Sterling BP810, Operation And Installation Manual

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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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