Doosan HP900, Operation & Maintenance Manual

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Fault Finding Operating & Maintenance Manual
Book: 22846471 (3-09-07) Rev. B 79
Engine starts but
will not run or
engine shuts down
prematurely. Electrical fault. Test the electrical circuits.
Low engine oil pressure. Check the oil level and oil filter(s).
Safety shut-down
system in operation. Check the safety shut-down switches.
Fuel starvation. Check the fuel level and fuel system
components. Replace the fuel filter if
necessary.
Switch failure. Test the switches.
High compressor oil
temperature. Check the compressor oil level and oil
cooler. Check the fan drive.
Water present in fuel
system. Check the water separator and clean if
required.
Faulty relay. Check the relay in the holder and replace if
necessary.
Engine Overheats. Low water level Check the level and replenish if necessary.
Blocked radiator. Stop the machine and clean the cooling fins
with compressed air or steam. Use reduced
pressure for cleaning the fins.
Reduced cooling air
from fan. Check the fan and the drive belts. Check for
any obstruction inside the cowl.
Faulty thermostat Check the thermostat and replace if
necessary.
Engine speed too
low. Blocked fuel filter. Check and replace if necessary.
Blocked air filter. Check and replace the element if necessary.
Faulty regulator valve. Check the regulation system.
Premature unloading. Check the regulation and the operation of the
air cylinder.
Excessive vibration. Engine speed too low. See “Engine speed too low”
Leaking oil seal. Improperly fitted oil seal. Replace the oil seal.
Refer also to the Engine Manufacturer’s Manual.
FAULT CAUSE REMEDY
Book:46623600 (10-12-2012) Rev. A