Owning two tractors with Donaldson air cleaners, both with seemingly factory installed, well adhered fiber gaskets, it is impossible to believe no gasket was ever produced or installed even though the parts manuals clearly indicate no gasket or seal should be present.
Too many tractors have these gaskets to assume they were field installations by previous owners, especially since they fit perfectly.
I have a theory this fiber like substance may have been a spray coating applied to the lip of the filter can at the time of manufacture, therefore not otherwise indicated in parts breakdowns.
Edit for spelling error...
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Last edited by lazyuniondriver on Fri Nov 09, 2012 9:29 am, edited 1 time in total.
"HAVE ALL YOUR DELIVERIES MADE BY UNION DRIVERS"