AD07.52-D-7000-03A | PEC test of hydraulic system fuel pressures and internal leaktightness, fuel system for internal leaks |
| Scope of test | Test instrument/Test connection | Action/ Prerequisite | Specified value | Possible cause / Remedy | ||
1.0 | Check fuel system for inner leakage | Switch off engine Valve screw on pressure testing instrument closed after 30 minutes Valve screw on pressure testing instrument closed After test, relieve fuel pressure with measuring cup and allow remaining fuel to run out | > 3.0 bar > 2.5 bar | Quick pressure drop: Fuel hoses and connection pieces Slow pressure drop: Check fuel injection valves Diaphragm pressure regulator | |||