Komatsu PC500LC-10R Shop Manual page 479

30 TESTING AND ADJUSTING
2.
Loosen the lock nut (13) with the holder (12) fixed.
3.
Turn the holder (12) to adjust the pressure.
REMARK
• The pressure is increased as the holder (12) is turned
to the right. The pressure is decreased as it is turned to
the left.
• Quantity of pressure adjustment per turn of holder: Ap-
proximately 25.3 MPa {258 kg/cm
4.
Tighten the lock nut (13) with the holder (12) fixed.
3
Lock nut (13):
78 to 93 Nm {8.0 to 9.5 kgm}
5.
Connect the pilot hose (9).
After the adjustment, recheck the oil pressure according to the testing procedure previously described.
METHOD FOR ADJUSTING SWING RELIEF PRESSURE
Adjust the swing 2-stage relief valve (14) according to the fol-
lowing procedure when the swing relief pressure is not normal.
1.
Disconnect pilot hose (15).
2.
Loosen the lock nut (17) with the holder (16) fixed.
3.
Turn the holder (16) to adjust the pressure.
REMARK
• The pressure is increased as the holder is turned to the
right. The pressure is decreased as it is turned to the
left.
• Quantity of pressure adjustment per turn of hold-
er4.7 MPa {47.9 kg/cm
4.
Tighten the lock nut (17) with the holder (16) fixed.
3
Lock nut (17):
93.1 to 122.5 Nm {9.5 to 12.5 kgm}
5.
Connect the pilot hose (15).
After the adjustment, recheck the oil pressure according to the testing procedure previously described.
PC500LC-10R
TEST AND ADJUST OIL PRESSURE IN WORK EQUIPMENT, SWING,
2
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2
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AND TRAVEL CIRCUITS
30-73