Hydraulic System Proof Test

• Perform the test using a seal test tool.

1. Screw the fitting to the lower end of the test tool.
2. Install the expansion tank pressurized cap onto the fitting of the test tool.
3. Manually operate the piston of the test tool and pressurize the cap. Check that the valve opens at the specified pressure read from the manometer.

Pressurized cap setting
0.98 ± 0.1 bars (1 ± 0.1 kg/cm²)

Hydraulic System Proof Test

• Unscrew and remove the pressurized cap from the expansion tank.

1. Screw the hydraulic system proof testing tool and relevant fitting onto the expansion tank filler neck.
2. Manually pressurize the circuit and check that the pressure is maintained at the specified value. If the pressure is incorrect, check that there are no leaks in the radiator or sleeves.

Hydraulic system test pressure
1.08 bars (1.1 kg/cm²)

CAUTION
For safety reasons never let the pressure rise above 1.38 bars (1.4 kg/cm²) when testing with the testing tool.