Goodyear part number needed for Alternator Belts

[Tenor]

I need new alternator belts for my MCI 7, and I'd like to get them locally.  The MCI number is 8F-27-3.  Does anyone have the Good year numbers?  Thanks!

Glenn

[edroelle]

Glenn,

These are the numbers that I have.

Good Year 15430 Matched Set 11AV1080.

The last price I had was years ago from Mohawk at $37.

Look to see that all belts sit at the same height in the pulleys.  Otherwise, one may be under more load and have more of a tendancy to break.  When one goes, it usually takes out others.

Ed Roelle
Flint, MI

[Tenor]

Thanks Ed! 
The belts that were originally on the bus were dry rotted and failed in December while I had the bus out for spray foam insulation.  I thought I found a complete torn belt to use as a size gauge.  Well, we finally found 4 belts from 3 different places to make sure I got home.  Of course, they were too short so we used some angle stock to move the alternator in closer.  They held for about 400 miles. 

[jjrbus]

In a pinch you buy what you can get.  Otherwise you want a matched set.  Belts are made in long tubes and individual belts are cut from tube. Numbers are stamped on belt indicating position in tube. With a little looking you can find position number on belt, you should have 3 consecutive numbers.
Other than the chain places, the parts people should be able to cross reference any belt numbers or call somebody who can. 
I carry an extra set for the alternator and one for the blowers.   What seems to happen on the alternator is one belt snaps and goes under another, which brakes that belt, that one goes under the third belt, which is already overstressed.  Whenever possible replace all three belts.  I carry the extra blower belt, just because they have to be ordered and are a day away!   Only my amature opinion, not to confused with  perfesional advice!  Jim

[Tenor]

Just a follow up on this topic:
Either we had the number wrong, or it has changed.  The belt is 8R-27-3.  Luke has them still and can order more.

[buswarrior]

That was a long way 'round!!

A long straight edge that touches the back/furthest part of both pullies gives a busnut the best chance at getting them lined up. They throw off by themselves when the pullies are out of line.

The various angles in there make it tricky to eye ball whether it's all straight.

Loosening off the mount and letting the belts true it is another tactic, wear your safety glasses...

Happy coaching!
Buswarrior

[chessie4905]

Once you know the length and width,etc this is a good place to get belts:
https://www.vbelts4less.com/?gclid=EAIaIQobChMI_P7Oy4Km4wIV4P_jBx3rMw7_EAAYASAAEgLomPD_BwE