82E-5 – 98E-5 SERIES 8-7
8. TURBOCHARGER
8.3 Periodic Inspection Procedure
8.3.1 Periodic inspection intervals
Periodically inspect the turbocharger for the overall conditions and fouling.
The inspection interval varies with the operating conditions, but refer to the table below for the guideline for each
application.
8.3.2 Inspection procedure
(1) Rotor rotation inspection
Inspect the rotor rotation by listening to any abnormal sound generation during rotation.
For inspection with a sound detecting bar, bring the tip end of the bar into strong contact with the turbo-
charger case and raise the engine speed gradually.
If any high pitch sound is generated at intervals of 2 to 3 seconds, the rotation is abnormal. Since the bear-
ing or rotor may be defective in this state, either replace or overhaul the turbocharger.
(2) Rotor play inspection
Remove the turbocharger from the engine and inspect the rotor play in the axial and radial directions
according to the procedure below.
After removing the turbocharger from the engine, always bind the oil inlet and outlet holes with adhesive
tape.
Rotor play in axial direction
Application Inspection interval
For construction machinery
Every 6 months
or 500hrs
Every 12 months
or 1,000hrs
Every 24 months
or 2,000hrs
Rotor rotation
Q
Rotor play Q
Overhaul and overall inspection Q
Oil filter cleaning and inspection
Based on operation manual
Engine oil replacement
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