Komatsu 114E-3 Series Shop Manual page 133

30 Testing and adjusting
4. Testing fuel low-pressure circuit pressure
(fuel filter outlet side)
1) Remove fuel pressure pickup plug (4)
from the fuel main filter outlet side.
2) Install adapter G2 and nipple [1] of
hydraulic tester G1 and connect it to
gauge G3.
3) Run the engine at high idle and measure
the fuel low-pressure circuit pressure.
a If the fuel low-pressure circuit pres-
sure (at the fuel filter outlet side) is in
the following range, it is normal.
Standard value of fuel low-pressure
q
circuit pressure (fuel filter outlet side):
Min. 0.48 MPa {Min. 4.9 kg/cm
114E-3 Series
4) After finishing testing, remove the testing
tools and return the removed parts.
3
5. Testing difference of pressure in front and
rear part of fuel filter
1) Remove fuel pressure pickup plug (3)
from the fuel main filter inlet side and fuel
pressure pickup plug (4) from the outlet
side.
2) Install adapter G2 and nipple [1] of
hydraulic tester G1 and connect it to
gauge G3.
2
} 3) Run the engine at high idle and measure
the difference of pressure in front and rear
part of fuel filter.
Drop of fuel low-pressure circuit pres-
q
sure =
Fuel filter inlet pressure – Fuel filter
outlet pressure
a If the drop of fuel low-pressure circuit
pressure is in the following range, it is
normal.
Standard value of drop of fuel low-
q
pressure circuit pressure:
SEN00455-01
Fuel pressure pickup plug:
20 – 22 Nm {2.0 – 2.2 kgm}
Max. 0.14 MPa {Max. 1.4 kg/cm
2
}
15