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BELT DUST

Aug 11, 2011
648
O'day 30 MD
You should always use a grip notched belt especially when doing around a small pulley such as an alternator.
A notched belt has grooves or notches that run perpendicular to the belt's length, which reduces the bending resistance of the belt. Notched belts can use the same pulleys as cross-section standard V-belts. They run cooler, last longer, and are about 2% more efficient than standard V-belts.
I have three brands of back up belts, Napa Premium, Dayco Top Cog and Advance 15430. The Napa Premium is notched on the inside, the other two on the outside. Which is better?
 
Mar 20, 2016
483
Beneteau 351 WYC Whitby
I have three brands of back up belts, Napa Premium, Dayco Top Cog and Advance 15430. The Napa Premium is notched on the inside, the other two on the outside. Which is better?
The Napa premium notched on the inside. The notches allow the belt to go around a small pulley without compressing the belt allowing reduced heat ,dust and longer life
 
May 23, 2016
214
O'Day 1984 23 Island Park, NY
I find this intriguing... can someone more intelligent than me suggest a safer way to achieve this without removing pulleys?
 
Jan 7, 2011
2,777
Oday 322 East Chicago, IN
I did mine that way…carefully holding some sandpaper folded to clean up t he pulleys. OSHA would certainly want a guard or something ;-)


You can certainly do it with the engine off, sand down a little area, rotate the pulley, sand a little more, rotate the pulley, and so on…tedious .

Running the engine and sanding them down is certainly faster…but as my dad used to say, “ Haste makes waste“, or in this case, maybe missing fingers.

Greg
 
Feb 6, 1998
11,436
Canadian Sailcraft 36T Casco Bay, ME
Awhhhh Gee. A professional trick... "Why didn't I think of that.... ?"
Perhaps because you didn't read the link previously posted in this thread...? ;)

 
  • Ha
Likes: jssailem
Sep 23, 2009
1,450
O'Day 34-At Last Rock Hall, Md
While the belt is off, has anyone checked their crankshaft pulley for axial play? My m 25xpb defintely has some you can feel pulling on it. Our marina mechanic says it is within tolerance but I think it has to affect pulley alignment.
 
Feb 6, 1998
11,436
Canadian Sailcraft 36T Casco Bay, ME
After a six hour trip which ended up taking eight, there is only a very fine dusting. This is after correcting the The dust is also much much finer. I'm getting closer. (Mine used to look like Main Sail's picture)
I get the method in the picture with the drill brush and yes it is much safer. How ever when you do it my method, WHICH I HAVE SAID DO NOT DO, the abrasion is a lot smoother as it works like a lathe. If using the method in the picture and turn it a smidgeon at a time to use the drill wire brush, flat spots will happen and in a random pattern.
The drill is always moving around the crank pulley and is not just staying gin one place...
 
Oct 29, 2016
1,748
Hunter 41 DS Port Huron
Rid yourself of belt dust completely and improve alternator efficiency, convert to a serpentine belt and pulleys, dust gone.....
 
Jan 27, 2008
2,994
ODay 35 Beaufort, NC
I find this thread very disturbing starting with post #18 and suggest the moderators remove it from that position. Having been associated with factories and machine shops my entire career the suggestion to put your fingers into rotating machinery is totally unacceptable. This violates OSHA regulations and is a severe hazard. I've seen my share of injuries and fatalities for Darwin Award recipients through the years. We should be promoting safe practices on this site, not one of the most egregious violations of safety protocols possible. MaineSail has considered the risks involved and developed a process that acceptably minimizes risk. I suggest we all heed his advice.
 
Sep 20, 2014
1,273
Rob Legg RL24 Chain O'Lakes
... If using the method in the picture and turn it a smidgeon at a time to use the drill wire brush, flat spots will happen and in a random pattern.
The brush should cause the pulley to spin. If not, it would be easy enough to put a 3/8 drive socket adaptor in your drill and use the drill on the nut that holds the pulley in place. I'd probably use two drills, one to spin the pulley, and the other to run the wire brush or flap wheel. For the crank pulley, just run the engine without the belts. under no load at idle, you'll have plenty of time to run it before it overheats.
 
Jul 5, 2011
584
Oday 28 Madison, CT
I find this thread very disturbing starting with post #18 and suggest the moderators remove it from that position. Having been associated with factories and machine shops my entire career the suggestion to put your fingers into rotating machinery is totally unacceptable. This violates OSHA regulations and is a severe hazard. I've seen my share of injuries and fatalities for Darwin Award recipients through the years. We should be promoting safe practices on this site, not one of the most egregious violations of safety protocols possible. MaineSail has considered the risks involved and developed a process that acceptably minimizes risk. I suggest we all heed his advice.
I could not agree more. In the mid 70's I took my Porsche 911 to a dealer in Frankfurt (Germany). The engine was running a little rich as I recall. The service advisor came out and bent over the engine. He had a tie on and he damn near got choked to death as I saw the tie catch (but only briefly) the moving belt. The engine was "only" idling but the torque from 175 HP could have strangled him. Her was very, very lucky.
 
Aug 11, 2011
648
O'day 30 MD
@Jibes 138 Duly noted. I clearly stated DO NOT DO AS I DID. Just for you I will try to remove my posts on this matter.
I ask all those that posted with quote attachments, please do like wise.