Belt Replacement - Masterflex Digi-Staltic L/S 77310-00 Manual De Operación

5. Remove the spare fuse and slide it into the fuseholder in place of the defective fuse.
NOTE: Replace the spare fuse as soon as is practical.
6. Push the fuse tray in until it snaps into place.
7. Make sure that the voltage selection switch matches the AC power source.
8. Reconnect the power cord to the connector on the back of the pump drive.
9. Plug the power cord into the AC source.
10. Place the power switch in the On (I) position.
NOTE: If the fuse blows repeatedly, there is a problem with the pump drive. Contact your distributor or Cole-Parmer
Technical Support for help.

BELT REPLACEMENT

If the dispenser powers up properly and appears to be
operating correctly at the control console, but the pump does
not turn, it is possible that the belt has broken. Use the
following procedure to inspect and, if necessary, replace the
belt.
DANGER: Never remove the cover from the pump drive
when power is present. AC and DC power in
the pump drive can cause serious injury or
death. Ensure that the pump drive is
disconnected from the power source before
removing the cover for maintenance. Allow
ten minutes for the capacitors in the power
supply to discharge before proceeding.
1. Remove and retain the four screws from each side of the
pump drive cover.
2. Remove the cover by sliding it straight up.
NOTE: Inspect the belt to see if it is broken or has missing
teeth. If it is broken or worn, it needs to be replaced.
3. Refer to Figure 14 and loosen, but do not remove, the two nuts that secure the motor to the top of the motor mounting
brackets.
WARNING: Be careful when working near the fan end of the motor. The fan blades are sharp.
NOTE: It may be necessary to loosen the lower two nuts that secure the motor to the mounting brackets in order to
perform the following step.
4. Pivot the motor toward the pump, and remove the belt from around the motor pulley.
5. Remove the belt from around the pump pulley.
6. Install the replacement belt around the pump pulley and around the motor pulley.
7. Pivot the motor so the belt is taut, and secure the motor in position by tightening the nuts loosened in step 3 just
enough to hold the motor.
8. Test belt tension by pressing on the belt midway between the pulley. The belt should flex approximately 1/8 in
(3 mm).
9. If belt tension is correct, tighten the nuts securely. If tension is not correct, loosen the nuts and repeat step 7 and
step 8.
10. Reinstall cover and secure with eight screws.
Figure 14. Replacing the Belt
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