CAMCORP Blower Package with Sutorbilt Blower - Manual (Page 43)

SB-7-621 Page 30
CLEARANCES FOR STANDARD UNITS ONLY
2M 2L 3H 3M 3L 4H 4M 4L 5H 5M 5L
TOTAL END CLEARANCE .006-.009 0.007-0.011 0.007-0.011 0.007-0.011
IMPELLER TO GEAR HEADPLATE .003-.004 0.003-0.005 0.003-0.005 0.003-0.005
IMPELLER TIMING (A-A) (C-C) .005-.008 0.005-0.007 .006-.008 0.006-0.008 .007-.010 .007-.010 .008-.010
TIP TO CASE CLEARANCE (B-B) 0.002 min. 0.002 min. 0.002 min. 0.002 min.
FIGURE 7-4
The bearing driver will position the mating ring (B) to the correct depth with respect to the mechanical seal (A).
7. Apply a light oil to the drive headplate bearing bore, bearing inside diameter, and shaft seat. Install the drive
end bearings (14) as far as possible without force.
8. Attach the puller plate shown on page 23 to the drive headplate using the tapped holes used to secure the
drive cover (see FIGURE 7-3, page 29). Tighten the bolts so that the advance of the bearings stay as
uniform as possible. Bearings should be pressed until flush with the drive headplate.
9. Lubricate the gear end bearing fits with a light oil as described previously. Install gear end bearings (14) as
far as possible without force. Use the plate, used to install the drive end bearings, to press the bearings on
the shafts as described in Step 8. Press bearings into the gear headplate until completely seated in the
bearing bore.
NOTICE
Bearings will not be flush with gear headplate bores when completely seated.
10. Impellers should now be checked for free axial movement by hitting the ends of the impeller shafts with the
palm of your hand.
11. Push the impellers against the gear headplate and recheck the total end clearance between the drive
headplate and the impellers (see FIGURE 7-4).
A. If total end clearance is insufficient, loosen impeller case to headplate bolts on either headplate, and
move the headplate away from the case far enough to insert a paper shim in the amount equal to the
insufficient clearance. Retighten case bolts and again check the total end clearance. Refer to
FIGURE 7-4 for correct clearance.
B. Excessive end clearances normally will require new impeller assemblies, but in some circumstances the
impeller case can be removed and reduced in width by machining off the amount of excess clearance.