Alternator Belt Tension
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Boat Maintenance
Forum Discription: Discuss maintenance of your Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=9486
Printed Date: November-15-2024 at 9:51pm
Topic: Alternator Belt Tension
Posted By: east tx skier
Subject: Alternator Belt Tension
Date Posted: January-26-2008 at 3:19pm
I've searched this topic in preparation for my first belt swap and don't recall seeing anything that prepared me for this.
I loosened the belt tensioner and was able to get the old belt off with not too much trouble. The original tension was about half way up the slot on the bracket (shade tree here, so please forgive my lack of correct terminology).
The new belt is the same PCM part number (66001) the old one, but would not go on until I completely removed the alternator from the tensioner bracket. When I reattached the bolt to adjust the tension, I am basically just above the bottom end of the slot. Tension feels about right (0.25"), but the adjustment position is far different than before.
Is this typical with new PCM belts. Will I have to adjust the tension over time? Anything obvious that I have missed?
Thanks.
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http://correctcraftfan.com/diaries/details.asp?ID=2383&sort=&pagenum=7&yrstart=1996&yrend=2000 - 1998 Ski Nautique (Red & Silver Cloud); GT-40; Perfect Pass Stargazer; Acme 422.
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Replies:
Posted By: 8122pbrainard
Date Posted: January-26-2008 at 8:06pm
Doug, All belts will wear and stretch over time requiring tensioning. The key thing is you got it on and the 1/4 play when you press on the belt between pulleys sounds good. The key thing is you do not what to be able to turn the alternator pulley by hand and cause it to slip on the belt. Don't over tighten as this may blown out the alternator bearing. Run it for awhile and then you will need to re tension.
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/diaries/details.asp?ID=1622" rel="nofollow -
54 Atom
/diaries/details.asp?ID=2179" rel="nofollow - 77 Tique
64 X55 Dunphy
Keep it original, Pete
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Posted By: east tx skier
Date Posted: January-26-2008 at 8:59pm
Thanks, Pete. 1/4" is a rough estimate. I suppose I could push it further if I really lean on it, but I suspect that's not the way to take that measurement. When you say don't overtighten, do you mean not too much tension or don't overtighten the bolt on the tension bracket.
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http://correctcraftfan.com/diaries/details.asp?ID=2383&sort=&pagenum=7&yrstart=1996&yrend=2000 - 1998 Ski Nautique (Red & Silver Cloud); GT-40; Perfect Pass Stargazer; Acme 422.
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Posted By: 8122pbrainard
Date Posted: January-26-2008 at 10:02pm
Doug, Sorry I wasn't clear. I was referring to too much belt tension.
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/diaries/details.asp?ID=1622" rel="nofollow -
54 Atom
/diaries/details.asp?ID=2179" rel="nofollow - 77 Tique
64 X55 Dunphy
Keep it original, Pete
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Posted By: LaurelLakeSkier
Date Posted: January-26-2008 at 10:03pm
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It is the tension on the belt you should be concerned about. If it is too tight, it puts a lot of pressure on the bearings of the alternator, water pump or anything the belt goes around. Torquing the bolt down too much could also be bad in that you may strip threads.
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Posted By: LaurelLakeSkier
Date Posted: January-26-2008 at 10:04pm
Posted By: east tx skier
Date Posted: January-26-2008 at 11:47pm
Very good. Thanks. It's definitely tight enough that it's not slipping on the alternator pulley. If I give it a good push, I can probably get it past .25" between pulleys, but not by much.
Thanks for all the advice.
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http://correctcraftfan.com/diaries/details.asp?ID=2383&sort=&pagenum=7&yrstart=1996&yrend=2000 - 1998 Ski Nautique (Red & Silver Cloud); GT-40; Perfect Pass Stargazer; Acme 422.
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