Yanmar 3YM20, Руководство по обслуживанию

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2. Inspection and adjustment
19
IMPORTANT:
If the cooling water runs short quickly or when the coolant tank runs short of water with the coolant
recovery tank level unchanged, water may be leaking or the air tightness may be lost. Increase in the
water level of the coolant recovery tank during operation is not abnormal.
The increased water in the coolant recovery tank returns to the coolant tank when the engine is cooled
down.
If the water level is normal in the coolant recovery tank but low in the coolant tank, check loosened
clamping of the rubber hose between the coolant tank and coolant recovery tank or tear in the hose.
(6) Check the alarm lamps & devices
Before and after starting the engine, check to see that the alarm functions normally. Failure of alarm
cannot warn the lack of the engine oil or the cooling water. Make it a rule to check the alarm operation
before and after starting engine every day.
When the sensor detects a problem during operation, the lamp comes on and the buzzer goes off.
Alarm lamps are located on the panel, buzzer is located on the back of panel.
Under normal conditions, the monitors are off. When there is a problem, the monitors light up.
Normal action of alarm devices
Alarm devices act as shown below. Check that the alarm lamps and buzzer are working normally,
when the key is turned on.
(7) Check the leakage of water, lube oil and fuel.
Before and after starting the engine, check the leakage of cooling water and seawater from cooling water
system. Also check the leakage of lube oil and fuel.
(8) Check/adjust the remote control operation
Make sure that the accelerator of a boat can be operated smoothly before starting the engine. If it feels
heavy to manipulate, lubricate the accelerator cable joints and pivots. Adjust the accelerator cable if
there is a dislocation or excessive play between the accelerator and the governor lever.
Battery low
charge alarm When the alternator output is too low, the lamp will come on.
When charge begins, the lamp will turn off.
(The alarm buzzer will not sound, when the lamp comes on.)
Coolant high
temperature
alarm When the temperature reaches the maximum (95°
C
[203F] or higher), the
lamp will light.
Continuing operation at temperatures exceeding the maximum limit will
result in damage and seizure.
Check the load and the fresh water cooling system for any abnormalities.
Lubricating oil
low pressure
alarm When the lube oil pressure falls below normal, the oil pressure sensor will
register this and the lamp will come on and alarm will sound.
Continuing operation with insufficient oil pressure will result in damage and
seizure.
Check the oil level.
Water in sail
drive seal
alarm When seawater is detected between the seals of sail drive, the lamp will
come on and the alarm will sound.
Key switch OFF
→
ON START
→
ON
Engine Before start Running
Alarm buzzer Goes on Stop
Alarm lamps
Battery low charge alarm Light Off
Coolant high temperature alarm Off Off
Lube oil low pressure alarm Light Off
Water in sail drive seal alarm Off Off