TURBOCHARGER
9-14
6LPA Service Manual
Turbocharger
© 2007 Yanmar Marine International
Inspection and Cleaning
Component Identification (RHE6W Turbocharger)
Cleaning
Before cleaning, visually check each part for any trace of damage, seizure, wear, foreign matter or carbon
deposits. Whenever the turbocharger is disassembled, always inspect all parts thoroughly for damage or
wear.
Component Inspection Before Cleaning
Condition
Order
Component
Carbon deposits
1
Turbine side seal ring of turbine shaft (Figure 9-2, (1)) and turbine wheel backside.
2
Mounting locations for bearing housing (Figure 9-2, (51)) and thermal insulation plate
(Figure 9-2, (42)) and inner wall of bearing housing.
Lubrication status
(wear, seizure,
discoloration, etc.)
1
Journal of turbine shaft (Figure 9-2, (1)), thrust bushing (Figure 9-2, (2)) and oil
thrower (Figure 9-2, (3)).
2
Floating bearing (Figure 9-2, (21)) and thrust bearing (Figure 9-2, (22)).
3
Internal circumference of bearing case and bearing housing (Figure 9-2, (51)).
Oil leakage
1
Inner wall of turbine housing (Figure 9-2, (41)).
2
Outer surface of bearing housing (Figure 9-2, (51)) and thermal insulation plate
(Figure 9-2, (42)) mounting area.
3
Turbine side seal ring (Figure 9-2, (6)) of turbine shaft (Figure 9-2, (1)) and turbine
wheel backside.
4
Inner wall of compressor housing (Figure 9-2, (31)).
5
Backside of compressor impeller (Figure 9-2, (8)).
6
Surface of seal plate (Figure 9-2, (11)) and seal ring (Figure 9-2, (4)) inserting area.
Cleaning Procedures
Part
Tools
Detergent
Procedure
Notes
Turbine
Shaft and
Housing
1. Wash Solvent
Tank
2. Heat Source
(Steam or
Gas Burner)
3. Plastic Brush
and Scraper
General carbon
removing agent
(Available
locally)
Immerse the turbine shaft in heated
wash solvent tank, until the carbon and
other deposits are softened.
Only use a plastic scraper to
remove carbon deposits. NEVER
use a wire brush.
NEVER strike the blades to
remove carbon deposits.
Avoid damaging the bearing
surface and seal ring groove of the
turbine shaft during cleaning.
Clean all carbon deposits from the
shaft. Deposits left on the turbine
shaft may cause vibration and
damage due to the shaft being out
of balance.
Blower
Impeller
Housing
1. Wash Solvent
Tank
2. Plastic Brush
and Scraper
General carbon
removing agent
(Available
locally)
Immerse in wash solvent tank until the
carbon and other deposits are softened.
Only use a plastic scraper to
remove carbon deposits. NEVER
use a wire brush.
All other
parts
-
Diesel Fuel
Clean all other parts with diesel oil.
Avoid damaging parts while
cleaning. Lightly coat parts with oil
to prevent corrosion until
assembled.
Clean all lubricating oil passages and
dry with compressed air.