Yanmar 4LHA-HTP Operation Manual page 496

Chapter 4 Intake and Exhaust System
4. Turbocharger
4 - 7 Reassembly Procedure
4-7-1 Preparation for reassembly
(1) Prepare tools
Prepare general tools, special tools, liquid gasket
(Three Bond No.1207) and LOCTITE No.242
before reassembling the turbocharger.
(2) Replace the parts
Always replace the following parts with new ones:
Turbine side seal ring ©
Compressor side seal ring © (1 pc.)
M4 pan head small screw @
M8 pan head small screw @
4-7-2 Reassembly
(1) Installation of floating bearing
1) Install retaining rings @ to bearing housing @
using the retaining ring pliers.
2) Install the turbine side floating bearing @ to
bearing housing®.
3) Install the turbine side retaining ring © t o bearing
housing® using the retaining ring pliers.
4) Install the compressor side floating bearing® to
bearing housing®
l— [NOTICE]
The rounded surface of retaining ring faces
to the bearing.
Apply engine oil to the floating bearing
before reassembly.
(2) Installation of turbine shaft
1) Rt seal ring © onto turbine shaft © .
2) Install thermal insulation plate © to bearing
housing® on the turbine side.
3) Apply engine oil to the journal portion of the
turbine shaft and insert the shaft from the turbine
side of bearing housing®
r- [NOTICE]
Pay sufficient attention so as not to damage
the floating bearing by the turbine shaft.
Position the seal ring end on the lube oil inlet
side after centering with the turbine shaft.
(1 pc.)
(3 pes.)
(4 pes.)
4-19
4LHA Serii