Komatsu SAA6D114E-3 - Code [559;CA559] Rail Press Low Error

SEN00460-01 40 Troubleshooting
30 114E-3 Series
E-43 Code [559/CA559] Rail Press Low Error 1
Error code Failure code
Trouble
No-pressure feed by supply pump 1
(Engine controller system)
559 CA559
Contents of
trouble
• No-pressure feed (1) occurred in common rail circuit.
Action of con-
troller
• None in particular.
Problem that
appears on
machine
• Engine does not start or starting performance is poor
• Exhaust smoke is black.
• Engine output drops.
Related infor-
mation
• Method of reproducing failure code: Start engine.
Possible causes
and standard
value in normal
state
Causes Standard value in normal state/Remarks on troubleshooting
1 Fuel leakage to outside
Inspect for fuel leakage directly (visual inspection at engine low
idle).
2
Defective low-pressure circuit
device
a For check of pressure in fuel low-pressure circuit, see Testing and
adjusting, “Testing fuel pressure.”
• Measure pressure at the fuel filter inlet side.
• Cranking speed: Min. 150 rpm
Pressure in fuel low-
pressure circuit
Cranking
Min. 0.14 MPa
{Min. 1.4 kg/cm
2
}
a For check of pressure in fuel low-pressure circuit, see Testing and
adjusting, “Testing fuel pressure.”
• Measure at fuel filter outlet side.
Pressure in fuel low-
pressure circuit
At high idle
Min. 0.48 MPa
{Min. 4.9 kg/cm
2
}
a For check of pressure in fuel low-pressure circuit, see Testing and
adjusting, “Testing fuel pressure.”
• Measure at fuel filter inlet and outlet sides.
• Difference of pressure in front and rear part of filter = Fuel filter
inlet pressure – Fuel filter outlet pressure
Difference of pressure in
front and rear part of filter
At high idle
Max. 0.14 MPa
{Max. 1.4 kg/cm
2
}
a For check of fuel suction pressure, see Testing and adjusting,
“Testing fuel pressure.”
• Measure at gear pump fuel inlet side of supply pump.
Fuel suction circuit pres-
sure (Gear pump side)
At high idle
Max. 33.9 kPa
{Max. 254 mmHg}
a For check of fuel suction pressure, see Testing and adjusting,
“Testing fuel pressure.”
• Measure at fuel connector side.
Fuel suction circuit pres-
sure (Fuel connector
side)
At high idle
Max. 27.1 kPa
{Max. 203 mmHg}
3
Defective injector (High-pres-
sure piping in head included)
a For testing of return rate from injector, see Testing and adjusting,
“Testing leakage from pressure limiter and return rate from injec-
tor.”
Return rate from injector
Cranking (When
engine cannot be
started)
Max. 100 cc/
30 sec.
At low idle (When
engine can be
started)
Max. 300 cc/
45 sec.