Komatsu PC88MR-10 Shop Manual page 397

3) After finishing the adjustment, check the oil
pressure again according to the above
procedure.
3. Adjusting blade (RAISE) relief pressure
a If the blade (RAISE) relief pressure is
abnormal, adjust suction safety valve (blade)
(8) according to the following procedure.
Do not turn end cap (9) in a
counterclockwise more than once . More
turns may cause the cap to be jumped
out.
1) Loosen lock nut (10) of suction safety valve
(blade) (8) and turn end cap (9) to adjust the
pressure.
a Rotate the adjustment screw:
turned clockwise, the pressure is
increased.
turned counterclockwise, the pressure
is decreased.
a Quantity of adjustment per turn of
adjusting screw:
19.6 MPa {200 kg/cm
2) After finishing the adjustment, tighten lock
nut (10).
Lock nut:
39 to 49 Nm {4 to 5 kgm}
PC88MR-10
2 }
30 Testing and adjusting
3) After finishing the adjustment, check the oil
pressure again according to the above
procedure.
Hydraulic system
30-47