Yanmar 4LHA-HTP Operation Manual page 487

Chapter 4 Intake and Exhaust System
4. Turbocharger
(2) Inspection of turbine shaft play
Remove the turbocharger from the engine and inspect the turbine shaft play in the axial and radial
directions according to the procedures below.
After removing the turbocharger from the engine, always blind the oil inlet and outlet ports with
gummed tape.
1) Turbine shaft play in axial direction
Dial indicator
Service standard
Wear limit
2) Turbine shaft play in radial direction
Magnet base
Service standard : 0.10 to 0.17 mm
Wear limit : 0.205 mm
Magnet base
0
rvr
tei
0.06 to 0.09 mm
0.11 mm
(Play in axial direction)
(Play in radial direction)
4-10
Turbine wheel chamber
* •
fa
Dial indicator
4LHA Seriesi
Move the turbine
shaft in the axial
direction.
Move the turbine
shaft in the radial
direction at the
same time on the
left and right sides.