2000 Hour/24 Month - Northern Lights M80A13S Operator's Manual

Lubrication & Maintenance/2000 Hour/24 Month
Remove, Inspect and Clean Engine
Aftercooler Core
IMPORTANT: Initially remove and inspect the
aftercooler core at 250 hour or three month
service interval on a new engine. Then,
remove and clean at every 500 hour or 12
month interval thereafter.
IMPORTANT: Ensure Service Kit RE18060 is readily
available before removing aftercooler core.
Air side seals will be destroyed during core
removal, and RE18060 kit includes required
replacement seals, as well as end cap O-rings.
1. Close sea cocks and drain the sea water system.
3. Loosen clamps (B), remove mounting bolt (C) and
remove water line from rear of aftercooler.
4. Remove four cap screws (D) and remove rear cap
and O-ring.
5. Remove clamps (E) and remove hoses from front cap.
6. Remove four cap screws (F), front cap and O-ring.
7. Remove aftercooler core from the rear of the engine.
A—Clamp
B—Clamps
C—Mounting Bolt
8. Thoroughly clean all buildup from both end caps.
9. Use a 4.76 mm (3/16 in.) diameter brass rod to clean
out any buildup in each tube. Run the rod the entire length
of each tube to push debris out.
10. Flush the tubes with clean water, making sure all
tubes are cleared of debris. Clean (with brass rod) and
remaining debris from tubes.
If you suspect that your aftercooler core is defective, have
your authorized servicing dealer or engine distributor
pressure test for leaks. Replace aftercooler core as
required.
D—Cap Screws
E—Clamps
F— Cap Screws
OM3-80 12/21
Remove Clamp And Air Filter Element
Remove Rear Cap
Remove Front Cap
Clean Aftercooler Core
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