Venting Injection System

1 Release union screw (3) at fuel filter.

2 Release knob on hand feed pump and operate this pump until clear fuel (containing no air bubbles) emerges from union screw. Now tighten union screw again.

3 Operate hand pump until bypass valve at injection pump opens (audible rattling sound).

07.1.8-140/1 F2

4        Retighten knob on hand feed pump.

Note: This forces the pump piston against a sealing ring and seals the hand pump off from atmosphere. If knob is released during operation, hand feed pump will leak, allowing air to enter fuel system.

5        Run engine and check whether all connections are tight.