Yanmar 4JH45 Operation Manual page 70

PERIODIC MAINTENANCE
1. Put a pan under the drain cock
(Figure 1, (2)) to catch fuel.
2. Open the drain cock and drain water
and sediment. Close the drain cock
when the fuel is clean and free of air
bubbles.
Changing the Engine Oil and
Replacing the Engine Oil Filter
Element
The engine oil on a new engine becomes
contaminated from the initial break-in of
internal parts. It is very important that the
initial oil replacement is performed as
scheduled.
It is easiest and most arailable to drain the
engine oil after operation while the engine
is still warm.
WARNING
Burn Hazard.
If you must drain the engine oil while it
is still hot, stay clear of the hot engine
oil to avoid being burned. Always wear
eye protection.
1. Turn the engine off.
2. Remove the engine oil dipstick. Attach
the oil drain pump (if equipped) and
pump out the oil.
For easier draining, remove the engine
oil fill cap. Dispose of used oil properly.
NOTICE
• Prevent dirt and debris from
contaminating engine oil. Carefully
clean the dipstick and the surrounding
area before removing the dipstick.
• Always be environmentally
responsible.
64
3. Remove the engine oil filter (Figure 2)
with a filter wrench (turn
counterclockwise).
Figure 2
Note: 4JH45/4JH57 shown.
4. Install a new filter element and tighten
by hand until the seal touches the
housing.
5. Turn filter an additional 3/4 turn
clockwise with a box wrench. Tighten to
20 to 24 N·m (177 to 212 in.-lb).
6. Fill with new engine oil. See Adding
Engine Oil on page 39.
NOTICE
Never mix different types of engine oil.
This may adversely affect the lubricating
properties of the engine oil.
Never overfill. Overfilling may result in
white exhaust smoke, engine overspeed
or internal damage.
7. Perform a trial run and check for oil
leaks.
8. Approximately 10 minutes after
stopping the engine, remove the oil
dipstick and check the oil level. Add oil
if the level is too low.
JH Series Operation Manual
057148-00X00