KNEGT 254G2, Руководство пользователя

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62
Chapter
Ⅴ
Troubles and Trouble-Shooting
5.1 Engine
5.1.1
Diesel engine fails to start
a. Breakdowns of fuel system
Possible causes Fixing methods

No fuel in fuel tank

Air in fuel system

Blockage of fuel system

Plunger and barrel of injection
pump worn-out

Seizing of injector or bad
atomization

Add fuel

Bleed air, find out the reason and fix it up

Replace the fuel filter element with new
one and check the fuel delivery pipe

Replace with a new one

Replace with a new one or grind it
b. Insufficient compression pressure
Possible causes Fixing methods

Insufficient valve clearance or
maladjustment of the
decompression screw

Leakage of valve

Leakage of cylinder head gasket

Wear and tear, sticking or gap
lapping of piston rings

Adjust as per regulations

Replace with new one or grind it

Replace with a new gasket and fasten
cylinder head nuts according to regulations

Replace the damaged ones, clean the
sticking ones or reassemble them
c. Other causes
Possible causes Fixing methods

Incorrect advance angle of fuel
and valve timing after
reassembling

Low ambient temperature

Wrong lube oil

Water being in cylinder

Readjust them

Use air heater or fill hot water into the
radiator for preheating

Use the engine lube oil as regulated

Check and fix break downs
5.1.2 Non oil pressure or abnormal oil pressure
a. Not or too low the oil pressure
Possible causes Fixing methods

Too low the oil level

Oil suction pipe NOT submerged
in lube oil so air comes in the
pipe

Paper gasket of oil filter is
assembled in a reversed way or
broken

Replenish

Reassemble and check whether it is
broken

Reassemble or replace it