[T3] Generator Pulleys
Jim Adney
jadney at vwtype3.org
Tue May 1 08:31:38 PDT 2012
On 1 May 2012 at 7:50, Bryon Garvin wrote:
> can you explain what this situation is about?
>
> "the VR fails and puts shock stresses on the belt"
The pulley is in 2 halves that don't have a bottom to the V-groove.
When the VRs finally completely fail, one set of contacts in them
tends to weld and then break. This leads to the clicking sound coming
from the VR. When this is happening, the load (drag) the generator
applies to the shaft and pulley has large pulses, which snaps the
belt tight and wedges it down into the kerf of the pulley.
The eventual result of this series of "wedgies" is to fatigue one of
the pulley halves until it fractures.
The moral to this story is, "Replace your VR immediately, if it
starts to click."
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Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
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