O6140 03/03
23
SERVICING
FLUSHING THE COOLING SYSTEM
(cont.)
6. Re-drain the engine and refi ll the jacket (fresh)
water circuit with coolant mixture as described
in previous section.
7. Close cooling system air vent.
8. Open sea cock.
9. Start engine. Monitor temperature gauge care-
fully and check cooling system for leaks.
SP16. HEAT EXCHANGER CLEANING
1. Clean the heat exchanger core once a year or
after 2400 hours of operation.
2. Drain expansion tank and heat exchanger.
3. Remove heat exchanger covers.
4. Clean the inside of exchanger core tubes using a
metal rod.
5. Re-assemble using new gaskets. Fill the cooling
system, start the engine and check for leaks.
SP17. CLEANING GEAR OIL COOLERS
For propulsion engines only:
1. Drain fresh water cooling circuit.
2. Remove end covers of gear oil cooler.
3. Wash the core in diesel fuel and blow it dry with
compressed air. Clean the end covers of the core
with a steel brush and use a metal rod to clean
inside of tubes.
4. Re-assemble using new gaskets. Fill the cooling
system, start the engine and check for leaks.
SP18. ZINC ELECTRODES
1. Zincs are installed in the heat exchanger cooling
system to protect your engine from electrolysis.
Check them faithfully every 250 hours. If you
are in warm salt water or where electrolysis is a
known problem, check them more often. Keel
cooled engines do not have zincs.
2. Heat exchanger cooled engines: Drain the raw
water from heat exchanger
(Fig's. 1&4,13)
, then
drain the expansion tank
(Fig's 1&4,1)
. Remove
zinc holders
(Fig's 1&4,18)
from back end of heat
exchanger and raw water pipe elbow.
3. Scrape or steel brush the zinc electrode clean.
If more than 50% of the electrode is corroded
away, replace it with a new one. The electrode
screws out of the holder.
4. Re-install the zinc holders. Be sure the threads
are clean for good metal-to-metal contact.
5. Refi ll cooling system, start engine, check for
leaks.
SP19. RAW WATER PUMP
1. Heat exchanger cooled engines only. Change
the the sea water pump impeller every year, or as
needed.
2. Remove the pump end cover. Pry out the
impeller with the help of two screwdrivers. Be
sure you remove all pieces of a failed impeller.
NOTE: Place some kind of protection under the
screwdrivers in order not to damage the
housing.
3. Clean the inside of the housing.
4. Press in the new impeller and place the sealing
washers in the outer end of the impeller center if
this has not already been done.
5. Replace the cover using a new gasket.
NOTE: Make sure that there is always an extra
impeller and cover gasket in reserve on board.
SP20. COOLANT FILTER
1. Change coolant fi lter after the fi rst 250 hours, the
fi rst 500 hours and every 500 hours thereafter.
2. Shut off both valves on fi lter body.
3. Use fi lter wrench to remove fi lter.
4. Make sure old gasket is removed.
5. Lubricate new fi lter gasket and screw on new
fi lter until gasket meets housing.
6. Hand tighten two-thirds of a turn more.
7. Open valves on fi lter body.
8. Start the engine and check for leaks.
9. Stop engine and check water level in expansion
tank.
SP21,22,23. GEARS, PTOS AND
GENERATORS
1. Manufacturer's service recommendations vary.
See your Owner's Manual for service informa-
tion. If you do not have a manual, see your local
dealer for the equipment in question.
NOTE: Some PTO and marine gears have rigid
lubrication requirements. Follow service
recommendations closely.
2. If you have a Northern Lights generator set, the
maintenance and operation recommendations
for the generator end are in a separate Owner's
Manual. If you do not have one of these
manuals, contact your local Northern Lights
dealer.
Summary of Contents for LUGGER L6140A
Page 30: ...O6140 03 03 30 DC Wiring Diagram C 5298B L6140AL 12 Volt Standard Ground...
Page 31: ...O6140 03 03 31 DC Wiring Diagram C 5228A L6140AL 24 Volt Standard Ground...
Page 32: ...O6140 03 03 32 DC Wiring Diagram C 5299 M6140AL 24 Volt Standard Ground...
Page 33: ...O6140 03 03 33 AC Wiring Diagram B 7429H M6140 with Voltage Regulator AVC63 12 all voltages...
