A7â„¢ Service Manual 046-006272-00 5 - 43
Repair and Troubleshooting Pneumatic Circuit System Problems
5.3.3.2 Leak Test of the Flowmeter Related Assembly
Perform a leak test of the flowmeter related assembly (from flow regulator to total flowmeter) by
using the following tools:
• Negative pressure ball (quantity:1)
• 3106-06-00 adapter connector (quantity:1)
• 3106-06-08 adapter connector (quantity:1)
• 3126-06-00 tube plug (quantity:3)
• 3126-08-00 tube plug (quantity:1)
• PU tube (6X100) (quantity:1)
Test procedures:
1. Turn off the pipeline gas supplies and turn on the system switch. Bleed the residual pressure by
opening the flow regulators.
2. Turn off the system switch. Turn on the flow regulators and turn them counterclockwise for
more than half a circle.
3. Pull out No.25 PU tube which connects the total flowmeter to the vaporizer manifold assembly.
Disconnect at the vaporizer manifold end.
4. Pull out No.137, 49 and 51 PU tubes which connect with the flow regulator. Disconnect at flow
regulator end.
5. Occlude the pulled-out tube end on the flow regulator by using three 3126-06-00 tube plugs.
FIGURE 5-31
6. Connect the other end of the negative pressure ball to the pulled-out end of No.25 PU tube
through 3106-06-08 adapter connector, as shown below, and then flatten the negative pressure
ball to remove the gas inside.
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