Daewoo Solar 300LC-V Manual page 460

3. Boom Down (Regeneration)
When boom 1 (section 8, Figure 9) spool is shifted by increasing pressure of boom 1 pilot port (Pb8),
neutral passage (R1) is closed. Oil supplied to port (P2) flows through parallel passage (R3) and load
check valve (S8-2) to spool and flows into port (B8).
When spool (AD3) of antidrift valve is shifted by increasing pressure of port (P2), poppet (AD1) is
opened by decreasing of pressure of spring chamber (AD4), and return oil from port (A8) flows to
tank passage. Some return oil opens poppet (S8-3) in boom 1 spool, flows through passage (S8-2),
joins at port (B7), and then prevents cavitation of cylinder rod side.
Figure 9
S0709401K
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Main Control Valve (Kayaba)