LG TC91 - Manual (Page 19)

19 Compactor Owner’s Manual
Carrier without Auxiliary Circuit
If the carrier does not have an auxiliary control valve (see Figure 2), a
priority flow control valve must be installed to direct oil flow from the
normal circuit to the compactor. The priority flow control valve is usual-
ly equipped with a flow adjustment and pressure relief.
These auxiliary control valves often need a check valve on the regulated
port to completely close the flow. If too much flow is divided, excess
heat is generated in which case the oil needs to be cooled.
Figure 2, Carrier without Auxiliary Circuit
TYPICAL HYDRAULIC CIRCUITS