Komatsu Galeo PC800-8 Shop Manual page 355

30 Testing and adjusting
3 Locknut:
5) Fix holder (9) and tighten locknut (10).
93 – 123 Nm {9.5 – 12.5 kgm}
a If the high-pressure setting side is ad-
justed, the low-pressure setting side
changes. Accordingly, adjust the low-
pressure setting side, too.
6) Fix elbow (8) and tighten locknut (7).
7) Connect hose (6).
8) After finishing adjustment, check the oil
pressure again according to the above
described measurement procedure.
PC800, 850-8
2. Adjusting main relief valve (low-pressure set-
ting) of left 5-spool control valve
a If the work equipment oil pressure in the front
pump circuit (during normal relief operation)
is abnormal or the high-pressure setting side
was adjusted, adjust the low-pressure set-
ting side of main relief valve (5) of the left 5-
spool control valve according to the following
procedure.
a The low-pressure setting is the state in which
the 2-stage relief solenoid valve is turned
OFF and the pilot pressure is not applied to
the changeover port.
1) Disconnect hose (6).
2) Loosen locknut (7) and set elbow (8) free.
3) Fix union (11) with a spanner and loosen
locknut (12).
4) Turn union (11) to adjust the pressure.
a If the union is
• turned to the right, the pressure rises.
• turned to the left, the pressure lowers.
a Pressure changed by 1 turn of union:
5) Fix union (11) with a spanner and tighten
3 Locknut:
locknut (12).
6) Fix elbow (8) with a spanner and tighten
locknut (7).
7) Connect hose (6).
8) After finishing adjustment, check the oil
pressure again according to the above
described measurement procedure.
SEN00788-02
21.8 MPa {209 kg/cm
78 – 93 Nm {8.0 – 9.5 kgm}
}
2
7