Komatsu PC88MR-10 Shop Manual page 211

1. Spool
2. Piston
3. Disc
4. Nut (for lever connection)
5. Joint
6. Plate
7. Retainer
8. Valve body
9. Filter
Operation
(PC-PL28-044-K-00-A)
When valve is in neutral
Ports (A) and (B) of the valve and ports (P1) and (P2) of the PPC valve are connected respectively
through fine control hole (f) of spool (1) to drain chamber (D).
PC88MR-10
10 Structure and function
Work equipment and swing PPC valve
10-133