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| 07.1—140 Venting Injection System | |||
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| Venting fuel filter |  | ||
| 1 Release union screw (3) at fuel filter. | |||
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| 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. |  | ||
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| Venting injection pump | |||
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| 3 Operate hand pump until bypass valve at injection pump opens (audible rattling sound). | |||
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| 07.1.8-140/1 F2 | |||
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| 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. | ||
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| 07.1.8-140/2 | ||
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