SB--7--627 Page 20
FIGURE 15 -- BEARING CARTRIDGE REMOVAL
FIGURE 16 -- MECHANICAL SEAL INSTALLATION
B
A
D
C
hub. Refer to FIGURE 13, page 17, for torque
requirements.
6.
Check the gear end clearance.
7.
Replace the gear case.
Follow Blower Startup Checklist on
page 12 after every shutdown.
BEARING AND SEAL REPLACEMENT
Gear End
1.
Remove the gear case.
Refer to “Gear
Inspection,” page 15.
2.
Check the fixed gear end impeller clearance. This
clearance must be duplicated when repairs are
completed.
3.
Remove the locknuts and washers from the ends
of both shafts and match--mark the shafts, gears,
hubs and bearing cartridges to assure reposition-
ing during reassembly.
4.
Remove gears and hubs using the procedure
outlined in “Timing Gear and Hub Removal,” page
19.
Refer to FIGURE 15. Shim spacers (A) added
during production will now be exposed behind the
bearing cartridge (B) on the gear end of the unit.
The spacers were installed to assure accurate
positioning of the impellers between the
headplates; hence, it is important that they be
returned to their exact positions on reassembly.
The number of spacers fastened
behind each bearing cartridge varies.
It is essential that each set of spacers
be identified with its respective
position during withdrawal.
To remove spacers:
1.
Loosen, but do not remove, the bearing cartridge
attachment bolts (C) (FIGURE 15).
2.
Insert the jack screws (D) and back out the
bearing cartridge until the shim spacers are loose.
