Pneumatic Circuit System Problems Repair and Troubleshooting
5 - 34 046-001141-00 A5/A3™ Service Manual
5.3.2.3 Adjust the Pressure Switch
Adjust the O2 supply pressure switch and drive gas pressure switch as described below.
Use a flathead screwdriver to adjust the O2 supply pressure switch as shown below. Turn for small
degrees each time such as 30 degrees. Note that turning the pressure switch clockwise will decrease
its alarm limits and counterclockwise increase its alarm limits. Test the assembly after each pressure
adjustment is made. Repeat until the pressure switch is properly adjusted and is within specification
(nominal 220 kPa +/- 10 kPa).
FIGURE 5-28
5.3.2.4 Adjust the Regulator of the Pipeline Gas Supply Inlet
Assembly
Pull up the knob cover of the regulator. Turn the cover clockwise to increase pressure or
counterclockwise to decrease pressure, as shown below. Bleed the inside pressure of the pipeline gas
supply inlet assembly after each pressure adjustment is made, using the Regulator Calibration hose
(PN 0453-00-1216). Then, turn on the pipeline gas supply again. Observe the adjusted pressure
through the test pressure gauge. Adjust to 200kPa.
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