 When you run out of diesel you will have to bleed the air from the system before the engine will restart. You don’t say whether you have a inline injector pump or a rotary pump, an inline pump has the four injector pipes coming off the top of the pump in a line, a rotary pump has the pipes coming off the back in a circle and the bleeding method is different. To bleed the inline pump look at the top of the pump you see the four injector pipes, come down to the head of the pump and you see a stepped section of the head held on by a row of Allen screws, down from there on the side of the block you will see the bleed screws, open them and prime the lift pump till air free fuel comes out, close the screws and press the cold start button and the engine will start. To bleed the rotary pump, there are two bleed screws on the side of the pump, they ride piggyback on top of two other bolts one above the other, you will need a 5/16AF wrench to open them, when open prime the lift pump till clear fuel comes through, close the bottom one and prime again till the top one is clear and close it, now slacken the four injector pipes at the injectors and with the throttle on full turn the engine over on the starter till the injector pipes start spurting out fuel, tighten the pipes and the engine should start. If you fail have a look and see what type of pump you got it will be either a Simms inline or a CAV rotary on the right hand side of the Leyland 4.98 engine or a CAV rotary on the left side of a Perkins 4.236. I have posted a picture of an inline and a rotary pump, they are not off a JCB but show the bleed screws.
AJ
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