A5/A3™ Service Manual 046-001141-00 3 - 31
Periodic Maintenance Pneumatic Leak Tests
3.9 Pneumatic Leak Tests
Turn all fresh gas flows to 0 L/min.
3.9.1 N2O Cylinder Leak Test
1. Remove the N2O line pressure hose from the line pressure inlet on the A5/A3.
2. Mount a full N2O cylinder to the rear panel yoke. If necessary, place a new clean tank washer
between the cylinder and the yoke to minimize any leaks at the yoke connection.
3. Open the N2O cylinder until its pressure gauge indicates cylinder pressure.
4. Close the N2O cylinder.
5. The N2O cylinder pressure gauge should not drop more than 10% of its initial pressure over 1
minute.
3.9.2 O2 Cylinder Leak Test
1. Remove the O2 line pressure hose from the line pressure inlet on the A5/A3.
2. Mount a full O2 cylinder to the rear panel yoke. If necessary, place a new clean tank washer
between the cylinder and the yoke to minimize any leaks at the yoke connection.
3. Open the O2 cylinder until its pressure gauge indicates cylinder pressure.
4. Close the O2 cylinder.
5. The O2 cylinder pressure gauge should not drop more than 10% of its initial pressure over 1
minute.
3.9.3 AIR Cylinder Leak Test
1. Remove the AIR line pressure hose from the line pressure inlet on the A5/A3.
2. Mount a full AIR cylinder to the rear panel yoke. If necessary, place a new clean tank washer
between the cylinder and the yoke to minimize any leaks at the yoke connection.
3. Open the AIR cylinder until its pressure gauge indicates cylinder pressure.
4. Close the AIR cylinder.
5. The AIR cylinder pressure gauge should not drop more than 10% of its initial pressure over 1
minute.
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