Cummins 4BT – High Pressure Fuel Lines – Venting

17 mm, 19 mm
Caution: The pressure of the fuel in the line is sufficient to penetrate the skin and cause serious bodily harm.
Loosen the fittings at the injector, and crank the engine to allow entrapped air to bleed from the line. Tighten the

Caution: Do not bleed a hot engine as this could cause fuel to spill onto a hot exhaust manifold creating a danger of fire.
Operate the engine and vent one line at a time until the engine runs smoothly.