Komatsu PC88MR-10 Shop Manual page 173

Merge-divider valve
When control valve is in HOLD and when work equipment is operated (including when work
equipment and travel are operated simultaneously)
Function
Merge-divider spool (3) merges pump discharged pressures (PP1) and (PP2), and merges LS pressures
(PLS1), (PLS2), and (PLS3).
Operation
When the control valve is in HOLD, the right and left travel PPC pressure switches and the work
equipment PPC pressure switch make no output.
The controller does not generate output signal and the merge-divider valve does not generate output
pressure.
When the work equipment is operated, R.H. and L.H. travel PPC pressure switches do not generate
output, but only the work equipment PPC pressure switch generates output.
The controller does not generate output signal and the merge-divider valve does not generate output
pressure.
Pump discharged pressures (PP1) and (PP2) are merged and LS pressures (PLS1), (PLS2), and (PLS3)
are also merged (PP1 = PP2, PLS1 = PLS2 = PLS3).
PC88MR-10
(PC88MR-PP30-040-K-00-A)
10 Structure and function
Control valve
10-95