SENR9977 37 Testing and Adjusting Section 7. Start the engine and check for any leakage of fuel or air from the fuel lines. Check the Function of the Pressure Regulator 1. Remove the fuel line from the outlet for the supply for the fuel injection pump (3). 2. Install a pipe with a tap for a pressure gauge. Connect a 0 to 80 kPa (0 to 12 psi) pressure gauge. 3. Start the engine and run the engine at idle for two minutes in order to remove any trapped air. 4. Record the pressure reading at idle and at rated speed. The minimum pressure reading should be the following values: Bosch VP30 Idle ................................... 27.5 kPa (3.98 psi) Rated speed .......................
24 kPa (3.48 psi) Note: The maximum pressure reading at the inlet to the fuel injection pump is 80 kPa (12 psi). 5. Reconnect the fuel line. Run the engine at idle for two minutes in order to remove any trapped air. Check for the following issues if the pressures are outside of the above specifications. All electrical connections are installed correctly. There are no leaks in the fuel lines or connections. The O-ring on fuel filter housing (2) does not leak.