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Engine Starting Failure

1. Engine is not under ‘START READY’ condition

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  • Check whether starting tried after ‘START READY’ lamp ‘ON’.
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  • Prepare for starting and reset.
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  • Check function of control system and governor.
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2. Flywheel does not rotate.

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  • No starting air noise from air motor when pressing ‘START’ button.
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  • Check valves for starting air supply line opened.
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  • Check function of solenoid valves on air motor.
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  • Starting air motor does not rotate.
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  • Check function of solenoid valves on air motor.
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  • Starting air motor rotate.
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  • Check pinion gear and ring gear
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  • Try starting again, if pinion gear engaging failed.
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  • Replace the gear, if broken.
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  • Check moving parts of engine inside
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  • Repair if bearing or piston seized.
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3. Flywheel rotate, but too slowly

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  • Check oil temperature. (Too high viscosity)
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  • Warm up the engine, if too low.
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  • Check starting air pressure and leakage.
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  • Charge air, if too low
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  • Repair, if leaked.
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  • Check engine under load.
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  • Release the load, if loaded. 
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4. No firing of cylinders.

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  • Check fuel oil circulating.
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  • Charge fuel tank, if empty.
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  • Clean or replace fuel oil filter element, if clogged
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  • Check if first starting after maintenance. (Incomplete air venting of fuel injection pump)
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  • Release starting fuel limiter and start again manually.
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  • Check movement of fuel rack, control shaft and governor lever.
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  • Press ‘Reset’ button, if fuel rack blocked by stop signal.
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  • Lubricate linkages, if stiff.
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  • Adjust the levers, if distorted.
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  • Check if fuel oil drained too much.
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  • Tightening of fuel high pressure block, if loosened.
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  • Check fuel injection valve by tester. (Opening pressure and Spray pattern)
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  • Adjust valve opening pressure, if changed.
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  • Clean nozzle, if clogged by heavy fuel oil.
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  • Replace, if needle sticked.
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  • Check fuel injection pump.
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  • Replace, if sticked or worn excessively.
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