flyrotary@lancaironline.net Mailing List Archive

Paul,
Have you tried squirting a bit of Belt Dressing on them while they're squealing? Opening the hood and Squirting some on them before you start? Anything like that?

Quite often that will overcome the moisture ... Jim S.
Paul wrote:

Yes, and also caused by improper tension, especially the alternator belt. When all the clearance and marker lights are turned on (both tractor and trailer), it puts a heavy load on the alternator, and if the belt is not tensioned properly, causes it to slip. It is very humid here in Mobile, AL. In the mornings when we first start the trucks, many of the alternator belts will squeal until the batteries are brought up to full charge, and the belts dry off (overnight moisture). Then the squealing stops. Then they are fine, but while they are slipping due to moisture and heavy alternator drain, they are also wearing. If you tighten them so much that they do not squeal when wet and batteries are not fully charged, you put too much side tension on the pulley. Can't win. Just replace the belts more often. Paul Conner

----- Original Message -----

From: Kelly Troyer

To: Rotary motors in aircraft

Sent: Saturday, February 26, 2005 1:55 PM

Subject: [FlyRotary] Belt failure Rate

Paul and all,

My girlfriend's brothers have over the road trucks and do their own maintenance. They

tell me that most of their belt problems are caused by poor pulley alignment (Even on new

Trucks from the factory)........FWIW

--
Kelly Troyer
Dyke Delta/13B/RD1C/EC2

> Paul wrote:
>
> > Hi, Todd....I have had to replace the serpentine belt on my Ford motor
> > home. (Broke on the highway on the way to a canard fly-in of course).
> > All of our tractor-trailer units have serpentine belts. Fairly high
> > failure rate. I always keep at least 12 different serpentine belts (2
> > of each size) in my repair truck so that I can fix them on the
> > roadside. We use Gates and/or Goodyear. In fairness, however, a few
> > of the older units have a V belt for the alternator. They fail as
> > well. Don't know which type of belt fails more frequently, but they
> > both fail with regularity. Now if we changed them at every annual
> > condition inspection, however..... Paul Conner

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