Yanmar 4JH45 Operation Manual page 71

12/05
NOTICE
Be careful not to get any oil on the
V-ribbed belt. Oil on the belt
causes slipping and stretching.
Replace the belt if it is damaged.
Changing the Marine Gear Oil and
Replacing the Marine Gear Oil Filter
(If Equipped)
(1)
(2)
(3)
(4)
Figure 3
Note: 4JH80/4JH110 engines with
KMH4A marine gear shown.
Refer to the Operation Manual
for the marine gear or sail drive
for procedure.
1. Remove cap from the filler port and
attach an oil drain pump. Drain marine
gear oil.
NOTICE
Always be environmentally responsible.
2. KMH4A Marine Gear:
Wash the marine gear oil filter:
(a) Remove side cover (Figure 3, (5))
and remove the filter (Figure 3, (2)).
(b) Clean the filter thoroughly with
kerosene or clean diesel fuel.
JH Series Operation Manual
(5)
0004495
PERIODIC MAINTENANCE
(c) Hold the filter in place with the coil
spring (Figure 3, (3)) and insert into
the case. Install a new O-ring
(Figure 3, (4)) in the side cover.
(d) Install side cover and tighten side
cover bolts.
3. Fill marine gear with clean marine gear
oil. See Marine Gear Oil Specifications
on page 39.
4. Perform a trial run and check for oil leaks.
5. Approximately 10 minutes after
stopping the engine, remove the oil
dipstick and check the oil level. Add oil
if the level is too low.
Checking and Adjusting the
Alternator V-ribbed belt Tension
WARNING
Sever Hazard. Perform this check with
the power switch off and the battery
switch turned off to avoid contact with
moving parts.
NOTICE
• When there is not enough tension in the
V-ribbed belt, it will slip and the coolant
pump will fail to supply coolant. Engine
overheating and seizure will result.
• Never get any oil on the belt(s). Oil on
the belt causes slipping and stretching.
Replace the belt if it is damaged.
65