PERIODIC MAINTENANCE
116
JH Series Operation Manual
PERIODIC MAINTENANCE
PROCEDURES
WARNING
Exposure Hazard
Always wear personal protective
equipment when performing periodic
maintenance procedures.
Daily Checks
Before you head out for the day, make
sure the YANMAR engine is in good
operating condition.
NOTICE
It is important to perform the daily checks as
listed in this Operation Manual.
Periodic maintenance prevents unexpected
downtime, reduces the number of accidents
due to poor engine performance and helps
extend the life of the engine.
Make sure you check the following items.
Visual Checks
1. Check for engine oil leaks.
2. Check for fuel leaks.
WARNING
Piercing Hazard
Avoid skin contact with the high-pressure
diesel fuel spray caused by a fuel system
leak, such as a broken fuel injection line.
High-pressure fuel can penetrate your
skin and result in serious injury. If you are
exposed to high-pressure fuel spray,
obtain prompt medical treatment.
Never check for a fuel leak with your
hands.
WARNING
Always use a piece of wood or
cardboard. Have your authorized
YANMAR Marine dealer or distributor
repair any damage.
3. Check for engine coolant leaks.
4. Check for damaged or missing parts.
5. Check for loose, missing or damaged
fasteners.
6. Check the electrical harnesses for
cracks, abrasions, and damaged or
corroded connectors.
7. Check hoses for cracks, abrasions, and
damaged, loose or corroded clamps.
8. Check the fuel filter/water separator for
presence of water and contaminants.
If you find any water or contaminants,
drain the fuel filter/water separator.
See Draining Fuel Filter/Water
Separator on page 123
. If you have to
drain the fuel filter/water separator
frequently, drain the fuel tank and
check for the presence of water in your
fuel supply.
NOTICE
If any problem is noted during the visual
check, the necessary corrective action
should be taken before operating the
engine.
Check Diesel Fuel, Engine Oil and
Engine Coolant Levels
Follow the procedures in
to check
these levels.
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