Tools required:
Trolley Jack
13mm or 5/8 sockets or spanners
Knocking stick (hammer)
A couple of blocks of wood
Screwdriver
The first piccie shows the keel in it's normal position on the trailer. We removed the trailerboard which the keel rests on, so that the jack could take the weight of the keel. Using the keel winch the aft section of the keel was lowered on to the trailer to allow the trailer to take half the weight. As the top of the keel at the forward end above the pivot hole remains in the keel casing the keel cannot 'fallover'. Bear in mind though the keel weighs 200kg+.
The jack was positioned under the front of the keel about 20cm aft of the leading edge. The weight of the keel and boat was then taken on the jack.
On each side of the keel are 4 threaded studs with nuts. These are all stainless with two locating the plate and two holding the keel bolt hangers in. Undo carefully the two outer nuts being sure to not shear the studs. Though to do this you would have to use a lot of force. On Aretia the inner two studs on either side had double nuts. If you try an undo only the outer nut you will find the whole stud spins, so grip the top nut with on open ended spanner to stop this. I'd suggest taking the outer nut off completely and only loosen the top nut about 10mm.
We then lowered the jack slightly to check we'd undone the correct bolts and you should see the whole plate fall away slightly. Jack back up and proceed to finish removing all the remaining nuts. The plates should then come of easily once you have a screw driver behind it.
It's then a case of putting the hangers back in, pin in and gently jacking the keel back up. Don't be a pillock and do what I did and put the first hanger in upside down. Be careful not to damage the threads on the bolts. A little gentle persuasion from the hammer on the keel helps to true the upward movement. Once all up, add the plate and bolt up tight. Once secured drop the jack back out of the way. After completing once it should be only a half hour job every year.
No comments:
Post a Comment