Komatsu Galeo PC800-8 Shop Manual page 357

30 Testing and adjusting
a The front and rear swing motors are divided
from one spool. Adjust the valves in the fol-
lowing procedures.
a If swing starting power is not powerful, or if
swing speed is not fast:
1) Put match marks on the body and on adjust-
ment screw (16) for safety valves (14) and
(15) of each motor.
a The match marks are for returning the
screw and body to the original positions
after no fault is found.
2) Loosen locknut (17) of safety valve on one
side and tighten adjustment screw (16).
• Turn the adjustment screw to the right,
and the pressure will rise.
• Turn the adjustment screw to the left,
and the pressure will lower.
a Pressure adjusted by one turn of the ad-
justment screw :
3 Locknut :
Approx. 3.6 MPa {37 kg/cm
147 – 186 Nm {15 – 19 kgm}
3) Start the engine, relieve the swing lock, and
measure the relief oil pressure.
4) Rise of the oil pressure shows lowering of
the valve set pressure. Adjust the pressure
according to the criteria.
5) If the oil pressure is not changed, return the
valves to the original positions in accord-
ance with the match marks.
6) Adjust the relief valves on the other side in
the same steps 2) – 4) above.
7) After finishing adjustment, check the oil
pressure again according to the above
described measurement procedure.
PC800, 850-8
2
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SEN00788-02
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