PERIODIC MAINTENANCE
108
6LY3 Operation Manual
Clean the Exhaust / Water
Mixing Elbow
The mixing elbow is attached to the
turbocharger. The exhaust gas is mixed
with seawater in the mixing elbow.
1. Clean dirt and scale out of the exhaust
gas passage and seawater way in the
mixing elbow.
2. Repair the crack or damage of the
mixing elbow by welding, or replace if
necessary.
3. Inspect the gasket and replace if
necessary.
Clean the Turbocharger Blower
Contamination of the turbocharger blower
causes blower revolutions to drop and
engine output to fall.
If a drop of engine output is noted (by
about 10%), clean the blower. This should
only be done by a trained and qualified
technician. See your authorized Yanmar
marine dealer or distributor to clean the
turbocharger blower.
Flush the Aftercooler
Contamination of the aftercooler causes
the engine output to fall.
If a drop of engine output is noted (by
about 10%), flush and clean the
aftercooler.
This should be done only by a trained and
qualified technician. See your authorized
Yanmar marine dealer or distributor to
flush the aftercooler.
Check the Wiring Connectors
Check for any loose connections.
Tighten All Major Nuts and
Bolts
After long period of usage, the major nuts
and bolts of the engine may loosen.
Tighten the major nuts and bolts to the
standard tightening torques. This
inspection requires specialized knowledge
and techniques. See your authorized
Yanmar marine dealer or distributor to
tighten major nuts and bolts.
Check / Replace the Flexible
Engine Mounts
The rubber tension of the flexible engine
mounts is lost after many hours of use.
This leads to a drop in vibration absorption
performance, and also causes centering
misalignment of the propeller shaft.
1. Check if the rubber is cracked. If
necessary, replace the flexible mount.
2. Check for abnormal noise or vibration
while engine is running. If necessary,
replace the flexible mount.
CAUTION
NEVER allow engine oil or diesel
fuel oil to contact the flexible
rubber mount. Oil makes rubber
deteriorate.
0000155en
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Содержание 6LY3 series
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Страница 122: ...PERIODIC MAINTENANCE 114 6LY3 Operation Manual This Page Intentionally Left Blank Back ...
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