Pilot Air PAC Series Users Maintenance And Spare Parts Manual page 34

CHECKING THE TRANSMISSION BELT TENSION (Fig. 9)
- When the compressor is stopped,
remove the right side panel C e the
rear panel D and check the belt
tension.
- Use a suitable measuring
instrument that determines with
precision the belt tension degree
by means of a frequency
measuring device in order to
perform this control.
Operate as follows:
- Place the microphone of the
measuring instrument near to the
belt (about half way) and hit the
belt with a wrench.
- Read the value detected by the
instrument and if different from the
values indicated in the table (fig.
9A), adjust the tension:
Value higher = belt too tight
Value lower = belt too loose
- Adjust by loosening the four bolts
E1 and adjust the tension with the
nut E2.
- After adjusting, tighten the bolts
E1.
- Check the frequency value again
and if necessary, repeat the
operation.
REPLACING THE TRANSMISSION BELT (Fig. 9)
- When the compressor is stopped, remove the right side panel C e the rear panel D.
- Loosen the four bolts E1 and act on the nut E2 loosening belt E until completely loose.
- Remove the belt and replace it with a new one.
- After replacing, check the belt tension as describe previously.
- Having made the replacement, after the first 30 minutes of operation, stop the machine, wait
approximately 30 minutes (cooling) and check tightening of the belts as previously described.
34 | P a g e
Maintenance
PLUS 56-75-Cod.197DD8805