6-2 Troubleshooting
022-00029AE Operation and Maintenance Manual
Engine has poor power
Plugged air intake system
Clean system and replace filter
Clogged or dirty fuel injectors
Clean injectors
Fuel filters plugged
Replace filters
Engine speed control cable out
of adjustment
Readjust
Injection pump out of adjustment
Contact your
DOOSAN
dealer
Valve backlash faulty
Adjust backlash
Engine runs hot
Low coolant level
Add coolant
Thermostat faulty
Replace thermostat
Radiator cap faulty
Replace radiator cap
Radiator core plugged
Clean radiator
Oil cooler core plugged
Clean oil cooler
Fan belt loose or damaged
Tighten or replace as required
Temperature sensor faulty
Replace sensor
Engine oil pressure warning light
turns "ON," and buzzer sounds
Low engine oil level
Add oil
Wrong grade oil for weather
conditions
change oil
Clogging oil filter element
Change filter and oil
Defective alarm switch
Contact your
DOOSAN
dealer
Oil leakage from pipe or joint
Clogging suction strainer
Excessive engine wear
Defective oil pump
Coolant temp, warning light
turns "ON."
Low engine coolant level
Add coolant
Loose/slipping/broken fan belt
Adjust or replace belt
Clogging radiator fins
Clean
Scale or mineral build up inside
radiator
Flush or professionally clean
Defective alarm switch (gauge is
in green)
Contact your
DOOSAN
dealer
Low water pump flow
Thermostat stuck or missing
Problem
Possible Causes
Remedies