Posted by Fargo Rousseau (fargo_r@…>)
We frequently had alternator belt tension problems on our lovely Yanmar. Wore out two Yanmar factory belts in less than 100 hours from under-tension…the result of being overly cautious re: Alternator bearings. Sign that you are in trouble is black dust around and under the alternator (the dust is from wear particles from the belt). Rick, who took over our F30, had just the right tool to correct the problem…and it costs less than $15. Here is one from J C Whitney (below). Hightly recommended. Of course this tool can help you over-tension the belt…so judgement is required. The 1/2 inch rule is a little iffy. How much push is the right amount to test for the 1/2 inch?? The tensioner below will help you dial in the tension…and reliably establish the correct tension. FargoEx F30 #12http://www.jcwhitney.com/INSTANT-FAN-BELT-TIGHTENER/GP_2004220_N_111+10714+600017956_10614.jcwFargo— On Sat, 8/9/08, Al Lorman <ajl@…> wrote:From: Al Lorman <ajl@…>Subject: RE: [FreedomOwnersGroup] slipping V-beltsTo: FreedomOwnersGroup@yahoogroups.comDate: Saturday, August 9, 2008, 1:53 PM
Belts
can also slip become they become glazed. Just had a $53 belt replaced on my
car for that reason. Looked fine, tension fine, but the underside, the part
that contacts the pulleys, was slick. Al
Lorman
From:
FreedomOwnersGroup@ yahoogroups. com [mailto:FreedomOwne rsGroup@yahoogro ups.com] On
Behalf Of ron barr
Sent: Saturday, August 09, 2008 1:48 PM
To: FreedomOwnersGroup@ yahoogroups. com
Subject: [FreedomOwnersGroup ] slipping V-belts
Interesting
info. Does anyone know the correct belt tension for the Yanmar on an F32? I
recall from my past experience with other motors that the depression should be
about ½”+ Ron
Hoyt
F32 Newport
RI
Ah yes I have a couple of those Al – going to have to
dig them out. They make it easy to adjust but unfortunately they don’t
tell you how much to adjust!
Posted by Herman and Gail Schiller (hschiller2@…>)
I’ve used Permatex “Belt Dressing” to get rid a
the noise some belts make, when they’re slipping
(?). I don’t know if it successfully “fixes” a glazed belt. Herm
At 12:52 PM 8/10/2008, you wrote:
Ah yes I have a couple of those Al – going to
have to dig them out. They make it easy to
adjust but unfortunately they don’t tell you how much to adjust!
Ah yes I have a couple of those Al – going to have to
dig them out. They make it easy to adjust but unfortunately they don’t
tell you how much to adjust!
Posted by Bob (rweeks6508@…>)
I find it simpler with a longer/beefer flat screwdriver wenched in the bracket of the alternator and apply pressure against the alternator with one hand and tighten with the other. Measuring is rather simple and takes some experience and experimenting since there are several variables and 1/2" is not the absolute setting. The shape of the pulley itself has some bearing on how tight also. A shiney nice slick inside track of the pulley will also cause some slipage. I can remember on one of my old cars I had to replace the pulley due to the mirror finish from years of use. Anyway a straight line from center of each pulley and measure from that line to the bottom of the belt, push down a 1/2 inch, tighten and test. As others have already said black stuff too tight, seeing the belt wobble too loose. Bob On Sun, Aug 10, 2008 at 12:52 PM, ron barr wrote: Ah yes I have a couple of those Al – going to have to dig them out. They make it easy to adjust but unfortunately they don’t tell you how much to adjust! Ron Hoyt F32 Newport RI