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The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.
So I bought a 10 year old used EZ Loader Trailer that had been built for a power boat, then converted for a 28' fixed keel Columbia sailboat (4'10" keel), then I cut down supports to fit my swing keel Catalina 25.
I had my boat hoisted onto the trailer for the first time last Saturday, all kind of adjustments had to be made on the fly, but the thing that really got me was the front roller and the the rear bunks that support the entire weight of the boat are both supported on pivot bolts that allow the cross bars to rotate back and forth. In other works, the entire weight of my boat is supported by 4 bolts!? Is this how everyone's trailer is? It seems to me I want to get a weld torch in them somewhere. The trailer does have a heavy metal plate down at the axle height that I lowered the tip of my keel onto.
I have 4 racks of rollers that are secured by one bolt per rack, then the forward roller (a fifth bolt) that carries very little weight and then the tail end of the keel rests in a channel that is welded to the frame. You <i>are</i> using hardened steel bolts?
Wasn't it the DC 10s that had and still do have the engine fastened on by one bolt? Of course a few fell off a number of years ago. Any time you have motion such as the bolt holding on the roller racks they probably should be checked every few years but the odds of them all failing at the same time isn't very great and most of us probably don't worry much about them. With the weight mostly taken off by the keel support there isn't really much weight on each set of rollers.
Bill: Sorry for not responding earlier; computer problems. However, I looked at my EZLoader that I used to deliver Suede Shoes . It has four sets of rollers, 8 rollers on each set for a total of 32. The 2x2 metal "tube" that holds the rollers is held up by 2 pieces of aluminum plate that might be 1/4" thick/ 20" tall or so? and maybe 5" wide. They are on each side of the frame of the trailer, attached with 2 larger 1/2"? bolts, one below the frame, one above it. The front sets do not pivot fore and aft at all; the rear ones have one "Pivot" bolt through the frame and a second bolt above it but all the weight IS carried by the one bolt. The 2x2 "roller racks" are attached to the plates with 2 bolts, so they don't "pivot" fore and aft, only the rollers tip "sideways" as it were, to accommodate the shape of the hull. The back ones (the aluminum plates) pivot through maybe 25 degrees or so,
So, my trailer is much like yours. In essence, the weight of the boat IS carried on 4 bolts, but they are husky: 1/2" I think. As someone else mentioned, lowering the keel will take a lot of weight off the rollers and bunks. I think you're okay. If you ever get down my way, give me a shout and come look at Encore!'s trailer if you'd like. She's still in the water at present, but the trailer is at home in Battle Ground. 360.687. 2048. I am now on winter vacation from the college, so I can be available for the next month or so. Good luck and Merry Christmas.
Notice: The advice given on this site is based upon individual or quoted experience, yours may differ. The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.