Yanmar 4LHA-HTP Operation Manual page 486

Chapter 4 Intake and Exhaust System
4. Turbocharger
4 - 4 Periodic Inspection Procedure
4 - 4 - 1 Periodic inspection intervals
Periodically inspect the turbocharger for the overall conditions and fouling.
varies with the operating conditions, but refer to the table below as guideline.
—
Inspection item
Rotation of turbine shaft
Play of turbine shaft
Overhaul and inspection
4 - 4 - 2 Inspection procedure
(1) Rotation of turbine shaft
Inspect the turbine shaft operation by listening to any abnormal sounds during running.
inspection using a listening bar, bring the tip end of the bar into strong contact with the turbocharger
case and raise the engine speed gradually.
to 3 seconds, the rotation is abnormal. Since the bearing or rotor may be defective in this case,
either replace or overhaul the turbocharger.
Inspection interval
Every 6 months
Every 12 months
or 1,500 hours or 3,000 hours
o
If any high pitch sounds are generated at intervals of 2
4-9
The checking interval
Every 24 months
or 6,000 hours
O
o
4LHA Ser
For