Doosan DV11 - Engine Inspection

DV11
Operation and Maintenance
49
Technical Information
Printed in Mar. 2005 PS-MMA0608-E1A
Condition Causes Remedies
1) Starting difficult
(1) Starting motor trouble z Refer to diagnostics
(2) Fuel system trouble z Refer to diagnostics
z Valve's poor shut, stem
distortion
Repair or replace
z Valve spring damage Replace valve spring
z Cylinder head gasket's leak Replace gasket
(3) Compression pressure lack
z Wear of piston, piston ring
or liner
Adjust
z Injection timing incorrect Check by SCAN-200
2) Idle operation abnormal
z Air mixing at high pressure
pump
Remove air
3) Engine output insufficient
z Valve clearance incorrect Adjust
z Valve tightness poor Repair
z Cylinder head gasket's leak Replace gasket
z Wear, stick, damage of
piston ring
Replace piston ring
z Injection timing incorrect Check
z Fuel injection amount
insufficient
Check injector
z Injector injection pressure
improper or stuck
Adjust or replace
z Supply pump's function
lowered
Repair or replace
z Fuel pipe system clogged Repair
z Air suction amount
insufficient
Clean or replace air
cleaner
(1) Continuous output
insufficient
z Turbocharger poor Repair or replace
z Compression pressure
insufficient
Disassemble engine
z Injection timing incorrect Check
z Fuel injection amount
insufficient
Check
z Injector infection pressure,
infection angle improper
Repair, replace
z Supply pump's function
lowered
Repair or replace
(2) Output insufficient
when in acceleration
z Air intake amount
insufficient
Clean or
replace air cleaner
z Engine oil insufficient or
poor
Replenish or replace
z Cooling water insufficient Replenish or replace
z Fan belt loosened, worn,
damaged
Adjust or replace
z Cooling water pump's
function lowered
Repair or replace
z Water temperature
regulator's operation poor
Replace
z Valve clearance incorrect Adjust
4) Overheating
z Exhaust system's resistance
increased
Clean or replace