Hydraulic Schematic for Single-Acting Circuit

Breakers and Compactors require a single-acting circuit, which routes oil through the attachment in only one direction. We typically supply a heavy-duty inline relief valve to set maximum circuit pressure.
The return line from the breaker is dumped almost directly to tank. This must be done to reduce return line restriction, or backpressure. In this schematic, the existing auxiliary valve on the excavator is the oil source. Note that the directional function of this valve is not required for single-acting use.
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