Filter
Top Products
58
D) Set the clearance between the gate rotor blade
and the shelf.
1. Place a piece of 0.003”-0.004” shim stock
between the gate rotor blade and the shelf.
2. Measure the depth from the top of the com-
pressor case to the top of the thrust bearing
housing. This determines the amount of
shims needed for the correct clearance.
3. Use factory installed shim pack (106) and
bearing housing cover (116) without the O-
ring (143). Check the clearance between the
entire gate rotor blade and the shelf, rotate
the gate rotor to nd the tightest spot. It
should be between 0.003”-0.004”. Make
adjustments, if necessary. It is preferable to
shim the gate rotor blade looser rather than
tighter against the shelf.
Note: Replacement blades are precisely the same
dimensionally as blades installed originally at fac-
tory: Therefore, the same amount of shims will be
required for replacement blades.
E) After clearance has been set install a new O-ring
(143) on bearing housing cover, install cover and
tighten the bolts to the recommended torque
value.
F) Install side cover with a new gasket. Tighten the
bolts to the recommended torque value. The
unit can then be evacuated and leak checked as
outlined in section 0.03.
Service