Yanmar 4LHA-HTP Operation Manual page 490

Chapter 4 Intake and Exhaust System
4. Turbocharger
(4) Remove the seal plate
1) Loosen M8 TORX T screw bolt @ securing the
seal plate, using the torque wrench (TT40).
2) Remove seal plate © .
Note: Lightly tap the bearing housing side of the
seal plate by a wooden hammer.
Note: The liquid gasket is applied to the seal
plate and
surfaces.
3) Remove oil thrower ® from the seal plate.
(5) Remove the turbine housing
1) Remove M8 TORX T screw bolt @ using the
torque wrench (TT40).
2) Remove turbine housing @
(6) Pull off the turbine shaft
1) Lightly and manually secure heat insulation plate
@ancl pull off turbine shaft ® .
Note: If the turbine shaft is too tight, lightly tap
the shaft end on the blower side by a
wooden hammer.
2) Remove heat insulation plate @.
(7) Remove the thrust bearing and thrust bushing
1) Loosen M4 TORX T screw bolt % securing the
thrust bearing, using the screwdriver (TT20).
2) Remove thrust bearing @ and thrust bushing (5)
using a bar (copper).
(8) Remove the floating bearing
1) Remove floating bearing <g) on the compressor
side from bearing housing®.
2) Remove retaining ring H o n the turbine side from
bearing housing®, using the retaining ring pliers.
3) Remove floating bearing @ on the turbine side
from bearing housing®.
4) Remove far-side retaining rings ® of turbine and
compressor sides from bearing housing®, using
the retaining ring pliers.
(9) Remove the seal ring
1) Remove seal ring © on the turbine side from
turbine shaft © .
2) Remove seal ring ® on the compressor side
from oil thrower (D.
bearing wheel mounting
4-13
4LHA Serie