Inspection And Cleaning - Yanmar 6LPA-STP2 Service Manual

TURBOCHARGER

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.
Condition
Carbon deposits
Lubrication status
(wear, seizure,
discoloration, etc.)
Oil leakage
Part Tools
1. Wash Solvent
Tank
Turbine 2. Heat Source
Shaft and (Steam or
Housing Gas Burner)
3. Plastic Brush
and Scraper
1. Wash Solvent
Blower
Tank
Impeller
2. Plastic Brush
Housing
and Scraper
All other
-
parts
9-14
Component Inspection Before Cleaning
Order
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.
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)).
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
Detergent
General carbon
Immerse the turbine shaft in heated
removing agent
wash solvent tank, until the carbon and
(Available
other deposits are softened.
locally)
General carbon
removing agent Immerse in wash solvent tank until the
(Available carbon and other deposits are softened.
locally)
Clean all other parts with diesel oil.
Diesel Fuel
Clean all lubricating oil passages and
dry with compressed air.
© 2007 Yanmar Marine International
Component
Procedure
6LPA Service Manual
Turbocharger
Notes
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.
Only use a plastic scraper to
remove carbon deposits. NEVER
use a wire brush.
Avoid damaging parts while
cleaning. Lightly coat parts with oil
to prevent corrosion until
assembled.