Specifications

Document No. DER05017 BEARING REPLACEMENT
Page 10 of 12 Effective Date 25 May 07
Solids End Pillow Block Bearing (Cont’d)
14. Apply a light coat of grease to surface of bowl shaft where sheave mounts.
15. Heat sheave to 200°F. While handling with insulated gloves, orient notch in sheave with key
on solid bowl head shaft and install sheave on shaft. Secure sheave with screws.
16. Slide inboard and outboard pillow block flingers close to pillow block covers, leaving about
1/16-in. clearance, and tighten set screws on both flingers.
17. Install flinger covers, and secure screws.
18. Operate hoist to lower rotating assembly into centrifuge until pillow blocks contact base.
19. Insert alignment pins into pillow block alignment holes, and insert bolts. Remove alignment
pins, and tighten pillow block bolts in accordance with
DER05018.
CONVEYOR BEARINGS
This procedure requires removal of the conveyor assembly from the bowl assembly. Conveyor
bearing replacement must be performed in a clean environment by trained, qualified personnel.
If the conveyor bearings are found to be defective, it is likely that the conveyor will require
complete overhaul. Consequently, all parts should be carefully inspected, and fits and clearances
should be measured in accordance with drawing 15082-00 in Section 11 to determine their
suitability for re-use.
Removal
The liquid end contains two thrust bearings, and a single ball bearing is installed at the solid end
of the conveyor. Replace all conveyor bearings as a set if excessive vibration, end play, or radial
looseness if found. The following procedure describes removal of the liquid end bearing and then
the solid end bearing. To remove the conveyor bearings, proceed as follows:
1. Remove conveyor from rotating assembly in accordance with Preventive Maintenance,
DER05022.
2. With conveyor supported, remove screws securing lifting bracket to conveyor and remove
lifting bracket.
3. Remove liquid end thrust bearings as follows:
1. Remove screws securing liquid end seal housing (Figure 5017-4) to bearing housing, and
remove seal housing. Remove and discard O-rings installed in external grooves of seal
housing.
2. Using a suitable hammer-type puller, extract both thrust bearings from liquid end bearing
housing. Discard bearings.
3. Remove retaining ring securing seal in seal housing, and remove and discard seal.
4. Remove solids end bearing as follows:
a. Remove screws securing seal housing and bearing housing (Figure 5017-5) to conveyor,
and remove seal housing and bearing housing. Separate seal housing from bearing
housing.