Service Manual

ISB, ISBe and QSB (Common Rail [...] Fuel Pump
Section 5 - Fuel System - Group 05 Page 5-23
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Inspect the gear housing, high-pressure pump mounting
bore, and mounting studs for cracks.
Replace if damage is found.
Marine Applications
Inspect the driveshaft for damage. Replace the fuel pump
if damage is found.
Inspect the o-ring seal area for damage. Clean and repair
any burred surfaces.
Assemble
The pump driveshaft nose and drive gear shaft mating
surface must be clean and dry prior to assembly.
Wipe off the driveshaft and gear with solvent and a lint-
free cloth. Do not touch the mating surfaces after wiping.
Rear Gear Train
Install the drive gear onto the driveshaft.
Install the driveshaft lockwasher and retaining nut and
finger tighten.