Doosan DX22 - Check Items During Turbocharger Disassembly and Assembly

9. Intake/Exhaust System
131
Check Items During Turbocharger Disassembly and Assembly
No. Check Items
Reason
Troubleshooting
Noise
Power
Drop
Oil
Leak
Oil
Cons.
Black/White
Exhaust Smoke
Blue
Exhaust Smoke
Before removal
1
Are any hoses in the intake system torn or
deformed?
o o o o Replace the hose
2 Are clamps tightened properly? o o o o
Retighten the bolts and
nuts
3 Is the air filter in good condition? o o o o
Replace the air filter
Check the turbocharger
impeller for damage
4
Are there any leaks in the turbocharger
coolant or oil hoses?
o ooo
Replace the hose and
gasket
5
Is gas leaking from the exhaust manifold
gasket?
o
Replace the nuts and
gasket
6
Is the turbocharger actuator operating
normally?
o o o o Replace the turbocharger
During removal
1
Are there any traces of leaks between the
engine block and exhaust manifold?
o o o o o Check the engine
2
Is there any foreign matter in the blow-by gas?
Is the oil level normal?
o oooo
Check the turbo impeller
and turbo intake outlet
3
Are there any traces of interference with the
wall due to excessive free play of the wheel?
o oooo
Check for foreign matter
(Sand, metallic matter)
4 Is the wheel damaged? o o o o o
Check for foreign matter
(Sand, metallic matter)
After removal
1 Is the wheel damaged or is the shaft split? o o o o o
Check for foreign matter
(Sand, metallic matter)
2 Is the wheel rotating properly? o o o o o