6-2 Monthly Maintenance Operations

6-2-1 Drive Belt Tension

NOTE: This operation should be carried out by an operator / mechanical maintenance engineer.

For the granulator to function correctly, it is extremely important that the drive belt is always tight. Correct tension reduces the load of the rotor bearings and minimizes wear and stretching of the belt. To check and adjust belt tension, carry out the following procedure:

1.Turn off the machine and lockout power by using the disconnect switch, or remove the fuses from the electrical control panel.

2.Remove the belt guard by unscrewing the ten screws that hold it in place.

3.Open the front panel.

4.Remove the bin.

5.Open the rear panel.

6.Loosen the nuts that lock the motor base slide.

7.Loosen the tie rod

8.Adjust the belt tension, turning the tie rods forward.

9.Turn the tie rod to bring the motor square to the belt axis.

10.After the adjustment, lock the nuts again, and close the rear panel, refitting the proper locking latch.

11.Reinsert the bin, close the front panel, refit the belt guard and unlock the power or replace the fuses in the control panel.

6-2-2 Proper Belt Tension

Measure the belt span and divide by 64 to get the allowable belt deflection. With a belt gauge, measure the force it takes to deflect the belt the amount calculated.

NOTE: Check your belt gauge’s instructions for proper scale settings. Belt tension gauges are available from customer service or your belt manufacturer.

Compare the gauge reading with the chart value for the belt cross- section used. (See

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Sterling BP810, BP814, BP818 manual Monthly Maintenance Operations, Drive Belt Tension, Proper Belt Tension

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