Yanmar 3TNV82A Troubleshooting Manual page 227

Failure Diagnostic List
Defective start
Symptoms and conditions of failures
Starter not Starter
rotate rotates
Cause
Stopper solenoid fault
Fuel injection pump with injection
timing excessively advanced
Fuel injection pump with injection
timing excessively retarded
Incorrect fuel
Water entered into fuel system
Fuel filter clogged
Air entered into fuel system
Fuel pipe clogged, cracked
Insufficient fuel feeding to fuel injection
pump
Uneven injection quantity of fuel
injection pimp
Fuel injection quatity too much
Defective spray of fuel injection nozzle
Priming not available
Strainer at feed pump inlet clogged
Operation defect of CSD valve
Sealing defect of fuel tank
Air filter clogged
Engine operation at high temperature
or high land
Exhaust pipe clogged
TNV DI Service Manual
Engine stall Insufficient
Defective rotation control Noise/vibration
after start engine output
Exhaust
Without load At work Exhaust color
fume
Cooling
Lubricant Intake Exhaust Fuel
water
At work
FAILURE DIAGNOSTIC LIST
Electrics/electronics
Action
Inspection and replacement See "Stop Solenoid" (on page 7-9).
Inspection and adjustment See "Checking and Adjusting Fuel
Injection Timing" (on page 7-30).
Inspection and adjustment See "Checking and Adjusting Fuel
Injection Timing" (on page 7-30).
Usage of correct fuel See "Diesel Fuel Specifications" (on page
4-12).
Drainage of fuel filter See "Drain Fuel Filter / Water Separator"
(on page 5-24).
Cleaning or replacement See "Clean Fuel Filter / Water Separator"
(on page 5-34).
Bleeding See "Priming the Fuel System" (on page
4-15).
Cleaning or replacement
Check of fuel tank cock, fuel filter, fuel
pipe, fuel feed pump
Inspection and adjustment See "Testing of Fuel Injectors" (on page
7-38).
Inspection and adjustment See "Testing of Fuel Injectors" (on page
7-38).
Inspection and adjustment See "Testing of Fuel Injectors" (on page
7-38).
Valve in priming pump pinched dust See "Fuel System Components" (on page
(disassembled cleaning) 7-15).
Cleaning of strainer
Replacing the Pump
Replacement of CSD valve
Check of fuel tank and cap, as well as
installation of
genuine parts
Cleaning of air filter See "Clean Air Cleaner Element" (on
page 5-31).
Consideration of matching output
reduction with load
Cleaning of exhaust pipe
Referenced page number
1-225