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022-00029AE Operation and Maintenance Manual
Troubleshooting 6-1
6
TROUBLESHOOTING
ENGINE
Problem
Possible Causes
Remedies
Starter does not operate
Blown fuse
Replace fuse
Low battery power
Charge battery
Poor terminal contact
Clean and tighten connections
Starter switch failed
Replace switch
Starter relay failed
Replace relay
Starter control failed
Replace controller
Wiring harness faulty
Replace harness
Battery relay failed
Replace relay
Starter engages, engine does
not start
Blown fuse
Replace fuse
Fuel gelled in cold weather
Replace fuel
Fuel filters plugged
Replace filters
Water or dirt in fuel system
Clean system and add new fuel
Air in fuel system
Purge air from system
Engine stop control failed
Replace stop control
Engine stop relay failed
Replace relay
Engine starts, runs only at low
speed or shuts down
Engine oil viscosity incorrect
Change oil
Clogged or dirty fuel injectors
Clean injectors
Fuel filters plugged
Replace filters
Engine stop motor cable out of
adjustment
Readjust
Engine speed control cable out
of adjustment
Readjust
Engine knocks, runs unevenly or
surges
Low engine oil
Refill
Plugged air intake system
Clean system and replace filter
Injection pump out of adjustment
Contact your
DOOSAN
dealer
Plugged fuel filter
Replace fuel filter
Water or dirt in fuel system
Clean system and add new fuel
Clogged or dirty fuel injectors
Clean injectors