Specifications

Document No. DER05037
Effective Date 28 Mar 08
Supersedes
03 Mar 08
Page No. 1 of 8
GEARBOX REMOVAL AND INSTALLATION
DE-7200 CENTRIFUGE
GENERAL
This procedure describes removal and installation of the gearbox. This procedure must be
performed by properly trained and qualified personnel. To prevent contamination to bearings and
internal components of the centrifuge, this procedure must be performed in a clean environment.
Note! All attaching hardware must be correctly tightened. Refer to
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. Remove screws securing belt guard to base, and lift and remove guard.
3. Remove screws securing case cover to base, and open case cover.
4. Using a water hose, wash off process residue from inside of case and outside of rotating
assembly.
5. Loosen four screws securing flexible coupling half to shaft of conveyor drive motor, slide
coupling half toward motor until end of motor shaft is visible, and remove flexible spider.
6. Disconnect feed pipe from feed component.
7. Loosen nuts securing bowl drive motor mounting plate to centrifuge base, turn tensioning bolt
to release tension, and remove belts from bowl sheave.
8. Remove alignment pins, bolts, lockwashers, and flat washers securing pillow blocks to base at
liquid and solid ends (Figure 5037-1).
9. Remove cover from stainless steel junction box on centrifuge base (Figure 5037-2), and
disconnect solid and liquid end temperature sensor leads from terminal block. Unscrew
coupling nut from elbow at sensor (Figure 5037-3), and pull electrical leads out through
conduit. Coil and secure leads to avoid interference during removal of rotating assembly.
10. Disconnect speed sensor cable from speed sensor.