Doosan DL06 - Page 52

DL06K Interim Tire-4 Diesel Engine Technical Information
50
Condition Causes Remedies
1) Starting difficult
(1) Starting motor trouble
(2) Fuel system trouble
(3) Compression pressure lack
Refer to diagnostics
Refer to diagnostics
● Valve's poor shut, stem distortion Repair or replace
● Valve spring damage Replace valve spring
● Cylinder head gasket's leak Replace gasket
● Wear of piston, piston ring or liner Adjust
2) Idle operation abnormal
● Injection timing incorrect Check by EDIA
● Air mixing at high pressure pump Remove air
3) Engine output insufficient
(1) Continuous output
insufficient.
● Valve clearance incorrect Adjust
● Valve tightness poor Repair
● Cylinder head gasket's leak Replace gasket
● Wear, stick, damage of piston ring Replace piston ring
● Injection timing incorrect Check
● Fuel injection amount insufficient Check
● Injector injection pressure improper
or stuck
● Supply pump's function lowered
● Fuel pipe system clogged
● Air suction amount insufficient
● Turbocharger poor
● Intercooler pipe air leak
Adjust or replace
Repair or replace
Repair
Clean or replace air cleaner
Repair or replace
Hose clamp adjust
(2) Output insufficient
when in acceleration
● Compression pressure insufficient Disassemble engine
● Injection timing incorrect Check
● Fuel injection amount insufficient Check
● Injector infection pressure, infection
angle improper
Repair, replace
● Supply pump's function lowered Repair or replace
● Air intake amount insufficient Clean or replace air cleaner
4) Overheating
● Engine oil insufficient or poor Replenish or replace
● Cooling water insufficient Replenish or replace
● Fan belt loosened, worn, damaged Adjust or replace
● Cooling water pump's function Repair or replace
● Water temperature regulator's operation
poor
Replace
● Valve clearance incorrect Adjust
● Exhaust system's resistance increased Clean or replace