37-1-614 Page 47
FIGURE 7-17 – BEARING PRESS PLATE
FIGURE 7-18 – BEARING CLAMP PLATES
FIGURE 7-19 – DISCHARGE END CLEARANCE
CHECK
FIGURE 7-20 – OIL SLINGER
19. Check the discharge end clearance of the rotor with a feeler gauge through the discharge
opening, (FIGURE 7-19, page 47). Also check rotor end clearance at the inlet end through the
inlet opening. Clearance should match those listed in the chart, (FIGURE 7-8, page 43), keeping
in mind the allowable tolerance and possible .002” variation in rotor lengths. Never allow rotors to
run closer than allowable tolerance. Wider clearance will not result in blower failure but may
affect efficiency. If the discharge end clearance is too great, make sure the bearing retainer plate
is tight, holding the bearing solidly in the bore, and the bearing retainer nuts are tight, which
clamp shims and bearing spacer solid against the end of the rotor, Step 18. If clearance is too
close, remove the discharge end carrier and repeat the steps to establish shaft shim sets and
total clearance.
20. Bend the ear of the lock washer (35, 36) into the slot of the nuts (33, 34) on the main rotor shaft
extension. Oil the bearing generously. Install the oil slinger (6) with three (3) “Nylok” type screws
(45) – oil slinger to fit the shaft with the reinforcing plate up (FIGURE 7-20).
