Page 141 - Mechanic Diesel - TT

MECHANIC DIESEL - CITS

13 Reduced Downtime: Proactive maintenance reduces vehicle time for repairs.
14 Component Longevity: Increases servicing Reduces the life of individual components, the frequency of
replacement.
15 Operational Efficiency: Well-maintained fuel systems contribute to overall efficiency and productivity.
16 Manufacturer Recommendations: Adherence to manufacturer recommended maintenance schedules
ensures optimal performance and warranty compliance.

17 Personnel Safety: Properly maintained equipment contributes to a safe work environment for operators and
technicians.
18 Risk Reduction: Regular servicing reduces the risk of catastrophic failures that could lead to accidents or
injuries.
19 Customer Satisfaction: Reliable operation and reduced downtime lead to greater customer satisfaction with
vehicle performance.

20 Peace of mind: Vehicle owners and drivers have peace of mind knowing that the fuel system is well maintained.
Causes of failure of the diesel fuel system and its components
The diesel fuel system can fail due to following reasons.
Engine not running normally

• Filter insert choke closed
• Air in fuel system
• Looseness/blockage in accelerator leakage
• Injection timing incorrect
• Pump phasing incorrect/delivery not equal

• Pump control rod/gear worn out
• Leakage in high pressure pipe joints
• Blockage in high pressure pipe
• Diesel adulteration

• Nozzle hole blocked/needle jammed/spray not working properly
• Engine compression low/engine seizing
• Valve sticky/valve spring broken/valve guide worn out
Starting problems
• Blocked air vents in tank lid
• Blocked low pressure pipe

• Clogged filter inserts (choked)
• Overflow valve/leakage
• Air in fuel system
• Governor stop lever pulled

• Looseness/blockage in accelerator linkage
• Wrong pump injection timing
• More diesel equipment defective
• Worn fuel injection pump/feed pump parts
• Leakage in high pressure pipe joints

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CITS : Automotive - Mechanic Diesel - Lesson 31 - 38