A5/A3™ Service Manual 046-001141-00 5 - 39
Repair and Troubleshooting Pneumatic Circuit System Problems
FIGURE 5-33
10. Compress the negative pressure ball still connected to tube 25 to bleed the air inside.
FIGURE 5-34
11. Release the negative pressure ball. If the negative pressure ball is fully expanded within 30
seconds, it indicates that the total flowmeter leaks.
12. Re-connect tube 25. Disconnect tube 58 and pull out its end connecting the back pressure
valve. Disconnect tube 26 and pull out its end connecting the total flowmeter.
13. Occlude the pulled-out tube end on the back pressure regulator by using one 3126-08-00 tube
plug and connect the negative pressure ball to the pulled-out end of No.26 PU tube through
3106-06-08 adapter connector.
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