Page 142 - Mechanic Diesel - TT

MECHANIC DIESEL - CITS

• Leakage in injector and cylinder head sealing
• Nozzle holes blocked/needle jammed/spray not working properly
• Air filter/exhaust system blocked
Knocking sound in engine

• Pump injection timing incorrect
• Pump phasing incorrect/ delivery not equal
• Pump delivery valve jammed/ spring broken
• Injector opening pressure too high

• Nozzle jammed in open position/ nozzle holder spring broken
• Nozzle hole blocked/ needle jammed/ spray not working properly
• Engine compression low/ engine seizing
• Valve sticky/ valve spring broken/ valve guide worn out
• Big end/ main bearings worn out

• Excessive carbon deposits in combustion chamber.
Excessive smoke
• Wrong pump injection timing
• Diesel equipment malfunctioning
• Pump delivery valve jammed/spring broken

• Full load/course of delivery too high
• Injection timer automatic advance wrong
• Nozzle position in cylinder head wrong and use of washers
• Injector opening pressure low
• Nozzle jammed in open position/nozzle holder spring broken

• Nozzle hole blocked/needle jammed/spray not correct
• Nozzle needle lift too high
• Air filter/exhaust system choked
• Engine compression low/engine seizure

Engine overheating
• Pump injection timing incorrect
• Full load/course of delivery excessive
• Nozzle holes clogged/needle jammed/spray not working properly
• Engine compression low/engine seizing
• Valve-sticky/valve spring broken/valve guide worn

• Excess carbon build-up in combustion chamber
• Cooling/lubrication system malfunctioning
Some Important Components of diesel fuel system & it’s position
• Bypass line

• Fuel return line
• Fuel filter

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CITS : Automotive - Mechanic Diesel - Lesson 31 - 38 CITS : Automotive - Mechanic Diesel - Lesson 31 - 38