Hyundai HDFN25F, Руководство по эксплуатации и обслуживанию

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PROBLEM: LOW ENGINE POWER OUTPUT
Possible Cause Corrective Action
Clogged or faulty fuel
injector • Check and clean injection nozzles, being careful not to damage the orifice.
• Replace injection nozzle(s) if not working properly after cleaning.
Low compression
• Check valves for leakage – grind valves to correct.
• Check for bad valves, piston wear, ring damage or wear, or liner wear. Have parts
replaced.
Insufficient fuel flow • Check and service fuel system
Seizure of Moving parts
• Check for and repair leaks. Fill to correct oil level.
• Check for clogged oil filter and replace.
• Check oil pump and lubrication system.
• Check to see if engine bearing clearance is within specifications.
• Follow oil and filter service instructions to prevent future occurrences.
Incorrect fuel injection
timing
• Proper injection timing (crank angle before top dead center) : 18°
Improper valve clearance
• Check and adjust valve clearance when the engine is cold.
HB29D1, HB36D1 : intake 0.25mm, exhaust 0.30mm
Fuel injection Pump wear
• Check the injection pump and valve assembly. Replace as required.
• Poor quality fuel or improper fuels will accelerate injection pump wear.
• Adjust to proper injection pressure
HB29D1, HB36D1 : 150~160 kgf/cm 2
PROBLEM: EXHAUST SMOKE OR DARK EMISSIONS
Possible Cause Corrective Action
Fuel governor malfunction • Contact HLB CO., LTD . for repairs.
Poor quality fuel • Drain and replace with proper fuel. DIESEL ONLY
Faulty fuel injector • Clean or replace as required.
Incomplete fuel combustion
• Check injection timing, injection pump, valve adjustment and typical causes of low
compression. Make adjustment or repairs as needed.