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LS bypass plug
Function
It releases the remaining pressure of LS pressure (PLS).
While moderating increasing rate of LS pressure (PLS), this valve generates pressure loss in the throttle
part of the pressure reducing valve with this discarded throttle flow, decreasing the enabled LS differential
pressure and improving stability.
When work equipment valve is operated (including when work equipment and travel are operated
simultaneously)
Since merge-divider spool (1) is located at the merge position, the pressurized oil in LS circuits (PLS1),
(PLS2), and (PLS3) is drained from filter (a) at the end of LS bypass valve (2) on the (P2) side through
orifice (b) into tank circuit (T).
PC88MR-10
(PC88MR-PNSH-041-K-00-A)
10 Structure and function
Control valve
10-87
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Troubleshooting
