A recent vacuum pump failure had me shopping for a new vacuum pump when my A&P told me that 90% of pump failures are due to a $19 sheared pump coupler you can order in Aircraft Spruce. That and a $3 gasket can save you hundreds of $$.
If your pump fails, ask your A&P. Hope this helps someone.
07-03568 TEMPEST VACUUM PUMP SHEAR COUPLING 082-00067
08-00297 TCM VACUUM PUMP GASKET 653487
If your pump fails, ask your A&P. Hope this helps someone.
07-03568 TEMPEST VACUUM PUMP SHEAR COUPLING 082-00067
08-00297 TCM VACUUM PUMP GASKET 653487