Pressure gauge block with three valves. 1 - low pressure valve, 2 - central valve, 3 - high pressure valve, 4 - check valve, 5 - high pressure line quick-release adapter, 6 - low pressure line quick-release adapter.
Pressure gauge block with two valves. 1 - low pressure valve, 2 - central valve, 3 - high pressure valve, 4 - high pressure line quick-release adapter, 5 - low pressure line quick-release adapter, 6 - check valve.
2. Open the valves on the charging cylinders.
3. Open the high pressure valve and charge the system to 98 kPa. Close the high pressure valve and the low pressure valve.
4. Using a leak detector, check the hose connections for leaks.
If leaks are found, tighten nuts and bolts to the specified torque and recheck the system for leaks.
If leaks are found, repair or replace the faulty component.
5. Evacuate the system.