They will probably be "stuck". If you try to tighten them without backing them off, you may show more than the recommended torque and they won't move even though they may be short of the recommended torque. You'll think they are torqued properly.
It is always best to "start fresh" with the nuts backed off as if it was the first time you are torquing them. That way, there is no question about the torque applied. Dennis C. Touche' 35-1 #83 Mandeville, LA On Wed, Apr 26, 2017 at 2:40 PM, ahycrace--- via CnC-List < cnc-list@cnc-list.com> wrote: > What is the theory behind loosening the bolts before re-tightening? > > Gary > "liberty" > ---- Ken Heaton via CnC-List <cnc-list@cnc-list.com> wrote: > > Hello Ron, > > > > > > 1. What are the torque values that you’ve used? > > > > > > 3/4" Keel Bolt (aft) takes a 1-1/8" Socket, Torque to 250 lbs. > > > > 1" Keel Bolt (forward) takes 1-1/2" Deep Socket, Torque to 350 lbs. > > > > 1 1/8" Keel Bolt takes 1-13/16" Socket, Torque to 400 lbs. > > > > 1 1/4" Keel Bolt takes 1-7/8" Socket, Torque to 450 lbs. > > > > 1 1/2" Keel Bolts take 2-1/4" Socket, Torque to 600 lbs. > > > > > > 2. Did you back off the nuts and lubricate? > > > > > > Yes, one at a time. Decrease torque values by 10 % We snick up on the > final > > torque values in steps, doing all the bolts, then retourquing to a higher > > value, then repeat until you get to the final values listed above. > > > > > > 3. If so, what did you use for lubrication? > > > > > > We lubed them with Tef Gel. The function of Tef-Gel in eliminating > seizing > > galling and friction welding of stainless steel, inconel, and other > nickel > > alloys. > > > > > > Tef-Gel applied to both mating surfaces of nuts and bolts or threaded > holes > > and bolts leaves a layer of 40% solid PTFE within the thread interface, > > which works as friction barrier. Tef-Gel, which contains 0% volatile > > solvents, will no evaporate, cold flow, or dry out, giving protection > many > > years later when hardware must be dissembled. > > > > > > http://us.binnacle.com/product_info.php?products_id=8658 > > > > > > Ken H. > > > > On 26 April 2017 at 09:50, Ron Ricci via CnC-List <cnc-list@cnc-list.com > > > > wrote: > > > > > A few months ago, there was a discussion of rust stains and weeps of > water > > > appearing on the keel. My first thought had been that water from the > bilge > > > leaked around the keel bolts when the boat is on the hard. I had the > > > boatyard do some exploration. They found a void in the keel that > > > apparently filled with water. The void appeared threaded and may have > been > > > used to lift the keel. This all can be seen at: > https://1drv.ms/f/s!AhpB- > > > lul9d5YpQkMDs5DeOkS73p2. Continued inspection found that there was no > > > water leaking down from the bilge. > > > > > > > > > > > > While my boat is out of the water with the mast out, I’m going to > torque > > > the keel bolts. The C&C website lists torque values for ½” (80 > ft-lbs), ¾” > > > (250 ft-lbs) and 1” (350 ft-lbs). The 37+ may have another larger size > > > bolt. I don’t know where these came from but found something similar > > > attributed to an employee of Mars Metal (keel manufacturer?). Can any > > > other owners confirm a few things? > > > > > > > > > > > > 1. What are the torque values that you’ve used? > > > > > > 2. Did you back off the nuts and lubricate? > > > > > > 3. If so, what did you use for lubrication? > > > > > > > > > > > > Regards, > > > > > > *Ron* > > > > > > Ron Ricci > > > > > > S/V Patriot > > > > > > C&C 37+ > > > > > > Bristol, RI > > > > > > ron.ri...@1968.usna.com > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > _______________________________________________ > > > > > > This list is supported by the generous donations of our members. If you > > > wish to make a contribution to offset our costs, please go to: > > > https://www.paypal.me/stumurray > > > > > > All Contributions are greatly appreciated! > > > > > > > > > _______________________________________________ > > This list is supported by the generous donations of our members. If you > wish to make a contribution to offset our costs, please go to: > https://www.paypal.me/stumurray > > All Contributions are greatly appreciated! >
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