As best I can remember, that was my experience the first time I retourqued mine. But that was a number of years ago. At that point it had likely been many years since anyone had checked the torque on the keel bolts. They seem to hold their torque better as I check them every few years. I should probably check them every year.
I'll put that on my list. Ken H. On 18 January 2018 at 23:45, Josh Muckley via CnC-List < cnc-list@cnc-list.com> wrote: > Ok so tomorrow is the short haul for keel bolt torque. Tonight I collected > all of my tools at the boat and did a dry run by taking a few turns off of > each nut and then retorquing to about 75%. I wanted to make sure that any > issues with tools and access were ironed out early. > > Everything worked fine. I definitely think that using and extension on > the output of the torque multiplier is the best way to go. Any amount of > separation between the multiplier and the wrench causes bizarre twisting > actions that are hard to stabilize. Keep the wrench directly attached to > the multiplier. I measured the length of the extension I would need as 13" > and ended up having get one that was 16". Glad I did cause it barely gets > the multiplier head clear of the floor. > > All the nuts came loose and I feel comfortable that tomorrow they won't > throw me and curves. I'll clean, lube, and reinstall them one at a time > while on the hard. All of them took considerably less than their torque > rating to loosen which indicates to me that they were indeed loose. This > reinforces my decision to do the work which is cathartic because in the > back up my mind I kept saying, "Everything seems fine, you're just going to > make things worse." Oddly the 4 largest nuts were by far the easiest to > loosen. It is a little disconcerting since I don't understand what the > implications are. > > I'll let everyone know how things go tomorrow. > > Josh Muckley > S/V Sea Hawk > 1989 C&C 37+ > Solomons, MD > > On Jan 2, 2018 3:18 PM, "Josh Muckley via CnC-List" <cnc-list@cnc-list.com> > wrote: > >> Ok Guys, >> Since I have the mast out, this provides the rare opportunity to access >> ALL of the keel bolts. I've measured each of the bolt and nut diameters >> and checked the archives for torque specs. I intend to buy a toque >> multiplier and the appropriate sized sockets. I think I can do it for less >> than the yard is going to charge and I'll come out of it with some tools. >> I'll also be able to tell myself that it was done correctly. >> >> That being said it sounds like the best practices are are follows: >> - be on the hard >> - loosen the bolts one at a time, clean, and lubricate with tef-gel >> - reinstall and torque at progressively higher levels. >> >> I was unable to find the torque spec for my 1.5" bolt in the website but >> Ken Heaton cited 600lbs in one of his past responses. >> >> Keel bolts (fwd to aft): >> Nut stud torque >> 1 - 1 1/2 (38mm) 1 (25mm) 350 >> 2 - 2 3/16 (56mm) 1 1/2 (38mm) 600? >> 3 - 2 3/16 (56mm) 1 1/2 (38mm) 600? >> 4 - 2 3/16 (56mm) 1 1/2 (38mm) 600? >> 5 - 1 7/8 (47.5mm)1 1/4 (32mm) 450 >> 6 - 2 3/16 (56mm) 1 1/2 (38mm) 600? >> 7 - 1 1/2 (38mm) 1 (25mm) 350 >> 8 - 3/4 (19.5mm) 1/2 (13mm) 80 >> >> >> *Anything I'm missing?* >> >> >> Thanks, >> >> Josh Muckley >> S/V Sea Hawk >> 1989 C&C 37+ >> Solomons, MD >> >> _______________________________________________ >> >> Thanks everyone for supporting this list with your contributions. Each >> and every one is greatly appreciated. If you want to support the list - >> use PayPal to send contribution -- https://www.paypal.me/stumurray >> >> >> > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > > >
_______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
