Trailer Repair |
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mcbean7
Groupie Joined: April-30-2008 Location: United States Status: Offline Points: 64 |
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Posted: June-21-2008 at 8:43pm |
Hi Guys. My bunks are in desperate need of replacement. My question is how do I get the boat off the trailer without taking it down and leaving it at the lake?
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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The procedure is in a thread some place but it's just as easy for me to repeat it as to find it!
Lower the jack stand all the way. Block the rear corners of the boat as close to the bottom as possible using concrete blocks and wood blocks. Raise the jack as much as possible. Block the keel a couple feet in front of the first cross member. Lower the jack stand. The trailer should now be free and the boat sitting on the blocks. Now you'll need a jack. Move the trailer forward as far as possible, jack the keel and relocate the blocking behind the first cross member. You may need to do this a couple of times until the trailer is completely out from under the boat. |
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mcbean7
Groupie Joined: April-30-2008 Location: United States Status: Offline Points: 64 |
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thx for the quick reply Pete. Will an automotive jack do the job?
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mcbean7
Groupie Joined: April-30-2008 Location: United States Status: Offline Points: 64 |
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Also, will the 8"X8"X16" concrete blocks from Home Depot be strong enough to support boat?
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bkhallpass
Grand Poobah Joined: March-29-2005 Location: United States Status: Offline Points: 4723 |
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You really Shouldn't need to pull the trailer out from under the boat to replace the bunk boards. Lift the boat up as Pete suggests, and you should be able to unbolt the bunks, and slide them out.
Be sure to put a rag, carpet, something soft on top of the blocks so you don't scratch up the boat. I never trust the cement blocks, but a lots of people use them. For just lifting the boat up to slip the bunks out, Car jack stands will work fine, if you have some that are tall enough. If not, you can sit the car jack Stand on top of some stable blocks of wood. Again, put some padding on the stand so as not to scratch up the boat. I've replaced a single bunk with two floor jacks. One under the keel, and one on the back corners. I suppose you could do this as well if you do one at a time. BKH |
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Livin' the Dream
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mcbean7
Groupie Joined: April-30-2008 Location: United States Status: Offline Points: 64 |
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bk-I think I like the floor jack idea better. I don't know if I can trusts cement blocks. I will replace one side at a time.
You guys are awesome...thank you so much! |
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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John and Brian, I have never had a problem with cement blocks. Way back when working at the marina we had lots of boats without trailers. I've set hundreds of boats on them. They do hold up houses too!! I also remember seeing a program on how them are made. The concrete is a extremely dry mix that is pressed in a 100 ton hydraulic press. Anyone who has had a problem with them probably used them sitting in the wrong position with the cores horizontal rather than vertical.
Who's our member that works for a pre cast concrete manufacturer?? I can't remember who it is but he may have something it add. I was going to mention that it is possible to change the bucks without pulling the trailer out but feel it's easier to pull it out. More clearance for things like drilling holes in the bunks. |
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BuffaloBFN
Grand Poobah Joined: June-24-2007 Location: Gainesville,GA Status: Offline Points: 6094 |
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John, what boat are we talking about? The bunks on my BFN would be easy to change 1 at a time with the trailer under it. My '79 SN was a different story. On those boats like that with the bend in the rail, I'd say you're asking for a long day without the boat out of the way. I had the boat out of the way when I changed the bunks for the '79, and it was still a PITA.
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bkhallpass
Grand Poobah Joined: March-29-2005 Location: United States Status: Offline Points: 4723 |
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Agreed Pete. I've seen many many boats on cement blocks. Yet, I have a hard time trusting something that I can put my foot through. Just a personal phobia I guess.
Buffalo, I almost mentioned that if you have a wishbone trailer where you have to bend the bunk boards, then you may need to pull the trailer all the way out. If you just have straight 2X6 bunks, then no need. BKH |
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mcbean7
Groupie Joined: April-30-2008 Location: United States Status: Offline Points: 64 |
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I have an 88 Ski Centurion. I don't remember the manufacturer of the trailer. |
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bkhallpass
Grand Poobah Joined: March-29-2005 Location: United States Status: Offline Points: 4723 |
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Typically Centurion uses 2x6 bunk boards. You should be able to slide them out if you lift the boat about 3 inches above the trailer. BKH
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Livin' the Dream
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mcbean7
Groupie Joined: April-30-2008 Location: United States Status: Offline Points: 64 |
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Brian-yes you are right. The bunk boards are 2X6's and are 11 feet long. It is attached with screws from the bottom up. I think I can leave trailer in place and just slide these right out.
OK Pete, I will give the cement blocks a try. One question...if I'm using 8"X8"X16" blocks, should I have the blocks sitting 16" high (so that I can stick my arms through the holes) or 8" high (so the floor closes up one side of the block)? I hope this question makes sense. lol In other words...what is the right direction to place them? You lost me with "the cores horizontal vs. vertical". |
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tullfooter
Grand Poobah Joined: March-02-2007 Location: White Lake, MI Status: Offline Points: 2225 |
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mcbean
The concrete blocks are strongest with the holes facing up and down, like they are stacked to build a house. Just make sure to use good blocks. I've seen old blocks that can crumble in your hands. If you were closer, you could use my system; Steve |
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Play hard, life's not a trial run.
'85 BFN '90 BFN White Lake, Michigan |
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mcbean7
Groupie Joined: April-30-2008 Location: United States Status: Offline Points: 64 |
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Steve-thank you for the clarification. That makes sense now. By the way...nice lift. That's what I need!
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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John, Steve (tullfooter) was the pre cast concrete guy I referred to!! Yup, stack them just like building a house.
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mcbean7
Groupie Joined: April-30-2008 Location: United States Status: Offline Points: 64 |
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Sweet. Thx Pete. I'll give the concrete block method a go since I have some laying around.
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