Periodic Inspection Procedure; Periodic Inspection Intervals; Inspection Procedure - Komatsu 4D98 Series Shop Manual

8. Turbocharger (for 4TNE 1067Jl
8.3 Periodic Inspection Procedure
(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.
Application Inspection interval
For vehicles (automobiles) Every 6 months Every 12 months
Every 24 months
or 60,000 km or 150,000 km or 300,000 km
For construction machinery Every 6 months Every 12 months Every 24 months
or 500 hours or 1,000 hours or 2,000 hours
For farming machinery Every 6 months
Every 12 months Every 24 months
or 200 hours or 400 hours or 800 hours
For marine use Every 6 months
Every 12 months Every 24 months
or 1,500 hours or 3,000 hours or 6,000 hours
Inspection item
Rotor rotation 0
Rotor play 0
Overhaul and overall inspection
0
Oil filter cleaning and inspection
Engine oil replacement
Shall conform to engine manufacturer's manual.
(2) Inspection procedure
(2.1) Rotor rotation
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 turbocharger 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 bearing or rotor may be defective in this state, either replace or overhaul the turbo-
charger.
(2.2) 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 blind the oil inlet and outlet holes with
adhesive tape.
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