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In Reply to: MF135 diesel air lock posted by David Anderson on Monday, February 04, 2008:
You need to follow the correct sequence. Start at the primary fuel filter by opening the vent plug on top, hand prime till free of bubbles then tighten plug, slacken secondary filter outlet union and bleed, slacken the 2 vent plugs on injector pump and bleed, tighten first the lower and then the upper plug whilst priming. At this stage tractor may start, if not, you will have to slacken the unions at the injectors and crank engine till free of air. It should now start. If the tractor is ready for new fuel filters this a good time to install them. LOL