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Main Engine fuel oil pump overhaul

shut fuel oil inlet valve, open drain valve and remove oil.dismount high pressure pipe and puncture valve suction valve assembly. Measure fuel pump lead or Pmax value can be adjusted by adding
shims. Fuel pump lead or Pmax can be adjusted by adjusting the relative position of cam with camshaft. this can be done by attaching hydraulic pumps in camshaft and turning cam with special tool by mounting lead measuring tool on the top of plunger. advance cam to increase pmax. the top cover and plunger barrel assembly removed together by loosening top cover bolts and attaching the dismounting tool. plunger barrel is separated from the top cover by keeping it in a vice.
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