Pneumatic Circuit System Problems Repair and Troubleshooting
5 - 44 046-006272-00 A7™ Service Manual
FIGURE 5-32
7. Release the negative pressure ball. If the negative pressure ball is fully expanded within 30
seconds, it indicates that the total flowmeter assembly is damaged. In this case, pull out the tube
plug at the inlet of needle valve and perform the following operations.
8. Pull out No.26 PU tube which connects the back pressure regulator to the total flowmeter.
Disconnect at the total flowmeter end.
9. Occlude the pulled-out tube end on the total flowmeter by using 3126-08-00 tube plug.
FIGURE 5-33
10. Compress the negative pressure ball still connected to tube 25 to bleed the air inside.
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