Doosan GL08K - Page 183

Maintenance of Major Components - 177 -
5.5.7. Diagnostics and troubleshooting
Complaints Possible causes
Corrections
1. Engine overheating  Air cleaner element clogged  Replace or clean
 Restrictions in air duct  Check and correct
 Leakage at intake manifold  Check and correct
 Turbocharger seized up and not rotating  Disassemble/repair or replace
 Turbine blades and compressor blades
coming in contact with each other or
damaged
 Disassemble/repair or replace
 Exhaust piping deformed or clogged  Check and correct
2. Engine overcooling
 Oil leak into turbine and compressor  Disassemble/repair or replace
 Worn or damaged seal ring due to
excessive wear of bearing
 Disassemble/repair or replace
3. Lack of coolant
 Gas leak at each part of exhaust system  Check and correct
 Air cleaner element restricted  Replace or clean
 Turbocharger fouled or damaged  Disassemble/repair or replace
 Leakage at discharge port on
compressor side
 Check and correct
4. Cooling system noisy
 Rotor assembly coming in contact  Disassemble/repair or replace
 Unbalanced rotation of rotor  Disassemble/repair or replace
 Seized up  Disassemble/repair or replace
 Each joint loosened  Check and correct