EVERY 2000 HOURS SERVICE g. TURBOCHARGER ROTOR PLAY Contact your Komatsu distribu- tor for checking, or proceed as follows: h. TURBOCHARGER Excessive carbon or oil sludge ad- hering to turbocharger blower im- peller may lead to deterioration of normal charger performance, and possible damage. Have turbocharger cleaned by Komatsu distributor. 1. Remove the turbocharger oil filler pipe and drain pipe, then remove the intake air pipe connector and blower housing so that the blower impeller can be seen. 2. Using light oil as a cleaning agent, remove the carbon, sludge and other dirt from the blower impeller. Do not use a wire brush or other tool which may damage the impeller. 3.
Pour in light oil through the tur- bocharger oil filler and rotate the blower impeller several times to wash out the sludge. 4. Rotate the impeller by hand at least one turn at speed to check that there is contact noise or catching inside. If the impeller does not turn smoothly, contact your Komatsu distributor for repair or replacement. 5. If there is no abnormality, dry off the light oil with compressed air after inspection, then add engine oil. Remove air intake pipe from turbocharger. 1. Axial play Check axial play by moving rotor in axial direction. Play: Standard 0.08 - 0.18 mm 2.
Radial play Measure radial play by moving rotor holding both ends by hands in radial direction in parallel. Play: Standard 0.25 - 0.60 mm f If the rotor is excessively soiled with dust or carbon or if any oil leakage caused by turbocharger trouble is noted, have the tur- bocharger repaired by your Komatsu distributor. w-04311 - 101 -