Komatsu 114E-3 Series Shop Manual page 132

SEN00455-01
2) Connect M10 computer check fitting G4 to
fuel vacuum gauge G5.
3) Run the engine at high idle and test the
fuel negative pressure circuit pressure.
a If the fuel negative pressure circuit
pressure is in the following range, it is
normal.
Standard value of fuel negative pres-
q
sure circuit pressure (supply pump):
Max. 33.9 kPa {Max. 254 mmHg}
4) After finishing testing, remove the testing
tools and return the removed parts.
3
Fuel pressure pickup plug:
3. Testing fuel low-pressure circuit pressure
(fuel filter inlet side)
1) Remove fuel pressure pickup plug (3)
from the fuel main filter inlet side.
14
20 – 22 Nm {2.0 – 2.2 kgm}
30 Testing and adjusting
2) Install adapter G2 and nipple [1] of
hydraulic tester G1 and connect it to
gauge G3.
3) Measure fuel low-pressure circuit pres-
sure when cranking the engine.
a If the fuel low-pressure circuit pres-
sure (at the fuel filter inlet side) is in
the following range, it is normal.
Standard value of fuel low-pressure
q
circuit pressure (fuel filter inlet side):
Min. 0.14 MPa {Min. 1.4 kg/cm
k
To protect the starting motor, do
not continuously crank the engine
more than 30 seconds.
4) After finishing testing, remove the testing
tools and return the removed parts.
3
Fuel pressure pickup plug:
20 – 22 Nm {2.0 – 2.2 kgm}
2 }
114E-3 Series