Diesel Engine General Fault And Troubleshooting; Start Failure Or Difficult Start Of Diesel Engine - Baudoulin 4M11G Maintenance Manual

Maintenance Manual of 4M11 Series Diesel Engine For Land Power Generators
 Comparison method: For some assemblies or parts, the replacement method is adopted to
determine the presence of malfunction.
Note:
1. Judging the malfunction cause of diesel engine is a really precise work. Before the
cause is basically identified, do not disassemble the diesel engine casually, or it will not only
eliminate the malfunction, but also lead to more serious malfunction due to improper
assembly after disassembly.
2. Inspection and maintenance on critical components such as high-pressure fuel pump
and turbocharger shall be performed by experienced personnel using special instruments. If
having no such experience or instruments, the customer shall not disassemble or adjust these
components.

3.2 Diesel Engine General Fault and Troubleshooting

3.2.1 Start Failure or Difficult Start of Diesel Engine

SN.
1 Malfunction in fuel system
1-1 Non-opened switch or no fuel of fuel tank
1-2 Air content in fuel system
1-3 No fuel supply of fuel delivery pump
1-4 Poor atomization of fuel injector
1-5 Wrong fuel supply advance angle
1-6 Blockage of fuel pipe or fuel filter
Insufficient compression
2
cylinder
Excessive wear of piston rings and cylinder
2-1
sleeves
2-2 Air leakage of valve
2-3 Air leakage of cylinder gasket
Cause
pressure of
Troubleshooting
Open switch or add sufficient fuel.
Check pipeline connectors for looseness and bleed air form
fuel line.
Check fuel delivery pump and replace disqualified one.
Adjust or overhaul fuel injector
Check and adjust fuel supply advance angle
Check and clean
Check valve clearances and valve airtightness and grind the
valves.
Check valve clearances and valve airtightness and grind the
valves.
Check cylinder gasket for presence of air leakage and solve
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