MEC 5000, 6500 & 8000/P | 29www.natvac.com | 800.253.5500
5. Count the number of gaskets.
6. Clean the rotor, rotor slots and housing and inspect
for wear or damage.
If the housing needs to be bored or honed, remove
only as much material as is necessary to give a
smooth clean bore.
The maximum over bore we recommend is .060
inch. (A new housing has a bore of 7.095 inches.)
If you bore or hone the housing, remove the four
way valve assembly and internal check valve ball
prior to machining.
7. Inspect vanes, bearings and
seals and replace as necessary.
Anewvaneisushwiththeoutside
diameter of the rotor.
If they are worn more than 1/4”
they should be replaced.
We recommend replacing vanes in
sets.
If the ends of the vanes are chipped or delaminated
they should be replaced.
The seals should be soft and pliable.
The bearing should turn smoothly.
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