Table of Contents
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Swing control function
1. Battery disconnect switch
2. Battery
3. Battery relay
4. Fusible link
5. Fuse box
6. Swing parking brake cancel switch
7. Pump controller
8. Machine monitor
9. Oil pressure sensor
10. Main pump
11. Control valve
11a. Merge-divider valve
11b. Self-pressure reducing valve
12. Swing motor
13. Swing parking brake solenoid valve
Input/output signal
a. Swing parking brake cancel switch signal
b: Swing parking brake solenoid valve drive signal
c. CAN signal
d: Oil pressure sensor signal
Function
Swing parking brake function
The swing parking brake (automatic) is interlocked with the swing operation and prevents hydraulic drift
after swing is stopped.
To reduce the load on the swing device during digging work, the swing parking brake is released
simultaneously with arm IN operation or boom SWING operation.
PC88MR-10
(PC88MR-JA01-042-K-00-A)
10 Structure and function
Electrical control system
10-187
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Troubleshooting
