Specifications

Document No. DER05026
Effective Date 28 Mar 08
Supersedes
30 Aug 07
Page No. 1 of 3
ROTATING ASSEMBLY REMOVAL AND INSTALLATION
DE-7200 CENTRIFUGE
GENERAL
This procedure describes removal and installation of the rotating assembly. Removal may be
required to clean out, inspect, or perform maintenance on the rotating assembly. Excessive noise
or vibration during centrifuge operation may indicate defective main or conveyor bearings. If such
conditions are evident, the bearings should be inspected for looseness and replaced if necessary
(refer to
DER05024 and DER05025).
Note! All attaching hardware must be correctly tightened. Refer to the torque
chart in
DER05029 for hardware tightening requirements.
REMOVAL
The rotating assembly must be removed for thorough cleaning, bearing replacement, or to
perform inspection and maintenance. To remove the rotating assembly, proceed as follows:
WARNING! TO AVOID SERIOUS PERSONAL INJURY BE SURE EQUIPMENT
IS LOCKED OUT, TAGGED OUT, DE-ENERGIZED, AND HAS STOPPED
ROTATING BEFORE PERFORMING MAINTENANCE AND/OR ADJUSTMENTS.
1. Turn off feed, and shut down, lock out, and tag out electric power to the centrifuge. Allow
rotating assembly to coast to a full stop.
2. Disconnect feed pipe from feed component flange.
3. Remove screws securing belt guard to case, and lift and remove guard.
4. Remove screws securing case cover to case, and open case cover.
5. Loosen four screws securing flexible coupling half to shaft of conveyor drive motor, and slide
coupling half toward motor until end of motor shaft is visible.
6. Loosen nuts securing bowl drive motor to base, turn tensioning bolt to release tension, and
remove belts from bowl sheave.
7. Remove bolts, lockwashers, and flat washers securing pillow blocks to base at liquid and solid
ends (Figure 5026-1) and remove alignment pins from pillow blocks.
8. Select a suitable hoist capable of lifting at least 4000 lbs (1800 kg) to rotating assembly, and
lift rotating assembly until clear of base.