I need to order the injector pump for my B7001 Kubota..I could bleed 2 injectors and 1 does not bleed so I was advised to change all 3 at the same time..now would that mean I should order the injector pump and does that bring along the 3 injectors with it ??? and any idea what it s cost ?? and do I have to remove the pump to get the part number on it..?? thanks in advance johnny