Service Manual

Sea Water Pump ISB, ISBe and QSB (Common Rail [...]
Page 8-84 Section 8 - Cooling System - Group 08
To buy Cummins Parts and Service Manuals, Training Guides, or Tools go to our website at https://store.cummins.com
CAUTION
Zinc plugs expand and can break off during removal.
Inspect the zinc plug to make sure it is in one piece.
Refer to Procedure 008-059. If not, it must be replaced
with a new zinc plug, and the broken pieces must be
retrieved from the aftercooler to prevent damage to
components downstream in the sea water system.
Shut off the sea water supply.
Drain the sea water pump by removing the zinc plug from
the aftercooler. Refer to Procedure 010-005.
Remove the cover from the back of the sea water pump.
Inspect the cover for signs of grooves worn into the cover
surface.
Inspect the impeller for missing, badly worn blades, or
chunks of blades missing.
If the cover is badly grooved or the impeller is badly
damaged, the pump must be repaired or replaced. See
the Repair step in this procedure for replacing the sea
water pump impeller without removing the pump from the
engine.
If the impeller is damaged, the sea water circuit down
stream (fuel cooler and aftercooler and aftercooler
element) of the pump must be checked and cleaned.
Inspect the cover o-ring for cuts or other damage.
Install the cover on the back of the pump with the three
mounting capscrews.
Torque Value: 24 N•m [ 212 in-lb ]
Repair
CAUTION
Zinc plugs expand and can break off during removal.
Inspect the zinc plug to make sure it is in one piece.
Refer to Procedure 008-059. If not, it must be replaced
with a new zinc plug, and the broken pieces must be
retrieved from the aftercooler to prevent damage to
components downstream in the sea water system.
Shut off the sea water supply.
Drain the sea water pump by removing the zinc plug from
the aftercooler. Refer to Procedure 010-005.
Remove the cover from the back of the sea water pump.