Not sure if this is the problem the OP is having, but on the 14" Laguna's I've assembled, there is not enough travel in the motor mount and you need to remove the motor and angle it to get the belt off (the motor comes unmounted, so it's the reverse procedure to get it in). Even on the slackest setting, the belt is too tight IMHO, so that will give you an idea of how messed up it is. The first one I assembled, I was thinking "Hey, they made a little boo boo...I'm sure it will get fixed". By the 3rd one, over the course of a year, it became obvious that there was no intention whatsoever to fix it.
To do it is really a 2 person job, it's inconvenient and is a major design flaw IMHO. I just recommend to most people to replace it with a links belt.
Most of the time, you can get a tight v belt onto the edge of the pulley and run it back on by turning the wheel, like putting the chain back on your bicycle when you were a kid.
Can be hard on fingers though, if you screw up.
Replaced the belts, 3 of them, on my lathe like this. Just walked them from one groove to the next. But I had a fair amount of run between pulleys to help out.
A 3/8" belt on a 5hp motor? Seems awfully small.
Really? Would you like to restate that?
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Never, under any circumstances, consume a laxative and sleeping pill, on the same night
"A hen is only an egg's way of making another egg".
– Samuel Butler
So disappointed. Saw the title of the thread and thought we would be discussing pirates...oh well