Case drain lines are used to keep case pressures constant within a hydraulic system.
In general, a separate case drain line will extend the service life of the shaft seal on the hydraulic motor.
If the carrier being used does NOT have a separate case drain line, the accumulating leakage oil can also be routed into the return line.
In this case, however, it is necessary to ensure that the back pressure does not exceed 5 – 10 bar.
We use a special hydraulic manifold in our “small” HD150, HD250, and HD300 plate compactor attachments.
If the leakage oil connection on the valve manifold is plugged, the leakage oil will be automatically conveyed into the return line in this case.
