Yanmar 4LHA-HTP Operation Manual page 499

Chapter 4 Intake and Exhaust System
4. Turbocharger
(9) Measurement of turbine shaft play
See the inspection procedure in section 3.8.4.2.2 for
the measurement method.
If the turbine shaft play does not satisfy the standard,
reassembly is necessary since poor assembly or use
of a wrong part is conceivable.
1) Turbine shaft play in axial direction
Service standard:
2) Turbine shaft play in radial direction
Service standard:
4-8 Handling after Disassembly and Reassembly
When installing the turbocharger on the engine or
handling the turbocharger after installation, strictly
observe the instructions given below.
Especially pay full attention for preventing foreign
matter entrance into the turbocharger.
4 - 8 - 1 Instructions for turbocharger installation
(1) Lubrication path
1) Add new engine oil through the oil inlet port
before installation on the engine, and manually
turn the turbine shaft to lubricate the floating and
thrust bearings.
2) Flush the oil inlet pipe from the engine and outlet
pipe, and check for crushed pipe and dirt or
foreign matter remaining in the pipes.
3) Connect the pipes securely so as to ensure no oil
leak from joints.
(2) Intake path
1) Check the intake line for foreign matter or dirt.
2) Connect securely to prevent any air leak from
joints with the intake duct and air cleaner.
(3) Exhaust path
1) Check the exhaust system for dirt and foreign
matter.
2) Since heat resistant steel nuts and bolts are used
for the installation, do not use ordinary nuts and
bolts for other use. Always apply anti-seizure
agent on set nuts and bolts at tightening.
heat resistant bolts for the turbine housing.)
3) Connect exhaust pipes securely to prevent gas
leak from each pipe joint.
0.06 to 0.09 mm
0.10 to 0.17 mm
(Use
4-22
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