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  #1  
Old 03-24-2010
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Need to tighten the alternator belt

Is there a tool to keep the alternator belt at the proper tension while you tighten up the bolts ? thanks,

V49
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Old 03-24-2010
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Originally Posted by velero View Post
Is there a tool to keep the alternator belt at the proper tension while you tighten up the bolts ? thanks,

V49
Big screwdriver?

Seriously, I normally just use a screwdriver or small pry bar wrapped in a rag. Generally, you only have to tighten the one adjustment bolt to get it to hold fast. Then you can let go and tighten the pivot bolt.
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Old 03-24-2010
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That's the way I do it too... no need for anything fancy.
Quote:
Originally Posted by JohnRPollard View Post
Big screwdriver?

Seriously, I normally just use a screwdriver or small pry bar wrapped in a rag. Generally, you only have to tighten the one adjustment bolt to get it to hold fast. Then you can let go and tighten the pivot bolt.
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Old 03-24-2010
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Thanks John, I need the tool asisst because of a tight engine room and the size of the alternator/belt. V49
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Originally Posted by velero View Post
Thanks John, I need the tool asisst because of a tight engine room and the size of the alternator/belt. V49
Okay, I'll be interested to hear if such a thing exists. Haven't heard of a tool like that, but then I've never needed it.

Maybe Maine Sail has a suggestion?

Now that I'm pondering this a bit, maybe the answer isn't a tool but a different bracket. I have a fuzzy memory of having seen somewhere a "ratcheting" adjustment bracket. Instead of being a smooth arc where the adjustment bolt grabbed only by compression, it was finely notched or geared, and the bolt had cogs that would walk up the bracket to increase tension.
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Old 03-24-2010
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I'm trying to make a belt tensioning tool out of a turnbuckle. Prelim test shows it'll work. Just put the turnbuckle between the crankshaft pulley and the alternator and turn to expand the turnbuckle, it'll push the two pulleys apart. The trick is fabricating both ends of the turnbuckle so that it won't slip off either pulleys. Good luck.
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This is what you want. Took a course at Mack Boring on Yanmars and this was recommended. It works great!

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The belt tensioner suggested above is great but only for certain engines. My 4JH Yanmar requires something around 17 inches spacing and this item only extends to 15 inches necessitating use of another spacer making the whole concept too impractical compared with the screwdriver/pry bar technique.
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Yes thats what I was looking for thanks. V49
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Old 03-24-2010
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A mate?
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