37-1-614 Page 49
22. Turn the unit end for end, gear end up. With a depth micrometer on a perfectly flat parallel bar
across the bearing bore, measure the distance to the shoulder in the bearing bore, FIGURE 7-22.
23. Remove tape from the shaft holding the bearing spacers in place. Tap the spacer to be sure it is
solidly against the end of the rotor. This is important for the next measurement. With a depth
micrometer on the same parallel bar used in Step 22, measure the distance to the end of the
bearing spacer, (FIGURE 7-23).
24. Slide the protective installation sleeves over each shaft. Install the green outside diameter oil
seal (88) on the gate rotor shaft (FIGURE 7-24) and the red outside diameter oil seal (87) on the
main rotor shaft. The dirt lip and the rotation arrow should be down. Drive the seal flush with the
bottom of the oil channel cast inside the bearing bore. Remove installation sleeves.
25. Slide enough shims over the
main rotor shaft
(largest shaft),
(FIGURE 7-25), up against the
end of the bearing spacer until the reading is .008” to .013” LESS than the reading in Step 22.
This will give .008” to .013” running clearance between the inner race flange and the end of the
bearing rollers.
On
the
gate rotor shaft
(smallest shaft),
the measurement to the spacer should be .020” to
.050” LESS than the measurement to the shoulder. This clearance insures free bearing float
without the use of shims.
26. On the
main rotor
, a cylindrical roller bearing (31) is used. Install the roller assembly of the
bearing in the bore of the carrier (4) with the unnumbered side out. The roller assembly is slip fit
in the bore. Coat the inner race of the bearing and shaft with oil.
Slide the inner race of the
bearing on the shaft with the flange end out.
Assemble the press plate and jack screws as
shown and press the inner race over the shaft solidly against the shims and bearing spacer,
(FIGURE 7- 26, page 50).
FIGURE 7-24 – OIL SEAL ON GATE ROTOR SHAFT ASSEMBLY
