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109821_0508 27
Unstable engine running
Unstable low idling Too high low idling speed.
Incorrect control lever adjustment. Incorrect control lever adjustment.
Crack in injection pipe. Governor internal malfunction.
Injection nozzle failure.
Engine stop lever restricted at stop position.
Uneven compression pressure between cylinders
.
Engine hunting in medium speed range. Malfunction in engine at high speed range
.
Governor spring deteriorated. Insufficient fuel supply.
Air in the fuel system.
Clogged fuel filter element.
Uneven fuel injection amount
between plungers.
Deteriorated governor spring.
Incorrect valve clearance adjustment.
Deteriorated valve spring.
Engine speed will not slo
w
Engine control restriction or seizure.
Engine overheat.
Cooling system defect. Improper servicing.
Insufficient coolant amount.
Fan belt slippage. Engine over-loaded.
Thermostat malfunction. Air cleaner element clogging.
Radiator filler cap malfunction. Insufficient ventilation.
Cooling system internally fouled. Stopped coolant flo
w
Radiator clogging. (high concentration of antifreeze, etc.
)