Komatsu Galeo BR380JG-1E0 Shop Manual page 285

30 Testing and adjusting
Adjusting
a The unload valve cannot be adjusted.
1. Adjusting main relief pressure (Travel)
a If the main relief pressure is abnormal,
adjust main relief valves (3) and (4)
according to the following procedure.
(3): Rear (R) main relief valve
q
(4): Front (F) main relief valve
q
1) While fixing adjustment screw (5), loosen
locknut (6).
2) Turn adjustment screw (5) to adjust the
set pressure.
a If the adjustment screw is
Turned to the right, the set pres-
q
sure is increased.
Turned to the left, the set pres-
q
sure is decreased.
a Quantity of adjustment per turn of
adjustment screw:
Approx. 12.6 MPa {Approx. 128 kg/cm
3) While fixing adjustment screw (5), tighten
locknut (6).
3
Locknut:
4) After finishing adjustment, check again that
the oil pressure is normal according to the
above described measurement procedure.
BR380JG-1E0
29.4 – 39.2 Nm {3 – 4 kgm}
2. Adjusting work equipment safety valves
a If the work equipment safety valves are
abnormal, adjust safety valves (7), (8),
(10) and (11) of the work equipment
according to the following procedure.
(7) : Motor for magnetic separator
q
(8) : For side conveyor motor
q
(10) : For feeder motor
q
(11) : For resetting lock cylinder
q
1) Loosen locknut (12).
Turn adjustment nut (13) to adjust the
pressure.
a If the adjustment nut is
q
q
a Quantity of adjustment per turn of
adjustment nut:
Approx. 25.3 MPa {Approx. 258 kg/cm
2) While fixing adjustment nut (13), tighten
2
}
locknut (12).
3
SEN02303-00
Turned to the right, the set pres-
sure is increased.
Turned to the left, the set pres-
sure is decreased.
Locknut:
39 – 49 Nm {4 – 5 kgm}
2
}
27