Seconding what Dennis said, it is never a bad idea to put some anti-seize compound or moly grease on the threads to prevent corrosion in the future. Re-torquing nuts that are rusted in place gives a false reading every time. Chuck Gilchrest S/V Half Magic 1983 35 Landfall Padanaram MA
Sent from my iPhone > On Apr 26, 2017, at 4:00 PM, Dennis C. via CnC-List <cnc-list@cnc-list.com> > wrote: > > 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! > > _______________________________________________ > > 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!
