See also:    • Pressure Compensated Pump Adjustments...  

The case drain line — it's a critical feature of piston pumps, allowing for lubrication of pistons and slipper pads, absorbing exhaust flow from the pump controller, and preventing the swash plate from moving over center. In this video, we take you through the different flow sources that end up in the case drain line, why they happen, and what you should do to maintain your case drain flow and prevent catastrophic failure.

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