Friday, August 8, 2008

Mounting Primary

Measured and marked holes with base of winch. Masked whole area with 3M tape to contain mess. Drilled holes oversize with 3/4 inch forstner bit. Mixed west system and pre-filled holes with unthickened epoxy. Went below and drained each hole back into mixing cup. Mixed in colloidal silica thickener until mayo consistency. Injected thickened epoxy into holes with syringe. Only filled up to 1/8 inch below surface due to the fact that the epoxy rises a bit. Here's the hardened result. Spent all night cleaning/re greasing, and building primary winch.
Ground the hardened epoxy down to the surface. Acetoned, then put base of other winch down and centered the holes over the enlarged, filled holes, and marked with a marker. Removed winch base and predrilled a pilot hole with a small bit on low at a slow speed in order to prevent the epoxy from cracking. I then drilled a 3/8 inch hole through the pilot hole in order to facilitate the 5/16 bolt of the primary. I recessed the holes with a 3/4 inch recess bit(chamfer). This will allow more sealant to collect around each bolt and form an o-ring of sealant. I then acetoned the holes, the base of the primary, and the bolts. I put down a generous amount of 3M 4000UV sealant around each hole and the perimeter of the base. I then installed the base of the winch. I went below and installed the fender washers and lock nuts. I tightened everything down with an impact driver. I went topsides and cleaned the excess sealant from the edge of the base. Removed the tape surrounding the base. Acetoned everything until satisfied. and then put the winch drum back on the base.
Here is the final result and I only have three more to go. (I'm not reinstalling my halyard winches, I'm only mounting my secondaries which will double as halyard winches. I'll just need to buy locking snatch blocks in order to free up my secondaries for raising the spin halyard, and just change the genny sheet on my primaries to spin sheet, and vice versa.

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