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37- 1- 613 Page 42
FIGURE 7- 5 –
ANGULAR CONTACT BEARING ASSEMBLY
FIGURE 7- 6
marks are stamped on the O.D. of the rotors on
the same lobe as the timing marks.
If rotors are installed in reverse of
above instructions, the gate rotor
bearing spacer O.D. will drag on the
main rotor lobe and be damaged.
The CycloBlower is designed for no metal-to-
metal contact
with parts within the housing. To
achieve this, some preliminary measurements are
necessary before completing the assembly.
The first
set of measurements are used to determine the
shaft shim set (19) thickness necessary for posi-
tioning the rotors in the housing to give the
required clearance between the end of the rotors
and the carrier face at the discharge end.
End clear-
ance is maintained at the discharge end by two angular
contact bearings (24), bearing spacer (14) and shim set
(19). The shaft shim set is determined as outlined in
Steps 5 thru 8.
5.
The angular contact bearings (24) must be
assembled as shown in FIGURE 7-
7
to assure
a
“fixed” bearing. The marked face of the inner
bearing is placed down in the bearing bore; the
marked face of the outer bearing is placed up.
6.
Install the shaft seal (15), and fit the bearing
spacers (14) in the discharge end bearing carrier
(4) using the same method as outlined in Steps 1
and 2, page 32. To prepare for shim set measure-
ment, slip bearings (24) into the bore and install
bearing retainer plate (10), Figure 7-6.
Bearings
must be assembled as directed in Step 7.
Bearings are slip fit in the bore.
7.
Inspect bearing spacers for burrs on either end
and polished area of O.D. Slip bearing spacer
through the shaft seal with the polished end
toward the bearing. Make sure the spacer is
resting solidly against the bearing. With depth
micrometer, measure the distance from the face
of the carrier to the end of each of the bearing
spacers, FIGURE 7-
7
.
BEARING SPACER
DISCHARGE CAVITY
FIGURE 7- 7