Sterlco BP800 Series Granulators - Manual (Page 24)

800 Series beside-the-press Chapter 5: Maintenance 24 of 43
5-2 Preventative and Corrective Maintenance
Monthly Maintenance Operations
Drive Belt Tension
This operation should be carried out by an operator or
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, use the following procedure:
1. Turn OFF the machine and lock out power by using the
disconnect switch, or remove the fuses from the electrical
control panel.
2. Remove the belt guard by unscrewing the ten (10) 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 by turning the tie rods forward.
9. Turn the tie rod to bring the motor square to the belt axis.
10. After the adjustment is made, lock the nuts back in place and
close the rear panel, refitting the proper locking latch.
11. Reinsert the bin and close the front panel.
12. Refit the belt guard and unlock the power or replace the
fuses in the control panel.
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.
Check your belt gauge’s instructions for proper scale settings. Belt
tension gauges are available from the customer service department.
Compare the gauge reading to chart value for the belt cross-section
used (see table below.).