Doosan PU158TI - Periodic Inspection and Maintenance; Revolving State and Inspection Points of Rotor; End Play Inspecting Points of Rotor; Axial Direction End Play

Maintenance of Major Components
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5.4.8. Periodic inspection and maintenance
The turbocharger assembly must be inspected periodically.
1) Revolving state and inspection points of rotor
Inspection on the revolving state of rotor is performed according to abnormal noises. In case of using
an acoustic bar, touch the turbocharger housing with a tip of bar and raise the engine revolution
slowly, Then, in case that high sound is heard by every 2 ~ 3 sec. continuously, for there should be
the possibility to be abnormal metal and rotor, replace or repair the turbocharger.
2) End play inspecting points of rotor
Disassemble the turbocharger from the engine and should inspect the end plays in axial and
circumference direction. In case of disassembling the turbocharger, the oil inlet and outlet should
necessarily be sealed with a tape.
a) Axial direction end play
z Wear limit : 0.20 mm
b) Rotor’s circumference direction end play
z Wear limit : 0.65 mm
c) In case that the end plays to axial and circumference directions, replace or repair the
turbocharger.
Magnet vise
Turbine wheel room
Dial gauge
Shift the
turbine shaft to
axial direction.
Wear limit : 0.20 mm
EFM3004I
EFM3005I
Dial indicator
Magnetic stand
Oil outlet
Oil inlet
Move turbine shaft
at both right and
left sides
simultaneously in
radial direction.