Yanmar 4LHA-HTP User Manual

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

Yanmar 4LHA-HTP Specifications

General

Brand	Yanmar
Model	4LHA-HTP
Category	Engine
Language	English