Eppendorf 5000 Digital Tier Shake - Manual (Page 30)

30
New Brunswick Operating Manual
5.6 Motor Assembly Replacement
Should a new motor become necessary, the Service Engineer will:
1. Set the power switch to
OFF position and disconnect the power cord.
2. Remove the drive belt.
3. Disconnect the motor power cord from the motor.
4. Remove the four bolts that hold the motor plate to the base.
5. Remove the motor from the unit.
6. Remove the motor pulley.
7. Remove the four bolts that hold the motor to the motor plate.
8. Replace the motor on the plate.
9. Replace the motor pulley.
10. Replace the motor, following the steps in reverse order.
11. Line up the belt and check for a ½-inch drop in the belt.
5.7 Upper Shaft Assembly Removal
1. Set the power switch to OFF position and disconnect the power cord.
2. Remove all platforms from the unit.
3. Remove counterweight guard.
4. Remove counterweight.
5. Remove upper bearing (see Figure 10 on the following page).
6. Remove the four main shaft bolts.
7. Remove the four upper shaft bolts.
8. Remove upper shaft assembly (see Figure 11).
9. Replace assemblies in the reverse order.
10. Replace upper shaft assembly, making sure the location pin from the lower main
housing is engaged.
11. Replace the main shaft bolts and tighten the bolts.
12. Install the upper shaft bolts, hand tight.
13. Install the upper bearing (see Figure 10).
14. Reinstall the counterweight. Make sure the counterweight key is in place.
15. Reinstall the counterweight cover.
16. Turn the unit by hand to make sure the counterweight clears the counterweight
guard.
17. If the counterweight clears the guard, plug the unit in, turn the power ON , and set
the speed to 25 rpm. If the unit runs smoothly, turn the power OFF and tighten the
upper shaft bolts and the upper bearing bolts.
18. Reinstall the platforms.
19. Turn the power
ON again, set the speed to 100 rpm. If the unit runs smoothly,
check it again at 250 rpm. If the unit runs well, stop it, turn the power OFF .