Yanmar 6LY3 series Service Manual

TURBOCHARGER
Inspecting the Turbocharger
12/05
6LY3 Service Manual
9-15
© 2007 Yanmar Marine International
INSPECTING THE TURBOCHARGER
Before cleaning, carefully check the disassembled parts for any indication of seizure, wear, foreign matter or
carbon deposits. Correct the cause of the trouble at this point.
Inspecting Major Items
Cleaning the Turbocharger
When cleaning parts, keep the following points in mind.
Inspection Item Position to Be Checked
Carbon Deposits 1. Turbine rotor shaft turbine-side seal ring and the turbine housing backside.
2. Mounts for the bearing housing, the turbine housing and the bearing housing inside
wall.
Lubrication
(Wear, Seizure, Discoloration, etc.)
1. Turbine rotor shaft, floating bearings, thrust bushing and oil thrower.
2. Floating bearings and the thrust bushing.
3. Bearing housing and the inner periphery of the floating bearing retainer rings.
Oil Leaks 1. Turbine housing inside wall.
2. Outer periphery of the bearing housing and the turbine housing mount.
3. Turbine rotor shaft, turbine-side seal ring and the turbine rotor backside.
4. Compressor housing inside wall.
5. Compressor housing backside.
6. Seal plate surface and the seal ring insertion grooves.
Section Tools and Detergent Cleaning Procedure
Turbine Rotor Shaft Turbine rotor shaft tools:
1. Washing bucket (500 x 500)
2. Heat source: steam or gas burner
3. Brush
Detergent:
Carbon Solvent
1. Immerse the turbine shaft in the washing bucket
and heat the solution.
2. NEVER beat the turbine rotor to remove carbon
deposits.
3. Immerse the parts until dirt deposits become soft
by penetration of detergent.
4. When the deposits get soft, remove them using a
plastic bristle brush. NEVER use a wire brush for
cleaning
5. Protect the bearing surface of the turbine rotor
shaft and the seal ring groove from damage during
cleaning.
6. Incomplete cleaning will leave residual deposits
which may cause imbalance.
Turbine Housing Tools: Same as for cleaning the turbine rotor
shaft
Detergent: Same as for cleaning the turbine rotor
shaft
1. Apply cleaning fluid to heavily soiled parts of the
turbine housing.
2. Use a plastic scraper or a stiff natural bristle brush
to clean.
Compressor Housing Tools:
1. Washing bucket (500 x 500)
2. Brush
Detergent: Carbon Solvent
1. Immerse the parts until dirt deposits become soft.
2. When the deposits get soft, remove them using a
plastic bristle brush. NEVER use a wire brush.
Others Wash all the other parts with diesel fuel.
Clean the oil passages with compressed air.
When cleaning, avoid damaging the parts and allowing them to rust.

Yanmar 6LY3 series Specifications

General

Brand	Yanmar
Model	6LY3 series
Category	Engine
Language	English