Doosan D1146T - Causes and Remedies

7.3. Causes and Remedies
- 60 -
Condition Causes Remedies
1) Starting difficult
•
Valve’s poor shut, stem distortion Repair or replace
(1)
Compression pressure
•
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 Adjust
•
Air mixing at injection pump Remove air
3) Engine output insufficient
•
Valve clearance incorrect insufficient Adjust
(1) Continuous output
•
Valve tightness poor Repair
•
Cylinder head gasket’s leak Replace gasket
•
Wear, stick, damage of piston ring Replace piston ring
•
Injection timing incorrect Adjust
•
Fuel injection amount insufficient Adjust injection pump
•
Nozzle injection pressure Adjust or replace
improper or stuck
•
Supply pump’s function lowered Repair or replace
•
Fuel pipe system clogged Repair
•
Air suction amount insufficient Clean or replace air
cleaner
•
Supercharger poor Repair or replace
(2) Output insufficient
•
Compression pressure insufficient Disassemble engine
when in acceleration
•
Injection timing incorrect Adjust
•
Fuel injection amount insufficient Adjust injection pump
•
Injection pump timer’s Repair or replace
function insufficient
•
Nozzle infection pressure, Repair, replace
infection angle improper
•
Supply pump’s function lowered Repair or replace
•
Air intake amount insufficient Clean or
replace air cleaner