Page 150 - Mechanic Diesel - TT
P. 150
MECHANIC DIESEL - CITS
Looseness/disruption in accelerator linkage Correct the faults after seeing them.
Pump injection timing wrong Replace or repair faulty equipment
More diesel equipment malfunctions Stop leakage
Wear of fuel injection pump/feed pump parts Repair or replace
Leakage in joints of high pressure pipes Clean the seat and replace the washer
Leakage in sealing of injector and cylinder Clean the filter and remove any defects
Nozzle holes clogged/needle jammed/spray not Clean the hole and replace the nozzle
working properly
Air filter/exhaust system clogged Overhaul the engine
Low engine compression/engine seizure Battery weak/starter malfunction
Valve sticky/valve spring broken/valve guide worn Replace defective parts.
Common faults– knocking sound in engine
Causes Remedy
Pump injection timing wrong Reset the timing
Incorrect pump phasing/uneven delivery Perform pump phasing calibration
Jamming of pump delivery valve/breakage of Clean delivery valve/replace spring
spring.
Injector opening pressure is high Adjust injector pressure
Nozzle jammed in open position/nozzle holder Replace nozzle, replace spring
spring broken
Clogged nozzle hole / jammed needle / spray not Clean the nozzle
working properly
Low engine compression/engine seizure Overhaul the engine.
Valve sticky/valve spring broken/valve guide worn Open valve and replace spring and guide
Wear of big end/main bearings/excessive force on Do engine overhauling.
the crankshaft
Excess carbon deposits in the combustion Decarbonize.
chamber
adulteration in diesel Add good diesel of right grade
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CITS : Automotive - Mechanic Diesel - Lesson 31 - 38 CITS : Automotive - Mechanic Diesel - Lesson 31 - 38
