3-32 SHB 28Z3 EN – Edition 2.0 * 28z3s312.fm
Maintenance
Checking pilot control pressure
Checking pilot control pressure
☞ Connect a pressure gauge to measuring port MP 4 38/4
☞ Move the control lever base (safety switch) to work position
☞ Check and make a note of the pressure value.
Adjusting pressure reducing valve 4 (PRV 4)
☞ Adjust the pressure at the pressure reducing valve 4 (PLV4) 39/D at the pilot oil sup-
ply unit
☞ Check the pilot control pressure again once adjustment is over
Fig. 38: Pilot control pressure measuring port
4
Fig. 39: Pressure reducing valve
D
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