiberglass crevice corrosion had eaten some very deep pits. Very ugly. ?p?The lower pin does not rise up on my 1982 CD-36 either. Has not since I bought her in '93. I have always suspected that it was designed that way. ?p??p?Matt?p??p??p?Are drawings available? Does anyone have any suggestions? Also a surveyor pointed out some pitting on the upper rudder shaft and said I should have the yard cut away some of the rudder to make sure the shaft is not worse in the rudder housing? Also the lower pin does not rise when the rudder is pried up.?p?



mcawthor@bellatlantic.net

[len]

jerry

look back (? March/April this year) for posts by me and later ones by jim stull - i believe all the bigger CD's have the same system: a bronze shoe attached to the bottom of the keel with pins and glassed in, the shoe has a stianless post FIXED permanently into it - the combination of shoe/pin is the pintle - the pin of the pintle goes into a gudgeon, a brass or bronze cyclinder that is glassed into the lower part of the rudder -

i had to pull my rudder, have a new pin fixed into the bronze shoe, and the gudgeon had to be bored out to make it a true cylinder -

mine had been a little loose for a few years and then dramatically much looser over a short period of time - nevertheless the system is such that it is unlikely to totally fail even if everything is completely loose (and the rudder has a fitting at the top to keep it from falling out even if the pintle/gudgeon did fail)

good luck

len



md.frel@nwh.org