Failure Diagnosis - Doosan DP158L Series Operation & Maintenance Manual

Failure Diagnosis

Phenomenon
Rotating part is contacted
Unbalanced rotation of a rotor
Burn
Loose joint
Deformed or damaged intake systemhose
Poor clamping state
Contaminated or damaged air filter
Leakage of coolant from the turbocharger or oil from the
oil hose
Leakage of gas from the exhaust manifold
Noise or vibration
Poor turbo actuator operation
Leakage from the engine block and the exhaust mani-
fold
Contaminated blowby gas and abnormal oil amount
Large gap of the turbocharger wheel, causing interfer-
ence with the wall
Damaged turbocharger wheel
Damaged wheel and shaft of the turbocharger
Poor rotating force of the turbocharger wheel
Causes
141
9. Intake/exhaust system
Troubleshooting
Repair or replace it
Repair or replace it
Repair or replace it
Check or repair it
Replace it
Adjust and tighten the clamp
Replace and check if the impeller of the turbo-
charger is damaged
Replace the hose and the gasket
Replace the gasket or tighten the fixing nut
Replace the turbocharger
Check the engine
Check the turbo impeller and the turbo intake
outlet
Check if there is any sand or metallic foreign
substance
Check if there is any sand or metallic foreign
substance
Check if there is any sand or metallic foreign
substance
Check if there is any sand or metallic foreign
substance