124 589 15 21 00
Analyzer
000 589 75 63 00
Adapter
B09.40-0016-11
Check the relief valve (1) for external damage. In case of external deformation or if adjustment has been changed, replace the complete turbocharger.
Install manual pump (2) into the intake pipe (3) of the relief valve (1) and apply 1.25 bar pressure.
Note that the maximum pressure for the test should not exceed 2 bar, since the diaphragm may be damaged.
If the relief valve membrane (1) is damaged, the pressure will exit between the valve body and the stem, at the location shown by the arrow. In this case, replace the complete turbocharger.
The relief valve test (1) to be carried out without the manual pump equipped with pressure gauge requires care and criteria to be adopted:
It may be performed using a pressure gauge with a scale up to 5 bar, however, it shall have an adjusting log regulator to control the pressure, which may not exceed 2 bar.
For this control of the turbocharger, the engine must be stopped, and the compressed air can exit from an outside line or one of the vehicle's reservoirs. The compressed air must be clean and dry.