Komatsu Galeo BR380JG-1E0 Shop Manual page 294

SEN02303-00
3. Measuring LS-EPC valve output pressure
1) Remove oil pressure pickup plug (5).
2) Install nipple M2 and connect it to oil pres-
sure gauge of hydraulic tester M1.
a Use the oil pressure gauges of 5.9
MPa {60 kg/cm
3) Start the engine.
4) Run the engine at high idle, Turn OFF all
the work equipment switches, and mea-
sure the output pressure.
a Measuring condition and method of
judgment: If the output pressures are
in the following range, the LS-EPC
valve is normal.
All work equipment
switches
OFF
5) After finishing measurement, remove the
measuring tools and return the removed
parts.
36
2
}.
Output pressure
Approx. 2.9 MPa
{Approx. 30 kg/cm 2 }
Adjusting
Adjusting LS valve
a If the LS differential pressure is abnormal,
adjust the LS valve according to the following
procedure.
(6): Front pump LS valve
q
(7): Rear pump LS valve
q
1. While fixing adjustment screw (9), loosen lock-
nut (8).
2. Turn adjustment screw (9) to adjust the differ-
ential pressure.
a If the adjustment screw is
Turned to the right, the differential
q
pressure is increased.
Turned to the left, the differential
q
pressure is decreased.
a Quantity of adjustment (LS differential
pressure) per turn of adjustment screw:
Approx. 1.3 MPa {Approx. 13.3 kg/cm
3. While fixing adjustment screw (9), tighten lock-
nut (8).
3
Locknut: 49 – 68.6 Nm {5 – 7 kgm}
4. After finishing adjustment, check again that the
LS differential pressure is normal according to
the above described measurement procedure.
30 Testing and adjusting
BR380JG-1E0
2
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