National Vacuum Equipment 607 challenger series Replacement And Rebuild Manual page 8

8 | 607 Challenger Series
8� Inspect the original vanes for
any delamination, chipping or
other damage�
If any of the vanes are worn
more than 1/4", are chipped
or delaminated they should be
replaced�
We highly recommend replac-
ing vanes in sets� Apply a liberal
amount of lubricant to the vanes
before installing in the rotor
slots�
It is always a good idea to have
a spare set of replacement
vanes on hand to reduce pump
downtime�
9� Install one (1) new endplate
gasket between the housing and
the endplate, do not use any
gasket sealer.
Carefully guide the endplate
onto the rotor and threaded
dowel pins
(Fan Cooled Only) Reinstall the
eleven (11) self-tapping screws
and holding the fan shroud to the
rear end-plate� Fasten the upper
fan shroud tin to the fan shroud
support on the rear endplate�
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