Service Manual

Marine Gear Oil Cooler ISB, ISBe and QSB (Common Rail [...]
Page 8-68 Section 8 - Cooling System - Group 08
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Remove
CAUTION
Removing the sea water supply line for the shaft log
seal will allow sea water to leak into the vessel, if the
line is not plugged. To reduce the possibility of
damage, be sure to plug the supply line and prevent
sea water from leaking into the vessel.
Remove the aftercooler sea water discharge hose from
the gear cooler.
Remove the marine gear cooler sea water discharge hose
form the gear cooler.
Remove and plug the sea water supply line for the shaft
log seal from the gear oil cooler (if equipped).
Remove the transmission oil supply and return lines; mark
their locations.
Disconnect the marine gear oil pressure/temperature
sensor (if equipped).
Remove the two cooler bracket to cylinder head mounting
capscrews and the marine gear oil cooler.
Remove the two bracket to cooler mounting capscrews.
Disassemble
Place the cooler in a vise and remove the two oil line
fittings from the gear cooler, if necessary. Mark the fitting
locations prior to removal.
Inspect for Reuse
Plug one gear oil port and attach an air supply line to the
other gear oil port with a quick disconnect fitting. Apply
thread sealant to the threads to prevent leaks. Do not
allow sealant to enter the gear oil cooler.