A7™ Service Manual 046-006272-00 5 - 35
Repair and Troubleshooting Pneumatic Circuit System Problems
FIGURE 5-22
8. Turn on the pipeline gas supply and record the reading on the test pressure gauge. If the
difference between this reading and the reading on the O2 pipeline pressure gauge is more
than 0.1 MPa (14.5 psi), it indicates that the O2 pipeline pressure gauge is damaged. Handle this
problem as described in the troubleshooting table.
9. Reconnect tube 39.
NOTE: For numbers of all PU tubes, refer to sections and 1.2.2 Pneumatic
Connections.
II N2O supply inlet assembly:
1. Turn off the pipeline gas supply. Open the needle valve to bleed the residual pressure and close
the needle valve. Disconnect tube 119. The end of the tube which connects the EFCS module is
pulled out but the other end is not pulled out.
2. Connect 1MPa test pressure gauge, the pulled-out end of tube 119, and EFCS module N2O inlet
through “3106-04-06 adapter connector” and Y piece (17).
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