Symptom Probable Cause Solution
• Not fuel Replenish fuel
• Air in the fuel system Vent air
• Water in the fuel system Change fuel and repair or flush
fuel system
• Fuel pipe clogged Clean
• Fuel filter clogged Clean or replace
• Excessively high viscosity of fuel or Use the specified fuel or engine
engine oil at low temperature oil
• Fuel with low cetane number Use the specified fuel
• Fuel leak due to loose injection Tighten nut
pipe retaining nut
• Incorrect injection timing Adjust
Engine Does • Fuel camshaft worn Replace
Not Start • Injection nozzle clogged Clean or replace
• Injection pump malfunctioning Repair or replace
• Fuel transfer pump malfunctioning Repair or replace
• Seizure transfer pump malfunctioning Repair or replace
piston, cylinder bore or bearing
• Compression leak from cylinder Replace head gasket, tighten
cylinder head screw
glow plug and nozzle holder
• Improper valve seating, valve Repair or replace
spring broken, valve seized
• Improper valve timing Correct or replace timing gear
• Piston ring and bore worn Repair or replace
• Excessive valve cleaner Adjust
• Battery discharged Charge
(Starter Does • Starter malfunction Repair or replace
Not Run) • Starter switch malfunction Repair or replace
• Wiring disconnected Connect
• Fuel filter clogged or dirt Clean or replace
• Air cleaner clogged Clean or replace
• Fuel leak due to loose injection pipe Tighten nut
Engine retaining nut
Revolution • Injection pump malfunctioning Repair or replace
is Not Smooth • Incorrect nozzle opening pressure Adjust
• Incorrect nozzle stuck or clogged Repair or replace
• Fuel over flow pipe clogged Clean
• Governor malfunctioning Repair
3. DISASSEMBLING AND SERVICING
3.1 TROUBLESHOOTING
ENGINE
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