Yanmar 6LT Series - Page 48

INSPECTION AND MAINTENANCE
44
6LT Series Operation Manual
1) Fuel compliant with standard EN 590 (sulfur content less than 10 ppm) and/or ASTM D975 (sulfur content less than 15 ppm)
2) Minimum specifications of engine oil: compliant with standard ACEA E7 and/or API CI-4. Degree of viscosity: see the table on the page 28.
3) Engine coolant standard solution: organic base compliant with specifications ASTM D6210 Type 1-FF. If concentrated products are used, they
must be mixed 50% with water. Original Yanmar products are recommended.
4) The anode must be replaced if the corrosion has affected more than 50% of the volume of zinc.
5) Seawater/combustion air heat exchanger: clean both the air and water section; seawater/engine coolant exchanger: clean the seawater section;
seawater/oil exchanger: clean the seawater section.
Item Periodic Maintenance Interval
Daily 150 300 600 900 1200 2400 3000
Daily
Every
150 hours
or monthly
whichever
comes first
Every
300 hours
or 1 year
whichever
comes first
Every
600 hours
or 1 year
whichever
comes first
Every
900 hours
or 1 year
whichever
comes first
Every
1200 hours
or 2 years
whichever
comes first
Every
2400 hours
or 4 years
whichever
comes first
Every
3000 hours
or 5 years
whichever
comes first
Check seawater/engine oil heat
exchanger, seawater/engine coolant
heat exchanger and intercooler heat
exchanger (air-seawater). Clean if
necessary (5).

Turbocharger visual inspection

Fuel pre-filter replacement (1)
Replace at
600 h
Fuel filter replacement (1)
Replace at
600 h
Check auxiliary belt (V belt)
(alternator and engine cooling water
pump).

Replace
every
3 years
Check for signs of condensation
inside the fuel tank. Clean if
necessary.

Coolant replacement (3)

Check integrity of damper pulley
mounted on the crankshaft (front
side).

Check valve clearance.

Check the condition of exhaust
duct(s).

Check the oil level in the gearbox.

Change the oil level in the gearbox. Refer to the marine gear operation manual