Need Help Bleeding a Perkins

[Jon]

Hi,
I've got a Perkins 4-108(50 hp)that is running very rough, after some fuel system work. I suspect the system needs to be bled. Does anyone know how to go about this?
Jon



Ringj@mediaone.net

[Mark Yashinsky]

What was the fuel system work??? Bleeding is workign from the fuel system pump (on the filter/separator and or engine fuel pump (a manual lever on it)) forward, opening each bleeder while pumping, until the fuel has no more bubbles coming out of the bleeder. Once you get past the injection pump and the engine runs, the injectors should purge themselves running the engine under load and some throttle. Once bleed, the fuel system should not need rebleeding unless the system is opened up again. Helpful hint, check all fuel connections for proper sealing. There is suction on some of the lines that can easily draw air in.