Komatsu PC88MR-10 Shop Manual page 291

PPC oil pressure switch
a PPC: Abbreviation for Proportional Pressure Control
1. Plug
2. Switch
3. Connector
Specifications
(PC220-E610-030-P-00-A)
Contact type: Normally open
Operating (ON) pressure: 490 ± 98.1 kPa {5.0 ± 1.0 kg/cm
Resetting (OFF) pressure: 294 ± 49.0 kPa {3.0 ± 0.5 kg/cm
Function
(PC88MR-E610-042-P-00-A)
This switch is installed to 2 places of the control valve, senses the PPC oil pressure while each actuator is
operated, and turns the switch "ON" when the PPC oil pressure exceeds the specified pressure.
PC88MR-10
(PC88MR-E610-041-P-00-A)
10 Structure and function
2 }
2 }
Electrical control system
10-213